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Hesp, P.A. and Hastings, K. 1998. Width, height and slope relationships and aerodynamic maintenance of barchans. Geomorphology, 22(2): 193–204


Description:

Width, height and slope relationships and aerodynamic maintenance of barchans.

Summary / Notes:

The allometric relationship between the height of barchan dunes and horn to horn widths is re-examined. The addition of new data from barchans in the Namib Desert and elsewhere confirms the relationship that the height of a barchan is approximately one-tenth of the width of the dune. Height and width of the dune are closely linked to the three-dimensional morphology of the dune, in particular, the relatively constant mean angles of around 11° at which the side slopes of the dune are maintained. We suggest that the 3-D barchan form is directly controlled by aerodynamic processes. Constant feedback between three-dimensional stoss face (windward) shape of the dune, slipface height and horn to horn width, and shear stress produces an equilibrium dune form. rnKeywords: barchans, dune height, horn width, morphometric relationships.

Year: 1998

Type: Journal Article

URL: http://www.sciencedirect.com/science/article/pii/S0169555X97000706


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