环巢湖流域典型圩区水环境模拟与污染控制研究

Study on Water Environment Simulation and Pollution Control in Typical Polder Areas Around Chaohu Lake Basin

为降低杨柳圩对周边水体生态环境的影响,通过构建圩区SWAT模型模拟并分析圩区污染负荷特性,对拟采取的工程措施进行模型表达,评估了减排水效果和水环境控制效果。结果表明,SWAT模型在环巢湖流域典型圩区具备较好的适用性;农业面源是典型圩区的主要污染源,其污染负荷与径流量呈正相关;拟采取的工程措施可使泵站年排水量降低50.27%,NH-N、TP年排放量分别降低59.23%、50.00%,且排水水质(除部分枯水期外)基本达到地表水Ⅲ类标准。研究成果可为环巢湖流域圩区的水环境治理提供参考。

In order to reduce the impact of Yangliu polder on the ecological environment of surrounding water bodies,the SWAT model of polder was constructed to simulate and analyze the pollution load characteristics.The proposed engineering measures were modeled to evaluate the effect of water cycle and water environment control.The results show that the SWAT model has good performance in the typical polder areas around Chaohu Lake Basin.Agricultural non-point source is the main pollution source in the polder,and the pollution load is positively correlated with the runoff.The engineering measures to be taken can reduce the annual discharge of the pump station by 50.27%,the annual discharge of NH-N and TP by 59.23%and 50.00%,respectively,and the quality of the discharged water basically reaches classⅢof surface water except for some dry seasons.The research results can provide reference for water environment control in polders around Chaohu Lake Basin.