In Japan, which is faced with the possibility that after global warming its cities will become swamped, in recent years there has been a trend toward "comprehensive water management policies." These include tearing up the concrete in sports fields, parks, and plazas, turning them instead into flood diversion areas for the rainy season.
在日本，為因應暖化後頻頻的洪災形成一個個都會水鄉澤國，近年來的「綜合治水對策」，乾脆拆掉運動場、公園、廣場的水泥，規劃成一個個雨季時的貯洪區。