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🚁 | Search for victims in a wide area in the sky during a disaster Rescue training using drones by police and fire department [Saga Prefecture]


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Searching for victims over a wide area in the event of a disaster Police and fire departments use drones for rescue training [Saga Prefecture]

 
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The training was conducted on the assumption that the Chikugo River would be flooded by local heavy rain and rescue people left behind on the riverbank.
 

At the time of the rainy season, training to carry out rescue activities with drones, etc. on the assumption that the river was flooded by heavy rain is the riverbed of the Chikugo River ... → Continue reading

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Chikugo River

Chikugo River(Chikugogawa) isMount AsoAs a water sourceKyushu regionIt flows from east to west in the north in four prefectures: Kumamoto, Oita, Fukuoka, and Saga.Ariake SeaPour intoriver.

River lawBased onMinistry of Land, Infrastructure, Transport and Tourism[Annotation 1]Cabinet OrderBy1965Designated in (40)First-class water system・ Chikugo RiverWater system OfMain streamso,First-class riverIt is specified in.Channel extension 143.0Kilometers,Basin area約 2,860square kilometerIt is the largest river in the Kyushu region in terms of scale.

Tsukushiji (XNUMX) Ro(Tsukushijiro, meaning "the second largest river in Japan in the western part of Japan")[Annotation 2],Tone River(Taro Bando) ・YoshinogawaWith (Shikoku Saburo)Japan's three majorRampage riverIt is said to be one of.Also,UpstreamIn the departmentTanoharu River-Tsuetate River-Mt. Ooyama River-Mikuma RiverAlso called (details will be described later).

Geography

KumamotoAso-gunMinamioguni cho OfMount Aso OfOuter ring,Seto no KogenOriginate in.OitaTo enter the,Hita CityでKusugawaTogether with the western style.FukuokaTo enter theChikushi PlainThrough.KurumeFrom the western part, Fukuoka prefectureSagaIt flows in the southwest direction so as to straddle the river, but due to the change in the flow path, it is often in Fukuoka prefecture even on the northwest side of the Chikugo River, and conversely in Saga prefecture even on the southeast side.

In the Chikugo RiverUpstream-Midstream-downstreamAbout the classification ofMinistry of Land, Infrastructure, Transport and TourismRiver BureauIt is specified in the "Chikugo River System River Improvement Basic Policy" and "Chikugo River System River Improvement Plan" prepared by.That is,

  • Upstream: From the water source, Senomoto Plateau (Minamioguni Town, Aso District, Kumamoto Prefecture)Yomei Dam(Hita City, Oita Prefecture, Fukuoka PrefectureUkiha CityTo the border)
  • Midstream: From Yoake DamChikugo Oizumi(Kurume City, Fukuoka Prefecture, Saga PrefectureSanyo-gun(Miyaki Gun)Miyaki TownTo the border)
  • downstream: From Chikugo OizumiAriake SeaEstuaryUntil

It is classified as.UpstreamNeogeneMt. Aso repeated since theneruptionAso lava spilled by溶岩,AndesiteEtc. as the main bodyGeologyAndLapilli-Volcanic ashBy the accumulation ofStrataIs intricately formed.KyusuikeiIt is steep, such as in the valleyValleyWhile formingHita Basin,Kusu BasinSuch asbasinIs also formed.After passing the Yoake Valley, which forms the boundary between Oita and Fukuoka prefectures, it becomes the middle reaches, but due to the sediment carried by the Chikugo River from the upstream.Alluvial plainFormed.HugeChikushi PlainEstablished the foundation of.The downstream part is also basically an alluvial plain,Saga PlainandYanagawaIn the surrounding basinRenewal of DahuaSince then, the Ariake Sea has continuedReclamationArtificial land formation has also been promoted, and it is in its current form.

Watershed

Of the Chikugo RiverWatershedIs mainly located at the northern foot of Mt. Aso Sonomoto in the upper reaches, and the main stream of the Chikugo River is located from the Senomoto Plateau.Kokonoe MountainThe source is the Kusu River.The rain that falls at the northern foot of Mt. Aso Sotowa generally joins the Chikugo River or Kusu River.

on the other handMt. HikosanThe rain that hangs on the southern foot of the river becomes a tributary of the Hanatsuki River and pours into the Chikugo River.Combine the Kusu River in Hita City, and after passing the Yoake Valley, the Asakura massif in the north and the southMino MountainsDuring this time, the rain that fell on the southern foot of the Asakura massif and the northern foot of the Minō Mountains finally poured into the Chikugo River.

The Tsukushi Plain is especially Kurume CityYame cityIn, the sediments transported from the upper reaches of the Chikugo River were deposited and formed an alluvial plain.Yabe RiverSediment transported from the upstream also contributes to the formation of the Tsukushi Plain.

For this reason, the sediment carried by the Chikugo and Yabe rivers accumulates on each other and is a vast part of the Yame and Yanagawa plains, which are part of the Tsukushi plain.deltaThe area around Yame City, which forms a zone and exists in the middle, is gentle.hillsIt is a watershed between the Chikugo River system and the Yabe River system.Hirokawa flowing through the northern part of Yame cityHanamune RiverJoins the Chikugo River, but a small river in the southern part of Yame City joins the Yabe River.

On the other hand, most of the tributaries that join the Chikugo River from the direction of Saga Prefecture are generallyBack shaking mountainsThe water source is at the southwestern foot of the river, and it eventually joins the Chikugo River or a branch.

In addition, artificially cross the watershedwaterwayThe main examples of the formation of this are the Fukuoka watershed that crosses the watershed in the middle of the Asakura massif and the Sefuri Mountains, and the Chikugo River system.Kase RiverConnecting water systemsSaga water conveyance, And with the Tsue River, a tributary of the Chikugo RiverKikuchi RiverThere is a Tsue tributary that connects the Hasama River, a tributary.

Transportation

Chikugo RiverMeijiBeforeChikuzen country-Chikugo-Hizen country-BungoIt was used as a military strategic point.For this reason, in the Edo periodbridgeIt is strictly forbidden to hang up, as a substitute transportationWater transportationHas developed (described later)ShowaIt was used until the latter period.

motorizationNow that is highly developed, the basin runs through and crosses the Kyushu region.道路とTrainIt is an area where is intersecting, and it is still a key point of transportation.

On the road as it traverses the basinNational Route 3To the topNational Route 208,National Route 211,National Route 212,National Route 322,National Route 385Such asNational roadandPrefectural roadとKyushu ExpresswayThere is something to crossNational Route 34,National Route 210,National Route 264,National Route 386With national and prefectural roads such asOita Expressway,Nagasaki ExpresswayThere is.

JR by trainKagoshima Main LineとNishitetsu Tenjin Omuta Line, Kyushu Shinkansen traverses, JRHisadai Main LineとNagasaki Main Line,Nishitetsu Amagi Line,Amagi RailwayIs crossing.Distribution in the Kyushu region大動脈Is concentrated in the Chikugo River basin and used such a transportation networkIndustrial park,Distribution complexIn addition to being located in many placesFukuoka metropolitan areaIt is also a traffic-intensive area that is often used by commuters and students.

Especially a tributary of the Chikugo RiverHoman RiverLocated in the basinSagaTosu CityAnd located on the south bank of the Chikugo RiverKurume City, Fukuoka PrefectureIs a transportation hub where these traversing and crossing roads and railroads intersect.In the case of Tosu City, on the road, the Kyushu ExpresswayTosu JunctionThe Oita Expressway and the Nagasaki Expressway branch from east to west.

National highway No. 3 to National highway No. 34 in Tosu citySaga City-NagasakiTowardNational Route 500Is FukuokaAsakura CityIt extends in the direction.

JR by trainTosu StationからNagasaki Station-Sasebo StationThe Nagasaki Main Line branches off from the Kagoshima Main Line.In the case of Kurume City, National Route 3 heading toward Hita City, Oita Prefecture from National Route 210, Fukuoka PrefectureKamaRoute 322 heading toward Saga City extends east, and Route 264 heading toward Saga City extends west.Also on the railroad JRKurume StationThe Kyudai Main Line is from the Kagoshima Main Line, and the Nishitetsu Tenjin Omuta Line is on the north bank of the Chikugo River.Miyanojin StationIt branches off from the Nishitetsu Amagi Line.

Although Tosu City and Kurume City are less than 10 kilometers in a straight line across the Chikugo River, major national expressways, highways, and railroads in the Kyushu region intersect vertically and horizontally.further2011In (23)Kyushu ShinkansenIs open.

However, this area was formed by the Chikugo River carrying earth and sand from the upstream.Alluvial plainで洪水It is a vulnerable land (described later),1953(28)6 Of28 West Japan FloodThen, the flood of the Chikugo River cut off all major transportation facilities, and Fukuoka CityKagoshimaThe land route between them was completely cut off.For this reason, ensuring the safety of hydraulic control of the Chikugo River is important from the perspective of economy and logistics.

Changes in name

The name Chikugo River is nowWater systemFirst nameas well as the Water systemMain streamIt is used as the name of, but it was previously called by various river names depending on the time.Also still upstreamOita-KumamotoIt is commonly called by a common name in the basin.

Changes with the times

Chikugo River depends on the timesChitose River / Chitose River(Chitosegawa),Overnight river(Ichiyagawa),Chikugo RiverIt was also called (Chikumagawa).

The name Chikugo River was finally unified as the mainstream name1636(Kanei13 years)[1].

Found in the oldest literatureChitose River / Chitose RiverIn Although,Kamakura PeriodCompiled toOgi WakashoListed in the 24thWakaThe name is written inEdo Period"Utamakura Nayori" and "Yonezawa Domain"Kurume Domain) Poetry selection ”was also written in poetry.

文明-TempoIt is said that "Chitosegawa is an ancient name" is written in "Chikuzen Zokudoki Fudoki" written by the year, and it was established as another name among local residents even after the Chikugo River was decided to be the official name. There is.

Overnight riveraboutMuromachi PeriodThe name is first seen in the Chikugo River development history, which will be described later.洪水It is said to be based on the old tradition that "the abundant land turns into a wasteland overnight."Chikugo RiverAbout in the early Edo periodChikuzen countryとChikugoIt is said that it was derived from the fact that it was flowing in the middle of.

