Comparative Study of Coupling Approaches for Surface Water and Subsurface Interactions
| Autor: | Gour Tsyh Yeh, Guobiao Huang |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
Surface (mathematics)
Interface (Java) Hydrological modelling Mechanics Coupling (physics) Hydrology (agriculture) Environmental Chemistry Geotechnical engineering Special case Subsurface flow Surface water Physics::Atmospheric and Oceanic Physics Geology General Environmental Science Water Science and Technology Civil and Structural Engineering |
| Zdroj: | Journal of Hydrologic Engineering. 14:453-462 |
| ISSN: | 1943-5584 1084-0699 |
| Popis: | In the core of an integrated watershed model there is coupling between surface water and subsurface water flows. Recently, interest in hydrology literature, regarding the fully coupled approach for surface and subsurface water interactions, has increased. For example, the assumption of a gradient-type flux equation, based on Darcy’s law and the numerical solution of all governing equations in a single global matrix, has been reported. This paper argues that this “fully coupled approach” is only a special case of all possible coupling combinations and, if not applied with caution, the nonphysics interface parameter becomes a calibration tool. Generally, there are two cases of surface/subsurface coupling based on the physical nature of the interface: continuous or discontinuous assumption; when a sediment layer exists at the interface, the discontinuous assumption may be justified. As for numerical schemes, there are three cases: time lagged, iterative, and simultaneous solutions. Since modelers often resor... |
| Databáze: | OpenAIRE |
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