| 乌兰布和沙漠新月形沙丘迎风坡风速变化的初步研究 |
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| 引用本文： | 杨婷婷,丁国栋,郝玉光,马士龙,尚润阳.乌兰布和沙漠新月形沙丘迎风坡风速变化的初步研究[J].水土保持研究,2006,13(3):218-219,225. |
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| 作者姓名： | 杨婷婷 丁国栋 郝玉光 马士龙 尚润阳 |
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| 作者单位： | 1. 北京林业大学,水土保持学院,北京,100083
2. 中国林业科学研究院,沙漠林业实验中心,内蒙古,磴口,015200 |
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| 基金项目： | 国家自然科学基金资助项目“基于空气动力学流动阻力及绕流理论的植被防风蚀机理研究”(项目编号:30471422) |
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| 摘 要： | 对乌兰布和沙漠新月形沙丘表面风速的野外观测结果表明,沙丘迎风坡气流加速量主要和沙丘坡面形态、迎风坡前来流风速有关,迎风坡风速放大率介于1.02~1.59之间。近地面风速和输沙强度由坡脚至丘顶总体呈递增趋势,丘顶风速和输沙率最大,到背风坡因涡流作用,风速由丘顶至坡脚减小,输沙率锐减,相对于丘顶的风速率变化在0.17~0.49之间。由于输沙率与起沙风速的立方成正比,因而风速在迎风坡上向丘顶增加时,丘顶区域的输沙率(相对于坡脚)将成倍增加。
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| 关 键 词： | 乌兰布和沙漠 新月形沙丘 表面气流 输沙率 |
| 文章编号： | 1005-3409（2006）03-0218-02 |
| 收稿时间： | 2005-06-24 |
| 修稿时间： | 2005-06-24 |
A Preliminary Study on Variation in Wind Velocity and Sediment Transport Rate on Windward Slope of Barchan Dune |
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| YANG Ting-ting,DING Guo-dong,HAO Yu-guang,MA Shi-long,SHANG Run-yang.A Preliminary Study on Variation in Wind Velocity and Sediment Transport Rate on Windward Slope of Barchan Dune[J].Research of Soil and Water Conservation,2006,13(3):218-219,225. |
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| Authors: | YANG Ting-ting DING Guo-dong HAO Yu-guang MA Shi-long SHANG Run-yang |
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| Institution: | 1. College of Water and Soil Conservation ,Beijing Forestry University, Beijing 100083, China ; 2. The Desert Forestry Experimental Center, Chinese Academy of Forestry, Dengkou, Inner Mongolia 015200, China |
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| Abstract: | Field measurement of surface wind velocity and sediment transport rates was made on barchan dune in Wulanbuhe desert to understand.The results show that the wind velocities increasing upon windward slopes of the dunes vary with both slope morphology and wind velocity at the foot of the dunes.The velocity amplification factors range from 1.02 to 1.59.Wind velocity and sediment transport increase from foot of slope to the top as a whole,and decrease on leeward slope.On the whole slope sediment transport and wind velocity is the greatest at the crest.With the increase of wind velocity,sediment transport increases in reduplication. |
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| Keywords: | Wulanbuhe Desert barchan dune surface air-flow sediment transport rate |
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