Modeling Flow and Pollutant Removal of Wet Detention Pond Treating Stormwater Runoff
Publication: Journal of Environmental Engineering
Volume 130, Issue 11
Abstract
A mathematical model of pollutant removal by wet ponds was developed based on the mass balance principle and the release–storage equation. The release–storage equation can be linear or nonlinear depending on the wet pond shape and the spillway crest features. If the exponent index of the storage relationship is equal to the index of the outflow equation , the wet pond hydrological routing model is linear. Otherwise, the model is nonlinear. Substituting the release–storage equation into the continuity equation produces a nonlinear ordinary differential equation (ODE). A Runge–Kutta method was used to solve the resulting nonlinear ODE. When the ratio of indexes , the hydrologic wet pond model reduces to a special case that leads to an implicit analytical solution. The pollutant removal and flow routing models were tested with data obtained from an actual wet pond for treating highway runoff. The predicted flow discharges and pollutant concentrations compared well with the observed data.
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Information & Authors
Information
Published In
Journal of Environmental Engineering
Volume 130 • Issue 11 • November 2004
Pages: 1315 - 1321
Copyright
Copyright © 2004 ASCE.
History
Published online: Nov 1, 2004
Published in print: Nov 2004
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