Parker, AH, West, LJ, Odling, NE et al. (1 more author) (2010) A forward modeling approach for interpreting impeller flow logs. Ground Water, 48 (1). 79 - 91 . ISSN 0017-467X
Abstract
A rigorous and practical approach for interpretation of impeller flow log data to determine vertical variations in hydraulic conductivity is presented and applied to two well logs from a Chalk aquifer in England. Impeller flow logging involves measuring vertical flow speed in a pumped well and using changes in flow with depth to infer the locations and magnitudes of inflows into the well. However, the measured flow logs are typically noisy, which leads to spurious hydraulic conductivity values where simplistic interpretation approaches are applied. In this study, a new method for interpretation is presented, which first defines a series of physical models for hydraulic conductivity variation with depth and then fits the models to the data, using a regression technique. Some of the models will be rejected as they are physically unrealistic. The best model is then selected from the remaining models using a maximum likelihood approach. This balances model complexity against fit, for example, using Akaike's Information Criterion.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Keywords: | hydraulic conductivity, aquifer, flowmeter, parameters, profiles, tests |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Environment (Leeds) > School of Earth and Environment (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 17 May 2013 10:36 |
Last Modified: | 04 Nov 2016 02:51 |
Published Version: | http://dx.doi.org/10.1111/j.1745-6584.2009.00600.x |
Status: | Published |
Publisher: | Wiley Blackwell |
Refereed: | Yes |
Identification Number: | 10.1111/j.1745-6584.2009.00600.x |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:75548 |