Uryu River

Japanese: 雨竜川 - うりゅうがわ
Uryu River

It is the first tributary of the Ishikari River system that flows through the central north of Hokkaido. It originates in the Teshio Mountains, flows south in a vertical valley, and enters the northern part of the Ishikari Plain, merging with the Ishikari River west of Fukagawa City. It is 155 km long. The upper river valley is a deep snow area with snowfall of up to 4 meters, comparable to the foot of Mt. Yotei. Because of the large water retention capacity, three dams have been built to hold the water, and artificial lakes, Lake Shumarinai and Lake Utsunaiko, have been created and are used for power generation and irrigation. River terraces have developed in the river valley, forming settlements and farmland. The lower reaches are in the northern part of the Ishikari Plain, and include peatlands such as Chippubetsugenya and Ohogenya, but land improvement has progressed to form a part of a grain-producing region centered on rice paddies.

[Ichiro Kashimura]

Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend

Japanese:

北海道中央北部を流れる石狩川水系第一の支流。源を天塩(てしお)山地に発し、縦谷をなして南下し、石狩平野の北部に出て、深川市の西方で石狩川に合流する。延長155キロメートル。上流の河谷は羊蹄山麓(ようていさんろく)と並ぶ積雪4メートルにも達する深雪地帯で、保水量の多いことから3か所のダム止めをし、人造湖の朱鞠内湖(しゅまりないこ)や宇津内湖(うつないこ)が造成され、発電や灌漑(かんがい)用水に利用される。河谷では河岸段丘が発達して集落や農地をなしている。下流域は石狩平野北部にあたり、秩父別原野(ちっぷべつげんや)、大鳳原野(おおほうげんや)などの泥炭地を含むが、土地改良が進んで水田中心の穀倉地帯の一角を形成する。

[柏村一郎]

出典 小学館 日本大百科全書(ニッポニカ)日本大百科全書(ニッポニカ)について 情報 | 凡例

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