Numerical Morphological Modeling of Open-Check Dams
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Volume 127, Issue 2
Abstract
Open-check dams are built in mountain streams to control sediment transport during a flood. Sediment passes through them at the lowest discharges, whereas deposition occurs during the highest discharges. Open-check dams are currently designed based mainly on construction experience. Modeling of hydraulics and bed morphology in check dams involves mixed flows (supercritical and subcritical) as well as discontinuities such as hydraulic jumps. In this paper an unsteady coupled numerical mobile-bed model that can tackle rapid varying flows and discontinuities is applied. The numerical technique is based on the classical staggered grids and implicit integration schemes, together with a proper mass and momentum balance. The 1D numerical model is successfully verified with experimental data of slit-check dams. The applicability of the model in the design of open-check dams is also illustrated.
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Published In
Journal of Hydraulic Engineering
Volume 127 • Issue 2 • February 2001
Pages: 105 - 114
History
Received: Jun 7, 1999
Published online: Feb 1, 2001
Published in print: Feb 2001
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