论文部分内容阅读
以前期概化的4类弃土堆置体为研究对象,采用室内人工模拟降雨试验,研究不同弃土堆置类型在4种不同降雨强度下的产流产沙特征。结果表明:各堆置类型弃土堆置体的径流率随降雨时间呈波动式增大,径流含沙量随降雨时间呈波动式减小,侵蚀速率随降雨时间呈稳定、波动2种变化趋势;平均径流率、平均侵蚀速率与降雨强度呈线性关系,平均径流含沙量与降雨强度呈指数函数关系,总产沙量与总径流量呈线性关系。坡顶平台有车辆碾压的倾倒堆置在降雨强度为2.0,2.5mm/min情况下,总产沙量和总径流量明显大于其它堆置类型。
Four types of spoil dumps, which were generalized in the previous period, were taken as the research object. Indoor artificial simulated rainfall test was used to study the characteristics of runoff and sediment yield of different spoil dumping types under four different rainfall intensities. The results show that the runoff rate of each stacking type spoil pile fluctuates with the increase of rainfall time, the runoff sediment concentration decreases with the fluctuation of rainfall time, and the erosion rate fluctuates with the rainfall time, The average runoff rate and average erosion rate are linear with the rainfall intensity. The mean runoff sediment concentration is an exponential function with the rainfall intensity, and the total sediment yield is linear with the total runoff. On the roof platform with vehicle rolling dumping, when the rainfall intensity is 2.0 and 2.5 mm / min, the total sediment yield and total runoff are obviously larger than those of other stacking types.