海绵城市年径流总量控制率在控规中的深化与落实

Deepening and Implementing of Capture Ratio of Annual Rainfall Runoff Volume of Sponge City in Regulatory Detailed Planning

随着海绵城市建设工作在全国各地的大力推进,规划方案的科学合理与切实可行愈加重要。海绵城市专项规划一般只对总体目标、管控单元划分以及单元规划目标等内容提出明确要求,作为海绵城市规划管控的刚性控制指标,年径流总量控制率在控规层面的分解工作始终是规划师、规划与建设主管部门关注的重点与难点,由于目前尚未形成统一标准与方法,指标分解过程缺乏科学合理性。针对海绵城市在控规层面推进中存在的主要问题,提出了一套指标分解的思路与技术方法,通过现状评估、分解指标与模型校验三阶段完成控规层面年径流总量控制率的确定,并在理论论述的基础上,通过实际案例对指标分解过程加以详尽说明。

With the vigorous promotion of sponge city around of China, the scientific rationality and practical feasibility of planning scheme became more and more important. The general target, control unit division, unit planning target, and so on, usually have been clearly put forward in the special plan- ning of sponge city. However, the capture ratio of annual rainfall runoff volume in regulatory detailed planning, as the rigid control index of sponge city planning and control, has always been the focus and difficulty of the planners, planning and construction departments. Because of no uniform standards and methods, there was no scientific rationality in index decomposition process. Aiming at the main problems in the promotion of sponge city in regulatory detailed planning, a set of ideas and technical methods were put forward for index decomposition. So the capture ratio of annual rainfall runoff volume could be deter- mined through three phases of status evaluation, index decomposition and model verification. On the ba- sis of theoretical discussion, an actual case of index decomposition was described in detail.