Japan's first rockfill dam is located in the upper reaches of the Isawa River in southwestern Iwate Prefecture. It was completed in 1953 (Showa 28) as part of the Kitakami River Specific Area Development. The dam is 53 meters high, 345 meters long, has a flood area of 1.1 square kilometers, and a maximum output of 28,000 kilowatts. It is a multipurpose dam that serves both flood control, power generation, and agricultural water supply. Since its completion, it has irrigated approximately 60 square kilometers of cultivated land, mainly in the Isawa alluvial fan, and opened up 12 square kilometers of new farmland, making it one of the prefecture's leading rice-producing areas. A prefectural road connects it to Akita Prefecture, and it is included in Kurikoma Quasi-National Park, so tourism development is expected. [Tadashi Kawamoto] Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend |
岩手県南西部、胆沢川(いさわがわ)上流にある国内初のロックフィルダム。北上川特定地域開発の一環として、1953年(昭和28)に完成。ダムの高さ53メートル、長さ345メートル、湛水(たんすい)面積1.1平方キロメートル、最大出力2万8000キロワット。洪水調節、発電、農業水利を兼ねた多目的ダムである。ダム完成以来、胆沢扇状地を中心に約60平方キロメートルの耕地を灌漑(かんがい)し、新たに12平方キロメートルの田畑を開き、県内でも指折りの米どころに発展した。秋田県と結ぶ県道が通じ、栗駒(くりこま)国定公園に含まれ、観光開発が期待されている。 [川本忠平] 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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