区域地表水面源污染负荷的GIS计算方法研究

以武汉市九峰城市森林保护区为研究区,利用其Arc Hydro Tools工具可以将进行科学划分区域子流域及分水岭,利用其空间分析及属性分析,可精确计算出子流域不同土地类型面积,将城镇区及非城镇区径流污染负荷模型融入分析体系中,分析统计出不同区域、不同流域、不同土地类型的地表径流污染负荷量及总负荷.利用GIS计算方法尝试解决区域面源计算中面积不准确性及参数不合理性问题,已成功运用于武汉市九峰城市森林保护区环境保护规划中,可为区域面源污染估算、水环境管理提供一种新的思路.图3,表4,参9.

The Research on GIS Computing Technology of Regional Surface Non-point Pollution Load

In this paper,the authors we take the Conservation of Urban Forest Site in JiuFeng in Wuhan as the study area.Using Arc Hydro Tools of ArcMap,the drainages and watershed were delineated.The areas of different land type were accurately calculated by utilizing its space analysis and attribute analyses,the surface flow pollution load model of town and country was incorporated in its analyses system,and the pollution load and total load of different land type,different zone and different drainages were statistical analyzed and figured out respectively.Utilizing GIS computing technology,we aim aim to solve two difficulty: the one is area of different zone cannot accurately counted,and the other is whether choice parameter is rationality.This technology had already succeeded in applying to the environmental protection plans of the Conservation of Urban Forest Site in JiuFeng in Wuhan,therefore it can use for reference to non-point pollution estimating and water environmental management.3figs.,4tabs.,9refs.