弱透水地质条件下的海绵城市规划建设方法探索

Exploration of Sponge City Planning and Construction under Low Permeability Geological Condition

丹霞地貌地质条件下的城市包气带往往以硬质岩层为主,雨水难以下渗。以鹰潭市中心城区(龙虎山丹霞地貌)为例,通过水面率控制、水系修复、低洼地保护等强调"蓄、净"的方式最大可能地增加弹性调蓄空间,以实现径流的控制与水质的改善,建设高效的海绵城市体系,为该类城市的海绵城市建设提供借鉴。

The vadose zone in Danxia landform is mainly composed of hard rock stratum, and has very low infiltration rate. Taking Yingtan City Center （Longhu Mount Danxia landform） as an example, through the control of the water surface ratio, the restoration of streams and wetlands, the protection of low-lying land, and the implementation of other techniques that emphasis on storage and purification, the flexible storage space was maximized, the goals of runoff control and water quality control were achieved, and an efficient sponge city system was built. This study provided a reference for the sponge city construction in similar cities.