YANG Chun-xia,YAO Wen-yi,XIAO Pei-qing,et al.Differences of Slope Erosion Under Different Site Conditions by Experimental Study[J].Research of Soil and Water Conservation,2010,17(01):222-224.
不同立地条件下坡面水土流失的差异性试验研究
- Title:
- Differences of Slope Erosion Under Different Site Conditions by Experimental Study
- 分类号:
- S157
- 摘要:
- 耕作活动和植被建设是人类活动的重要组成部分,以裸地、农地、草地和灌木林地(刚栽植)为研究对象,以人工降雨试验为研究手段,研究不同立地条件下的水土流失差异,并对坡面侵蚀形态进行分析.研究表明：草地的减水减沙作用最明显,坡面产生跌坎和细沟的时间最晚,与裸地相比,减少产沙量97.24%～99.63%、减少径流量62.04%～80.46%,受栽植活动扰动影响,刚栽植的灌木林地没有水土保持作用,且坡面上栽植密度越大水土流失越严重,坡面侵蚀沟贯通且呈宽深的“V”型;农地的水土流失与裸地相比与降雨强度有关,小雨强条件下农地产沙量和径流量均小于裸地,大雨强条件下产沙量和径流量大于裸地;因此科学栽植并做好耕作或植被建设活动期间的水土流失预防工作十分必要.
- Abstract:
- Farming activities and vegetation construction is an important part of human activity,this paper takes bare land,agricultural land,grassland and shrub land(newly planted) as the research object,and by the means of rainfall simulation experiment to study the difference of soil erosion on different site conditions,and analyze the morphological of slope erosion.Studies have shown that:the grassland showed the most obvious effect of reducing erosion and runoff,and the latest appearing the hole and rill among the four site conditions.Compared with the bare land,grassland reduced sediment yield 97.24%~99.63% and reduced runoff yield 62.04%～80.46%,perhaps because of the impacts of planting disturbance,newly planted shrubs almost have no function in soil and water conservation,the more density planting,the more serious soil erosion,After the test,experiment slope rill run through,and presents a wide and deep‘V’-type.For the agricultural land and bare land,the amount of sediment and runoff has a relationship with the rainfall intensity.The sediment and runoff of agricultural land were less than bare land when the rainfall intensity was small.Otherwise,the sediment and runoff of agricultural land were more than bare land under the conditions of higher rainfall intensity.Therefore,it’s necessary to keep scientific and rational planting and control the erosion of farming or vegetation-building activities.
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备注/Memo
收稿日期:2009-8-16。
基金项目:国家重点基础研究发展规划(2007CB407201);水利部公益性行业科研专项经费项目(200701035);黄科院科技发展基金(黄科发200806)
作者简介:杨春霞(1981- ),女,河南睢县人,硕士,工程师,主要从事土壤侵蚀及水土保持应用技术研究.E-mail:yangchx312@126.com