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Water 2016, 8(8), 326; doi:10.3390/w8080326

Assessment of the Impact of Subsurface Agricultural Drainage on Soil Water Storage and Flows of a Small Watershed

1
Institute National de la Recherche Scientifique, Centre Eau Terre Environnement (INRS-ETE), 490 Rue de la Couronne, Ville de Québec, QC G1K 9A9, Canada
2
Département des Sols et de Génie Agroalimentaire, 2480 Boulevard Hochelaga, Université Laval, Ville de Québec, QC G1V 0A6, Canada
*
Author to whom correspondence should be addressed.
Academic Editors: Christopher J. Duffy and Xuan Yu
Received: 15 April 2016 / Revised: 20 July 2016 / Accepted: 26 July 2016 / Published: 3 August 2016
(This article belongs to the Special Issue Hillslope and Watershed Hydrology)
View Full-Text   |   Download PDF [3372 KB, uploaded 3 August 2016]   |  

Abstract

3D hydrological modeling was performed, using CATHY (acronym for CATchment HYdrology model), with the basic objective of checking whether the model could reproduce the effects of subsurface agricultural drainage on stream flows and soil water storage. The model was also used to further our understanding of the impact of soil hydrodynamic properties on watershed hydrology. Flows simulated by CATHY were consistent with traditional subsurface drainage approaches and, for wet years, flows at the outlet of the study watershed corroborated well with observed data. Temporal storage variation analyses illustrated that flows depended not only on the amount of rainfall, but also on its distribution throughout the year. Subsurface agricultural drainage increased base and total flows, and decreased peak flows. Hydrograph separation using simulated results indicated that exfiltration was the most dominant process; peak flows were largely characterized by overland flow; and subsurface drain flow variations were low. View Full-Text
Keywords: CATHY model; subsurface drainage; storage variation; exfiltration; infiltration; overland flow; outlet flow; peak flow; base flow; total flow CATHY model; subsurface drainage; storage variation; exfiltration; infiltration; overland flow; outlet flow; peak flow; base flow; total flow
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Muma, M.; Rousseau, A.N.; Gumiere, S.J. Assessment of the Impact of Subsurface Agricultural Drainage on Soil Water Storage and Flows of a Small Watershed. Water 2016, 8, 326.

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