Takanosu Basin - Takanosu basin

A fault basin located in the middle reaches of the Yoneshiro River in northern Akita Prefecture. It covers an area of ​​approximately 230 square kilometers. It is surrounded by the mountains of the Dewa Mountains, and the Ani River flows along the western edge of the basin. The floor of the basin is approximately 30 meters above sea level in the east and 19 meters above sea level in the west. The areas along the Yoneshiro River and the Ani River consist of alluvial lowlands and river terraces. Most of the river terrace surfaces are covered by pumiceous volcanic ash layers, which are the product of the Towada Volcano. In the southern part of the basin is a diluvial plateau called Onodai. Due to a lack of irrigation water and acidic soil, the area was grassland and forest land for many years, but since 1937 (Showa 12), prefecture-run reclamation has been carried out and settlements have developed, and after World War II, settlement villages were built. The Prefectural Onodai Agricultural College (which became the Prefectural Agricultural College in 1978, but was abolished in 1997) was also established, and efforts were made to foster mid-level farmers. The center of the basin is around Takanosu in Kitaakita City.

[Reijiro Miyazaki]

Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend

秋田県北部、米代川(よねしろがわ)の中流に位置する断層盆地。面積約230平方キロメートル。周囲を出羽(でわ)山地の山々に囲まれ、盆地の西端を阿仁川(あにがわ)が流れる。盆地床は東部で標高約30メートル、西部では19メートルである。米代川と阿仁川沿いは沖積低地と河岸段丘からなる。河岸段丘面の多くは十和田火山の噴出物である軽石質火山灰層によって覆われている。盆地の南部には大野台とよばれる洪積台地がある。灌漑(かんがい)用水の不足と酸性土壌のため、長年草地、林地であったが、1937年（昭和12）以来県営開墾が行われ集落も発生し、第二次世界大戦後は入植村が建設された。また県立大野台高等農業学園（1978年県立営農大学校になるが、1997年廃止）も設置され、中堅農民の育成に努力した。盆地の中心は北秋田市鷹巣周辺。

［宮崎禮次郎］

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