海绵城市实施途径及规划应对策略研究——以宁波市为例

Study of Implementation Approach and Measures for Urban Planning of the Sponge City: A Case Study of Ningbo

建设海绵城市的最终目标是为城市构建起可持续、健康的水循环系统,每个城市的工作重点各不相同。结合城市的自然地理环境,宁波需要在建设源头低影响开发雨水系统、构建以水系为主体的城市排蓄大系统和最大限度地保护水生态体系3方面开展工作,提出了综合径流系数、低影响开发控制指标、平原河网水面率和单位建设用地调蓄量4个覆盖源头到终端的规划控制指标,并对低影响开发、水域保护及城市调蓄系统建设的规划管控方案进行了设计。

The ultimate purpose for the construction of the sponge city is to buid up a water circulation system in city which is sustainable and healthy. However, each city has its own focuses. Based on the physic-geographical environment and the urbanization process of Ningbo, there are three aspects including construction of low impact development rain water system, building large urban drainage and storage system which is mainly depended on river system and providing maximum protection for the water ecological system. This paper introduces four planning control indicators covering the whole process including comprehensive runoff coefficient, low impact development control indexes, water surface ratio of plain river network and flood storage capacity of construction land unit. Additionally, design for planning and management schemes of these indicators is proposed in this paper.