基于RUSLE的土壤侵蚀量研究——以南水北调中线陕西水源区为例  

Research on water district of soil erosion based on RUSLE:Take the South-North Diversion Middle Route Project in Shaanxi for example

作　　者：王晓峰[1] 常俊杰[1] 余正军[1] 张晖[1] 王晓欢[1] 

机构地区：[1]陕西师范大学旅游与环境学院,陕西西安710062

出　　处：《西北大学学报（自然科学版）》2010年第3期545-549,共5页Journal of Northwest University（Natural Science Edition）

基　　金：陕西省水土保持局科技计划基金资助项目(2007-06-11)

摘　　要：目的对南水北调中线陕西水源区的土壤侵蚀进行了初步研究,为水源区的生态保护、水土保持和生态补偿提供重要的依据。方法在GIS技术的支持下,利用遥感影像解译资料、数字高程模型(DEM)及土壤、降雨等数据,对土壤流失方程RUSLE中各因子进行了量化分析,从而实现对南水北调中线陕西水源区土壤侵蚀量的估算,并对结果进行土壤侵蚀强度分级。结果通过计算可得,在南水北调中线陕西水源区,微度侵蚀面积占12.87%,轻度侵蚀面积占30.4%,中度侵蚀面积占30.66%,强度侵蚀面积占26.07%。土壤侵蚀空间分布具有明显的地带性和垂直地带性规律。结论南水北调中线水源区陕西段绝大部分地区属于强度侵蚀地区,仅有少数地区达到微度侵蚀,水土保持任务很艰巨。Aim To study the soil erosion in Shaanxi watershed of Middle Route Project of the South-to-North Diversion,provide an important basis for water resource zones of ecological protection,soil and water conservation. Methods The factors in the Revised Universal Soil Loss Equation （ RUSLE） were quantitatively analyzed by using the data of remote sensing image interpretation,digital elevation model （ DEM） ,soil,rainfall and so on based on GIS technology,and achieved soil erosion estimates in Shaanxi watershed of Middle Route Project of the South-to-North Diversion. Results By calculating available,micro-water areas accounting for 12. 87% ,mild erosion area accounting for 30. 4% ,moderate erosion area accounting for 30. 66% ,the intensity erosion area accounting for 26. 07% in Shaanxi watershed of Middle Route Project of the South-to-North Diversion. Conclusion In the SouthNorth Diversion water district most of the region belongs to the heavily eroded region,only a few areas to micro-degree erosion. Soil and water conservation is a difficult task.

关 键 词：RUSLE 土壤侵蚀 南水北调中线陕西水源区 GIS 

分 类 号：X171[环境科学与工程—环境科学]