Flow dynamics and sediment transport over a reversing barchan, Changli, China

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• 作者：Dong Yuxiang^a ; ^b ; ^{eesdyx@mail.sysu.edu.cn} ; Patrick A. Hesp^c ; ¹ ; ^{Patrick.hesp@flinders.edu.au} ; Huang Dequan^a ; S.L. Namikas^d
• 关键词：Coastal dune ; Barchan ; Reversing dune ; Wind flow ; Aeolian sand flux ; Sediment transport rate
• 刊名：Geomorphology
• 出版年：2017
• 出版时间：1 February 2017
• 年：2017
• 卷：278
• 期：Complete
• 页码：121-127
• 全文大小：1017 K
• 卷排序：278

文摘

The flow and sediment transport over a reversing ~ 7 m–high barchan dune in China is examined. Velocity profiles are non-logarithmic and jets occur at the dune crest. Speed-up across the windward slipface is significant with a ratio of 5.25. Maximum total sediment flux occurred at the dune crest. Significant sedimentation takes place downwind on the leeward dune surface due to a sand plume streaming from the dune crest.