干旱区生态环境知识资源中心(Arid): Aeolian transport over a developing transverse dune

Arid

	Aeolian transport over a developing transverse dune
	Dong Zhibao; Lv Ping; Zhang Zhengcai; Lu Junfeng
来源期刊	Journal of Arid Land
ISSN	1674-6767
出版年	2014
卷号	6 期号:3 页码:243-254
英文摘要	The spatial and temporal changes in aeolian transport over a dune are fundamental factors that control the morphology of the dune. In the present study, we obtained direct field observations of aeolian transport over a developing transverse dune at the Shapotou Aeolian Experiment Site in the southeastern part of China's Tengger Desert. The transport rate versus wind speed relationship is complicated over a developing dune compared with the relationships over flat surfaces and over dunes that are in equilibrium with the wind. We obtained trend lines for transport rate over the transverse dune versus distance. The transport rate generally increased from the toe to the crest above the stoss slope, but the difference in transport rate between the crest and the toe was smaller than those that have been proposed for taller dunes. The crest/toe ratio for transport rates therefore seems to depend greatly on dune height. Flux density profiles for different points above the dune at different wind speeds were well described by the exponential decay law, as has been proposed for saltation flux density profiles. Coefficients in the flux density profile function can be defined in terms of the transport rate and wind speed. However, the dependence of relative decay rate with height and average saltation height on wind speed was weaker than that observed in a wind tunnel and above a flat surface. The preliminary results obtained in this study require more evidence from field observations to fully describe aeolian transport above developing dunes.
英文关键词	aeolian transport aeolian geomorphology dune dynamics
类型	Article
语种	英语
开放获取类型	Bronze
收录类别	CSCD
WOS研究方向	History
CSCD记录号	CSCD:5116151
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/335340
作者单位	Dong Zhibao, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Key Laboratory of Desert and Desertification, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China.; Lv Ping, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Key Laboratory of Desert and Desertification, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China.; Zhang Zhengcai, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Key Laboratory of Desert and Desertification, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China.; Lu Junfeng, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Key Laboratory of Desert and Desertification, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China.
推荐引用方式 GB/T 7714	Dong Zhibao,Lv Ping,Zhang Zhengcai,et al. Aeolian transport over a developing transverse dune[J],2014,6(3):243-254.
APA	Dong Zhibao,Lv Ping,Zhang Zhengcai,&Lu Junfeng.(2014).Aeolian transport over a developing transverse dune.Journal of Arid Land,6(3),243-254.
MLA	Dong Zhibao,et al."Aeolian transport over a developing transverse dune".Journal of Arid Land 6.3(2014):243-254.