The name Chikugo River became the official name, but this is the material of the Kurume Domain.U.S. chronology"When"Ishihara family diaryThe contents are described in.

In other words, in 1636, the Edo Shogunate ordered the river to be unified to the Chikugo River.Old ageGot down through.HoweverShimabara's turbulenceIs related not only to the Kurume DomainFukuoka domain,Saga Domain,Yanagawa DomainHowever, it was temporarily put on hold because the order to go out was given.

After suppressing the turbulence1638It is written that in (Kanei 15), the bosses, Matsudaira Wakasa Mamoru and Ando Tajima Mamoru, who received the order of the old man again, notified Arima Shusui, the chief retainer of the Kurume Domain, to use the name "Chikugo River". ..

During this time, there is a tradition about the circumstances.That is the Fukuoka domainElderWhen the Kurume feudal lord was assessing the name of the river while he was in attendance, the elder asked the Fukuoka feudal lord, "What should the name of this river be?" When asked suddenly, he slipped over the place where he answered "Chikugo River" and answered "That Chikugo River ...", and the old man decided to "decide on the Chikugo River". ..

From the above circumstances, in 1636 by the order of the Edo ShogunateChikugo RiverIt was officially decided after the end of the Shimabara Rebellion.However, this name is Chikuzen, Chikugo,HizenIt is the name given to the river that flows through the border of the three countries.UpstreamIsBungoWas not called within.

Transition by region

Comprehensive of all rivers that join the main stream of the Chikugo River and finally join the Chikugo RiverWater systemIsChikugo River systemIt is,1964(Showa 39)River lawWith revisionFirst-class water systemSpecified in[Annotation 4]..The name of the Chikugo River, which is the main stream of the water system, was unified in the middle and lower reaches in 1636, but it was called by various river names in the upper reaches.ThereforeBasin areaIs the widestMt. Ooyama RiverThe basin was considered to be the main stream of the Chikugo River, and its length exceeded the Mt. Ooyama River.Kusugawa TheTributaryWas said.Currently under the River ActFirst-class riverDesignated as[Annotation 5]The main stream of the Chikugo River is

Upstream end:KumamotoAso-gunMinamioguni cho8894 Oaza Manganji character Nakazonodai (Tahara Bridge)
Downstream:Ariake Sea OfEstuary

Is supposed to be[Annotation 6]..Therefore, laws and regulations, river management signs, andOitaRiver structures in the main stream of the Chikugo River that exist inside (Matsubara Dam, Mt. Ooyama river dam, movable weir on the island, etc.)SpecificationsEtc. for this sectionFirst-class river Chikugo River system Chikugo RiverIs officially displayed.However, in reality, various names have been given depending on the region, and they are still generally used today.

First is the water sourceMount AsoOuter ringFrom Aso District, Kumamoto PrefectureOguni machiTo the Shigase River confluence in the center, "Tanoharu RiverIs commonly known as.After joining the Shigase River, "Tsuetate RiverAfter merging with the Tsue River at Lake Bairin, which is the Matsubara dam lake, it is known as "Tsuedategawa".Mt. Ooyama RiverChange the name again.

さ ら にHita CityWhen you join the Kusu River inside, this timeMikuma River”(Mikumagawa) and flowed down the city of Hita.AndKagetsu RiverWhen they join, they become the Chikugo River and pour into the Ariake Sea.Therefore, the Chikugo River is really from the water source to the estuary.Change the river name five timesWill be.Geographical Survey InstituteAnd publishersMapIn the current situation, the river name is well established in the local area, and in many cases, the common name is used.

The Chikugo River uses names such as Mt. Ooyama River and Mikuma River upstream, but in this article, unless otherwise specified, it is the name under the River Act.Chikugo River"Unify the notation.The Chikugo River, which is the name of the river, and the Chikugo River, which is the name of the water system, are strictly separate entities, but they are closely related.This article will also explain..The river grade and water system name are omitted from the viewpoint of readability.

Watershed

Mainstream and basin municipalities

As mentioned earlier, the main stream of the Chikugo River is the Tanoharu River, Tsuetate River, and more from the upstream.Mt. Ooyama River-Mikuma RiverChanged the name,OitaHita CityFrom the confluence of the Hanatsuki RiverChikugo RiverIt will be the name ofRiver lawAbove, the Chikugo River is the river that flows from the Senomoto Plateau, which is the headwaters of the Tanoharu River.The municipality where the mainstream flowsKumamoto-Oita-Fukuoka-Saga9 prefectures, XNUMXCity3countySpan.

Popular nameMain tributary
・ Branch
Basin prefectureBasin city county
Tanoharu RiverManganji River (Shizu River)
Shigase River
Odagawa
Baba River
KumamotoAso-gun
Tsuetate RiverNakahara River
Kitasato River
Tsue River
KumamotoAso-gun
OitaHita City
Mt. Ooyama RiverAkaishi River
Kusugawa
OitaHita City
Mikuma RiverKagetsu River
Takase River
Shode River
OitaHita City
Chikugo RiverOhi River
Kumakami River
Sada River
Koishiwara River
Kose River
Hirokawa
Homan River
Tade River
Sagae River
Hanamune River
Hayatsue River
OitaHita City
FukuokaUkiha City-Asakura City-Kurume
Okawa City-Yanagawa-Mitsui District
SagaTosu City-Kanzaki-Saga City
Sanyo-gun

Tributaries / tributaries and basin municipalities

In the Chikugo River system, it finally joins the Chikugo RiverTributaryThe number of239 riversThe second largest river in the Kyushu regionOyodo RiverIt surpasses the water system by about 100 rivers and is by far the best.

The largest river in the tributaryKusugawa(Kusugawa), channel extension 56.0Kilometers-Basin area530.5square kilometerIt has become.When looking upstream from the confluence, the flow path is longer than the main stream of the Chikugo River (Mt. Ooyama River basin), but it is a tributary because it is less than the basin area.Of these tributariesFirst-class riverThe tributary designated as140 riversClimb to.

There are also many diversions,EstuaryDivide in the vicinityHayatsue RiverIn addition to (Hayatsu Egawa), in Hita City in the middle reachesKumakawa-Shode RiverIt splits once and joins again.Furthermore, the Chikugo River, such as the Oishi diversion channel, Haratsurubunsuiro diversion channel, Millennium diversion channel and Morodomi riverWater controlArtificial built in the process of businessFlood BypassAnd there are many old channels.It exists in the Chikugo River system.LakeMost ofArtificial lakeorReservoir.

RiverChannel extension
(km)
Basin area
(km2)
Main tributaryMajor lakesBasin prefectureBasin city county
Tsue RiverSea Bream River
Ueno Tagawa
Honeycomb LakeKumamotoAso-gun
OitaHita City
Kusugawa56.0530.5Choda River
Nogami River
Matsugi River
Jizohara Reservoir
Matsuki dam lake
OitaHita CityKusu-gun
Kagetsu River125.9Onogawa
Arita River
OitaHita City
Ohi River76.8Hoshuyama River
Tsurukawauchi River
FukuokaAsakura-gun
OitaHita City
Kumakami River70.1Koshio RiverGousho Dam(I.e.FukuokaUkiha City
Sada River25.573.0Ibome RiverLake MinaFukuokaAsakura City, Mii District
Koishiwara River84.4Yamami River
Futamatagawa
Lake KamiakizukiFukuokaAsakura City, Asakura District, Mii District
Kose River27.084.7Mochiki River
Minami Shinkawa
FukuokaUkiha City / Kurume City
Homan River172.3Yamaguchi River
Yamake River
Kusaba River
Daigi River
Arakawa
Akimitsu River
Shinhoman River
Lake Tenpai
Yamagami dam lake
Oki dam lake
FukuokaChikushino・ Asakura City ・Ogori
Kurume City, Asakura District, Mii District
SagaTosu City, Miyaki District
Hirokawa74.6Choen RiverHirogawa dam lakeFukuokaKurume CityYame city-Yame District
Tade River21.056.4SagaKanzaki CityKanzaki District
Sagae River13.0157.0Shirohara RiverSagaSaga City / Kanzaki City
FukuokaKurume
Hanamune River39.4FukuokaYame CityChikugo・ Okawa City
Mihama-gun
Hayatsue River6.0SagaSaga City
FukuokaOkawa City

Chikugo River Development History

Chikugo River is as mentioned above1636Until the river name became the current "Chikugo River"Chitose River"Or"Chikugo RiverWas called, but "Overnight riverWas also called.

The meaning is that the basin will be devastated overnight due to the flood.Chikugo OfrentIs recorded as exempted for one year806The modern river maintenance began in earnest from the flood in1889(MeijiBy the time of the flood in 22), 183 major floods had occurred.This is the geology of the main and tributary water sourcesAndesiteThe geology of volcanic rocks has low permeability, and the upstream part has a steep slope, while the downstream part has a gentle slope and the downstream part is easily flooded.

However, the basin is also a fertile breadbasket, and hydraulic control and water utilization in the basin have been carried out continuously since ancient times.

Pioneering and hydraulic control under the feudal government

The reason why people's activities began to be cultivated in the Chikugo River basinJomon PeriodTerminal400 BCIt is estimated to be around.At that time, most of the Tsukushi Plain was the sea, and the mouth of the Chikugo River was also at that time.Back shaking mountainsIt is said that it was biased toward the south.

Large scale hereRing moatIsYoshinogari archeological siteWas born, and since thenYayoi PeriodMid-term3st centuryIt prospered for about 700 years.Welcome after thatcoastlineGradually moved to the southwest, and the Tsukushi Plain, an alluvial plain, was gradually formed in combination with the transportation of sediment from the main and tributaries of the Chikugo River.Renewal of DahuaでBantianWhen is enforcedAriake Sea OfReclamationHas started and is nowYanagawaからSaga PlainIn the lower reaches of the Chikugo RiverRyori systemOrderly byCreekCame to be drawn,Konden Einen Shizai LawThe private ownership of the land was recognized and the group field system collapsed.ManorOnce the creeks were formed, those creeks were also cluttered.Kamakura PeriodOr laterMuromachi PeriodUntil the end of the year, the Chikugo River basinShoji,Otomo,Mr. Ouchi,Ryuzoji,ShimazuDominate one after another,Battle of the Chikugo RiverAlthough many wars were repeated, there was nothing to see about the development of the Chikugo River.

