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对裸露或艾灌丛覆盖的大径流小区进行试验.模拟降雨对有植被小区的土壤侵蚀甚微;而在干燥土壤、低雨强的条件下,裸露小区的土壤流失量平均为1.9吨/公顷,在预湿土壤高雨强的条件下,土壤流失量为16.6吨/公顷.土壤前期含水量的高低对侵蚀有显著影响.通用土壤流失方程大大地高估了干燥土壤实测的土壤流失量,但在10%坡度的预湿小区上,它却仅在实测的土壤流失量的13～51%之间.在32%的坡面上,对预报与实测的土壤流失量作了比较,表明高估的流失量部分是由于通用土壤流失方程中坡度值的原因.虽然通用土壤流失方程(USLE)对非农用地的土壤侵蚀没有进行全面计算,但它依然可用来评价牧地、林地的表土侵蚀.运用小区模拟降雨器研究入渗与侵蚀的结果已证明是矛盾的,这导致了荒地经营者对通用土壤流失方程持怀疑态度.根据全世界微型小区上成千上万个入渗类型,一项近期研究声称通用土壤流失方程通常低估每次暴雨基地上的侵蚀量.然而试验观测者认为该方程通常高估荒地的土壤流失量.目前,人们正在为修正植被覆盖和坡度因子作出努力,以提高通用土壤流失方程对荒地的适用性.这里介绍的是:山区牧场裸地和艾灌丛覆盖的大区上,模拟不同强度降雨的土壤流失资料.用修改了的通用土壤流失方程形式对实测损失量和预测损失量进行了比较.
Experiments were carried out on nudity or shrubby runoff areas with large runoff.Effects of simulated rainfall on soil erosion in the vegetation area were insignificant, whereas in the dry and low rainfall conditions, the average amount of soil loss in bare areas was 1.9 tons / ha , And under the conditions of high rainfall intensity of pre-wet soil, the amount of soil loss is 16.6 tons / ha. The amount of soil moisture in early stage has a significant effect on erosion. The general soil loss equation greatly overestimates the measured amount of soil loss in dry soil. However, 10% of the slope of the pre-wetting area, it is only in the measured soil loss between 13 to 51% between the 32% of the slope, forecast and measured soil loss were compared, indicating that the overvalued The loss is due in part to the slope value of the general soil loss equation, which can still be used to assess the topsoil erosion in pastoral and woodlands, although the general soil loss equation (USLE) does not fully account for soil erosion in non-agricultural land The results of infiltration and erosion studies in district simulated rainfall units have proved to be paradoxical and have led to barren operators skeptical of the universal soil loss equation.According to the tens of thousands of infiltration Type, a recent study claims that generalized soil loss equations generally underestimate the amount of erosion on each stormy base, whereas experimental observers consider the equation to overestimate the amount of soil loss on the wasteland. Currently, there are ongoing attempts to correct vegetation cover and grade factors Efforts to improve the universal soil loss equation of the applicability of the wasteland.The introduction is here: the mountain pasture bare land and Ai shrubs covered areas, simulated rainfall intensity of soil erosion data with a modified universal soil loss equation The form compares measured and predicted losses.