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遊水地 (yuusuichi) Japanese meaning: retarding basin | Kotomora
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ためる
役やく
割わり
を
し
て
いる
。
This retarding basin temporarily stores river water during heavy rain.
The city built a new flood-control pond as a flood countermeasure.
Related words 調ちょう 整せい 池ち 調整池 is a broader term for a regulating reservoir, often used for water supply or irrigation, while 遊水地 specifically refers to a basin for flood control.
ため 池いけ ため池 is a traditional irrigation pond for farming, not primarily for flood prevention.
Written forms 遊ゆう 水すい 地ち
Standard kanji spelling for a flood-control pond or retarding basin.
遊ゆう 水すい 池ち
Variant kanji spelling using 池 (pond) instead of 地 (land/area); both are used in official contexts.
Etymology Compound of 遊 (play, idle) + 水 (water) + 地 (land), literally 'idle water land,' referring to land that temporarily holds excess water.