The reason why the development of the Chikugo River came to be actively carried outHideyoshi ToyotomiAchieved national unificationAzuchi-Momoyama PeriodThis is from the development of the Chikugo River on a sandbar at the end of the period.1592(Tensho20 years) Shogen Ogata joined the club to cultivate Dokaijima and survived the interference from the residents of Hizen Province.1610(KeichoIt took 15 years to successfully clear the land (18 years).

1605From (Keicho 10th year)Higo countryKikuchiKikuchi Juzaemon, a descendant of the island, has been on a floating island since 1610.ChikugoMihama-gun(Mizumagun) Resident Saburozaemon pioneered OnojimaNittaWas reclaimed.These islands have been certified as Chikugo country territories and are still today.FukuokaHas become a part of.1622(Genwa8 years)Yanagawa DomainBeniya Shichirozaemon, a wealthy merchant in Mizuma District, who was a monetary maker, has cultivated 80 town walks by reclamation.

Around this time, the reclaimed land was "搦"(Karami) or"Open』(Hiraki) was called. Reclamation for "搦"EmbankmentFrom the technique of entwining branches such as bamboo with the stake that is the center of the stake, it is thought that the etymology of "kai" comes from pioneering, cultivating, and developing.

Water controlBusiness isEdo PeriodFrom the beginningClanIt is started by the initiative.1600(5th year of Keicho)Battle of SekigaharaIn ChikugoKurume CastleLord'sHidekane KobayakawaとYanagikawa CastleLord'sMuneshige Tachibana[Annotation 7]Participated in the Western ArmyReformAnd insteadMitsunari IshidaBy making a great achievement to captureYoshimasa TanakaIs the landlord of Chikugo Ichikuni and Yanagikawa 32 stones1601Although he joined the club (6th year of Keicho), Yoshimasa worked on the repair of the Chikugo River as early as possible.1606It took 11 years from (Keicho 13th year) to the Senoshita district (Kurume city)MeanderShortcut the flow path of the Chikugo River to eliminateSetoshita cut-off(Shosuiro) was excavated and the flow path of the Chikugo River was changed.Tadamasa TanakaBecame the feudal lord of Kurume 21 stones after being reformed by MutsuYutaka ArimaContinues to improve the riverKaneiYear (1624~1643)Anbu embankmentWas embanked.

On the other hand, HizenSaga DomainConsulNaoshima NaoshimaEngraved its name in the history of medieval civil engineeringShigeyasu Naritomi(Naridomi / Shigeyasu) is from HamaguritakeNakagawaThe water that flows down to the Ono River, which is a tributary of the river, is guided around the mountains by a waterway to the Tade River.Hamaguritake"1626Completed in (Kanei 3rd year),Kanzaki District OfIrrigationI tried.

But this converselyFukuoka domainThe water on the side became inconvenient and the Ono River died.There is an anecdote that a woman named "Oman" on the Fukuoka domain side tried to break the embankment to protest this, and both mother and child threw themselves into the waterfall.

After that, Shigeyasu set up an overflow called "Nokoshi" as a measure against flooding of the waterway, and distributed water to the Ono River when the water level increased.Also, ShigeyasuSanne-gun-Yabu-gun(Yabugun) ・Kimono-gun(Kiigun)[Annotation 8]To protect from flood damage1643In (Kanei 20), a 12-kilometer double embankment was built on the right bank of the Chikugo River.

this is"ChirikuhachimanguAlthough it is not left due to river improvement, the levee has not collapsed for nearly 300 years since the embankment, and the local residents have been protected from flood damage.For this reason, the name of Shigeyasu was hailed with great respect in the county, and Kitashigeyasu Village and Minami Shigeyasu Village were once named after Shigeyasu in the county.[Annotation 9]Was as much as it existed.

In addition, as a groyne, water baskets and baskets were installed in various places, but the baskets are used against water currents.Right angleThere is a side effect of cutting the revetment on the opposite bank to weaken the water flow by installing it inKurume DomainHowever, in the lower reaches, the Saga and Yanagawa domains are in conflict.The ironic result was that the flood damage was amplified by each clan's self-establishment of the groyne.

Chikugo River four weirs

17st centuryFrom the second half18st centuryIn each clan in the basinNittaActively carry out developmentTributeI tried to increase the harvest.At this time in the Chikugo RiverChikugo River four weirsCalled "Fixed weirWas built one after another.From the order of completionYamada dam-Oishi Weir-Fukurono Weir-Eri Weir(Tokojima dam) Refers to the four weirs.

The first thing I worked on wasYamada damIs.The opportunity was1662(Kanbun2 years) to the next1663(Kanbun 3rd year)droughtAs a countermeasure, Yamada Weir and its water sourceHorikawa irrigation 1664It was excavated in (Kanbun 4th year), but repeated flood damage caused the Horikawa water intake.ReservoirI filled it with (taisa) and the irrigation stool became worse.

there1722(Kyoho7 years) Improved water intake and automatically opens and closes according to the amount of waterSluiceWith remodeling totunnelThe water supply was stabilized by excavation.As a result, the agricultural land targeted for Horikawa water supply has advanced the development of new rice fields, but it does not benefit from it.Asakura-gunDrought damage continued in Shimo-Oba Village and other areas.

So Shimo Oba VillageShoyaMetKoga HyakukoTo supply water to these areas as wellShinborikawa irrigationApply to the Fukuoka Domain Office for excavation.The sixth feudal lord of the Fukuoka domainKuroda TsugutakaAs a business under the direct control of the Fukuoka Domain1759(Treasure calendarIn 9), the major renovation of the Yamada Weir was started, and the height was raised by 1 meter and the width of the floodgate was doubled to increase the amount of water intake, and water was also supplied to areas that did not benefit from conventional water.This Shinborikawa irrigation water1764It took 14 years to complete (5th year of the Horeki) and 150HaWas supplied with water.

In addition, Hyakuko made a plan for the second major renovation of the Yamada Weir, which was opposed by farmers in Nagata, Asakura District, downstream.Nagata area湿 地The reason was that it was a belt and the damage caused by inundation would increase if water was drawn, but Hyakuko persuaded the residents of Nagata to agree to carry out "wetlanding work" to dry the wetlands in the area. Get permission from the domain office.

And1790(KanseiIn 2 years), the Yamada weir was renovated, and two years later, the promised "Nagata wet drainage work" was started, which took 2 years.1825(BunseiIt was completed in 8 years).The Horikawa Aqueduct is used to supply water to paddy fields.Water millWas set up in various places, but as the largest oneAsakura Triple Water WheelThere is.

The next plan wasOishi Weir.Ukiha-gunThe southern banks of the Chikugo River, such as Natsuume Village, Kiyosou Village, Takada Village, Imatake Village, and Suge Village, were poorly harvested areas with poor water access despite the proximity of the Chikugo River.It was a shoya in the same area to draw water to improve the harvest and save the poverty of the farmers.Kuribayashi Jibei-Honmatsu Heiemon-Yamashita Sukezaemon-Shigetomi Heizaemon-Sakunosuke InoyamaFive peopleOishi irrigation waterI made an excavation plan. The plan was promoted after the drought in 1663, and an application for permission was made to Takamura Gon, who is a magistrate of Ukiha-gun. I submitted an application.

Initially, permission from the domain office was not obtained, but Gentao Yamamura, who was a Fushin Bugyo of the Kurume domain, visited the site at the request of 5 Shoya, and as a result, as a result of discussions based on detailed investigations, in 1664, with Yamada Weir. At about the same time, as a business under the direct control of the Kurume Domain, the third feudal lord of the Kurume DomainArima Yoritoshi TheElder-Niwa YoromoWas ordered to take overall command of construction and construction was started.First, the Oishi lock, which is the intakeIkuha-gunConstructed on Oishi, 3.6 meters wide and 3.0 kilometers long irrigation canal.

Next day1665In (Kanbun 5th year), construction work was carried out to add a floodgate and double the width of the channel.further1666In (Kanbun 6th year), the Chikugo RiverTributaryAfter the construction to accommodate the surplus water in the Kosegawa River, the construction to accommodate the water in the Kumakami River, which is a tributary of the Chikugo River, was finally carried out.1667Kumakami River, which was held in (Kanbun 7th year) and was already completedNagano weirA large stone weir was constructed at the Oishi floodgate point to carry out rational water operation with.1674(EnpoIt was completed in 2 years).As a result, the Chikugo River and its tributaries, the Kose River and the Kumakami River, were connected through the Oishi irrigation water, and by accommodating the water, efficient water management was achieved, and 500 hectares of agricultural land benefited.

Oshoya, which controls 28 villages in Ukiha-gun, inspired by the completion of the Oishi damYasanzaemon Tashiro Shigeei(Shigehide) is the eldest sonShigehiro TashiroWith (from Shige)Fukurono WeirPlanned to build. "GoshoyaSince the Oishi irrigation water was completed by the hands of, there is no doubt that it will not be possible to complete the cut-through of Fukurono. "1672(Kanbun 12th year) I applied for a construction request to the Kurume Domain Office, and obtained permission after investigating the domain.The current planUkiha CityThe plan was to set up an intake at the Tatsuse point in the dawn to draw water, but this point was the point of the Yomei Gorge on the Chikugo River, and the cliff approached the riverbank, and in addition it was large.MeanderSince it was a section that has been constructed, the length of the canal will be long in normal irrigation construction.

For this reason, Shigeei and Shigeo father and son dug a tunnel with a total length of 1.3 kilometers from the otter to the lottery yard, which is the exit, after difficult construction.1673(Kanbun 13 years)Fukurono irrigation waterWas completed.However, since the expected amount of water could not be secured after the completion of the irrigation, we decided to install a weir near the irrigation intake.

This is Fukurono Weir1676(4th year of Enpo), a fixed weir with a length of 120 meters and a width of 110 meters was completed, and 450 hectares were moistened.Unlike the other three weirs, this Fukurono weir and irrigation weir are not under the direct control of the clan, but were constructed by Tashiro's father and son with private fortune.

The last thing was plannedEri Weir(Tokojima dam).Mii-gun-Mihara-gunBoth counties also had poor water access, and the residents of the basin wanted to use the water from the Chikugo River somehow.For some time, the Tokojima site, which is near the confluence with the Sada River, has been regarded as a promising candidate for an intake point for irrigation construction, but this point is a rapid stream with a large amount of water, and is also the boundary between the Fukuoka and Kurume domains. Technical and political issues delayed the start of construction.

