HR: 08:45h
AN: H21I-03 INVITED     [Abstracts]
TI: Atmospheric Controls and Soil Moisture Inputs for a Coupled Model of Surface-Subsurface Interactions
AU: * Paniconi, C
EM: claudio.paniconi@ete.inrs.ca
AF: Institut National de la Recherche Scientifique - Centre Eau, Terre et Environnement (INRS-ETE), Université du Québec, 490 de la Couronne, Québec, G1K 9A9 Canada
AU: Putti, M
EM: putti@dmsa.unipd.it
AF: Dipartimento di Metodi e Modelli Matematici per le Scienze Applicate, University of Padova, Via Belzoni 7, Padova, 35131 Italy
AB: We will describe recent work on a model that integrates land surface (1D overland and channel flow) and subsurface (3D soil and groundwater flow) processes via a coupling term that is computed as the balance between atmospheric forcing (rainfall and potential evaporation) and the amount of water that can actually infiltrate or exfiltrate the soil. This is one of several different approaches in recent hydrological modeling research that seeks to better represent the interactions in the atmosphere-land surface-subsurface continuum. The same diffusion wave equation is used for both hillslope runoff (rill flow) and channel flow, with the drainage network extracted from digital terrain data and with the distinction between these two surface flow regimes based on a threshold value of upstream drainage area. Renewed interest in physically-based, distributed hydrological models owes much to the promise of readily available observation data at relevant spatio-temporal resolutions (e.g., rainfall radar, active or passive microwave for soil moisture). To this end we will also describe the data assimilation module currently implemented in the coupled model and some of the issues relating to its use and further development, and some ongoing work to assess the potential of synthetic aperture radar (SAR) imagery from the Envisat and Radarsat satellites for soil moisture estimation.
DE: 1805 Computational hydrology
DE: 1829 Groundwater hydrology
DE: 1830 Groundwater/surface water interaction
DE: 1847 Modeling
DE: 1866 Soil moisture
SC: Hydrology [H]
MN: Fall Meeting 2005