Overflow dike
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A levee that is built lower in parts to allow water to overflow from there and keep the river water level constant when the water volume increases temporarily during floods. The purpose is to reduce flood damage in downstream plains. The overflowing water is stored in a temporary reservoir and a flood control reservoir, and is released when the water level drops. → Related topics Embankments | Retention ponds Source : Heibonsha Encyclopedia About MyPedia Information |
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一部を低く造り，洪水時など一時的に流水量が多くなった場合，そこから外部へ越流させ河川水位を一定にする堤防。下流平野部での洪水被害の軽減を目的とする。越流した水は一時貯水池，遊水池にためて，水位低下を待って放流する。 →関連項目堤防｜遊水池 出典 株式会社平凡社百科事典マイペディアについて 情報 |
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