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[1]WANG Xiang-yu,YUAN Peng-fei,DING Guo-dong,et al.Study on Mechanism Between Natural Shrub-grass and Soil Wind Erosion[J].Research of Soil and Water Conservation,2008,15(05):38-41.

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Study on Mechanism Between Natural Shrub-grass and Soil Wind Erosion

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 15 Number of periods: 2008 05 Page number: 38-41 Column: Public date: 2008-10-20

Title:: Study on Mechanism Between Natural Shrub-grass and Soil Wind Erosion

Author(s):: WANG Xiang-yu¹, YUAN Peng-fei¹, DING Guo-dong¹, SHANG Run-yang², SUN Bao-ping¹, ZHANG Yu-qing¹, WU Bin¹, MA Shi-long³; 1. Key Laboratory of Soil and Water Conservation and Combating Desertification, Ministry of Education, College of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China;
2. Haihe River Water Conservancy Committee, Tianjin 300170, China;
3. The Medium North of the Water Surveys the Design Research Limited Liability Company, Tianjin 300222, China

Keywords:: soil wind erosion; vegetation coverage; aerodynamic roughness; rate of sand transporting; the structure of wind-sand flow

CLC:: S157

DOI:: -

Abstract:: Through field investigation on wind speed, aerodynamic roughness, rate of sand transporting and the structure of wind-sand flow on different underlying surfaces, we found that vegetation cover can prevent soil wind erosion effectively. Compared the fixed sandland whose vegetation coverage is 40% to the drifting sand dune which has no coverage, the average wind speed at the height of 0.2 m reduced 45%, the time of threshold wind velocity of soil erosion kept on reduced 83%, while the threshold wind velocity of soil erosion increased 70% and aerodynamic roughness increased 190 times; Compared to the drifting sand dune, when the speed of wind-sand flow is similar, the rate of sand transporting on semi-fixed sandland reduced 79.4%, while fixed sandland reduced 95.6%. The results indicated that a single plant can reduce wind speed too. Two single Artemisia ordosica could reduce wind speed at the height of 0.5 m by 59.4% and 19.8%.

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