Application of a coupled ground-surface water flow model to simulate periodic groundwater flow influenced by a sloping boundary, capillarity and vertical flows

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Title Application of a coupled ground-surface water flow model to simulate periodic groundwater flow influenced by a sloping boundary, capillarity and vertical flows
Author Cartwright, Nicholas Brian; Jessen, Oluf Z.; Nielsen, Peter
Journal Name Environmental Modelling & Software
Year Published 2006
Place of publication UK
Publisher Pergamon
Abstract Theoretical developments as well as field and laboratory data have shown the influence of the capillary fringe on water table fluctuations to increase with the fluctuation frequency. The numerical solution of a full, partially saturated flow equation can be computationally expensive. In this paper, the influence of the capillary fringe on water table fluctuations is simplified through its parameterisation into the storage coefficient of a fully-saturated groundwater flow model using the complex effective porosity concept [Nielsen, P., Perrochet, P., 2000. Water table dynamics under capillary fringes: experiments and modelling. Advances in Water Resources 23 (1), 503–515; Nielsen, P., Perrochet, P., 2000. ERRATA: water table dynamics under capillary fringes: experiments and modelling (Advances in Water Resources 23 (2000) 503–515). Advances in Water Resources 23, 907–908]. The model is applied to sand flume observations of periodic water table fluctuations induced by simple harmonic forcing across a sloping boundary, analogous to many beach groundwater systems. While not providing information on the moisture distribution within the aquifer, this approach can reasonably predict the water table fluctuations in response to periodic forcing across a sloping boundary. Furthermore, the coupled ground-surface water model accurately predicts the extent of the seepage face formed at the sloping boundary.
Peer Reviewed Yes
Published Yes
Publisher URI http://www.elsevier.com/wps/find/journaldescription.cws_home/422921/description#description
Alternative URI http://dx.doi.org/10.1016/j.envsoft.2005.02.005
Volume 21
Issue Number 6
Page from 770
Page to 778
ISSN 1364-8152
Date Accessioned 2006-01-20
Date Available 2009-01-20T06:12:35Z
Language en_AU
Research Centre Centre for Infrastructure Engineering and Management
Faculty Faculty of Science, Environment, Engineering and Technology
Subject PRE2009-Groundwater Hydrology
URI http://hdl.handle.net/10072/14470
Publication Type Journal Articles (Refereed Article)
Publication Type Code c1

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