Thursday, February 19, 2004
"GLERL's Distributed Hydrology Model for the Maumee River Watershed"
Dr. Thomas E. Croley II Research Hydrologist NOAA/GLERL
GLERL Main Conference Room
2205 Commonwealth Blvd.
Ann Arbor, MI 48105
GLERL adapted their Large Basin Runoff Model from its lumped-parameter definition for an entire watershed to a two dimensional representation of the flow cells comprising the watershed. GLERL modified the LBRM to allow cell inflow from upstream by considering only flows be-tween adjacent cell surfaces but not their subsurface zones. They also organized watershed cell calculations and implemented spatial flow routing. They now take model parameters for each cell proportional to spatial variations observed in the field (in permeability, surface slope, land use and cover, and flow roughness) and calibrate to find the spatial mean parameter values. GLERL and Western Michigan University developed spatial databases for the Kalamazoo River watershed and the Maumee River watershed, for use with the distributed model. After experi-menting with modeling alternatives and behavior, they applied the model to both watersheds to produce animations of spatial outputs, mapped over the watershed. These include daily air tem-perature, precipitation, snow pack, upper soil zone moisture, lower soil zone moisture, ground-water moisture, evapotranspiration, surface moisture storage, and runoff for every cell compris-ing the watershed. GLERL considered several methods to spatially estimate meteorology and depicted their spatial appearance. The animations help to clarify the hydrological processes un-derway in the continuous simulation of the watershed. Extensions of the distributed-parameter model include the addition of lateral cell flows between adjacent subsurface zones (soil zones and groundwater zone), spatial variation schemes for additional model parameters, land cover/land use experiments, application to other watersheds, and the addition of conservative tracer concentrations.
For more information, contact:
Dr. David Reid
David F. Reid, Ph.D. Senior Research Scientist NOAA Seminar Series Co-Chair Task Leader, GLERL Nonindigenous Species Program Member, NOAA Invasive Species Matrix Program Management Team Director, NOAA National Center for Research on Aquatic Invasive Species U.S. Department of Commerce National Oceanic and Atmospheric Administration Great Lakes Environmental Research Laboratory 2205 Commonwealth Blvd. Ann Arbor, MI 48105-2945 Voice: 734-741-2019 FAX: 743-741-2055 GLERL home page: http://www.glerl.noaa.gov