Takase River (Aomori)

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Takase River
高瀬川
Paddy fields in Aomori Prefecture (3646592676).jpg
A view of paddy fields and Takase River in the border between Tohoku and Shichinohe
Native nameTakasegawa (Japanese)
Location
Country Japan
Prefecture Aomori
Physical characteristics
Mouth Pacific Ocean
  coordinates
40°53′10″N141°23′34″E / 40.8860°N 141.3928°E / 40.8860; 141.3928
Length64 kilometres (40 mi)
Basin size867 square kilometres (335 sq mi)

The Takase River (高瀬川, Takasegawa) is a Class A river system that flows through Aomori Prefecture, Japan. It flows from Mt. Yahata, through Lake Ogawara into the Pacific Ocean. [1] [2]

Contents

The river is very important to the economy of the region. [1] Approximately 80,000 people live in the river's catchment area. [1]

Every July, the annual Lake Festival (湖水まつり, Kosui-matsuri) is held along the banks of the Takase River. [3] The Takase River Office uses the opportunity to exhibit the "creatures that live in Lake Ogawara", which is popular with families. [3] They also raise awareness about flood control, and water quality improvement of the lake.

In Japanese, takase means "shallow river". [2]

Geography

The river has a length of 64 kilometres (40 mi) and a catchment area of 867 square kilometres (335 sq mi). [1] [4] [5] The basin area contains 2 cities, 4 towns, and 1 village. [5]

Upstream from Lake Ogawara, the slope of the river ranges between 1:50 and 1:2000. [5] Between the river and the Pacific Ocean, the slope is 1:30000 (almost horizontal). [5] The water flows backwards from the sea into Lake Ogawara, causing it to be slightly brackish. [5]

Environment

Many species live in the Takase River system, such as river lamprey, killifish, and japanese smelt. Lake Ogawara, located downstream, contains many brackish and freshwater aquatic plants like Braun's stonewort, and Ruppia maritima. [6] Freshwater clams can also be found in the area. [6]

Lake Ogawara is designated as one of Japan's 500 Important Wetlands by the Ministry of the Environment. [6] [5]

Flooding

Since the Shōwa era, eight major floods have been observed. [7] The most recent was in 2007. [7]

YearCause of floodAffected communitiesDamage
1958 Typhoon Ida Towada, Misawa, Shichinohe, Kamikitachō3 dead or missing, 17 injured, 151 buildings destroyed, 2,801 buildings flooded
1965 1965 Pacific typhoon season Towada, Misawa, Kamikitachō, Tōhoku 85 buildings partially damaged, 57 buildings flooded
1968 Cyclone Tōhoku106 buildings partially damaged, 93 buildings flooded
1990CycloneKamikitachō, Rokkasho 1 building partially damaged, 239 buildings flooded
1994Weather frontMisawa, Kamikitachō88 buildings flooded
1998CycloneKamikitachō, Tenmabayashi 12 buildings flooded
2006CycloneTōhoku9 buildings flooded
2007CycloneTōhoku3 buildings flooded

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References

  1. 1 2 3 4 "日本の川 - 東北 - 高瀬川 - 国土交通省水管理・国土保全局". www.mlit.go.jp. Retrieved 2024-03-03.
  2. 1 2 "日本の川 - 東北 - 高瀬川 - 国土交通省水管理・国土保全局". www.mlit.go.jp. Retrieved 2024-03-03.
  3. 1 2 "日本の川 - 東北 - 高瀬川 - 国土交通省水管理・国土保全局". www.mlit.go.jp. Retrieved 2024-03-03.
  4. http://wanokawa.sakura.ne.jp/html/wanokawa/110705mizuki3.pdf
  5. 1 2 3 4 5 6 https://www.pref.aomori.lg.jp/soshiki/kankyo/kankyo/files/plan07.pdf
  6. 1 2 3 "日本の川 - 東北 - 高瀬川 - 国土交通省水管理・国土保全局". www.mlit.go.jp. Retrieved 2024-03-03.
  7. 1 2 "日本の川 - 東北 - 高瀬川 - 国土交通省水管理・国土保全局". www.mlit.go.jp. Retrieved 2024-03-03.