美国:就地滞洪蓄水美国的雨水利用常以提高天然入渗能力为目的。在芝加哥市兴建了地下隧道蓄水系统,以解决城市防洪和雨水利用问题。其他很多城市还建立了屋顶蓄水和由入渗池、井、草地、透水地面组成的地表回灌系统。美国不但重视工程措施,而且还制定了相应的法律法规对雨水利用给予支持。如科罗拉多州、佛罗里达州和宾夕法尼亚州分别制定了《雨水利用条例》。这些条例规定新开发区的暴雨 US: Flood Detention in Place The use of rainwater in the United States is often aimed at increasing natural infiltration capacity. An underground tunnel water storage system was built in Chicago to address urban flood and stormwater use issues. Many other cities have also established roof storage and surface recharge systems consisting of infiltration ponds, wells, grasslands and permeable ground. The United States not only attaches importance to engineering measures, but also has formulated corresponding laws and regulations to support rainwater utilization. Such as Colorado, Florida and Pennsylvania, respectively, the “rainwater utilization regulations.” These regulations provide for heavy rains in new developments