Watertable waves in unconfined aquifers: sloping boundary effects

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Title Watertable waves in unconfined aquifers: sloping boundary effects
Author Cartwright, Nicholas Brian; Nielsen, P.; Li, L.; Callaghan, D P
Editor P. Kench & T. Hume
Year Published 2003
Place of publication Auckland, New Zealand
Publisher IPENZ
Abstract Watertable waves generated by forcing from oceanic oscillations play an important role in the availability and quality of coastal groundwater resources. Here we present results from laboratory experiments which examine the influence of a boundary slope on the mass transfer from an oscillating clear water reservoir into a homogeneous, unconfined aquifer. The experimental forcing period is sufficiently short (T = 348sec) to expose limitations of theories based on the simplifying assumptions of a shallow aquifer (hydrostatic pressure) free of any influence from the capillary fringe above the watertable. A new, small amplitude perturbation solution to the linearised Boussinesq equation is derived, taking into account a sloping boundary to an aquifer finite in depth and influenced by capillarity. However, discrepancies between the experimental observations and theory still exist, suggesting other contributing mechanisms. The influence of a truncated capillary fringe is suggested as a possible mechanism and warrants further investigation.
Peer Reviewed Yes
Published Yes
Publisher URI http://www.ipenz.org.nz/ipenz/
Copyright Statement Copyright 2003 IPENZ. The attached file is posted here in accordance with the copyright policy of the publisher, for your personal use only. No further distribution permitted. Use hypertext link for access to publisher's website.
ISBN 0-473-09832-6
Publication Title Proc. Coasts and Ports 2003, 16th Australasian Coastal and Ocean Engineering Conf.
Conference name Coasts and Ports 2003, 16th Australasian Coastal and Ocean Engineering Conf.
Location Auckland, New Zealand
Date From 2003-09-09
Date To 2003-09-12
URI http://hdl.handle.net/10072/23075
Date Accessioned 2006-07-10
Date Available 2009-09-11T04:57:12Z
Language en_AU
Research Centre Centre for Infrastructure Engineering and Management
Faculty Faculty of Engineering and Information Technology
Subject PRE2009-Groundwater Hydrology
Publication Type Conference Publications (Full Written Paper - Refereed)
Publication Type Code e1x

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