| 风速对海岸沙丘表面风沙流结构影响的实证研究 |
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| 引用本文： | 董玉祥,马骏.风速对海岸沙丘表面风沙流结构影响的实证研究[J].干旱区资源与环境,2009(9). |
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| 作者姓名： | 董玉祥 马骏 |
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| 作者单位： | 中山大学地理科学与规划学院; |
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| 基金项目： | 国家自然科学基金项目(项目编号:40571019)资助 |
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| 摘 要： | 在河北昌黎黄金海岸形态典型的横向沙脊顶部,对不同风速下的风沙流结构进行了观测。结果表明:随着风速的增加,风沙流中40 cm高度内的绝对输沙量增加,40~60 cm高度内各层的绝对输沙量减少;相对输沙量,在0~4 cm高度内减少,4~20 cm高度内增加,20~44 cm高度内变化较小,44~60 cm高度内减少;风沙流结构模式在0~40 cm高程内为指数分布,但在0~60 cm高程内随风速增大由幂函数分布转变为指数函数分布,在40~60 cm高程内则转变为相关性更强的多项式函数分布。风速变化对风沙流结构的上述影响,主要与随风速增加增大了沙粒的搬运高度以及气流搬运沙物质的粒度组成有关。
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| 关 键 词： | 风速 海岸横向沙脊 风沙流结构 野外观测 |
Field measurements of influence of total sand transport rate on the structure of wind-sand flow on the coastal transverse ridge |
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| DONG Yuxiang,MA Jun.Field measurements of influence of total sand transport rate on the structure of wind-sand flow on the coastal transverse ridge[J].Journal of Arid Land Resources and Environment,2009(9). |
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| Authors: | DONG Yuxiang MA Jun |
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| Institution: | School of Geography and Planning;Sun Yat-Sen University;Guangzhou 510275;P.R.China |
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| Abstract: | On the crest of typical coastal transverse ridge at Changli Gold Coast in Hebei Province,the data of structure of wind-sand flow at the different wind velocity was measured by use of field vertical anemometer and sand trap.The field measurement results showed,with the increasing of wind-velocity,the absolute sand transport rates of layers in 40cm height in the wind-sand flow increased,but the absolute sand transport rates of layers in 40~60cm decreased.The ratio of sand transport rate of different height la... |
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| Keywords: | wind velocity coastal transverse ridge structure of wind-sand flow field measurement |
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