不同盖度草地水土流失分析

Studyon water and soil erosion of grassland under different coverages

以内蒙古呼伦贝尔市新巴尔虎右旗坡度草地为研究对象,采用野外人工模拟降水试验,研究典型区域内不同盖度草地在不同降水强度下的产流、产沙特征。研究表明:不同盖度草地在不同降水强度下初始产流时间、产流产沙量有显著差异;50%盖度草地60mm/h下径流含沙率最小,盖度越大截流、截沙能力明显增强。因此,降低放牧强度提高草地盖度可以有效减少草原水土流失现象。

In order to reveal the impacts of grazing intensity on water and soil erosion of grassland,the grass-land under coverage in New Barag Right Banner was selected to measure the runoff and sediment at different rainfalls through field simulated rainfall method.The results show that the initial time and features of runoff and sediment were significantly different under different coverage and rainfalls.The grassland with higher cover-age could reduce the runoff.