The Research on Sponge City Construction in Southern Hilly Area——A Case Study of Ningxiang County in Hunan Province
以宁乡县为例，分析了南方多雨地区海绵城市的规划与建设方案，发现通过透水路面、生态水网等措施可增强城市排水系统、减少径流峰值，为工程措施之外的规划思路提供参考。
Rapid urbanization and rainstorm lead to problems such as waterlogging in many cities, which forces them to explore sponge city construction. This paper reviewed the theories and practices of the sponge city construction at home and abroad, and by taking Ningxiang County's sponge city planning and construction as the case, empirically analyzed the ideas and plans of the sponge city construction in southern rainy areas. The research shows that according to Sponge City Theory, Ningxiang has changed a lot after the project. Via features of road permeable characteristic and road chosen by level discrepancy, the county itself has improved a lot in the aspect of ecological water network. Also, the city's natural drainage system has been strengthened. Comprehensive dealing method of making the hard ground more like the sponge strengthens the water circulation on the surface of urban areas, increases the amount of rainwater which would permeate into the ground, decreases the rainfall runoff peak amount and reduces the pressure of urban drainage system.Based on the case study, the suggestion is put forward on pre- planning, economic regulation, system improvement and public participation with the expectation of reducing dependence on the current way of engineering measures and providing a new idea of planning measures which is forward-looking as well.