中文摘要：

为深入了解砒砂岩坡面的侵蚀产沙特征，在野外建立了人工原状砒砂岩坡面，通过放水冲刷试验对比研究了白色和红色原状砒砂岩坡面的产流、产沙过程。结果表明：白色砒砂岩坡面水分入渗率为18．9mm/h，小于红色砒砂岩坡面的47．0mm／h；白色和红色原状砒砂岩坡面水流平均流速与流量呈幂函数关系，相同冲刷流量条件下红色砒砂岩较白色砒砂岩产沙量及坡面水流含沙量大、抗侵蚀性弱；受水分入渗率和砒砂岩颗粒分离速度的控制，两种坡面土壤剥蚀率与单宽流量之间呈向下弯曲的二次曲线关系；两种砒砂岩坡面土壤剥蚀率与水力学参数的相关关系相似，说明其侵蚀产沙的水力学机制是一致的。

英文摘要：

In order to improve understanding of the erosion characteristics on the sandstone slopes, two undisturbed sandstone slopes of the red and white colors were made, and the processes of runoff and sediment yield on the two kinds of slope were studied through field experiments. The results show that water infiltration rate on the white undisturbed sandstone slopes is 18.9mm/h, which is lower than that of the red one 47.0 mm/h. There are power function relations between the average flow velocity and supply water intensity on the slopes. It has larger sediment yield and weaker erosion resistance ability on the red undisturbed sandstone slope than that of the white one. Controlled by the rate of water infiltration and the separation speed of the sandstone particles, soil detachment rate and flow rate per unit width have the relation of＇ quadratic curve function bent downwards. There are similar correlations between soil detachment rate and hydraulic parameters on the two kinds of undisturbed sandstone slope, which shows that the hydraulic mechanisms of sediment yield are essentially consistent.