1. Chouseiike
Wikipedia definition
2. Retention basinA retention basin is used to manage stormwater runoff to prevent flooding and downstream erosion, and improve water quality in an adjacent river, stream, lake or bay. Sometimes called a wet pond, wet detention basin or lake fail, it is an artificial lake with vegetation around the perimeter, and includes a permanent pool of water in its design.
Read “Retention basin” on English Wikipedia
Read “調整池” on Japanese Wikipedia
Read “Retention basin” on DBpedia


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