GIS在九龙江流域农业非点源污染信息数据库建立中的应用——以五川小流域为例

Application of GIS to Establish the Database of AgriculturalNon-point Source Pollution in Jiulong River WatershedTaking Wuchuan Subwatershed as a Case Study

运用GIS软件MapInfo、ARC/INFO工作站和ArcView3.2建立五川小流域的农业非点源污染信息数据库,包括小流域边界、水系、土地利用现状图及地形图等.利用五川小流域等高线、高程点制作TIN,建立流域数字高程模型(DEM),并在DEM的基础上进行表面分析,提取坡度、坡向、坡长等.运用ArcView的水文分析模块模拟流域的地表水网分布、水网密度.为五川流域农业非点源污染模拟研究提供了基础数据平台,为九龙江流域农业非点源污染研究提供经验借鉴.

MapInfo, ARC/INFO workstation and GIS ArcView were used to establish agricultural non-point source pollution database in Wuchuan watershed, including boundary, landuse current position,water system, topography, etc. The digital elevation mode(DEM) was also generated. On the basis of DEM, surface analysis was carried on. As a result, the aspect and slope in wuchuan watershed were extracted. In addition, the spatial analysis model-Hydrology Function in ArcView are employed to model flow direction, flow accumulation and flow network based upon DEM. This work was expected to provide a fundamental data supply for the further research of agricultural nonpoint source pollution in Jiulong river watershed.