雅鲁藏布江流域土壤侵蚀区域特征初步研究

 在对雅鲁藏布江流域土壤侵蚀现状调查的基础上，分析了流域土壤侵蚀类型和分布规律。分析成果表明：①该流域土壤侵蚀类型众多，包括水力侵蚀、风力侵蚀、重力侵蚀、冻融侵蚀及风水、风冻、水冻两相侵蚀和风水冻三相混合侵蚀；②流域内土壤侵蚀垂直分异明显；③按照土壤侵蚀区域特征，可划分为上游冻融区、中游高山冻融水蚀区、大峡谷及下游水蚀区、“一江两河”冻融水蚀风蚀区、中游下段水蚀冻融区5个类型区。最后结合土壤侵蚀区域特征提出了分区域水土保持防治方略。

Soil Erosion and Subarea Characteristics in Yarlung Tsangpo River Basin

On the basis of actual survey of soil erosion in the Yarlung Tsangpo River basin,the soil erosion area distribution and erosion types in the basin are analyzed.And according to the soil erosion types,characteristics,distribution and dangerous extent,and in combination with the actual conditions and economic development level at local,the analytic results are as follows: 1.The sorts of the basin soil erosion include hydraulic erosion,wind-force erosion,gravitational erosion,freezing and thawing erosion,di-pl...