基于高分辨率遥感影像的土壤水力侵蚀监测与评价

Survey and Assessment on Soil Hydraulic Erosion Based on High Resolution Remote Sensing Images

以重庆市巴南区惠民街道晓春村凉水社为研究区,依据《土壤侵蚀分类分级标准》,利用谷歌卫星影像和数字高程模型,基于影像特征及野外调查,构建了土地利用及植被盖度解译标志,提取其相应信息并编辑入库;利用GIS空间叠加分析技术,对土壤侵蚀强度等级的空间分布规律进行了评价;分析了土壤侵蚀机制,并提出了土壤侵蚀防治措施与对策。

A soil erosion assessment method was proposed in accordance with Soil erosion classification and classification standard（SL190-2007）,in which both remote sensing image from Google Earth and DEM data were employed to realize a rapid evaluation.Then,Liangshui Agency,situated in Ba＇nan District,Chongqing City,was selected as a study area to make a demonstration.A set of interpretation mark was created combined the features of remote sensing image with field investigation on landuse type and its vegetation coverage,which were subsequently used for image interpretation with software ArcGIS.A slope model was also structured from DEM with the Surface Analysis module in ArcGIS.Soil erosion intensity was where after calculated with data of landuse type,land coverage and slope by overlay analysis tool.Eventually,we tried to probe in the mechanisms of soil erosion,and some countermeasures were brought forth to water and soil conservancy.