关键词: 地表风蚀, 风洞模拟实验, 净风, 挟沙风, 戈壁风蚀平衡

Abstract: The wind erosion features of the four typical ground are studied in the tunnel,in this paper,the imitated equations between wind erosion ratio(kg/m²·hr)and wind grade are expressed for some specific sonditions.In the process of the experiments,pure wind erodibilityand sand-carrying wind erodibility are considered in original and destroyed ground wind erosions.The resuIts of experiments indicate that the wind erosion ratio can be rapidly increased by sand-carrying wind or on the destroyed ground.Two significant phenomena are discovered,One is the existance of the process of gobi ground wind erosion balance,and another one is that eolian sand grain-size is related not only to the wind blowing time but also to thesource of sands and the change of wind grade.The experimental results provide important scientific basis for prevention and amelioration of wind erosion.

Key words: ground wind erosion, imitation experiment in tunnel, pure wind, sandcarrying wind, the balance of gobi wind erosion