HR: 08:45h
AN: H51J-04    [Abstracts]
TI: Integrated River Basin Modeling: A Multi-Resolution, Multi-Purpose Strategy
AU: * Duffy, C J
EM: cxd11@psu.edu
AF: Penn State University, 212 Sackett Bldg., University Park, PA 16802 United States
AB: Hydrological processes within the terrestrial hydrological cycle operate over a wide range of time scales, with interactions ranging from uncoupled to strongly coupled. Numerical simulation of coupled hydrologic processes, such as groundwater flow, channel flow and overland flow, requires an efficient and flexible modeling approach. In this paper, a new strategy for integrated hydrological modeling is proposed (see Qu, 2004) based on the semi-discrete finite volume method (FVM). The model is distributed on an unstructured triangular irregular network (TIN) constructed using domain decomposition and Delaunay Triangulation with a user-defined support. The finite volume elements are prisms, projected from the TIN. The model is designed to capture "dynamics" in multiple processes while maintaining the conservation of mass at all cells, as guaranteed by the finite volume formulation. A test case is presented to demonstrate the flexibility of this model for dynamic water budgets (surface-groundwater-soil) over complex landscapes and long-term atmospheric forcing. The main idea of this presentation is to demostrate how multi-scale and/or nested irregular grids can be used to efficiently model/parameterize large-scale river basins. The presentation discusses the adaptive finite volume method for full coupling of vegetation/energy, soil moisture, groundwater, and overland flow and streamflow, in the context of a geospatial/temporal interface. The paper will also discuss our initial work on a data-model implementation, and optimal grid design and parameter estimation for sites within the Susquehanna River Basin.
DE: 1800 HYDROLOGY
DE: 1816 Estimation and forecasting
DE: 1819 Geographic Information Systems (GIS)
DE: 1839 Hydrologic scaling
SC: Hydrology [H]
MN: Fall Meeting 2005