滇中高原山地4种人工群落径流量和土壤流失量的研究

Study on Runoff and Soil Erosion of Man-Made Plant Community in Mountain of Central Yunnan Plateau

基于连续5年的定位观测，研究了滇中高原4种典型人工群落的径流与侵蚀特征。结果表明：区域降雨量的季节分配不均，湿季（6～10月）降雨量占全年的86．64％，降雨量主要由大于10mm以上的降雨带来，且降雨强度大部分小于5mm／h。与荒地相比，林地的水土保持效益显著。试验小流域的地表径流量与降水量密切相关。土壤流失量主要决定于地表径流量，其次是降水量。

According to the 5 years＇ observation,the study on the precipitation and runoff of man-made plant community in central Yunnan Plateau was conducted,and some results are as follows： the season distribution of precipitation in the area is uneven, the rainfall of wet season account for 86.64% of the year totals, the precipitation is mainly brought by rainfall with more than 10mm, and most of the rainfall intensities are less than 5 mm/h. Compared to wasteland, the forest land have a notable effect of soil and water conservation. In trial watershed, the runoff has a highly correlation with precipitation, and soil erosion is determined by runoff primarily, following the precipitation.