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应用SUSTAIN软件,以嘉兴市晴湾佳苑居民小区A、B期为研究对象,针对开发前、建成未实施LID和建成实施LID三种情景,进行雨水径流量和主要污染物模拟,以评估LID对径流污染的控制能力。结果表明,与建成未实施LID措施情景相比,建成实施LID措施情景可以削减39.7%的年径流量和35.6%的峰值流量,对TN、TP、COD和TSS污染负荷的削减率分别可以达到51.7%、55.3%、52.2%和58.7%,是最具成本—效益的方案之一。提出了SUSTAIN在我国应用的建模方法,然而因其基础数据需求量大、数据精度要求高、参数众多且操作过程较为复杂,推广实用性受到一定限制,因此亟需建立并开放我国高精度土地利用、土壤水文、监测断面水量水质和LID成本数据库。
Using SUSTAIN software, taking A and B phases of residential quarters of Qingwan Jiayuan Residential Area of Jiaxing City as the research object, three scenarios of LID not implemented and LID completed before implementation were conducted to simulate rainfall runoff and main pollutants to evaluate LID Control of runoff pollution. The results show that compared with the scenario without LID, the implementation of LID measures can reduce annual runoff by 39.7% and peak flow by 35.6%, and reduce the pollution load on TN, TP, COD and TSS respectively by 51.7% %, 55.3%, 52.2% and 58.7% are among the most cost-effective options. The modeling method of SUSTAIN in our country is put forward. However, due to the demand of basic data, high precision of data, many parameters and complicated operation, the practicality of popularization is restricted. Therefore, it is urgent to establish and open the high precision land Utilization, Soil Hydrology, Monitoring Sections Water Quality and LID Costs Database.