Selection of Stormwater Model Parameters
Publication: Journal of Environmental Engineering
Volume 115, Issue 1
Abstract
Stormwater models, which are used extensively for stormwater drainage design and management, require calibration. The parameters usually estimated by calibration include infiltration and roughness. Parameters that can be determined by measurement include catchment area, slope, and length of flow path. The dependency of parameter values on the level of model discretization was investigated. Experiments were performed on a small urban catchment, and results of different levels of discretization were compared to observed hydrograph volume and peak runoff. The only factor found to require adjustment based on the level of discretization and the size of subcatchment was the overland flow time. Small‐scale discretization required a longer flow path or a higher Manning roughness coefficient than coarse discretization to predict lag times correctly.
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Information & Authors
Information
Published In
Journal of Environmental Engineering
Volume 115 • Issue 1 • February 1989
Pages: 210 - 220
Copyright
Copyright © 1989 ASCE.
History
Published online: Feb 1, 1989
Published in print: Feb 1989
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