Tokachi River

Japanese: 十勝川 - とかちがわ

This river originates on the southeastern slope of Mt. Tokachi in southeastern Hokkaido, flows through the Tokachi Plain near Kutari, Shintoku Town, Tokachi General Subprefectural Bureau, and empties into the Pacific Ocean. It is 156 km long and is the third longest river in Hokkaido. It flows almost south until Mikage, Shimizu Town, then heads east and turns southeast at Toshibetsu, Ikeda Town. Its main tributaries are the Tobetsu River, Otofuke River, and Satsunai River. Since the river is extremely turbulent in the middle and lower reaches and causes floods, flood control work began in 1923, including excavation of a new waterway, embankment construction, and revetments. As a result, the river channel between Chiyoda, Ikeda Town and Moiwa, Toyokoro Town, became the Tokachi River with the new waterway in 1937. The river downstream of Moiwa was once called the Otsu River, but it is the main stream of the Tokachi River. In the upper reaches, there are the Iwamatsu and Kamiiwamatsu power stations (total of 32,600 kW), and the Tomura power station (40,000 kW). The Tokachi Plain in the middle and lower reaches is a field crop and dairy farming region. There is a salmon and trout hatchery in Makubetsu Town. Until the completion of the Kushiro-Obihiro railway in 1905, the river was used for water transportation.

Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information

Japanese:

北海道南東部，十勝岳南東斜面に源を発し，十勝総合振興局新得町屈足（くったり）付近から十勝平野を流れて，太平洋に注ぐ川。全長 156km。北海道第3の長流。清水町御影までほぼ南流，ここから東へ向かい，池田町利別（としべつ）で南東に転じる。おもな支流は利別川，音更川，札内川。中流以下では著しく乱流して洪水が発生するため，1923年治水工事に着手，新水路の掘削と，築堤，護岸などの事業が行なわれた。この結果，池田町千代田－豊頃町茂岩間の河道は，1937年新水路の十勝川となった。茂岩より下流はかつて大津川とも呼ばれたが，十勝川の本流である。上流には岩松発電所，上岩松発電所（計 3万2600kW）をはじめ，富村発電所（とむらはつでんしょ。4万kW）などがあり，中流・下流域の十勝平野は畑作，酪農地域。幕別町にサケ，マスの孵化場がある。1905年釧路－帯広間の鉄道が全通するまでは，水運に利用された。

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