However, the momentum for the development of Nitta increased and it was a shoya in the same area.Takayama Rokuemon-Shinzaemon Akiyama-Kiyoemon Nakagaki-Bay Jinzaemon The1710(HoeiIn May 7), he explained the necessity of irrigation excavation to the father and son of Honjo City, who was the president of Mii District.The father and son of Honjo agreed with this and submitted a petition to the Kurume Domain under the joint name of 5 villages in the same county.The sixth feudal lord of the Kurume DomainArima NorifusaOrdered the Kurume Domain Fushin Bugyo, Mataroku Kusano, and others to proceed immediately as a project under the direct control of the Kurume Domain, but the residents of the Fukuoka Domain, Nagata, Asakura District, on the opposite bank, strongly opposed this plan.

The reason is that, as in the case of the opposition to the construction of the Yamada weir, the construction of the weir causes water to flow in and causes flood damage.1711(Hoei 8) Shoya in 11 villages, including Rokunosuke Kawagoe, sent a protest letter to the Kurume Domain to cancel the construction, and once settled by moving the Tokojima floodgate, which is the intake, to 2.2 kilometers downstream, but water transportation When Kawagoe was selected as the Nakaso point for the convenience of the two clan, it developed into a clan border dispute because this point was an area where the boundary between the two clan was not set.

On the other hand, it was Soden Village Shoya to complete the weir at an early stage.Marubayashi ZenzaemonPersuaded the residents of the Nagata area that "Nakaso is the area of ​​Soden Village", but on the contrary, the residentsabductionImprisonmentAfter being donetortureHe was detained for three months.The act of Zenzaemon, who dared to take the risk and sought a solution by himself in order to save the poor farmers, eventually obtained the consent of the residents on both banks.1712(Masanori2 years) Finally completed. 1,428 hectares of new land have been cleared and farmers on both banks are now able to harvest on an equal footing.However, Zenzaemon was seriously injured by torture and became physically handicapped, accelerating his death.

In this way, the Chikugo River four weirs were a water utilization project led by Shoya, and the idea behind them was to save the needy farmers.The life-threatening behavior seen in Soden Village Shoya Marubayashi Zenzaemon has moved the clan and has provided great benefits to agriculture in the basin to this day.

The three weirs, Yamada, Oishi, and Eri, are still in operation, but the Fukurono weir is1954Completed in (29)Yomei DamIt was submerged by the sword, and it cannot be seen now.Instead of the Fukurono weir, a Fukurono intake tower is installed at the same point to supply water.

Modern Chikugo River development

MeijiSubsequent hydraulic engineering projects on the Chikugo River were carried out in consideration of the water transportation that was developing at that time.Chikugo River1884From (Meiji 17)Ministry of InteriorBeing subject to direct control river projects1886From (Meiji 19)First phase Chikugo River water repair projectFrom the estuaryOitaHita CityAlthough it was started in the meantime, the main work was low water floor construction to strengthen water transportation.

またYodogawa-Kiso River-Kuzuryu RiverWe made an effort to improve rivers all over the country.Johannis De LekeWas also involved in river improvement in the Chikugo River, but at this time as well, the main focus was on strengthening boat transportation, and an intermittent diversion bank was constructed 6 kilometers from the mouth of the Chikugo River to control sedimentation at the mouth of the river and provide water transportation. planned.But1889(Meiji 22) An unprecedented flood occurred in the basin, which triggered this.1923(Taisho12 years)Second phase Chikugo River river water repair projectWas done.

In the second phase, in addition to the construction of the main tributary embankment, the excavation work of the main stream of the Chikugo River, which was started in the first phase, was carried out in earnest, and the four cut-off channels of Kanashima, Komorino, Tenkenji, and Sakaguchi were excavated. The river channel was straightened to improve the flow capacity.This project was planned by Masayoshi Tanaka at the end of the Tokugawa shogunate, and at his own expense he made a one-thousandth model of the Chikugo River and demonstrated its effectiveness.This model is Japan's first river irrigation model experiment.This cut-off reduced the total length by 4 kilometers.

Regarding modern irrigation, in addition to the conventional four weirs of the Chikugo River, pumping water has come to be taken in the tidal section in the section 29 km from the mouth of the Chikugo River.In this sectionhigh tideTo become andAriake Sea OfseawaterRuns up to the Chikugo River, but at this time the river water flowing from the upstream is pushed up to the surface of the river by seawater.

Such river water is written as "fresh water" and "AoAlthough it is called locally, the intake of irrigation water using this blue has become popular since the Edo period.Initially at a floodgate, etc.CreekWater was taken from the water, but in the Meiji erapumpWater intake by 1HaAgricultural land supplies water by Ao.On the other hand, direct water intake in the middle reaches of the Chikugo River is also carried out by a pump.1893In Kurume City (Meiji 26)Steam enginePump water intake was started.

AmagiEtc. Northern Ryotsuku Plain and Minō MountainsYamechaIn the production areas of Japan, pumps are installed in various places to supply water, but excessive water intake later caused a new water shortage.

The water used by the Chikugo River, which was conventionally used only for irrigation of agricultural land, is similar to that of rivers in various parts of Japan.Meiji Era OfWealthy soldiersGradually due to policies etc.Water supply,Industrial water supply,HydropowerIt came to be used for.WaterAs for the water supply by Kurume City in 1923May 7It was planned for the first time in the Chikugo River basin,1925(Taisho 14)May 3Started business with the permission of the Ministry of Interior.

1930(Showa 5) Up to 1 per second in JanuaryCubic meterWater supply has started.

after thatHita CityHowever, the water supply businessSecond World WarIt was done later.

As for industrial water supply, water intake has started mainly in Kurume City.1931(Showa 6)Nippon RubberとBridgestoneSince the start of water intake from the Chikugo RiverMoonstar Kasei 1943Playing a central role in Kurume City's industry, such as taking water in (Showa 18)rubberThe manufacturing industry uses the Chikugo River.

After the warAjinomoto 1961In (Showa 36), we started taking water from the Chikugo River.Kirin Beer,Coca ColaThe factories in Kyushu also take water from the Chikugo River system, and both companies produce it in Kyushu.beer,Soft drinkThe water of the Chikugo River is used for.

Hydropowerabout1907(Meiji 40) Hita Suido Co., Ltd. outputs 1,000 km to the Chikugo River (Mikuma River)WattIt was the first time that the Ishii power plant was operated.After that mainlyKusugawaDevelopment is done in the basin,1913(Taisho 2)May 12At the most downstream part of the Kusu River near the confluence of the Chikugo RiverOnagohata Power Station(Onago Hatatsudensho) has started operation.This is the water taken from the middle reaches of the Kusu River and the upper reaches of the Chikugo River.damTo store water in the power plant and guide it to the power plant to generate electricity.Waterway power plantIs.The output of 2 kW was a large-scale hydroelectric power plant at that time, andInawashiro in the east, women's field in the west]FukushimaYama-gunInawashiroWas built inInaedai Daiichi Power StationIs called side by sideHydroelectric power plantMet. In 1922, in the most upstream Jizohara RiverEarth damThe Machida No. 7,600 and No. XNUMX power plants (total output of XNUMX kW) that construct the Jizohara Dam and use the water are also in operation, and the Kusu River basin was one of the leading in Kyushu at that time.Power zoneIt became.

After the war, in the main stream of Chikugo RiverYoake Power Station(Output 1 kW)1954(Showa 29),Shimouke Power Station(Output 1 kW)1969(Showa 44),Matsubara Power Station(Output 5 kW)1971Operation will start in (Showa 46), but both are in the upper reaches of the main stream of the Chikugo River.Dam power stationIs.The last one was builtYanagimata Power StationThen, the water conducted from the Matsubara Dam on the main stream of the Chikugo River is stored at the Takase River Dam, which was constructed on the Takase River, a tributary of the Chikugo River that joins in Hita City.Furthermore, water is conducted from the Takase River Dam to the power plant constructed near the main stream of the Chikugo River to generate electricity.Dam waterway type power plantThe output is 6 kW, which is the largest in the Chikugo River system.

The total output of the Chikugo River basin is21 kWHowever, no new hydroelectric power generation has been carried out since the Yanagimata power plant.Pumped storage power generationNo hydroelectric power plants with more than 10 kW have been built.It is one of the first-class rivers where power development has not been carried out much for its steep terrain and abundant water volume.

Chikugo River system hydraulic control basic plan

For details on the damage to the Chikugo River basin caused by the floods in western Japan in 28Showa 28 West Japan Flood #Chikugo River BasinSee.

After the war, it is indispensable to talk about the hydraulic control of the Chikugo River.1953(28)May 6からMay 6Occurred over28 West Japan FloodIs.At this time, Kumamoto Prefecture, upstream of the Chikugo RiverAso-gunOguni machiOn June 6th, it started to rain 25mm in one day, and in five days.Mount AsoTotal rainfall exceeds 1,000 mmTorrential rainIt became.

This caused the Chikugo River to cause the worst flood ever.KurumeStartAsakura-gun-Ukiha-gunThe Chikugo River basin suffered the worst flood damage since recorded history, with 147 dead and 54 victims.U.S. Army,Security forcesAlso carried out rescue activities.in particular,MidstreamAt the dawn point of the clubKyushu Electric PowerWas buildingYomei DamCollapsed due to strong water currents on both banksDam breakInvited the situation.This became a temporary problem, such as the establishment of an investigation committee later, but the fundamental problem was inadequate river maintenance rather than dam failure.

Ministry of ConstructionKyushu Regional Construction Bureau[Annotation 10] The1949Based on the "River Revision and Rehabilitation Plan" (24), a plan was made to construct dams on the Kusu and Tsue rivers, which are tributaries of the Chikugo River.Planned high water flowWas forced to revise.

1957(Showa 32) "Chikugo River system hydraulic control basic plan”, And in thisMultipurpose dambyFlood controlIt was concluded that is essential, and as a result, near the confluence of the Tsue River in the main stream of the Chikugo River.Matsubara Dam, In the Tsue River just upstream of Matsubara DamShimouke Dam(Shimoke Dam) was constructed to control floods,1973Both dams were completed in (48).

