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Article: Investigation of Possible Extra Recharge during Pumping in Nottingham Aquifer

TitleInvestigation of Possible Extra Recharge during Pumping in Nottingham Aquifer
Authors
Issue Date1996
PublisherBlackwell Publishing, Inc. The Journal's web site is located at http://www.blackwellpublishing.com/journal.asp?ref=0017-467X&site=1
Citation
Ground Water, 1996, v. 34 n. 5, p. 795-800 How to Cite?
AbstractApproaches to investigate possible recharge during a pumping test period are demonstrated by analyzing the pumping test data from the Nottingham aquifer, UK. The pumping lasted more than 200 days and the data for different observed periods are used to obtain aquifer parameters. If recharge is ignored, estimated transmissivities and storativities change progressively with the observation time. This indicates that a gradually added new source may be involved. Then the observed data in both pumping and recovery periods at one of the pumping sites are matched by the data calculated from the Theis equation. The match is very good except near the end of the recovery period. It shows that the real drawdown recovered more quickly than predicted by the model, indicating that the aquifer obtained extra recharge from other sources. The match between the observation and the model is improved by including a fixed-head boundary or leakage in the model. The recharge to the aquifer is estimated to be 19% and 34% of the pumpage at the end of pumping, depending on the method used. The real source of the additional recharge is not clear; it could be from the surface water in the unconfined area, the storage of the aquitard, the compaction of the aquitard, or a combination of the three. This requires further hydrogeological investigation.
Persistent Identifierhttp://hdl.handle.net/10722/150987
ISSN
2015 Impact Factor: 1.947
2015 SCImago Journal Rankings: 1.111
References

 

DC FieldValueLanguage
dc.contributor.authorJiao, JJen_US
dc.date.accessioned2012-06-26T06:15:33Z-
dc.date.available2012-06-26T06:15:33Z-
dc.date.issued1996en_US
dc.identifier.citationGround Water, 1996, v. 34 n. 5, p. 795-800en_US
dc.identifier.issn0017-467Xen_US
dc.identifier.urihttp://hdl.handle.net/10722/150987-
dc.description.abstractApproaches to investigate possible recharge during a pumping test period are demonstrated by analyzing the pumping test data from the Nottingham aquifer, UK. The pumping lasted more than 200 days and the data for different observed periods are used to obtain aquifer parameters. If recharge is ignored, estimated transmissivities and storativities change progressively with the observation time. This indicates that a gradually added new source may be involved. Then the observed data in both pumping and recovery periods at one of the pumping sites are matched by the data calculated from the Theis equation. The match is very good except near the end of the recovery period. It shows that the real drawdown recovered more quickly than predicted by the model, indicating that the aquifer obtained extra recharge from other sources. The match between the observation and the model is improved by including a fixed-head boundary or leakage in the model. The recharge to the aquifer is estimated to be 19% and 34% of the pumpage at the end of pumping, depending on the method used. The real source of the additional recharge is not clear; it could be from the surface water in the unconfined area, the storage of the aquitard, the compaction of the aquitard, or a combination of the three. This requires further hydrogeological investigation.en_US
dc.languageengen_US
dc.publisherBlackwell Publishing, Inc. The Journal's web site is located at http://www.blackwellpublishing.com/journal.asp?ref=0017-467X&site=1en_US
dc.relation.ispartofGround Wateren_US
dc.titleInvestigation of Possible Extra Recharge during Pumping in Nottingham Aquiferen_US
dc.typeArticleen_US
dc.identifier.emailJiao, JJ: jjiao@hku.hken_US
dc.identifier.authorityJiao, JJ=rp00712en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.scopuseid_2-s2.0-0030241602en_US
dc.identifier.hkuros26141-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0030241602&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume34en_US
dc.identifier.issue5en_US
dc.identifier.spage795en_US
dc.identifier.epage800en_US
dc.publisher.placeUnited Statesen_US
dc.identifier.scopusauthoridJiao, JJ=7102382963en_US

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