Please use this identifier to cite or link to this item: https://doi.org/10.1016/S0309-1708(98)00038-4
Title: Analysis of continuous and pulsed pumping of a phreatic aquifer
Authors: Zhang, H. 
Baray, D.A.
Hocking, G.C.
Keywords: Capillary fringe
Free surface
Hele-Shaw model
Pulsed pumping
Issue Date: 24-Feb-1999
Source: Zhang, H., Baray, D.A., Hocking, G.C. (1999-02-24). Analysis of continuous and pulsed pumping of a phreatic aquifer. Advances in Water Resources 22 (6) : 623-632. ScholarBank@NUS Repository. https://doi.org/10.1016/S0309-1708(98)00038-4
Abstract: In a phreatic aquifer, fresh water is withdrawn by pumping from a recovery well. As is the case here, the interfacial surface (air/water) is typically assumed to be a sharp boundary between the regions occupied by each fluid. The pumping efficiency depends on the method by which the fluid is withdrawn. We consider the efficiency of both continuous and pulsed pumping. The maximum steady pumping rate, above which the undesired fluid will break through into the well, is defined as critical pumping rate. This critical rate can be determined analytically using an existing solution based on the hodograph method, while a Boundary Element Method is applied to examine a high flow rate, pulsed pumping strategy in an attempt to achieve more rapid withdrawal. A modified kinematic interface condition, which incorporates the effect of capillarity, is used to simulate the fluid response of pumping. It is found that capillarity influences significantly the relationship between the pumping frequency and the fluid response. A Hele-Shaw model is set up for experimental verification of the analytical and numerical solutions in steady and unsteady cases for pumping of a phreatic aquifer. When capillarity is included in the numerical model, close agreement is found in the computed and observed phreatic surfaces. The same model without capillarity predicts the magnitude of the free surface fluctuation induced by the pulsed pumping, although the phase of the fluctuation is incorrect.
Source Title: Advances in Water Resources
URI: http://scholarbank.nus.edu.sg/handle/10635/65133
ISSN: 03091708
DOI: 10.1016/S0309-1708(98)00038-4
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

SCOPUSTM   
Citations

16
checked on Jan 17, 2018

WEB OF SCIENCETM
Citations

13
checked on Nov 22, 2017

Page view(s)

17
checked on Jan 14, 2018

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.