Using operational data to estimate the reliable yields of water-supply wells |
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| Authors: | Bruce DR Misstear Sarah Beeson |
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| Institution: | (1) Department of Civil, Structural and Environmental Engineering, Trinity College (University of Dublin), Dublin 2, Ireland Fax: +353-1-677-3072 e-mail: bmisster@tcd.ie, IE;(2) Mott MacDonald, Demeter House, Station Road, Cambridge CB1 2RS, UK, GB |
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| Abstract: | The reliable yield of a water-supply well depends on many different factors, including the properties of the well and the
aquifer; the capacities of the pumps, raw-water mains, and treatment works; the interference effects from other wells; and
the constraints imposed by abstraction licences, water quality, and environmental issues. A relatively simple methodology
for estimating reliable yields has been developed that takes into account all of these factors. The methodology is based mainly
on an analysis of water-level and source-output data, where such data are available. Good operational data are especially
important when dealing with wells in shallow, unconfined, fissure-flow aquifers, where actual well performance may vary considerably
from that predicted using a more analytical approach. Key issues in the yield-assessment process are the identification of
a deepest advisable pumping water level, and the collection of the appropriate well, aquifer, and operational data. Although
developed for water-supply operators in the United Kingdom, this approach to estimating the reliable yields of water-supply
wells using operational data should be applicable to a wide range of hydrogeological conditions elsewhere.
Received, September 1998/Revised, May 1999, September 1999/Accepted, October 1999 |
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| Keywords: | well performance analytical solutions reliable yield water supply |
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