Coupling Sediment Transport with the Integrated Hydrologic Model (PIHM)
Abstract
Penn State Integrated Hydrologic Model (PIHM) was developed by Qu and Duffy (2004) for multi-process simulation. As a further work, a physically-based non-equilibrium non-uniform sediment transport modeling component is developed and coupled with PIHM. It combines the hillslope and channel processes, and accounts for sediment yield as well as morphological evolution. For hillslope, the rain splash erosion, hydraulic erosion, and sediment transport by overland flow are simulated; for channel, it takes into account the hydraulic detachment and sediment transport by channel flow. An algorithm for bed armoring is proposed and incorporated in the component. And it also includes a river bank erosion submodel which is modified from Darby et al. (2002). The coupling system is solved using a semi-discrete finite volume approach. It is being tested based on three types of flow routing schemes: dynamic wave, diffusion wave and kinematic wave using different scales of watershed data.
- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2006
- Bibcode:
- 2006AGUFM.H21G1450L
- Keywords:
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- 1800 HYDROLOGY;
- 1815 Erosion;
- 1847 Modeling;
- 1849 Numerical approximations and analysis;
- 1862 Sediment transport (4558)