利用地理信息系统 (GIS) ,基于数字高程模型 (DEM) ,提取AGNPS(AAgriculturalNon PointSourceModel)模型所需的水文和地形参数 ,并通过实地调查及专题制图等手段获取AGNPS模型所需的土地利用、土壤质地及施肥水平等其它参数 ,最后利用监测降水 ,实测水文参数、营养盐及沉积物负荷等验证AGNPS模型在我国东南亚热带地区的应用 .It is feasible to evaluate the Non-point Source pollution such as sediments, agricultural chemicals using water quality model in the basin scale. AGNPS (Agricultural Non Point Source), an event driven, distributed parameter model, which is developed and validated primarily in the United States, was employed in the landscape of Jiulong River watershed. The hydrologic and topographic parameters of AGNPS model were extracted based on DEM (Digital Elevation Model) built in GIS (Geographic Information System). The erosion and nutrients transport modules of AGNPS were tested and validated in Jiulong River watershed based on measurements and other data during the main crop growing season.教育部博士点基金 (19990 38411) ;; 福建省自然科学基金 (D0 110 0 0 3
