摘要
通过１９８８～１９９５年对响水滩等小河站和因子径流场的监测，研究了小流域水土流失的时空分布，重新评估了流域侵蚀模数，指出前人研究结果与目前川中区小流域侵蚀情况不相吻合；确认坡地壤中流损失为本区径流损失的重要途径；初步探讨了小流域悬推比与输移比等输沙特性；并认为在逐宁组地区，裸岩侵蚀是流域的主要侵蚀源，坡耕地为主要输沙源；研究提出了农耕地治理的调控措施及其适宜范围。
Based on determined data for runoff plots in 1988～1995,studied the time and space distributions of soil and water loss of small catchment,reestimated erosion modulus of small catchment, proposed the results achieved by our predecessors were not consistent with present erosion of small catchment in central Sichuan and confirmed that the subsoil runoff of sloping land is the important way of runoff loss in the area by means of monitoring at Xiangshuitan hydrological station and a series of runoff plots from 1988 to 1995. At the same time, the paper initially has inquired into the ratio of suspended load and bed load, delivery ratio of small catchment, and thought that erosion of bare rock is a main erosion source and cultivated land is a main source of silt discharge in Suining area. Finally, proposed the control measures for soil and water loss in cultivated land and its useful area.
关键词
水土流失
流域侵蚀模型
悬推化
输沙特性
输移比
调控措施
small catchment
soil and water loss
erosion modulus
ratio of suspended load and bed load
delivery ratio
control measure
