黄土坡面水蚀因子对坡面侵蚀量的影响研究

Research on Influences of Loess Slope Water Erosion Factors to Erosion Amount

以黄土坡面为研究对象,建立土壤侵蚀评价和预报模型,通过室内径流冲刷模拟试验,研究了坡面径流水深及流速的变化规律,分析了坡面径流水动力要素对坡面侵蚀量的影响。结果表明:在土壤侵蚀过程中,坡面径流水深和流速的变化极为复杂,具有时空分布多样性特点,但总体上随径流冲刷流量的增加而增大。通过分析坡面侵蚀量与水蚀因子的关系,建立了坡面侵蚀模型多元回归方程。

It takes loess slope as research object, establishes soil erosion assessment and prediction model,through indoor runoff scour simulation test, studies the change rule of water depth and velocity of slope runoff, and also analyzes the slope runoff hydrodynamic factor＇s influence on the slope surface erosion amount. The research result shows that： In the process of soil erosion, with a diversity of time and space distribution characteristics, the change of water depth and velocity of slope runoff is extremely complex.But on the whole, it increases with the increase of runoff scouring flow. Through the analysis of slope surface erosion amount and water erosion of slope factor correlation, multiple regression equation of slope erosion model is established.