摘要
降雨植被耦合对土壤侵蚀的影响是研究地表侵蚀过程的重要内容。根据1954—1986年西峰水土保持科学试验站人工草地和自然草地径流场观测资料,从微观角度分析了降雨植被耦合对土壤侵蚀的影响。研究结果是:当牧草覆盖度<10%时,极端侵蚀模数随着植被覆盖度的增大而增大,这说明要使植被起到有效的抗蚀作用,其覆盖度不应低于10%;当植被覆盖度>10%时,极端侵蚀模数与植被覆盖度呈良好的幂函数关系;如果要使植被抗蚀力起主导作用且达到最优效果,则其覆盖度至少要达到70%。
The influence of precipitation and vegetation coupling to soil erosion is an important issue of surface erosion process study. The paper analyzed the influence of precipitation and vegetation coupling to soil erosion from microscopic point of view based on the observed data of runoff plots of artificial grassland and natural grassland of Xifeng Soil and Water Conservation Experimental Station in the period of 1954-1986. The outcomes show that when the vegetation coverage is smaller than 10%,the extreme erosion modulus is increased along with the increase of vegetation coverage. This shows that the coverage should not be lower than 10% for effective anti-erosion. When the vegetation coverage is greater than 10%,the extreme erosion modulus shows good power function relationship with vegetation coverage. The vegetation coverage should at least reach to 70% if hoping the anti-erosion ability playing a major role and achieving optimal effect.
出处
《中国水土保持》
2014年第3期32-34,69,共3页
Soil and Water Conservation in China
基金
水利部黄土高原水土流失过程与控制重点实验室开放课题基金资助项目(201205)
河南省教育厅自然科学研究计划项目(14B570005)
黄河水利职业技术学院科研基金项目(2013KXJS005
2013KXJS006)
关键词
降雨
侵蚀模数
植被覆盖度
临界值
黄土高原典型区
precipitation
erosion modulus
vegetation coverage
critical value
typical area in the Loess Plateau