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.