HR: 13:40h
AN: H12F-01    [PDF]
TI: Assessment of Scale-Dependent Runoff Generation Mechanisms in TOPLATS and Noah-router
AU: * Gochis, D J
EM: gochis@rap.ucar.edu
AF: National Center for Atmospheric Research, 3450 Mitchell Lane, Boulder, CO 80307 United States
AU: Sharif, H
EM: sharif@ucar.edu
AF: National Center for Atmospheric Research, 3450 Mitchell Lane, Boulder, CO 80307 United States
AB: Until recently, contemporary land surface models neglected the realistic treatment of runoff. However, the decreasing scale at which land surface models are being applied necessitates the inclusion of lateral surface and subsurface runoff in order to properly close local water budgets. In this study we compare two, distinct, offline land surface models that have been dynamically coupled to runoff schemes. Comparisons of simulated runoff volumes, land surface fluxes, soil moisture states are made using TOPLATS, which uses the conceptual runoff formulation of TOPMODEL and `Noah-router', which uses an explicit dynamical approach. Particular emphasis is placed on assessing the differences in runoff production zones and runoff generation mechanisms (i.e. infiltration and saturation excess and exfiltration) between the two models. Scale dependent behavior of the models is also explored by comparing runoff generation processes when the models are run at different grid scales typical of contemporary rainfall-runoff models.
DE: 1836 Hydrologic budget (1655)
DE: 1860 Runoff and streamflow
DE: 1866 Soil moisture
DE: 1878 Water/energy interactions
SC: Hydrology [H]
MN: 2003 Fall Meeting