Parametric-Deterministic Urban Watershed Model

by William M. Alley, Hydro.; U.S. Geological Survey, Reston, Va.,
John C. Schaake, Jr., (M.ASCE), Chf.; Hydrologic Sci. Div., National Weather Service, Silver Spring, Md.,
David R. Dawdy, (M.ASCE), Sr. Hydro.; Dames and Moore, Washington, D.C.,

Serial Information: Journal of the Hydraulics Division, 1980, Vol. 106, Issue 5, Pg. 679-690

Document Type: Journal Paper


A parametric-deterministic urban rainfall-runoff model is described. The model uses a parametric soil-moisture-accounting procedure to determine antecedent-moisture conditions and the Philip equation to compute infiltration. Kinematic-wave theory is used for deterministic routing of flows over contributing areas and through a branched system of pipes or natural channels or both, to the watershed outlet. An option is included in the model to calibrate the soil moisture and infiltration parameters using a modified-Rosenbrock optimization technique. The model is conceptually simple, but a set of model segments can be arranged easily into a network that will represent many complex drainage basins.

Subject Headings: Parameters (statistics) | Municipal water | Urban areas | Watersheds | Hydrologic models | Infiltration | Optimization models | Drainage basins

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