Irregularity of bedform dimensions


Mark, C.F. van der and Blom, A. and Hulscher, S.J.M.H. (2007) Irregularity of bedform dimensions. In: NCR-days 2006, November 2-3, 2006, Enschede, The Netherlands (pp. pp. 82-84).

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Abstract:Measured bed elevation profiles show that bedforms are far from regular. Even under controlled steady flow conditions in laboratory flumes bedforms are irregular in size, shape and spacing. Here we present a new Bedform Tracking Tool to determine the (stochastics of) bedform characteristics in an objective manner. This tool helps us in developing a model for variability in bedform dimensions. Form drag, i.e. the flow resistance that is attributed to the presence of bedforms, depends on bedform dimensions. We expect that by taking into account the variability in bedform dimensions the prediction of form drag will be improved. Present research focuses on the effects of variability in bedform dimensions upon form drag.
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Engineering Technology (CTW)
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