摘要
为了研究在不同强度降雨下,植被覆盖对丘陵地区坡面侵蚀的影响,通过人工模拟降雨试验,研究了在不同植被覆盖率条件下,坡面径流量和产沙量动态变化过程。结果显示:(1)降雨强度和植被覆盖率对坡面产流产沙有显著影响,当植被覆盖率低于45%的临界值时,坡面径流量将明显增加;(2)当植被覆盖率达到45%时,坡面产流减沙效果明显,且变化幅度随着植被覆盖率的增加而减小;(3)在相同降雨强度条件下,坡面上的产沙率呈先急剧上升再逐渐下降的趋势,且植被覆盖率越高,产沙强度下降率越高。以上研究可为丘陵地区水土保持提供参考。
In order to study the effect of vegetation coverage on slope erosion in hilly areas under different rainfall intensities,this paper studied the effects of vegetation coverage on slope erosion under different rainfall intensities,the dynamic change process of runoff and sediment yield.The results show that:(1) rainfall intensity and vegetation coverage have significant effects on runoff and sediment yield.When the vegetation coverage is below the critical value of 45%,runoff will increase significantly;(2)when the vegetation coverage rate reaches 45%,the runoff and sediment yield on the slope is obvious,and the change range decreases with the increase of the vegetation coverage rate;(3) under the same rainfall intensity,the rate of sediment yield on slope increased sharply at first and then decreased gradually,and the higher the vegetation coverage,the higher the rate of sediment yield decline.The above research can provide reference for soil and water conservation in hilly area.
作者
朱翔宇
Zhu Xiang-yu(Shijiazhuang Hydrological Survey and Research Center of Heibei Province,Shijiazhuang,Hebei 050051)
出处
《农业灾害研究》
2023年第11期299-301,共3页
Journal of Agricultural Catastrophology
关键词
模拟降雨
植被覆盖率
径流量
产沙强度
Simulated rainfall
Vegetation coverage
Runoff
Sediment yield intensity
