永定河沙地播草盖沙效果的风洞试验研究  

Experimental Study on Wind Channel of Effects of Sand Covered by Seeded Grass on Sandy Area of Yongding River

作　　者：冯晓静[1] 高焕文[1] 毛宁[1] 王树东[1] 

机构地区：[1]中国农业大学工学院

出　　处：《中国水土保持》2006年第4期16-18,共3页Soil and Water Conservation in China

基　　金：科技部农业科技成果转化基金项目(02EFM216900734)

摘　　要：利用野外移动式风洞试验装置，对永定河不同植被覆盖率河滩农地在不同风速下的风蚀量进行了测定。结果表明：播草盖沙可以提高起沙风速，有效减少河滩地的土壤流失。客土地表植被覆盖率达到30％时可比裸露地表减少风蚀量34．55％～58．0％，覆盖率60％时可减少70．48％-84．0％。河滩土植被覆盖率达到30％时即可将风蚀控制在轻微侵蚀范围内。客土有利于植被建设，相同覆盖率和风速下的风蚀量小于河滩土。It measures wind erosion under the conditions of different wind speed of floodplain area with different vegetation coverage ratio of the Yongding River by using mobile filed wind channel equipment.The outcomes show that sand covered by seeded grass can reduce wind speed and effectively reduce soil loss of the floodplain area.When the vegetation coverage ratio of improved soil surface imported from other places reaches to 30%,the amount of wind erosion can be reduced by 34.55% ~ 58.0% and reduced by 70.48% ~ 84.0% as the coverage ratio reaches to 60% comparing with the exposed surface.When the coverage ratio of floodplain area reaches to 30%,the wind erosion can be controlled within the range of light erosion.The improved soil imported from other places is of great advantage to vegetation and the amount of wind erosion under the same conditions of coverage ratio and wind speed is smaller than that of the floodplain area.

关 键 词：沙地 风蚀 风洞试验 播草盖沙 覆盖率 永定河 

分 类 号：S157.43[农业科学—土壤学]