Also, in the middle reaches1961From (Showa 36), "Thousand-year diversion channel, Haratsurubunsuiro diversion channel, Oishi diversion channel"Three major waterwaysWas built1979The project was completed in (54).

In the lower reaches1966In Kurume City from (Showa 41)Higashikushihara large-scale embankment projectHas been started, and the relocation of residentsWest Japan RailwayTenjin Omuta LineAlthough it was difficult to replace 4 bridges such as the Chikugo River railway bridge1993It was completed in (5).

Saga CityAbout the Sagae River that flows through1980Due to flood damage (55)Severe Disaster LawIn the wake of being designated asSagae River catastrophic disaster countermeasure special emergency projectDesignated as a (special project), maintenance of drainage pump stationsMeanderThe part was straightened.

Other than thisHoman River・ Koishiwara River ・Hanamune River・ For major tributaries such as Hirokawa, embankments were constructed, floodgates were reconstructed to prevent flood backflow on the Chikugo River, bridges were constructed, and river width was expanded.Currently in the tributary Shirohara RiverShirohara River DamIs under construction.

While carrying out river improvement for small and medium-sized rivers in the Chikugo River system, which is also managed by Fukuoka PrefectureNational treasuryReceived assistanceAuxiliary multipurpose dam-Auxiliary hydraulic damWe are conducting business, and completed the Yamagami Dam (Yamaguchi River) and Kawachi Dam (Daigi River) on the tributary of the Homan River, and the Hirogawa Dam on the Hirogawa River.

CurrentlyUkiha CityFujinami Dam on the Kose RiverFlood control damIs being built as.

Chikugo River Water Resources Development Basic Plan

Regarding water utilization, in the plains, agricultural water was mainly taken from Oishi Weir, Eri Weir, Yamada Weir and fresh water (Ao), but on the plateau, groundwater was pumped up by a pump.

However, as a result of the disorderly installation of 1,400 water pumps, water shortages due to the decrease in groundwater and soaring maintenance costs for water pumps became problems. "Land improvement project at the foot of Mt. Mino" was planned.

on the other hand,Fukuoka City・ Kurume City ・ Omuta City ・Saga CityIn urban areas such as Japan, the population has increased rapidly and the demand for water supply has become tight.Under these circumstances1962(Showa 37) The "Water Resources Development Promotion Law" and "Water Resources Development Corporation Law" were enforced and the Water Resources Development Corporation[Annotation 11]Was launched.Chikugo River1964Designated as a water resource development water system in (39), "Chikugo River Water Resources Development Basic Plan"(Full plan) was formulated.

In addition, Kyushu Regional Construction Bureau, Ministry of ConstructionMinistry of Agriculture[Annotation 12]Kyushu Agricultural Administration Bureau-Ministry of International Trade and Industry[Annotation 13]Fukuoka Trade and Industry Bureau, four prefectures in northern Kyushu, and related economic organizations such as the Kyushu-Yamaguchi Economic Federation1963In 38, the "Northern Kyushu Water Resources Development Council" was formed to carry out comprehensive water utilization development for the Chikugo River system.Promote further water resource development of the Chikugo River system centered on the full planFukuoka metropolitan areaTo ensure the water supply of1969(Showa 44) March, "Northern Kyushu Water Resources Development Master Plan"created.

In this plan, not only the Chikugo River systemOngagawaWater system,Kase RiverWater system,Yabe RiverWater system,Rokkaku RiverWater system andKikuchi RiverIt was decided to carry out large-scale comprehensive development using a multipurpose dam, including the water system, to stabilize water demand in northern Kyushu, which is suffering from water shortages, and to use water as reasonably as possible.

Based on this, the plan was to use the Chikugo River Mainstream Kanedate Dam.Chikugo Oizumi, Inomata Dam and Kusu River Dam on the Kusu River, Hyugano Dam on the Hanatsuki River, and other three dams, Koishiwara RiverEgawa Dam(Fukuoka City Waterworks Bureau), Of the Sada RiverTerauchi Dam, Kumakami RiverGousho Dam(Gosho Dam), a tributary of the Yabe RiverHoshino RiverManako Dam, on the Kase RiverKasegawa Dam, On the Hasama River, a tributary of the Kikuchi RiverRyumon DamWe tried to provide efficient water supply by accommodating water between water systems through Saga water conveyance and Tsue diversion.

Based on this, dam and irrigation development was promoted,1975In (50), the Egawa Dam was constructed and the Ryotsuku Plain irrigation project was completed.1979(Showa 54)Fukuoka water conveyanceTerauchi Dam was constructed as a water source for the project,1978(Showa 53)Fukuoka droughtThe operation was tentatively started in.After that, the Fukuoka water conveyance business1983Although water was passed in (58)1985(Showa 60) Chikugo Oizumi,1993With the completion of the Gousho Dam in (5), business expansion and maintenance has progressed, and Fukuoka CityDazaifu City-ChikushinoEtc. in 9 cities and 9 townsWater supplyIs being supplied.

In the downstream part, the Chikugo Oizumi is used as the water source.Ministry of AgricultureThe "Chikugo River Downstream Water Project" was constructed in collaboration with the "National Chikugo River Downstream Land Improvement Project" of the Kyushu Regional Agricultural Administration Bureau.The water for the lower reaches of the Chikugo River is from Kurume City.Omuta City・ Saga City ・Tosu CityIt supplies water supply and agricultural water for 9 cities and 13 towns and villages.Furthermore, "Matsubara / Shimouke", which adds a water supply purpose to the Matsubara / Shimouke Dam, which had no purpose of supplying water in the past.Dam redevelopment projectWas carried out, and the capacity allocation of Bairin Lake (Matsubara Dam Lake) and Honeycomb Lake (Shimouke Dam Lake) was reexamined to establish water utilization capacity.

ThisHita CityIn addition to strengthening the water supply to the city, in collaboration with the Chikugo Oizumi and the Mt. Ooyama River Dam of Kyushu Electric Power ManagementSweetfish-Etsu-NoriChikugo RiverAriake Sea OfFishery:For the purpose of resource conservationRiver maintenance dischargeAnd fishery protection and riversEcosystemI am trying to maintain.

But1994(HeiseiIn the drought in Fukuoka (6 years), no water truck was dispatched, but the water supply was restricted for 290 days, so the water source was further improved as a countermeasure, and now it is.Koishiwara River Dam(Koishiwara River) ・ Construction of Mt. Ooyama Dam (Akaishi River) is underway.In addition, we will promote efficient water operation in cooperation with the Kikuchi River system, and strengthen the water supply by using the Tsue diversion channel constructed between the Ryumon dam and the Tsue diversion weir (Tsue river) upstream of the Shimouke dam. I am also planning.

Warning bell for river administration-Honeycomb castle conflict-

Many dams for hydraulic control and water utilization were constructed on the Chikugo River, but on the other hand, from early on.Public worksThe problem of how to proceed was highlighted.The representative is "Matsubara Dam / Shimouke Dam"Honeycomb Castle ConflictIt is.

1957The construction of the dam was planned from (32), but the residents opposed the fact that the residents' briefing session of the Kyushu Regional Construction Bureau did not explain any measures to rebuild their lives, and the following yearTomoyuki MuroharaAn "absolute opposition resolution" was made around the site, and a "honeycomb castle" was constructed and siege at the Shimouke Dam site as a manifestation of the intention of a thorough anti-war against the Ministry of Construction.

During this time, with public works projects such as bloodshed cases against forced execution and administrative litigation to suspend construction.Basic human rights(Article 29 of the ConstitutionProperty rightMurohara continued to pose the problem of infringement to the administration.Honeycomb Castle fell in 1964, but Murohara's resistance killed him.1970It continued until (Showa 45).

However, this conflict is a relief system for submerged areas.River comprehensive development projectIt was a big opportunity to let the administration recognize the deficiency of.In 1973, after the death of Murohara, the aim was to improve the livelihood and welfare of local residents by systematically developing and promoting the industrial infrastructure of the submerged area.Water Source Area Measures Special Measures Law"(Water Special Law) was enforced.River law-Land acquisition law-Specific multipurpose dam methodWas also revised at the same time.

The 13-year beehive castle conflict was a turning point where the river administration changed its perspective from development priority to coexistence with the region, and had a great impact on the subsequent dam construction.

Murohara's words, "Public works must be reasonable, legal, and compassionate," continue to live as the basis of compensation negotiations, and public works reviews since the 1990s are an extension of this. is there.

Inomata Dam, which was planned to be constructed in the uppermost part of the Kusu River in the Chikugo River[Annotation 14]Was canceled.

In addition, the Tsuetate Dam, Kusu River Dam, Hyugano Dam, etc., which were planned in the "Northern Kyushu Water Resources Development Master Plan", ended in failure.

Currently planned for the Shirohara RiverShirohara River DamThe locals are divided into pros and cons and are out of control.Great Heisei mergerWas born inKanzakiThe mayoral election was also an issue, and the new mayor who was born is in favor of the dam.

またFurukawa YasushiGovernor of Saga Prefecture ThePerforated damProposed dam construction by the method to the Ministry of Land, Infrastructure, Transport and Tourism, which is a business operator, and in response to this, the Ministry of Land, Infrastructure, Transport and Tourism started the Shirohara River Dam from a multipurpose dam.Flood control damChanged to.

However1979Twenty-nine years have already passed since the announcement of the plan (54).In addition, the opposition of the residents is fierce even though it is under construction on the Kose River.2009It took 21 years to complete (39).

Eradication of Schistosoma japonicum

The lower reaches of the Chikugo River basin used to beTone RiverDownstreamIbaraki,Fuji RiverBasinYamanashiKofu basin,Ashida RiverBasinHiroshimaFuk'an CountyKannabe TownAlong with Katayama districtSchistosoma japonicumIn the infiltrated land of (Nihonjuketsukichuchu)parasitic diseaseIs one ofSchistosoma japonicum (local disease)It was a diseased area.

What is Schistosoma japonicum?OncomelaniaA snail called (Katayamagai)Intermediate hostAs humans who entered the riverMammalTo皮膚More Schistosoma japonicum larvae (Cercaria) Is parasitic,DermatitisSchistosoma japonicum that has grown into an adult after exhibiting acute symptoms such as high fever and gastrointestinal symptoms as the first symptomliver,spleenChronic nest-eating, when many parasites become severeCirrhosisbyjaundice,AscitesIt is a disease that develops and eventually leads to death.At that time, there were few effective treatments when it developed.[Annotation 15]As a result, many basin residents were infected and fell ill.

