基于水力模拟的排涝泵站设计规模复核评估

Validation and Evaluation of Design Scale for Drainage Pumping Station Based on Hydraulic Simulation

排涝泵站作为城市防涝体系的重要环节,其设计规模是否满足实际需求,将直接影响城市内涝现象严重与否。以中山市中心城区为研究区域,通过水力模拟计算P=0.25、0.5、1、2、3、5、10、20、30、50、100 a这11种工况,对区域内的排涝泵站规模进行复核评估。计算结果显示,该区域4座排涝泵站整体规模缺口为22.04 m^(3)/s,不足比例达40.81%;若泵站规模扩容至满足P=5 a排涝需求,该区域轻度内涝面积可减少24.1%,重度内涝面积可减少25%。

As an important part of urban waterlogging prevention system,whether the scale of drainage pumping stations can meet actual demand or cannot directly affect the waterlogging severity.Taking the city center of Zhongshan as the research area,the scale of drainage pumping stations in the area was validated by hydraulic simulations with P=0.25,0.5,1,2,3,5,10,20,30,50 a and 100 a.Results showed that the overall scale gap of four drainage pumping stations in this area was 22.04 m^(3)/s,and insufficient proportion was 40.81%.If the scale of drainage pumping stations was expanded to meet the drainage demand of P=5 a,mild waterlogging area could be reduced by 24.1%,and severe waterlogging area could be reduced by 25%.