Analytical Solutions for Contaminant Transport in Wetlands Incorporating Surface Water and Groundwater Interactions
Publication: Journal of Hydrologic Engineering
Volume 20, Issue 4
Abstract
Wetlands are the transitional zones between uplands and downstream flooded systems; they play an important role in controlling storm water peak flow and downstream water quality. Since surface water/subsurface water interactions affect solute transport within wetlands significantly, contaminant transport models incorporating these interactions need to be investigated for wetland areas. Wetland solute transport dynamics (WETSAND) is a comprehensive wetland model, which has both surface flow and solute transport components. In WETSAND, water quality components are solved by advection-dispersion-reaction equations, which incorporate surface water/groundwater interactions by including the incoming/outgoing mass due to the groundwater recharge/discharge. In this study, analytical solutions for the contaminant transport equations of WETSAND are developed and compared to the numerical solutions obtained by WETSAND. These analytical solutions provide a physical insight to wetland water quality. Results show that analytical solutions are in good agreement with the numerical solutions. Moreover, the effect of interactions on wetland water quality is discussed.
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Acknowledgments
The author would like to express her gratitude to the anonymous reviewers, the Associate Editor and the Editor for their excellent suggestions, which strengthened the paper.
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Published In
Journal of Hydrologic Engineering
Volume 20 • Issue 4 • April 2015
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Oct 2, 2013
Accepted: May 30, 2014
Published online: Aug 13, 2014
Discussion open until: Jan 13, 2015
Published in print: Apr 1, 2015
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