Soil erosion by wind is one of the main natural disasters on the sandy land in West Jilin Province.Based on field investigation

tests

and indoor wind tunnel experiment

the mechanism of soil erosion by wind on sandy land is analyzed.Analyses indicate that soil erosion by wind constantly decreases with the increases in surface roughness

soil moisture content

and organic matter content.A negative exponential relation with surface roughness and soil moisture content and a negative relation with organic matter content are found.Wind is the main force driving soil erosion on the sandy land in the region.When wind velocity exceeds the critical velocity

soil erosion is proportional to the third power of wind velocity.Climate factor for soil erosion by wind is 155.2.Erosion in spring is the severest(76.2).Spatially

both erosive climate factor and erosive wind energy increase from west to east. Yutong County in the northwest part of the region has the greater values.