中文摘要：

农业非点源污染具有广泛性、随机性和难监测性、难治理性等特点,应用模型描述农业非点源污染物输移过程、进行污染负荷计算、评价防控与治理效果成为水环境保护与治理领域的难点与热点。着重讨论农业非点源污染模型（AGNPS）系列模型的结构、机理以及国内外的研究与应用进展。国内外该模型研究结果表明,模拟结果可以接受,年模拟效果要好于次降雨模拟效果,径流量、泥沙侵蚀量、氮磷营养盐负荷模拟精度根据研究区域的不同有所差异,模型的管理措施效果评价、关键污染源区的判断与实际相符。AGNPS系列模型单元网格的划分、敏感性分析及参数的调整对模型的精度有重要影响,针对该模型的特点与研究现状,提出改进意见及研究展望。

英文摘要：

The Agricultural Non-Point Souree（AGNPS） pollution is widespread, random, and difficult to monitor and treat. It has been the focusing issue that models can be used to describe the transportation process, to calculate the pollutant load and to assess mitigation measures for AGNPS pollution in the field of the water environmental protection and treatment. This paper reviewed the research and application of the AGNPS model both at home and abroad, and describes the structure and mecha- nism. The results show that AGNPS model is acceptable. The simulation results in the hydrological years are better than those in the rainfall-runoff events. The simulation accuracies in runoff, sediment erosion, nitrogen and phosphorus load are different in the different research zones. It is realistic to assess the effect of the management measures and judge the critical zone. The grid-cell division, the sensitivity analysis and the parameters adjustment affect the model＇ s accuracy to a larger extent. In view of the feature and the research status of AGNPS, the expectation and modification is put forward.