摘要
通用土壤流失方程式(USLE)是研究土壤侵蚀中被广泛采用的公式。但是鉴于土壤侵蚀的复杂性,在很多情况下,不同地方的土壤侵蚀情况千差万别。因而,在应用该方程的过程中,往往需要对引起土壤侵蚀的各种因子作必要的修正。本文应用广东省小良水土保持试验站2号试验场(纯桉树林)和3号试验场(光板地)多年采集的有关数据,在建立数据库的基础上,运用多元回归分析方法,成功地对该方程中的各个因子进行了切合实际的修正,从而得到了能用于本地区土壤侵蚀预测预报的经验公式。本文重点阐述了通用土壤流失方程中的侵蚀动能因子(R),认为用5min雨强(EI5法)或30min雨强(即EI30法)来估算本地区的土壤流失量是比较切合实际的。
Universal soil loss equation(USLE) is a widely-used equation in studying soilerosion in different locations under different conditions. In applying this equation,it is necessary to make some modifications to each factor affecting soil erosion. Some related data from No.2 testing fields (by pure eucalyptus forest) and No.3 testingfields (by bare land) collected for many years were used in this paper. Based on theestablishment of data base,multiple regression analysis method was employed to makesome practical modifications to each factor in the equation successfully thereby toobtain an empirical equation applicable to predict and pre-estimate soil erosion inthis region. This paper stresses the importance of R-factor in universal soil lossequation,and holds that it is more practical to estimate the amount of soil loss in thisregion using rainfall intensity in 5 minutes (EI 5 method) or rainfall intensity in 30minutes (EI 30 method).
出处
《水土保持通报》
CSCD
北大核心
1992年第1期23-41,共19页
Bulletin of Soil and Water Conservation
关键词
水土保持
土壤侵蚀
土壤流失方程
Universal Soil Loss Equation
kinetic factor of soil erosion rainfall intensity.
