植被覆盖地表的空气动力学粗糙度及对土壤风蚀的影响  

Aerodynamic Roughness of Vegetation Coverage Surface and its Influence on Soil Erosion by the Wind Tunnel

作　　者：赵永来[1] 麻硕士[1] 陈智[1] 

机构地区：[1]内蒙古农业大学机电工程学院,呼和浩特010018

出　　处：《农机化研究》2007年第2期36-39,共4页Journal of Agricultural Mechanization Research

基　　金：国家自然科学基金项目(30260092)

摘　　要：空气动力学粗糙度是影响植被覆盖土壤抗风蚀能力的重要因素。利用移动式风蚀风洞对试验区田地表进行原位测试,由风速廓线得到的空气动力学粗糙度,可有效地反映地表的空气动力学性质。测试结果表明:植被盖度愈大,空气动力学粗糙度愈大;土壤风蚀量随空气动力学粗糙度增大呈指数规律下降。Surface roughness is an important feature that affects vegetation coverage soil against wind erosion. By means of the movable wind tunnel, the tests of the original position have been carried out. Aerodynamic roughness calculated by wind profile can be used to depict aerodynamic properties of farm surface effectively. Wind tunnel tests indicate that the more vegetation coverage is the more aerodynamic roughness length. The amount of soil wind erosion decreases exponentially with vegetation coverage increasing.

关 键 词：农业基础学科 空气动力学粗糙度 分析 植被盖度 土壤风蚀 可移动式风洞 

分 类 号：S151.1[农业科学—土壤学]