Construction Of SWMM Model Of Southeast Bank Of Dianchi Lake Basin Based On GIS Technology

This article constructs SWMM model as the main line on the premise of the threat of nonpoint source pollution load to the environment to get the analog data for the study of effectiveness analysis on the project of intercepting wastewater around Dianchi lake. It makes use of SWMM model simulation method on technical support of GIS software to simulate the nonpoint source pollution load in the east and south in dianchi lake watershed. According to the actual data of the study area and the experience of domestic and foreign relevant research parameters determine the model parameters for checking and rating to implement the operation of the model.East and south of the dianchi lake watershed is analyzed for getting runoff and various pollutants of all the drainage units as well as discharge sewage and pollutants of the system in wet year, dry year and normal year.The analog results under different rainfall conditions are compared by designing different regime of rainfall to get the analog data of the runoff, pollution load, the changes of water quality and so on. The analog data provides a reference for related works, such as the efficiency analysis of the project of intercepting wastewater around dianchi lake,non-point source pollution control and so on.Meanwhile,it has very important predictive value for the work of nonpoint source pollution load control.