A study on the actual situation of sponge city construction policy in various provinces and cities in China

Abstract

： This research is aimed at the construction of “Sponge City”, which is solving China’s water environment problems, so that the policies and the actural situation in applicable methods of 30 pilot cities could be clarified. Collecting the City Construction Technical Guidelines of Sponge City by each ministry and city a literature survey and an interview survey were conducted. First, the utilization rates of the applied methods described in the guidelines were calculated and categorized and discussed according to the different natural and social conditions in which each city is distributed. Among the 22 applicable methods, six were most commonly used in each city: pervious pavement, sunken greenbelt, rain garden, bioretention cell, stormwater wetland and grass swale. These six methods, are most adopted in each city. The construction of sponge cities varied in construction measures and application methods depending on the regional climate. In the northern region, the emphasis was placed on measures of infiltration, storage, purification and use of rainwater, while in the northwest region, water storage and urban water replenishment were used, etc. On the other hand, no clear differences were found in application methods depending on the size of the cities.