%0 Journal Article
%A TONG Xiao-xia
%A CUI Yuan-lai
%A ZHAO Shu-jun
%A ZHANG Ping-cang
%T Simulation on Variation Regularity of Agricultural Non-point Source Pollution by Modified SWAT Model:A Case Study of Fangxi Lake Small Watershed of Ganfu Plain Irrigation District
%D 2015
%R 10.3969/j.issn.1001-5485.2015.03.018
%J Journal of Yangtze River Scientific Research Institute
%P 89-94
%V 32
%N 3
%X <p>The modified SWAT model is applied to simulate nitrogen and phosphorus migration and spatial distribution for Fangxi Lake watershed in Ganfu Plain Irrigation District of Poyang Lake Basin in different rainfall events of typical hydrological year. Results show that rainfall is the main driving force of nitrogen and phosphorus losses. Nitrogen and phosphorus losses fluctuate with rainfall event, and their peak values almost synchronously occurr. Therefore, it is very important to optimize the farming management methods in flood season to control non-point source pollution, and to improve the application rate of fertilizer. The spatial distribution of nitrogen and phosphorus losses has much differences, nitrogen and phosphorus losses are higher in the upstream than in the downstream of the study area. Therefore, the spatial distribution of non-point source pollution can be appropriately considered in pollution prevention and control, and ecological restoration techniques as ecological ditches and wetlands applied along the water pathway can be considered to purify and dilute the pollutants.</p>
%U http://ckyyb.crsri.cn/EN/10.3969/j.issn.1001-5485.2015.03.018