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| Wind Fluctuation over Three Typical Ground Surfaces in Desert-Oasis Ecotone:A case at the southern rim of the Taklimakan Desert |
| Wang Xueqin1, Yang Dongliang1,2, Ma Yang1,2, Liu Jinhui1,2 |
1. Qira Station for Desert Steppe Ecosystem Research and Observation, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China;
2. University of Chinese Academy of Sciences, Beijing 100049, China |
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Abstract Field measurement of wind direction at 200 cm high and wind velocity at five heights (20 cm, 40 cm, 60 cm, 100 cm and 200 cm) over three typical plots, with plant coverage of < 5%, 10%-15% and 20%-25% respectively, was conducted in the Qira desert-oasis ecotone. The purpose of this research is to help to understand the characteristics of wind fluctuation over different ground surface at the southern rim of the Taklimakan Desert. It is concluded that the vegetation type affects the change of average wind velocity, wind velocity fluctuation and wind direction fluctuation, but it has little influence on probability distribution of wind velocity fluctuation. With increasing plants density, the change range of average wind velocity and absolute wind velocity fluctuation decrease. The absolute wind velocity fluctuation increases with increase of wind velocity and with increase of height to ground surface in all three plots. Affected by plant community structure, the relative wind velocity fluctuation becomes complicated. The range of wind direction fluctuation increases with plants density, but it has no obvious change in the same plot when wind velocity changes.
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Received: 13 March 2014
Published: 20 May 2015
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[1] 吴正.风沙地貌与治沙工程学[M].北京:科学出版社, 2003:16-21.
[2] Basil F, Nielsan K F.Movement of soil particles in saltation[J].Canadian Journal of Soil Science, 1962, 42:81-86.
[3] Lyles L, Krauss R K.Threshold velocities and initial particle motion as influenced by air turbulence[J].Transactions of the American Society of Civil Engineers, 1971, 20:880-884.
[4] 邢茂, 郭烈锦.紊流风场中起跳沙粒的轨迹特征[J].中国沙漠, 2003, 23(6):628-631.
[5] Anderson R S.Aeolian sediment transport as a stochastic process:the effects of a fluctuating wind on particle trajectories[J].Journal of Geology, 1987, 95:497-512.
[6] 武建军, 罗生虎, 闫光虎, 等.脉动风场下风沙流结构的数值模拟[J].中国沙漠, 2011, 31(3):602-606.
[7] Butterfield G R.Transitional behavior of saltation:wind tunnel observation of unsteady wind[J].Journal of Arid Environments, 1998, 39:377-394.
[8] 张克存, 屈建军, 董治宝, 等.风沙流中风速脉动对输沙量的影响[J].中国沙漠, 2006, 26(3):336-340.
[9] 李振山, 倪晋仁.风沙流中风速脉动的实验测量[J].应用基础与工程科学学报, 2003, 11(4):352-360
[10] 包慧娟, 李振山.风沙流中风速纵向脉动的实验研究[J].中国沙漠, 2004, 24(2):244-247.
[11] 王萍, 郑晓静.野外近地表风沙流脉动特征分析[J].中国沙漠, 2013, 33(6):1622-1628.
[12] 张克存, 屈建军, 俎瑞平, 等.典型下垫面风沙流中风速脉动特征研究[J].中国科学D辑:地球科学, 2006, 36(12):1163-1169.
[13] Dong Z B, Qian G Q, Lu P, et al.Turbulence fields in the lee of two-dimensional transverse dunes[J].Earth Surface Processes and Landforms, 2009, 34(2):204-216.
[14] 胡永锋, 王雪芹, 郭洪旭, 等.古尔班通古特沙漠半固定沙垄表面风的脉动特征[J].中国沙漠, 2011, 31(2):393-399.
[15] 杨东亮, 王雪芹, 胡永锋, 等.风沙流输沙通量垂向分布研究--以塔克拉玛干沙漠南缘流沙地表风沙流观测为例[J].中国沙漠, 2012, 32(3):631-639.
[16] 杨兴华, 何清, 霍文, 等.塔克拉玛干沙漠南缘风沙跃移运动研究--以策勒县为例[J].中国沙漠, 2012, 32(4):910-913.
[17] 杨东亮.策勒绿洲-沙漠过渡带典型下垫面风沙活动研究[D].北京:中国科学院研究生院, 2011.
[18] 曾凡江, 李向义, 张希明, 等.新疆策勒绿洲外围四种多年生植物的水分生理特征[J].应用生态学报, 2009, 20(11):2632-2638.
[19] 钱亦兵, 张希明, 李小明.塔克拉玛干沙漠南缘绿洲沙物质粒度特征[J].中国沙漠, 1995, 15(2):131-135.
[20] Freberger S G.Dune Form and Wind Regime[R].1979:137-169.
[21] Leenders J K, Van Boxel J H, Sterk G.The effect of single vegetation elements on wind speed and sediment transport in the Sahelian zone of Burkina Faso[J].Earth Surface Processes and Landforms, 2007, 32:1454-1474.
[22] Sterk G.Flattened residue effects on wind speed and sediment transport[J].Soil Science Society of America Journal, 2000, 64:852-858. |
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2015, Vol. 35 
