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受城市化快速发展及其内在的土地利用、水系调整、高架桥建设等复杂因素影响,城市降雨、入渗、蒸发、径流及其污染物输移过程已发生很大改变,由此导致的城市内涝与水环境污染等问题已经成为制约当地经济社会可持续发展的重要因素。基于城市雨洪径流传输过程模拟模型SWMM(Storm Water Management Model)对广东省佛山市南海区北村水系雨洪过程进行模拟计算,分析得到不同降雨和土地利用条件下北村水系雨洪可利用量及径流过程、地表污染物入河量及输移过程规律。结果表明,随降雨频率的减小,北村水系主要控制点的径流总量增大,面源污染物总量增大,通过增加城市绿地面积可以有效地减少洪水总量以及消减洪峰流量。
Influenced by the rapid urbanization and its inherent land use, water system adjustment and viaduct construction, urban rainfall, infiltration, evaporation, runoff and the transport of pollutants have undergone great changes. As a result, urban waterlogging Problems with water pollution and other issues have become an important factor restricting the sustainable development of local economy and society. Based on the stormwater management model SWMM (Storm Water Management Model), the rainstorm process of Beicuncian water system in Nanhai District, Foshan City, Guangdong Province, was simulated and calculated. The rainfall availability and runoff under the different rainfall and land use conditions Process, surface pollutants into the river and the law of the process of transport. The results show that with the decrease of the rainfall frequency, the total runoff of the main control points of Beicun water system increases and the total amount of non-point source pollutants increases. By increasing the urban green area, the total amount of floods and the peak flow can be effectively reduced.