不同农垦地下垫面对风蚀起沙风速的影响分析  

Analysis of Velocity of Dust Emission by Wind Erosion on Different Arable Land Surface

作　　者：李宁[1] 张亦超[2] 岳德鹏[2] 杨贵森[1] 张伟[3] 殷建[1] 

机构地区：[1]新疆生产建设兵团水土保持监测总站,新疆830002 [2]北京林业大学林学院,省部共建森林资源培育与保护教育部重点实验室,北京100083 [3]北京地拓科技发展有限公司,北京100084

出　　处：《水土保持学报》2012年第3期269-271,280,共4页Journal of Soil and Water Conservation

基　　金：水利部公益性行业科研专项经费项目(200901052)

摘　　要：以新疆塔里木盆地垦区为例,研究不同地表粗糙度下垫面对风蚀起沙的临界摩擦速度和起沙风速的影响。根据Shao的方法计算不同下垫面起沙风速,结果表明:塔里木盆地垦区所选的小麦、棉花、红枣这3种地类2m高度临界摩擦速度(u*t)分别为棉花地0.40m/s,红枣地0.43m/s,小麦地1.85m/s;2m高度临界起沙风速(ut)分别为棉花地5.3m/s,红枣地5.7m/s,小麦地7.5m/s,小麦地较其他2种地类更具有抵抗风蚀的作用。With the example of Xinjiang Tarim basin,the threshold friction velocity of dust emission by wind erosion,the threshold wind velocity of sand movement on different arable land surface were researched.According to Shao＇s method,the velocity of dust emission by wind erosion on different arable land surface was calculated,the results show that the threshold friction velocity（u＊t）,at which height is 2 m from the ground,cotton,jujube and wheat land was 0.40 m/s,0.43 m/s,1.85 m/s,respectively;the threshold wind velocity of sand movement（ut）,at which height is 2 m from the ground,cotton,jujube and wheat land was 5.3 m/s,5.7 m/s,7.5 m/s,respectively,wheat is more resistance to wind erosion than other two land use types.

关 键 词：土壤风蚀 临界摩擦速度 临界起沙风速 

分 类 号：S157.1[农业科学—土壤学]