上谷沼調節池, Retention basin in Kawaguchi, Japan.
The Kamiyanumacho Retention Basin spans across an area in Kawaguchi City, maintaining a permanent water level to manage surface runoff and prevent flooding.
The basin was constructed following repeated flooding of the Fujemon River during the post-war urbanization of Urawa and Kawaguchi regions.
The original Kamiya Marsh area was known for its eel production before being transformed into a water management facility.
The basin features a storage capacity of 450,000 cubic meters, with plans to expand to 720,000 cubic meters upon completion of the right bank.
The southern section of the basin serves as the Kawaguchi City Kamiyanumacho Sports Ground, which submerges during high water periods.
GPS coordinates: 35.84828,139.68419
Latest update: March 9, 2025 12:17
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