In the Chikugo River basin, especially the tributariesHoman RiverFrom the confluence of the basin (main stream of the Homan River, Shin Homan River, Arakawa) and the Chikugo River, the currentNational Route 264Fukuoka prefecture around Mamezu BridgeKurume·Saga PrefectureSanyo-gunThe surrounding area was a large distribution area.

In addition to early detection and treatment of Schistosoma japonicum patients, infection prevention measures, as well as measures taken by basin municipalities such as Fukuoka Prefecture and Kurume City.WaterwayBy spraying chemicals on the host,Final hostIsVoleHowever, the only solution was to artificially exterminate the Oncomelania humilis.

Therefore, he is the river manager of the Chikugo River.Ministry of ConstructionThe Kyushu Regional Construction Bureau has decided to incorporate the eradication of Oncomelania humilis as a countermeasure against Schistosoma japonicum into the river improvement that is being implemented as part of the hydraulic control project.In particularRiverbedLevelingconcreteBy improving the revetment, it is suitable for breeding Oncomelania humilis.SusukiHara湿 地By burying the obi, it was to drive the habitat into ruin.

The project by the Ministry of Construction1965Started in (40), first of all, riverbed maintenance in the Homan River basinSluiceThe revetment work was carried out by the renovation of.As a result, in the lower reaches of the Homan River1970By (Showa 45), we succeeded in eradicating Oncomelania humilis except for the Komorino district in Kurume City on the left bank of the Shinhoman River.UpstreamTosu CityBut,1969After the outbreak of Oncomelania humilis in (44), the pampas grass was thoroughly cut and eradicated.

However, in the Komorino district of Kurume City on the left bank of the Shinhoman River, the habitat of infected Oncomelania humilis has been continuously confirmed, and countermeasures have been required.

The Ministry of Construction formulated the second five-year plan for the Chikugo River flood control project in 1965, and planned the "Kurume City Higashi Kushihara Large-scale Embankment Project" as a large-scale embankment project in Kurume City.AlsoJapan Water AgencyAs part of the Chikugo River Water Resources Development Basic PlanChikugo OizumiPlanned to build.Both of these projects will involve large-scale riverbed rehabilitation, but since they will be constructed in the final distribution area of ​​Oncomelania humilis, they have also embarked on a full-scale eradication of Schistosoma japonicum.

1984In (59), Chikugo Oizumi,1993The Higashikushihara Embankment Project will be completed in 5, but during this time, the Ministry of Construction and the Japan Water Agency have carried out thorough riverbed maintenance.EmbankmentIn the basin municipalities such as Kurume City, the riverbeds were cleaned and pampas grass was cut off, and the habitat of Oncomelania humilis was destroyed.As a result,1990In (2), Fukuoka Prefecture and Kurume City conducted a habitat survey of Oncomelania humilis and confirmed that the Oncomelania humilis had been eradicated.Safety Declaration"announced.

However, due to the fact that Schistosoma japonicum is a chronic disease and the reason for eliminating omissions in the survey, a follow-up survey was conducted for another 10 years.After the investigation2000(12), since there were no newly infected patients or outbreaks of Oncomelania humilis, "Declaration of terminationWas announced, and the schistosoma japonicum that has plagued the residents of the Chikugo River basin for many yearsSucceeded in complete eradicationdid.At the same time, it was eradicated in other infected areas such as the Tone River and Fuji River, and Japan was the only one in the world to succeed in eradicating Schistosoma japonicum.

Schistosoma japonicum does not exist in Japan as of 2014,public healthHowever, it is certain that the Oncomelania humilis was artificially extinct from the Chikugo River basin, and a "Miyairi Kai Memorial Monument" was erected in Kurume City to memorialize the Oncomelania humilis.

River facilities of the Chikugo River system

The river development of the Chikugo RiverEdo PeriodBeginning with the four major intake weirs in the middle period, but the four basin clan (Fukuoka domain-Saga Domain-Kurume Domain-Yanagawa DomainIt was ironic that the damage caused by floods would rather expand due to the inconsistent flood control and water utilization facilities.

After the renovation of the Meiji era1953(Showa 28)28 West Japan FloodTaking advantage of the great flood of the Chikugo RiverMinistry of Construction(Ministry of Land, Infrastructure, Transport and TourismKyusyuRegional Development Bureau)by"Chikugo River system hydraulic control basic plan"bydam-Spillway・ Hydraulic engineering such as embankments was carried out.

In addition,1964In (39), it was designated as a water resource development water system in accordance with the "Water Resources Development Promotion Law", and the Water Resources Development Corporation (Independent administrative agencyWater Resources Organization) Was systematically constructed.HydropoweraboutTaisho eraMainly starting with the Onagohata Power StationKusugawaPower generation facilities were built in the basin, but did not lead to large-scale power development.

once
Tributary name
(Honkawa)
secondary
Tributary name
three times
Tributary name
Dam nameBank height
(M)
Total water storage
Eur-lex.europa.eu eur-lex.europa.eu
(thousandm3)
Modelbusiness personRemarks
Chikugo River--Matsubara Dam83.054,600GravityMinistry of Land, Infrastructure, Transport and Tourism(Mt. Ooyama River)
Chikugo River--Mt. Ooyama River Dam--GravityKyushu Electric PowerSmall dam
Chikugo River--Movable weir on the island--Movable weirMinistry of Land, Infrastructure, Transport and Tourism(Mikuma River)
Chikugo River--Yomei Dam15.04,050GravityKyushu Electric Power
Chikugo River--Yamada dam-Fixed weirLand improvement areaChikugo River Four Great Weirs
Chikugo River--Eri Weir--Fixed weirLand improvement areaChikugo River Four Great Weirs
Chikugo River--Oishi Weir--Fixed weirLand improvement areaChikugo River Four Great Weirs
Chikugo River--Haratsurubunsuiro--SpillwayMinistry of Land, Infrastructure, Transport and Tourism
Chikugo River--Oishi Flood Bypass--SpillwayMinistry of Land, Infrastructure, Transport and Tourism
Chikugo River--Millennium Flood Bypass--SpillwayMinistry of Land, Infrastructure, Transport and Tourism
Chikugo River--Chikugo Oizumi13.85,500Movable weirWater Resources Organization
Tsue River--Shimouke Dam98.059,300Arch typeMinistry of Land, Infrastructure, Transport and Tourism
Akaishi River--Mt. Ooyama Dam99.019,600GravityWater Resources OrganizationUnder construction
Kusugawa(Outside the river)-Women's field first regulating pond
(No. 2)
20.3312GroundKyushu Electric Power
Kusugawa(Outside the river)-Women's field first regulating pond
(No. 3)
26.7312GroundKyushu Electric Power
KusugawaJizohara River-Jizohara Dam21.81,858GroundKyushu Electric Power
KusugawaMatsugi River-Matsuki Dam48.51,300GravityOita
KusugawaWomen's Hatagawa-Women's field second regulating pond34.3392GravityKyushu Electric PowerCivil engineering heritage
Takase River--Takase River Dam25.6273GravityKyushu Electric Power
Kumakami River--Gousho Dam60.77,660Rock fillFukuoka
Sada River--Terauchi Dam83.018,000Rock fillWater Resources Organization
Koishiwara River--Koishiwara River Dam129.040,000Rock fillWater Resources OrganizationPlanning
Koishiwara River--Egawa Dam79.225,326GravityWater Resources Organization
Kose River--52.02,515Rock fillFukuoka
Homan RiverYamaguchi River-Yamagami Dam59.02,980Compound expressionFukuoka
Homan RiverYamaguchi RiverUgahara RiverYamaguchi regulating pond60.03,900Rock fillWater Resources Organization
Hirokawa--Hirogawa Dam29.2990Rock fillFukuoka
Homan RiverDaigi River-Kawachi dam35.01,995GroundSaga
Sagae RiverShirohara River-Shirohara River Dam98.515,800Rock fillMinistry of Land, Infrastructure, Transport and TourismPlanning

(Note): The yellow column indicates the dam under construction or planning (2009Current).

Water transport and bridges

Chikugo RiverKurume Domain(Arima family),Fukuoka domain(Kuroda family),Saga Domain(Nabeshima family),Yanagawa Domain(Tachibana family)'S four clan bordered each other, and there were frequent border conflicts and water conflicts, and the mutual relationship was terrible.For this reason, bridging is strictly prohibited from the viewpoint of clan defense, and as a substitute transportation.Water transportationHas developed.1789(KanseiIn the "Chikugo Kamisangun Interrogation Handbook" edited in the first year), 19 ferryboats have already been registered, and the number has continued to increase since then, with 62 ferryboats at its peak.FerryIt became enough to count.

Also on both banks of the Chikugo RiverTenshoOnojima, which was developed by Saburozaemon, a resident of Mizuma District, was gradually emphasized as a transportation hub, and the port was developed.The Saga domain is nowSaga CityMorotomi TownToMorotomi PortWas built and used as a military base for the clan.In addition, the Kurume domain1751(Treasure calendarIn the first year), the XNUMXth feudal lordArima YoriyukiWith the life of (Yuki)Mihama-gunHainuzuka Village (Chikugo) Relocate the inhabitantsWakatsu PortWas built as a base for the transportation of goods such as agricultural products.

The current development was made by the construction of Wakatsu Port.Okawa CitySo, upstream BungoHitaBy boat or raftCedarIs transported, and the timber processing industry develops as a timber accumulation area.Even nowClosetIt is the main production area of.In addition, the Kurume Domain, Saga Domain, and Yanagawa Domain set up river lines along the Chikugo and Hayatsue rivers to control river traffic.

Since the Meiji era, the number of ferryboats has increased one after another, and Wakatsu Port1922(Taisho 11), Morotomi Port1923(Taisho 12nd year)Ministry of InteriorIt became a designated port by the decree.AlsoFishing portHas been developed one after another from the immediate upstream of the Chikugo River and Hayatsue River diversion points.Nori,EtsuThere are still 12 fishing ports as fishing bases.

