黄土坡面径流冲刷侵蚀试验研究

通过径流冲刷试验 ,运用能量守恒原理 ,分析了坡面土壤侵蚀率 (Dr)与径流能耗 (ΔE )之间的关系 ,建立了给定土壤条件下坡面土壤侵蚀率估算模型。结果表明 :坡面土壤侵蚀的发生具有一定的临界能量条件 ,以径流能耗作为土壤侵蚀形成的临界参数具有明确的物理意义 ,当径流能耗大于 7.387J时坡面开始有侵蚀发生

Based on the runoff scouring experiments, the relationship between the soil detachment rate of the loess slope surface(Dr)and the energy consumption(ΔE)is analyzed using the law of conservation energy. The soil detachment rate model was built under the experimental soil condition. The results show that there exists the critical energy consumption condition in the initial period of soil detachment. The soil erosion occurred when the energy consumption exceed 7.387J。