摘要
为了揭示黄土高原水蚀风蚀交错区风水复合侵蚀机制,利用室内风洞,在一定的风速(9.3m/s)、坡度(20°)下,人工模拟不同沟宽、沟深、沟密度对风蚀过程的影响。结果表明,在一定的水蚀沟宽度与密度范围内,风蚀量随着宽度与密度的增加而增加,并且两者与风蚀量都呈线性关系;侵蚀沟深度在4～8cm范围内,风蚀量随着沟深度增加而增加,当沟深大于8cm时,随着沟深度增加,风蚀量有所减少;水蚀沟发生风蚀的部位主要在沟壁和沟头,风沙流的磨蚀作用可能是主要作用力,水蚀沟形成会显著影响风蚀量。
Effect of water erosion on wind erosion was studied by wind tunnel under the different width,depth and density of rill under the condition of wind speed（9.3 m/s） and steep slope（20°） in order to reveal the mechanism of aeolian-fluvial interaction in the water-wind erosion crisscross region on the Loess Plateau.The results show that the sediment yields of wind erosion increased with the rill width and density during the certain range,and the sediment yields of wind erosion presented a positive relation with the rill width and density;in the 4~8 cm range,the sediment yields of wind erosion increased with the depth,while decreased when the depth was over 8 cm.Wall and foreside of rill were eroded easily by wind and the abrasive action of sand-driving wind may be the main force.The width,density and depth of rill were the key factors to influence the sediment yields of wind erosion,therefore,wind erosion was affected significantly by water erosion.
出处
《水土保持学报》
CSCD
北大核心
2012年第2期75-79,共5页
Journal of Soil and Water Conservation
基金
黄土高原土壤侵蚀与旱地农业国家重点实验室自主课题
中央高校基本科研业务费专项(Z109021004)
关键词
风蚀水蚀交互作用
水蚀沟
风蚀
黄土高原
aeolian-fluvial interaction
rill
wind erosion
the Loess Plateau
