Monitoring of aquifer pump tests with Magnetic Resonance Sounding (MRS)

Daan Herckenrath, Esben Auken, Peter Bauer-Gottwein

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Abstract

Magnetic Resonance Sounding (MRS) can provide valuable data to constrain and calibrate groundwater flow and transport models. With this non-invasive geophysical technique, field measurements of water content and hydraulic conductivities can be obtained. We developed a hydrogeophyiscal forward method, which calculates the MRS-signal generated by an aquifer pump test. A synthetic MRS-dataset was subsequently used to determine the hydrogeological parameters in an inverse parameter estimation approach. This was done for a pump test with a partially and fully penetrating well. With the MRS data we were able to retrieve the hydrogeological parameters of the aquifer. However, the differences in MRS signal in time, when the instrument is positioned on top of the extraction well, were small compared to the electromagnetic noise. This could especially limit the applicability of the MRS technique to pump tests in which a partially penetrating pumping well is used, because the limited drawdown around the extraction well causes smaller changes in received signal compared to a fully penetrating well.
Original languageEnglish
Title of host publicationCALIBRATION AND RELIABILITY IN GROUNDWATER MODELING : MANAGING GROUNDWATER AND THE ENVIRONMENT
PublisherChina University of Geosciences Press
Publication date2009
Pages507-510
ISBN (Print)978-7-5625-2417-5
Publication statusPublished - 2009
Event7th International Conference on Calibration and Reliability in Groundwater Modeling - Wuhan, China
Duration: 20 Sep 200923 Sep 2009
Conference number: 7

Conference

Conference7th International Conference on Calibration and Reliability in Groundwater Modeling
Number7
CountryChina
CityWuhan
Period20/09/200923/09/2009

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