Model AVSWAT apropos of simulating non-point source pollution in Taihu lake basin

文献类型： 外文期刊

第一作者： Zhang, Qiu-Ling

作者： Zhang, Qiu-Ling;Chen, Ying-Xu;Jilani, Ghulam;Shamsi, Imran Haider;Yu, Qiao-Gang

作者机构：

关键词： water quality;runoff;nutrients;sensitivity analysis;calibration;Validation

期刊名称：JOURNAL OF HAZARDOUS MATERIALS （ 影响因子：10.588； 五年影响因子：10.129 ）

ISSN：

年卷期：

页码：

收录情况： SCI

摘要： Accelerated eutrophication and nutrient loads in the lakes are of major concern for human health and environment. This study was undertaken for modeling the non-point source pollution of Taihu lake basin in eastern China. The SWAT model having an interface in ArcView GIS was employed. Model sensitive parameters related to hydrology and water quality were obtained by sensitivity analysis, and then calibrated and validated by comparing model predictions with field data. The GIS showed good potential for parameterization of hill-slopes, channels, and representative slope profiles for SWAT model simulations. In a monthly and daily time step, the model's Nash-Sutcliffe coefficient (E) and the coefficient of determination (R~2) indicated that values of simulated runoff, NH_4~+-N and total phosphorus were acceptably closer to the measured data. Surface water parameters especially CN, Soil-AWC and ESCO were the most sensitive and had more recognition in the model. It is concluded that runoff carrying N and P nutrients from chemical fertilizer inputs in agricultural areas is the major contributor to NPSP in the lake basin. So, decrease in excessive use of N and P fertilizers and their synergism with organic manures is recommended that would significantly reduce nutrient pollution in the lake ecosystem.

分类号： NULL

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