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Affiliation: Associate Professor, Department of Civil and Environmental Engineering, University of Illinois, Urbana-Champaign
Event Date: Monday, May 24, 2004
Location: GSFC, Building 33, Room A128
Time: 10:30 AM
Should we be concerned about second order approximations in hydrologic models?
Hydrologic models used in land-atmosphere interaction studies have seen significant grown in sophistication over the years. However, soil-moisture transport equations remain rather simplistic. There is a growing trend of implementing these models at ever increasing resolutions. This necessitates the need to incorporate processes that arise at smaller scales but could be neglected for larger scales studies. In this talk I will show that the soil-moisture transport can be represented as a scale dependent function that uses second order approximations for parameterization. These parameterizations incorporate properties such as the dependence of soil-moisture on the sub-grid statistics of elevation, slope and curvatures. These statistics change with the resolution of the model, and therefore, these formulations allow better characterization of vertical and lateral soil-moisture transport as model resolution changes.
Posted or updated: Tuesday, July 12, 2005
Editor: Paul Przyborski
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