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为了研究黄土高原风蚀水蚀交错区两相侵蚀的交互作用,该试验采用风洞和模拟降雨相结合的方法,探讨了风水两相侵蚀条件下坡面降雨入渗、产流产沙特征。结果表明:相对于未风蚀处理,中度风蚀处理(风速14m/s)使坡面产流时间延长,轻度风蚀处理(风速11m/s)对产流时间影响不大(P>0.05);风蚀处理(风速11m/s、14m/s)使坡面入渗率降低2.9%～10.0%,径流强度增加4.5%～21.7%,侵蚀率增加7.3%～39.0%,不同风速间差异不显著(P>0.05),且影响程度均随雨强的增大而降低;风力、水力两种侵蚀营力相互促进导致坡面糙度增大,风速14m/s、雨强100mm/h时,坡面糙度是风速11m/s、雨强60mm/h时的3倍。研究结果为评价风水两相侵蚀效应提供理论依据。
In order to study the interaction between two phases of erosion in the ecotone between wind and water in the Loess Plateau, this experiment uses the combination of wind tunnel and simulated rainfall to study the features of rainfall infiltration, runoff and sediment on the slope under the condition of two phases of wind and water erosion. The results showed that moderate wind erosion (wind speed 14m / s) prolonged the runoff time, and mild wind erosion (wind speed 11m / s) had no significant effect on the runoff time (P> 0.05). The wind erosion (wind speed 11m / s, 14m / s) decreased the slope infiltration rate by 2.9% -10.0%, the runoff intensity increased by 4.5% -21.7% and the erosion rate increased by 7.3% -39.0% P> 0.05), and the degree of influence decreased with the increase of rainfall intensity. The interaction of wind and hydraulic forces resulted in the increase of the roughness of slope, wind speed 14m / s and rainfall intensity 100mm / h, The roughness is 3 times the wind speed of 11m / s and the rainfall intensity of 60mm / h. The results provide a theoretical basis for evaluating the erosion effect of two phases of Feng Shui.