基于遥感与GIS的土壤侵蚀潜在危险度评价研究——以青岛市为例

GIS-AND-RS-BASED EVALUATION OF SOIL EROSION POTENTIALITY——A CASE STUDY OF QINGDAO

应用遥感和GIS技术,对土壤侵蚀潜在危险度影响因子的提取方法和指标模型进行了探讨,把坡度、降雨侵蚀力、植被覆盖度、土层厚度、土壤可蚀性、岩性、人口环境容量、坡耕地占坡地面积比例等8个因子作为评价土壤侵蚀潜在危险度的主要因素,利用改进型层次分析法确定8个因子的权重,利用ARCGIS和ARCVIEW软件,对青岛市土壤侵蚀潜在危险度进行了分级评价。

Methods and categorical model for extracting factors affecting soil erosion potentiality with the aid of remote sensing and geographical information system were explored. Eight factors such as slope, rainfall eroding force, vegetation coverage, soil layer thickness, population-environmental capability, soil erosibility, lithology and percentage of cultivated slopeland to slopeland were used for assessing soil erosion potentiality. The modified AHP method was used to determine the weight of each factor. And the soils in Qingdao were graded and evaluated in terms of soil erosion potentiality, using Software ARCGIS and ARCVIEW.