HR: 1340h
AN: H33C-0473 INVITED     [Abstracts]
TI: From process heterogeneity at the hillslope scale to model predictability at the catchment scale
AU: * McDonnell, J J
EM: jeff.mcdonnell@orst.edu
AF: Dept. of Forest Engineering, Oregon State University, Corvallis, OR 97331 United States
AU: Vache, K
EM: kellie.vache@oregonstate.edu
AF: Dept. of Forest Engineering, Oregon State University, Corvallis, OR 97331 United States
AB: Process representation in catchment model structure continues to be a vexing issue in hydrology and is core issue in the PUB movement. Complex hydrological descriptions at the hillslope scale have been difficult to incorporate within a catchment modeling framework due to the disparity between the scale of measurements and the scale of model sub-units. As a result, parameters represented in many conceptual models are often not physically-based or related to physical properties, and therefore cannot be established prior to a model calibration. This talk examines some new strategies for moving from calibration reliant model schemes to new approaches based on better field-based process understanding of water flowpath, source and age. The talk is given from the perspective of an experimentalist, trying to whittle down complexity at the hillslope scale to achieve model simplicity at the catchment scale.
UR: http://www.cof.orst.edu/cof/fe/watershd/
DE: 1860 Runoff and streamflow
DE: 1866 Soil moisture
SC: Hydrology [H]
MN: 2004 AGU Fall Meeting