Distributed Simulation of Non-Point Source Pollution in Ashi River Basin

作     者：Fang Ma Xiaofeng Jiang Li Wang Zhe Li Xiongwei Liang 

作者机构：State Key Laboratory of Urban Water Resource and EnvironmentHarbin Institute of Technology HIT Yixing Academy of Environmental Protection 

出 版 物：《Journal of Harbin Institute of Technology(New Series)》 (哈尔滨工业大学学报（英文版）)

年 卷 期：2015年第22卷第3期

页      面：31-39页

核心收录：

学科分类：0810[工学-信息与通信工程] 08[工学] 0815[工学-水利工程] 0805[工学-材料科学与工程（可授工学、理学学位）] 0812[工学-计算机科学与技术（可授工学、理学学位）] 

基　　金：Sponsored by the National Natural Science Foundation of China(Grant No.51179041) the Major Science and Technology Program for Water Pollution Control and Treatment(Grant No.2013ZX07201007) Natural Science Foundation of Heilongjiang Province,China(Grant No.E201206) Special Fund for Science and Technology Innovation of Harbin(Grant No.2012RFLXS026) the State Key Lab of Urban Water Resource and Environment(Harbin Institute of Technology)(Grant No.2014TS05) 

主　　题：SWAT model non-point source nitrogen phosphorus Ashi River Basin 

摘      要：In order to get a thorough understanding of non-point source pollution,it is essential to examine its temporal and spatial distribution. A physically-based distributed model,Soil and Water Assessment Tool( SWAT),was used in this research,to quantitatively estimate the NPS load and analyze the temporal and spatial distributions of NPS pollution in Ashi River Basin. The results indicated that SWAT was suitable to simulate stream-flow and water quality in Ashi River Basin. Total Nitrogen which was contributed by NPS( NPS-TN) accounted for 32. 47%-62. 61%,and Total Phosphorus which was contributed by NPS( NPS-TP)accounted for 22. 30%- 57. 85% of the total load respectively. In inter-annual timescale,both NPS-TN and NPS-TP were influenced by stream-flow and fertilizer. However,when compared with fertilizer,NPS pollution was more directly affected by stream-flow. In annual timescale,NPS-TN and NPS-TP mainly occurred in flood season( from May to September). In the aspect of space,spatial differences of NPS-TN and NPS-TP were extremely significant. The spatial variations of NPS pollution were mainly influenced by land use,precipitation,soil and slope.