|
|||||
|
|
Numerical Morphological Modeling of Open-Check Dams |
|
| Authors: | Marcela M Busnelli Guus S Stelling Michele Larcher |
| Affiliation: | 11Res., Hydromechanics Sect., Fac. of Civ. Engrg., Delft Univ. of Technol., P.O. Box 5048, 2600 GA Delft, The Netherlands; formerly, PhD Res., Delft Hydraulics, P.O. Box 177, 2600 MH Delft, The Netherlands. 22Sr. Sci., Delft Hydraulics, P.O. Box 177, 2600 MH Delft, The Netherlands; and Prof., Delft Univ. of Technol., Fac. of Civ. Engrg., P.O. Box 5046, 2600 GA Delft, The Netherlands. 33PhD student, Dept. of Civ. and Envir. Engrg., Università degli Studi di Trento, Via Mesiano 77, 38050 Trento, Italy. |
| 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. |
| Keywords: | |