Abstract:

In order to understand the ecological problems in Wanquan River watershed, the author selected 5 ecological sensitive evaluation factors, including slope degree, elevation, soil type, water buffer and land use type to analyze ecological sensitivity comprehensively based on GIS, using the survey material and related research data. The results indicated: (1) low sensitive areas (38.69%)>non-sensitive areas (26.7%)>moderately sensitive areas (22.84%)>highly sensitive areas (8.38%)>extremely sensitive areas (3.39%); (2) The extremely sensitive areas were mainly distributed the upper reaches of catchment, the highly sensitive areas were scattered the all the watershed, moderately sensitive areas were mainly distributed the upper-middle reaches, the low sensitive and non-sensitive areas were concentrated in the lower-middle reaches of watershed. This demonstrated that the spatial distribution of ecological sensitivity of Wanquan River basin was significantly different, the ecological sensitivity was low, the ecological environment had good condition.