About land transportation1935(Showa10 years)National railwaySaga LineChikugo Okawa StationとMorotomi Station間 にChikugo River Lift BridgeWas completed, and the center of the bridge moved upward when the ship passed.After that, road bridges were built in various parts of the Chikugo River.motorizationThe number increased with development, but on the other handFerryIs left behind by the trends of the times and is being abolished one after another.

In addition, river development such as dams also affected boat transportation, from Hita to Okawa.CedarThe raft that carried the rafts replaced land transportation with the completion of the Yoake Dam.Coupled with the development of land transportation due to the development of national roads, the decline of ferryboats has been spurred.1994(6)Shimoda handing over is abolishedFinally, the ferry in the Chikugo River disappeared.However, in recent years, the momentum for reviewing water transportation has increased, and there are movements to revive the water transportation of the Chikugo River.

On the other hand, since the Meiji era, the construction of bridges on the Chikugo River has become popular.Initially JNRKagoshima Main LineAnd Saga Line,Nishitetsu Tenjin Omuta Line OfRailway bridgeWas built and the road bridge was delayedMiyanojin Bridge 1924It was completed in (Taisho 13).This Miyanojin Bridge1948Until around (Showa 23)Nishitetsu Amagi LineIt was a bridge with a road and railroad shared with.

These bridges constructed in the Meiji and Taisho eras were all replaced for various reasons such as being washed away by floods.As a special one, there is the Chikugo River Lift Bridge mentioned in the previous section on water transportation.1987(62) When the Saga Line was abolished, removal was considered due to the decline in water transportation.However, the survival was decided by the petition of Okawa City and Saga City, and it is now used as a pedestrian bridge where the central part goes up and down eight times a day.

Main bridges in the main stream of Chikugo River

Road bridge

The publication target isNational road,highwayBridge or length 100.0 through whichMetersIt is a bridge that exceeds.Describe from upstream.

BridgeService roadModelLeft bank locationRight bank locationYear of completionRemarks
(Matsubara Dam)National Route 212OitaHita CityAmagasemachi exitAmagasemachi Exit, Hita City, Oita Prefecture1972Shared with the dam
Senjo BridgeNational Route 212girder bridgeHita City, Oita Prefecture Mt. Ooyama Town West Mt. OoyamaHita City, Oita Prefecture Mt. Ooyama Town East Mt. Ooyama1936
Era BridgeNational Route 212Kotohiramachi, Hita City, Oita PrefectureObemachi, Hita City, Oita Prefecture
Omiya OhashiNational Route 210Omiyamachi, Hita City, Oita PrefectureObemachi, Hita City, Oita Prefecture
Mikuma OhashiNational Route 210Truss bridgeTakasehonmachi, Hita City, Oita PrefectureKawaharamachi, Hita City, Oita Prefecture1953
Shimauchi BridgeNational Route 212girder bridgeNakanoshimamachi, Hita City, Oita PrefectureNakazurumachi, Hita City, Oita Prefecture1960
Mikuma BridgePrefectural Road 677girder bridge3-chome, Ishiimachi, Hita City, Oita PrefectureKamegawamachi, Hita City, Oita Prefecture1956
Yomei OhashiNational Route 211Truss / girder compositeTakaimachi, Hita City, Oita PrefectureYoake Nakamachi, Hita City, Oita Prefecture1971
Seki Ohashi
Fukurono Ohashi
National Route 210Yoake, Hita City, Oita PrefectureFukuokaUkiha CityUkihamachi Miharu1993Continuous
Kotobukigirder bridgeUkiha, Fukuoka PrefectureUkiha, Fukuoka Prefecture1955
Showa BridgePrefectural Road 52girder bridgeUkiha, Fukuoka PrefectureFukuokaAsakura CityHakiikeda1928
Haratsuru BridgePrefectural Road 749girder bridgeYoshiimachi Chitose, Ukiha City, Fukuoka PrefectureFukioka Prefecture Asakura City Haki Shinami1959
Megumisoyado BridgePrefectural Road 511Truss bridgeYawata, Yoshii Town, Ukiha City, Fukuoka PrefectureYamada, Asakura City, Fukuoka Prefecture1955
Asahao BridgePrefectural Road 80Yoshii Town Nagasu, Ukiha City, Fukuoka PrefectureTanaka, Asakura City, Fukuoka Prefecture1966
Ryochiku BridgePrefectural Road 33girder bridgeFukuokaKurumeTanushimaru TownBenefitIn Asakura City, Fukuoka Prefecture1955
Chikugogawa BridgePrefectural Road 743Truss / girder compositeSugawara, Tanushimaru Town, Kurume City, Fukuoka PrefectureFukuokaOtoarai TownMorube1931
Oshiro BridgePrefectural Road 81Kurume City, Fukuoka PrefectureKitano TownAyutthayaKitanomachi Oki, Kurume City, Fukuoka Prefecture2007
Prefectural Road 53Gerber Bridge2-chome, Kurume City, Fukuoka PrefectureIshizaki, Kitanomachi, Kurume City, Fukuoka Prefecture1940
National Route 3229-chome, Kurume City, Fukuoka PrefectureOto, Kurume City, Fukuoka Prefecture1988
Kyushu ExpresswayTruss bridge8-chome Higashiaikawa, Kurume City, Fukuoka Prefecture6-chome, Miyanojin, Kurume-shi, Fukuoka1973highwaydesignated
Prefectural Road 88girder bridgeKurume City, Fukuoka Prefecture5-chome, Miyanojin, Kurume-shi, Fukuoka1988at firstAmagi LineShared with
National Route 3Kurume City, Fukuoka PrefectureKurume City, Fukuoka Prefecture(I.e.1 chome1992Ministry of Land, Infrastructure, Transport and TourismDirect control
Higashikushihara Town, Kurume City, Fukuoka Prefecture4-chome, Kurume City, Fukuoka Prefecture2000
Prefectural Road 17girder bridgeKomorinomachi, Kurume City, Fukuoka Prefecture1-chome, Komorino, Kurume-shi, Fukuoka19571953 washed away
Nagato IshibashiPrefectural Road 145Rigid frame bridgeKurume City, Fukuoka PrefectureKurume City, Fukuoka PrefectureNagatoishi1 chome1971
Mamezu BridgeNational Route 264Kurume City, Fukuoka PrefectureSagaMiyaki TownEguchi1993
(Chikugo Oizumi)Takeshima, Kurume City, Fukuoka PrefectureEguchi, Miyaki Town, Saga Prefecture1985Shared with weir management road
Tenkenji BridgePrefectural Road 138Kurume City, Fukuoka PrefectureDaizenjimachiNakatsuSakaguchi, Miyaki Town, Saga Prefecture1999
Shimoda OhashiPrefectural Road 133Kurume City, Fukuoka PrefectureJojima Town浜Shimoda, Jojimamachi, Kurume City, Fukuoka Prefecture1994
Rokugoro BridgePrefectural Road 15Truss bridgeJojima, Jojima Town, Kurume City, Fukuoka PrefectureSagaKanzakiChiyodaYingshima1966
Aoki Nakatsu OhashiNational Route 385Jojimamachi Eshima, Kurume City, Fukuoka PrefectureChiyoda-cho Mukaijima, Kanzaki City, Saga Prefecture1982
Kanegae OhashiPrefectural Road 20FukuokaOkawa CityKanegaeDokaijima, Okawa City, Fukuoka Prefecture1981
Morodomi BridgeNational Route 208Truss bridgeSagaSaga CityMorodomicho Oaza TokutomiMorodomi Town, Saga City, Saga Prefecture1955Completed at the same time as Okawabashi
OkawabashiNational Route 208Truss bridgeMukaijima, Okawa City, Fukuoka PrefectureMorodomi Town, Saga City, Saga Prefecture Oaza Tokutomi1955Completed at the same time as Morotomi Bridge
Chikugo River Lift BridgeTruss bridgeMukaijima, Okawa City, Fukuoka PrefectureMorodomi-cho, Saga City, Saga Prefecture1935oldSaga LineRailway bridge
Pedestrian bridge
Ariake Sea Coast RoadArch bridgeKuami, Okawa City, Fukuoka PrefectureOnoshima, Okawa City, Fukuoka Prefecture2021
Nitta OhashiPrefectural Road 18girder bridgeShinden, Okawa City, Fukuoka PrefectureOnoshima, Okawa City, Fukuoka Prefecture1973The most downstream of the Chikugo River

Railway bridge

BridgerouteModelNearest station on the left bankNearest station on the right bankYear of completionRemarks
JR Kyudai Main Line Railway BridgeJR Kyudai Main LineTruss bridgeChikugo Oishi StationYomei Station1931
Nishitetsu Tenjin Omuta Line Railway BridgeNishitetsu Tenjin Omuta LineKushiwara StationMiyanojin Station1981
JR Kagoshima Main Line Railway BridgeJR Kagoshima Main LineKurume StationHizen-Asahi Station1977
Kyushu Shinkansen Railway BridgeKyushu ShinkansenKurume StationShin-Tosu Station2011

Fishery:

In the main stream and tributaries of the Chikugo RiverFishery:However, mainly in the upstream areaSweetfish,Koi,Crucian carp,HayaInhabit, especially sweetfish fishing is popular.In addition, to a wide area downstream from the Kusu RivereelFishing is also carried out.At the estuaryTidal flatIt has a vast area because the tidal range is up to 6 meters.

On these tidal flatsAriake SeaEndemicMutsugorouStartShiona tribe,Mudskipper,Oyster,Clams,ClamYou can also get abundant shellfish such as.As another endemic speciesEtsuStartSalanx ariaken,YamanokamiEtc. also live.1992From (4)1993In the survey (5), 51 species of fish were confirmed, but2001According to the survey (13), there are 79 species, and the number of species is increasing.But for some fishEndangered speciesSome are designated as.

this house2000Announced in (12)Ministry of the EnvironmentRed listMost inextinctionIs said to be at high riskEndangered Species IAAriakehimeshirauo, Ariakehimeshirauo,Nippon Baratanago,Aphyocypris chinensisBut,Class IBIsTabirakuchiIs specified.Etsu, which is endemic to the Chikugo RiverClass IIIs specified in.

