植被对土壤风蚀影响的风洞实验研究  

Wind Tunnel Studies on Influences of Vegetation on Soil Wind Erosion

作　　者：张春来[1] 邹学勇[1] 董光荣[2] 刘玉璋[2] 

机构地区：[1]北京师范大学中国沙漠研究中心教育部环境演变与自然灾害重点实验室,北京100875 [2]中国科学院寒区旱区环境与工程研究所,兰州730000

出　　处：《水土保持学报》2003年第3期31-33,共3页Journal of Soil and Water Conservation

基　　金：国家自然科学基金(批准号:40171011;39990490);北京市科技新星计划资助

摘　　要：利用风洞模拟实验,系统研究了植被覆盖对土壤风蚀的影响。结果表明,临界侵蚀风速与植被盖度之间、风速与土壤风蚀发生的临界植被盖度之间均为非线性正相关关系;植被盖度与空气动力学粗糙度、摩阻速率之间具有良好的相关性;植被覆盖条件下空气动力学粗糙度和摩阻速率的增大对土壤风蚀具有显著的影响。Using wind tunnel tests, influences of vegetation coverage on soil wind erosion were systematically studied. The results indicated that threshold wind velocity of soil erosion is nonlinearly and positively related to vegetation coverage, as well as the relations between threshold vegetation coverage and wind velocity. It is concluded that aerodynamic roughness length and shear velocity are well correlated to vegetation coverage. The enhancements of the aerodynamic roughness length and the shear velocity influenced soil wind erosion remarkably. 

关 键 词：植被覆盖 土壤侵蚀 风蚀 风洞实验 植被盖度 空气动力学粗糙度 摩阻速率 

分 类 号：S157.1[农业科学—土壤学]