海绵城市并不是单纯的改造或取代传统排水系统,而是对传统排水系统的一种“减负”和补充,最大程度地发挥城市本身的作用。城市“海绵体”既包括河、湖、池塘等水系,也包括绿地、花园、可渗透路面这样的城市配套设施。雨水通过这些“海绵体”下渗、滞蓄、净化、回用,最后剩余部分径流通过管网、泵站外排。 Sponge city is not simply to transform or replace the traditional drainage system, but rather to the traditional drainage system, a “burden” and complement, to maximize the role of the city itself. City “sponge ” includes both river, lake, ponds and other water systems, but also includes green space, gardens, permeable pavement such ancillary facilities. Rainwater through these “sponge” infiltration, stagnation, purification, reuse, the last remaining part of the runoff through the pipe network, pumping station efflux.