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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 impact of rainfall and vegetation coupling on soil erosion is an important part of studying the process of surface erosion. According to the observed data of artificial grassland and natural grassland runoff in Xifeng Soil and Water Conservation Science Experimental Station from 1954 to 1986, the impact of rainfall and vegetation coupling on soil erosion was analyzed from the microscopic point of view. The results are as follows: When the forage coverage is less than 10%, the extreme erosion modulus increases with the vegetation coverage, which shows that the vegetation should play an effective role of corrosion resistance, the coverage should not be less than 10 %; When the vegetation coverage> 10%, the extreme erosion modulus and vegetation coverage showed a good power function relationship; if we want to play a leading role in the vegetation erosion resistance and achieve the best results, the coverage of at least 70 %.