黄土高原南部土壤侵蚀能量的研究  

Soil Erosion Energy in the South of Loess Plateau

作　　者：赵晓光[1,2] 李凯荣[1,2] 贾锐鱼 

机构地区：[1]西北林学院水土保持系 [2]陕西省水利学校

出　　处：《西北林学院学报》1998年第2期10-14,共5页Journal of Northwest Forestry University

摘　　要：本区可蚀性降雨的雨滴动能变化范围为３６．９１Ｊ／ｍ２～９１５．４９Ｊ／ｍ２，并可划分为４级。根据本区土壤入渗的水文模型，推导出坡面径流平均单位面积上的径流能量为Ｅｊ＝ρｇ４Ｌｓｉｎ２θＰｈ，用实测资料检验，Ｅｊ与土壤流失量的相关性较同类公式显著，当结合降雨雨滴能量Ｅｄ时，相关性更好；在此基础上，给出土壤水力侵蚀的动力模型Ｍｓ＝ｋ（（αＥｊ＋βＥｄ）－Ｅ０），并计算出本区Ｅ０、Ｋ、α、β的平均值。The kinetic energy of erodibal rainfall was about 36.91～915.49J/m2 and could be divided into 4 classes.According to the hyrologic model of soil permeating in this area ,the runoff energy could be expressed as E=ρg4sin2θ.Examined by experiment data,the correlation between Ej and soil loss in this model was more significant than in others and it would be better when the raindrop energy (Ed) was concerned. On this basis, the dynamic model of water erosion has also been constructed as Ms=k(αEj+βEd)-E0 and the average valus of E0, k, α,β in this area have been calculated, too.

关 键 词：侵蚀 径流 能量 黄土高原 

分 类 号：S714.7[农业科学—林学] S157.1