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Well flow and dilution measurements for characterization of vertical hydraulic conductivity structure of a carbonate aquifer

Alison H. Parker, L. Jared West and Noelle E. Odling
Well flow and dilution measurements for characterization of vertical hydraulic conductivity structure of a carbonate aquifer
Quarterly Journal of Engineering Geology and Hydrogeology (September 2018) 52 (1): 74-82

Abstract

The paper aims to characterize vertical variations in horizontal hydraulic properties in a fractured carbonate aquifer, the Cretaceous Chalk in East Yorkshire, UK. Two approaches are used: an inverse model of well flow applied to flow logs of pumped open wells, and open well dilution testing. In this case study, transmissivity in the unconfined part of the aquifer is dominated by the highly permeable zone of water table fluctuation, where carbonate dissolution has occurred enhancing fracture aperture; a similar enhanced permeability zone is present at the top of the aquifer where it is confined beneath glacial deposits, although periglacial physical weathering during Quaternary cold periods, rather than carbonate dissolution, is responsible. The aquifer is also shown to contain deeper permeable horizons of stratigraphic origin, which are better developed in the unconfined section.


ISSN: 1470-9236
EISSN: 2041-4803
Serial Title: Quarterly Journal of Engineering Geology and Hydrogeology
Serial Volume: 52
Serial Issue: 1
Title: Well flow and dilution measurements for characterization of vertical hydraulic conductivity structure of a carbonate aquifer
Affiliation: Cranfield University, Cranfield Water Science Institute, Cranfield, United Kingdom
Pages: 74-82
Published: 20180919
Text Language: English
Publisher: Geological Society of London, London, United Kingdom
References: 42
Accession Number: 2018-080185
Categories: Hydrogeology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 3 tables, geol. sketch maps
N53°19'60" - N54°40'00", W02°30'00" - E00°10'00"
Country of Publication: United Kingdom
Secondary Affiliation: GeoRef, Copyright 2019, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States. Reference includes data from The Geological Society, London, London, United Kingdom
Update Code: 201844
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