| Desert and Desertification |
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| Wind Speed Change within the Shelter Forest along the Taklimakan Desert Highway |
| WANG Yan-zai1,2,3, WEI Dian-sheng1,3, WU Yong-qiu1,3, CHENG Hong1,3, ZHANG Chun-lai1,3, DONG Yi-fan1,3, PAN Mei-hui1,3, ZHANG Hong-yan1,3, XU Xing-ri1,3 |
1.State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University, Beijing 100875, China;
2.Geography and Tourism College, Chongqing Normal University, Chongqing 400047, China;
3.MOE Engineering Center of Desertification and Blown-sand Control, Beijing Normal University, Beijing 100875, China |
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Abstract The Taklimakan Desert Highway is the longest highway crossing a drift sand region in the world. The blown sand prevention and control engineering system is a key factor determining whether the highway can operate smoothly. Based on topography measurement, engineering measurement survey and air flow field observation within the shelter forest along the Taklimakan Desert Highway in the dune area, this paper studied the characteristics of wind speed change at different sand dune positions within the shelter forest, and analyzed the blown sand prevention and control efficiency of the shelter forest. Main results include: (1) There are three regions for the wind velocity change within the shelter forest along the section perpendicular to the road: area of wind velocity quickly reducing in front of the shelter forest, area of minimum wind velocity in the middle of the shelter forest, and area of wind velocity respeeding up behind shelter forest. The increasing tendency of wind velocity on the road surface would help to protect the highway from sand disaster. (2) The shelter forest is efficient in preventing sand disaster with more than 80% reduction of wind velocity in the middle of the shelter forest compared to the wind velocity in front of the shelter forest. Wind velocity can be reduced to the minimum when the distance from the edge of the shelter forest surpasses the distance of 10 times height of the forest. (3) There is a notable difference in protective efficiency of the shelter forest at different geomorphologic positions, and the best protective efficiency is present at the bottom of windward slope of sand dunes, the worst at the middle position of the windward slop of sand dunes.
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Received: 12 January 2012
Published: 20 September 2012
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Cite this article:
WANG Yan-zai, WEI Dian-sheng, WU Yong-qiu, CHENG Hong, ZHANG Chun-lai, DONG Yi-fan, PAN Mei-hui, ZHANG Hong-yan, XU Xing-ri. Wind Speed Change within the Shelter Forest along the Taklimakan Desert Highway. JOURNAL OF DESERT RESEARCH, 2012, 32(5): 1216-1223.
URL:
http://www.desert.ac.cn/EN/ OR http://www.desert.ac.cn/EN/Y2012/V32/I5/1216
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2012, Vol. 32 
