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通过对青海长江、黄河和澜沧江三江源区2005年时像的土壤侵蚀遥感调查,从宏观上查清了该区土壤侵蚀类型、面积和分布:三江源区土壤侵蚀面积11.48万km2,其中水力侵蚀1.84万km2,风力侵蚀1.16万km2,冻融侵蚀8.48万km2。土壤侵蚀主要分布在果洛州6县、玉树州6县、海南州2县、黄南州2县和格尔木市1乡,共涉及16县1乡。三江源区水力侵蚀主要发生在5—9月份,风力侵蚀主要发生在冬春季节,冻融侵蚀主要发生在4—5月份。该项研究为三江源区生态环境保护和建设的决策、规划及研究提供了基础数据。
By the remote sensing survey of soil erosion in 2005 in the Yangtze River, Yellow River and Lancang River in Qinghai Province, the type, area and distribution of soil erosion in the area were ascertained macroscopically: the soil erosion area in the Three Rivers was 114,800 km2, among which the hydraulic erosion 18,400 km2, wind erosion of 116,000 km2, and freezing-thawing erosion of 84,800 km2. Soil erosion is mainly distributed in 6 prefectures of Guoluo, 6 counties of Yushu, 2 counties of Hainan, 2 counties of Huangnan and 1 township of Golmud, involving 16 counties and 1 township. Water erosion in the Three River Source Region occurred mainly in May-September. Wind erosion mainly occurred in winter and spring. The freeze-thaw erosion mainly occurred in April-May. The study provided the basic data for the decision-making, planning and research of ecological environment protection and construction in the Three River Source Region.