Simulating the Impact of Flooding Events on Non-point Source Pollution and the Effects of Filter Strips
There has been increasing concern regarding surface water quality worldwide, and many countermeasures have been implemented to mitigate the deterioration of surface water quality. Non-point source pollution (NPSP) has become the critical source of pollution after years of management of point source pollution. Moreover, the impact of NPSP on surface water quality is significantly affected by extreme events, especially flooding events. In this study, the SWAT model was used to characterize the Zhengshui River to investigate the flood process and the impact of flooding events on NPSP and surface water quality. Results showed that a one-day flooding event caused by extreme storm rainfall on August 22, 2007 and a flooding event from August 22 to August 31, 2007 contributed about 40% and 60% of the annual sediment and nutrient yields in 2007, respectively, highlighting the significant effect on water quality. Furthermore, assessment of the effects of constructing filter strips of different widths on pollution revealed that they obviously improved water quality. However, much wider filter strips are needed during flooding events. These findings indicate that greater attention should be given to assessment of the impact of flooding events on water quality and pollution loads, and that studies should also focus on management practices.
Extreme Simulation modelling Pollution River
Y.Chen Z.Zhang
State Key Laboratory of Earth Surface Processes and Resource Ecology / Academy of Disaster Reduction and Emergency Management, Beijing Normal University, Beijing 100875, China
国际会议
The 3rd Biennial ISRS Symposium Achieving Healthy and Viable Rivers (ISRS)第3届国际河流大会
北京
英文
398-405
2013-08-05（万方平台首次上网日期，不代表论文的发表时间）