基于GIS和RS的土壤侵蚀监测研究——以青海省乐都县为例

以青海省乐都县为例,应用GIS、RS技术,提取监测区坡度、土地利用类型和植被覆盖度因子信息,同时对监测区域进行矢量网格化处理,生成fishnet网格,运用区域统计分析功能将坡度、土地利用类型和植被覆盖度因子信息赋到对应的空间网格上,最后结合土壤侵蚀强度分级标准进行叠加分析,得到监测区域土壤侵蚀强度图。研究表明,乐都县土壤侵蚀强度,强烈以上所占比例达37.2%,中度以上所占比例达67.7%,侵蚀程度已很严重,急需加强综合治理。

GIS and RS-based Study on Soil Erosion Monitoring

The paper extracts the information of slope,land use type and vegetation coverage of monitoring area and conducts vector gridding treatment,then generates fishnet grid through applying GIS and RS technique by taking Ledu County of Qinghai Province as an example.It puts the information of slop,land use type and vegetation coverage into the corresponding space grid by using the function of regional statistics and analytical.Finally,it conducts overlay analysis based on the classification standard of soil erosion intensity and obtains the map of soil erosion intensity of the monitoring area.The study shows that the severe intensity of soil erosion makes up 37.2% and medium degree makes up 67.7% in Ledu County.The degree of soil erosion is serious and needing comprehensive treatment urgently.