|
|
|
| Sensitivity evaluation of soil erosion in Qinghai Lake Basin |
| Zhao Mingyue, Zhao Wenwu, An Yiming, Jin Ting |
| State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University; College of Resources Science and Technology, Beijing Normal University: 100875, Beijing, China |
|
|
|
|
Abstract Qinghai Lake Basin was chosen as study area, in accordance with the Interim Regulations of Ecological Function Zoning, rainfall erosivity, the degree of topographic relief, soil texture, vegetation types were selected as indicators of sensitivity evaluation of soil erosion. A map of single-factor sensitivity evaluation was generated with supports of ArcGIS, moreover, a comprehensive evaluation of soil erosion sensitivity was conducted based on ArcGIS spatial overlay analysis. The results show moderately sensitive area of soil erosion within the study area accounted for 62.02%; followed by highly sensitive region 20.82%; mildly sensitive areas and extreme sensitive area 16.92% and 0.24% respectively. The relatively high sensitive area of soil erosion mainly distributed in the northwest of Tianjun County and east of Haiyan County.
|
|
Received: 16 September 2011
|
|
|
|
|
|
|
