HR: 09:45h
AN: H11G-07    [Abstracts]
TI: Modeling Hydrologic Response to Land Cover Change in the Inland Pacific Northwest
AU: * Du, E
EM: enhaodu@vandals.uidaho.edu
AF: University of Idaho, College of Natural Resources 975 West 6th Street, Moscow, ID 83843,
AU: Link, T
EM: tlink@uidaho.edu
AF: University of Idaho, College of Natural Resources 975 West 6th Street, Moscow, ID 83843,
AU: Hubbart, J
EM: jhubbart@gmail.com
AF: University of Missouri, University Affairs Division, Columbia, MO 65211,
AU: Gravelle, J
EM: johng@vandals.uidaho.edu
AF: University of Idaho, College of Natural Resources 975 West 6th Street, Moscow, ID 83843,
AB: Although physically based hydrologic models have been applied to understand the mechanisms by which land use change affects watershed hydrology, these models are not always directly transferable from region to region. This is partly because many different mechanisms may be responsible for producing runoff alterations. Perfect fitting of the hydrograph does not necessarily mean that all the internal hydrologic mechanisms have been accurately simulated. A detailed study has been designed to validate internal watershed mechanisms simulated by the Distributed Hydrology Soil Vegetation Model (DHSVM), to assess the hydrologic effects of land use change an interior Pacific Northwest experimental watershed. Hydrological measurements in the experimental area include streamflow, snowpack properties, canopy throughfall, soil moisture, and sap flow to assess the simulated hydrologic components, and hence the model's ability of predict the effects of land cover change. Model simulations span a 5-year pre-treatment, 4-year post-road construction without harvesting, and 5-year post-treatment period to ensure that the model parameterizations accurately quantify the effects of land cover alteration. The validated model was used to make a retrospective simulation of when the entire watershed was clear-cut to predict historical flow regimes. The historical fully clear-cut scenario was then used to provide a baseline to compare to contemporary harvest patterns characterized by sequential canopy removal and regrowth over smaller spatial units. Preliminary modeling results will be presented to illustrate the capability of hydrology model in predicting and forecasting hydrological responses to a range of contemporary forest practices.
DE: 1847 Modeling
DE: 1879 Watershed
SC: Hydrology [H]
MN: 2007 Fall Meeting