逾渗理论在坡面水土保持中的应用

Application of Percolation Theory in the Water and Soil Conservation for Slope

坡面侵蚀是水土流失的源区 ,有必要加快坡面水土治理。由于坡面降雨入渗、汇流、产沙输移实质上是一种逾渗过程 ,则可用逾渗理论指导坡面耕地和非耕地的水保措施。通过比较多种二维点渗流 (雨水占据坡面格点 )逾渗模型的逾渗阈值 ,从理论上认为按蜂房形对坡面进行水利及生物工程治理水土流失具有较好的效果 ,为水保措施指引了一条新的思路。

The slope erosion is the original zone of water and soil loss and water and soil on slope must be treated quickly.because rainfall infiltration on slope,afflux and sediment transport is a percolating process,water and soil conservation for cultivated and non cultivated land on slope is carried out by the percolation theory.Comparing percolation thresholds among the different tow dimensional percolation models,theoretically,water and soil loss is effectively controlled on slope with honeycomb shape and by hydraulic and biological engineerings,which is a new method for water and soil conservation.