Experimental modeling of dune bed form in a sand-bed channel

	Experimental modeling of dune bed form in a sand-bed channel
Iranian Journal of Science and Technology Transactions of Civil Engineering
شناسنامه علمی شماره، دوره 30، شماره 4، فروردین 2006، صفحه 503-516
شناسه دیجیتال (DOI): 10.22099/ijstc.2013.776
چکیده
Resistance to flow is an important and primary parameter in the determination of water surface elevation. A variety of bed forms, especially dunes, have a sensible effect on total roughness. Because of the complexity of bed form development, previous methods differ drastically from each other in predicting dune bed forms. In this paper, laboratory experiments were conducted to investigate the geometry of dunes in a sand-bed channel and its influence on total channel resistance. The experiments were performed in a flume in the hydraulic laboratory ofShirazUniversityusing sand particles. Simple relations were sought for dune dimensions via some dimensional parameters, and previous methods were compared to each other in light of this new data.
کلیدواژه‌ها
Dune bed form؛ form roughness؛ dune geometry؛ sand-bed channel

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