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长江上游地区侵蚀泥沙径流观测资料较少,难以确定不同类型土地侵蚀量。本文利用137Cs示踪法测定了长江上游不同土地类型土壤侵蚀量,农耕地土壤侵蚀量介于758～9854t/(km2·a),非农耕地土壤侵蚀量介于310～4435t/(km2·a),紫色土裸坡侵蚀量高达12444t/(km2·a)。
There are few observation data of erosion sediment runoff in the upper reaches of the Yangtze River, and it is difficult to determine the amount of land erosion of different types. In this paper, the 137Cs tracer method was used to measure the soil erosion of different types of land in the upper reaches of the Yangtze River. The soil erosion of the cultivated land was between 758 and 9854 t / (km2 · a), and the non-agricultural soil erosion was between 310 and 4435 t / (km2 · a ), Purple soil bare slope erosion as high as 12444t / (km2 · a).