【摘要】 挟沙风破坏了土壤表面结构,削弱了土壤的抗风蚀性,使地表风蚀量加大,对植物的生长造成不利影响。通过风洞实验模拟挟沙气流下吉林省西部沙地不同类型下垫面的变化情况。结果表明:不同利用类型下垫面,但当风速大于起沙风速后,挟沙气流下的侵蚀量大于净风条件下的侵蚀量,并且风蚀量随风速的提高而增加,土壤风蚀程度与风速的立方成正比。因此,必须采取综合措施对流沙源进行彻底治理,控制风蚀,以改善生态环境。更多还原

【Abstract】 Sandy wind can destroy the surface structure of the soil,weaken the anti-wind erosion of soil,and make the amount of surface wind erosion increased which affect the plant growth adversely.Through the wind tunnel experiments under simulated sandy air in different type change of underlying surface of western Jilin Province.The results showed that underlying surface used in different types,when the wind speed is greater than sand,the erosion of sediment under windy air is greater than the erosion under no wind and it increased with wind speed increasing.Soil erosion degree is direct ration with cubic of the wind speed.Therefore,comprehensive measures to control the soil erosion are provided which improves the ecological environment.更多还原