EtsuHerringEyeAnchovyIt is a family fish, and in Japan, it lives almost exclusively in the tidal area of ​​the Ariake Sea and the lower reaches of the Chikugo River.It is prized as a fish specially produced in the Chikugo River, but overfishing has progressed because it is delicious, and1985(Showa 60)Chikugo OizumiThe number has decreased due to changes in habitat due to the completion of the species, and it is on the verge of extinction.In the lower reaches of the Chikugo RiverFishing rightsShimo Chikugo RiverFisheries cooperativeAnd the Ariake Sea Fisheries Cooperative Association responds by releasing fry, but the effect is poor.

In addition, species endemic to the Ariake Sea such as mudhopper and Yamanokami are also designated as Class II.Migratory type as extinctSwordfish,as well asSchistosomiasis japonicumInedible that was artificially extinct as part of the measuresOncomelaniaThere is.

Such a river of the Chikugo RiverEcosystemAnd take charge of river administration for fishery protectionMinistry of Land, Infrastructure, Transport and TourismAt the request of the fishery cooperativedam,Weir OfRiver maintenance dischargeTo protect ecosystems and fishery resources.

Tone River estuary weir(Tone River) AndNagara River mouth weir(Nagara River), Etc., when constructing the Chikugo Oizumi, the Ariake Sea Fisheries Cooperative Association started from the beginning of the plan announcement.Nori・ Develop a strong opposition movement concerned about the serious impact on Etsu fishing.

1979In (54), union members rushed to the planned construction site of Chikugo Oizumi.Japan Water AgencyFor a long time, the people concerned were "canned" in the office and protested.However, even though the construction was approved due to the flooding of the Chikugo River the following year, he requested the public corporation and the Ministry of Construction, which has jurisdiction over it, to take measures to conserve fisheries along the Ariake Sea coast.

The Ministry of Construction (Ministry of Land, Infrastructure, Transport and Tourism) manages in line with the demands of these fishery cooperatives.Matsubara Dam(Chikugo River) ・Shimouke DamWhen there is a request from the fishery cooperative from (Tsu River) during the fishing season for sweetfish and sweetfish, and when there is a possibility of discoloration due to drought.ReleaseThe policy was taken to facilitate the fishing industry and maintain the quality of the seaweed.

In addition to Chikugo Oizumi, this discharge project isKyushu Electric PowerManaged byPower generation damMt. Ooyama River DamYomei Dam(Chikugo River) has also been released in cooperation with the instructions of the Ministry of Land, Infrastructure, Transport and Tourism, and is still being continuously released at the request of the Fisheries Cooperative.

These public-private measures have made it possible to protect the river ecosystem and fishery resources of the Chikugo River.PoachingMeasuresWater pollutionCountermeasures are also an issue, and it is still a long way to recover the population of endangered species.

Ecosystem

About the ecosystem of the Chikugo River basinVegetationas well as the birds-mammalian-Amphibian,昆虫The habitat situation such as "River waterside census, And the data in the "Chikugo River System River Development Basic Policy" are mostly quoted from the "Census".

Regarding vegetation, first of all, the forest area occupies almost half of the area in the water system, but 70percent TheCedarWas the firstConiferous forestIs.Especially SugiHita CityCentered onHita SugiThe sugi that has been cut down is well known in Mibayashi.Edo PeriodIt is transported downstream by more water transportation and is nowOkawa CityIs sent to and is a specialtyClosetIt is still used as a raw material for.

On the other handHardwood forest,Bamboo forestThe area is small and the area is decreasing.Vegetation on the riverbed is mainly in the upper to middle reachesWillowAnd its subspecies are distributed and are exotic in the middle reachesSolidago aureus,RapeseedIs also widely distributed.DownstreamWater extraction plantIsReed,MakomoBut at the estuaryHalophytesIsCarex scabrifoliaEtc. are clustered.In addition, some species such as and are designated as endangered species IB.

Upstream in birdsCrested Kingfisher,Kingfisher,Brown dipperSpecies live along the mountain stream, in the middle classLittle ternAnd so on, and downstream of the countryNatural treasureIsMagpieStartGreat reed warblerEtc. live in it.Sandpiper,Plover,Duck,SeagullMany species inhabit from the middle to the lower reaches.

Of these, endangered species are classified as IALittle curlew, IB classBear hawkとShelduck,Black-winged stiltIs specified, and several types such as little terns are also specified for class II.2000In (12), the number of birds living in the Chikugo River basin was 103.For animals, hang upstream from the middle basinFoxIn addition to living in the upstreamTen,boarIs inhabiting.In amphibiansGiant salamanderAlso inhabits.

Insects in the upper forest areaHirata stag beetleな どbeetleKind,蝶Kind is distributed.I like mountain streamsDragonflyThere are also many.Downstream from the middle streamLocust,テ ン ト ウ ム シ,Stink bugSuch as common insectsArgiope amoenaSuch asク モThere are many kinds.

Insects in the Chikugo River basin2001(13) 1,017 species were confirmed in the survey, and some of them,Eurema laetaEndangered species II, such asWasurena spiderNear-threatened species such as Ya have also been confirmed.

In fish, it is an exotic species of the CyprinidaeSougyo,MagnoliaIs known to be well established.

Scenic spots / sightseeing

There are many scenic spots and sightseeing spots in the Chikugo River basin, but most of them are concentrated in the upper reaches.

The upstream areaAso Kuju National Park,Yaba Mita Hikosan National MonumentThere are many basins that are designated areas of, and it was formed by carving Aso lava and andesite.Kyusuikei(Kusu River) and Tsuetate Valley / Yomei Valley (Chikugo River)ValleyThere is also.In KyusuikeiTop XNUMX waterfalls in JapanHas also been selectedQuake FallsIn addition,2006In (18)Kuju "Dream" Large Suspension BridgeWas completed.For pedestrianssuspension bridgeasIbarakiIt is inRyujin large suspension bridge(Hitachiota City) Is overtaken to become the tallest suspension bridge in Japan, making it a new tourist attraction.

またAutumn leavesIn addition to KyusuikeiBairin LakeとHoneycomb Lake TheArtificial lakeThe contrast between the autumn leaves and the autumn leaves is beautiful, and at Lake BairinWater-busIs also in service.For this reason, when it comes to the seasonNational Route 210,National Route 212 TheTraffic jamWake up.In addition, the Yoake Dam lake on the border between Oita and Fukuoka prefecturesCherry blossomAlso known as a famous place forCanoeIt is also used as a practice area.Ukiha CityToOne hundred famous watersWas chosenKiyomizu springThere is.

In addition, the Chikugo River basinMount AsoErupted due to volcanic activitySpaThere are many hot springs and tourists visit.As the main hot springKurokawa Onsen,Shikade Onsen,Hita Onsen,Harazuru Hot Spring,Chikugogawa OnsenAlong the main stream, along the Kusu RiverAmagase OnsenIt is well known and has many tourists.There are other hot springs of various sizes.The Chikugo River is a specialty that has developed along with these hot springs.Sightseeing boatThere is.

In particular, Hita Onsen, Harazuru Onsen, and Chikugogawa Onsen are known for their history.Azuchi-Momoyama PeriodThe oldest boat is the Mikuma River in Hita City, which is said to have started from the end of the period.Next, Harazuru's boat is old, and Chikugogawa Onsen's boat is the newest.These boats are in the first placeCormorantStarting from May every yearSweetfishAt the same time as the cormorant fishing started in line with the lifting of the ban on fishing, a boat was launched as part of sightseeing.At the three hot springs of Hita, Harazuru, and Chikugo River, there are many in the Chikugo River from late spring to early summer.HouseboatComes to mind, and many tourists seeking coolness board the ship.It is also called "the largest in western Japan" every August.Chikugo River Fireworks Festival KurumeIt will be held in Japan, and nearly 2 fireworks will be launched.

In addition to the scenic spots and hot springs mentioned above, Hita City's tourist destinationsKagien,Takatsuka Atago Jizoson,Kameyama ParkIs in the upper reaches, "Little Kyoto"AkizukiAnd Asakura Triple Water Wheels (Asakura City), Ukiha City's Centennial ParkMino MountainsSpread alongGrapeThe garden is in the middle basin.In Kurume CityBakumatsuToSonnojoi MovementThrow yourself inForbiddenでOwn blade officialYasuomi MakiKurume that producedSuitenggu,Takara Shrine,Ishibashi Cultural CenterThere are cultural facilities such as.

SagaKanzakiとKanzaki DistrictYoshinogari TownOn the border of the Shirohara and Tade riversYoshinogari archeological siteThis area is also crowded with many tourists.As a special productKurume KasuriBesidesKoishiwara ware,Onta ware(Odayaki),Takatori wareCeramics such as, Okawa City chest of drawers,Yame cityCultivated over the Minō MountainsYamechaand so on.

Person related to Chikugo River

flood

footnote

[How to use footnotes]

注 釈

  1. ^ Back thenMinistry of Construction
  2. ^ Sometimes referred to as "Tsukushi Saburo" in the battle for ranking
  3. ^ Ministry of Land, Infrastructure, Transport and Tourism Geospatial Information Authority of Japan Map / Aerial Photo Viewing Service Aerial PhotoCreated based on
  4. ^ The rivers included in the Chikugo River system are generally designated as first-class rivers except for a small part of the river basin.The designated rivers are 140 rivers with a total length of 965.8 kilometers.
  5. ^ this house,Ministry of Land, Infrastructure, Transport and Tourism"Non-designated section" managed byMatsubara DamThanAriake SeaUp to the mouth of the river, the restKumamotoIt is a "designated section" managed by.
  6. ^ The section from the water source to Tahara Bridge is not designated as a first-class river.
  7. ^ Tadamasa TanakaIs innocentReformAfter that, he returned to the old territory of Yanagikawa 11 stones.SekigaharaIt became easy due to the defeat ofDamingIs a rare example of returning to the old territory.
  8. ^ Now mergedSanyo-gun(Miyaki Gun).
  9. ^ Both are the current Miyaki DistrictMiyaki TownA part of
  10. ^ CurrentMinistry of Land, Infrastructure, Transport and TourismKyusyuRegional Development Bureau.
  11. ^ CurrentIndependent administrative agencyWater Resources Organization.
  12. ^ CurrentMinistry of Agriculture.
  13. ^ CurrentMinistry of Economy, Trade and Industry.
  14. ^ 125.0 meters highRock fill damWas planned as, but at the dam construction siteGeologyWas inferior and took measures, but as a result it could not be overcome and was canceled.
  15. ^ CurrentlyPraziquantelThere is a silver bullet.

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References

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