滇池流域土地利用变化与入湖河流水质关系研究

Impact of Land Use Change on Inflowing Water Quality in Dianchi Lake Catchment

以昆明滇池东南岸流域为例,利用逐步回归模型分析了流域土地利用类型与流域湖泊水质之间的相关关系,发现水质污染指标与耕地始终呈现正相关,与林地始终呈现负相关,与城乡用地始终呈现负相关,对昆明滇池东南岸流域而言,耕地是入湖河流水质污染的主要来源,其污染贡献掩盖了城乡用地的贡献。

Taking the south-east Dianehi Lake Catchment as an example, the correlation between the land use type and lake water quality is analyzed by the stepwise regression model. It is found that the water quality pollution in- dex and the farmland are always in a positive correlation, while it is an opposite situation for the forested land and urban land. Therefore the farmland is a major pollution source for the water quality of the inflowing rivers in the re- search area, also with an overriding pollution contribution.