关键词: 生态敏感性, 溪洛渡镇, ArcGIS, AHP

Abstract: Xiluodu town was taken as the research object, combining with the related research status, field survey and vector data at home and abroad, seven evaluation indexes were selected as the evaluation mechanism, including altitude, plant canopy density, soil erosion, land type, slope, slope direction and rocky desertification, and the weight of evaluation indexes was analyzed by AHP method, and finally the spatial analysis method of ArcGIS was used for overlay analysis. The results showed that the ecological sensitivity of Xiluodu town was in the form of ladder, increasing from north to south. the south, southeast and southwest of Xiluodu town are of medium high sensitivity, and the area along Jinsha River in the north was mostly of light sensitivity. the proportion of light sensitive area, medium sensitive area and high sensitive area was 99.92%, indicating that the overall ecological sensitivity of Xiluodu town was relatively high. The main factors of ecological sensitivity were rocky desertification, canopy density, soil erosion and altitude. The research results can provide theoretical exploration and suggestions for the ecological environment protection and the establishment of ecological restoration scheme in the surrounding towns of Jinsha River Basin.

Key words: ecological sensitivity, Xiluodu town, ArcGIS, AHP