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Coupled hydrogeophysical inversion using time-lapse magnetic resonance sounding and time-lapse gravity data for hydraulic aquifer testing: Will it work in practice?. / Herckenrath, Daan; Auken, Esben; Christiansen, Lars; Behroozmand, Ahmad A.; Bauer-Gottwein, Peter.

In: Water Resources Research, Vol. 48, No. 1, 2012, p. W01539.

Publication: Research - peer-reviewJournal article – Annual report year: 2012

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Herckenrath, Daan; Auken, Esben; Christiansen, Lars; Behroozmand, Ahmad A.; Bauer-Gottwein, Peter / Coupled hydrogeophysical inversion using time-lapse magnetic resonance sounding and time-lapse gravity data for hydraulic aquifer testing: Will it work in practice?.

In: Water Resources Research, Vol. 48, No. 1, 2012, p. W01539.

Publication: Research - peer-reviewJournal article – Annual report year: 2012

Bibtex

@article{b36b8e38267048d296c288810b687ead,
title = "Coupled hydrogeophysical inversion using time-lapse magnetic resonance sounding and time-lapse gravity data for hydraulic aquifer testing: Will it work in practice?",
publisher = "American Geophysical Union",
author = "Daan Herckenrath and Esben Auken and Lars Christiansen and Behroozmand, {Ahmad A.} and Peter Bauer-Gottwein",
year = "2012",
doi = "10.1029/2011WR010411",
volume = "48",
number = "1",
pages = "W01539",
journal = "Water Resources Research",
issn = "0043-1397",

}

RIS

TY - JOUR

T1 - Coupled hydrogeophysical inversion using time-lapse magnetic resonance sounding and time-lapse gravity data for hydraulic aquifer testing: Will it work in practice?

A1 - Herckenrath,Daan

A1 - Auken,Esben

A1 - Christiansen,Lars

A1 - Behroozmand,Ahmad A.

A1 - Bauer-Gottwein,Peter

AU - Herckenrath,Daan

AU - Auken,Esben

AU - Christiansen,Lars

AU - Behroozmand,Ahmad A.

AU - Bauer-Gottwein,Peter

PB - American Geophysical Union

PY - 2012

Y1 - 2012

N2 - Temporal changes in water content can be directly related to the time-lapse signals retrieved using magnetic resonance sounding (TL-MRS) and relative gravimetry (TL-RG). Previous studies suggest that TL-RG measurements can potentially provide accurate estimates of aquifer characteristics in an aquifer pumping test experiment when used in a coupled hydrogeophysical inversion approach. However, these studies considered highly idealized conditions. The aim of this paper is twofold: first, we investigate three major issues which likely limit the practical utility of TL-RG for pumping test monitoring: partially penetrating pumping wells in anisotropic aquifers, delayed drainage effects, and typical data errors for TL-RG. Second, we introduce TL-MRS in a similar coupled hydrogeophysical inversion framework and compare the performance of TL-MRS and TL-RG for pumping test monitoring. For this purpose we consider a virtual pumping test, for which we generate synthetic drawdown, TL-MRS and TL-RG observations, and subsequently determine the aquifer parameters in an inverse parameter estimation approach. The inclusion of TL-RG and TL-MRS data did slightly improve parameter estimates for the specific yield and hydraulic conductivity when considering a fully penetrating well and minimal data error. Using more conservative TL-RG and TL-MRS data error estimates according our own field experience strongly limited the informative value of the TL-RG data; TL-MRS data was less affected by this. For a partially penetrating well under anisotropic conditions, parameter uncertainty could be reduced more effectively compared to a fully penetrating well. Delayed drainage effects did not limit the ability of the TL-MRS and TL-RG data to reduce parameter uncertainty significantly. The incorporation of representative measurement error correlation in the TL-RG data did not affect its informative value. A local sensitivity analysis showed that observations were most sensitive to the pumping rate and the thickness, specific yield, and hydraulic conductivity of the aquifer. The inclusion of TL-MRS data proved to be more effective to constrain the aquifer parameters compared with TL-RG. The inclusion of both TL-RG and TL-MRS had limited added value compared to TL-MRS only. We conclude that this particular application of coupled hydrogeophysical inversion has limited potential for TL-RG, while TL-MRS appears to be a more promising method. Copyright 2012 by the American Geophysical Union.

AB - Temporal changes in water content can be directly related to the time-lapse signals retrieved using magnetic resonance sounding (TL-MRS) and relative gravimetry (TL-RG). Previous studies suggest that TL-RG measurements can potentially provide accurate estimates of aquifer characteristics in an aquifer pumping test experiment when used in a coupled hydrogeophysical inversion approach. However, these studies considered highly idealized conditions. The aim of this paper is twofold: first, we investigate three major issues which likely limit the practical utility of TL-RG for pumping test monitoring: partially penetrating pumping wells in anisotropic aquifers, delayed drainage effects, and typical data errors for TL-RG. Second, we introduce TL-MRS in a similar coupled hydrogeophysical inversion framework and compare the performance of TL-MRS and TL-RG for pumping test monitoring. For this purpose we consider a virtual pumping test, for which we generate synthetic drawdown, TL-MRS and TL-RG observations, and subsequently determine the aquifer parameters in an inverse parameter estimation approach. The inclusion of TL-RG and TL-MRS data did slightly improve parameter estimates for the specific yield and hydraulic conductivity when considering a fully penetrating well and minimal data error. Using more conservative TL-RG and TL-MRS data error estimates according our own field experience strongly limited the informative value of the TL-RG data; TL-MRS data was less affected by this. For a partially penetrating well under anisotropic conditions, parameter uncertainty could be reduced more effectively compared to a fully penetrating well. Delayed drainage effects did not limit the ability of the TL-MRS and TL-RG data to reduce parameter uncertainty significantly. The incorporation of representative measurement error correlation in the TL-RG data did not affect its informative value. A local sensitivity analysis showed that observations were most sensitive to the pumping rate and the thickness, specific yield, and hydraulic conductivity of the aquifer. The inclusion of TL-MRS data proved to be more effective to constrain the aquifer parameters compared with TL-RG. The inclusion of both TL-RG and TL-MRS had limited added value compared to TL-MRS only. We conclude that this particular application of coupled hydrogeophysical inversion has limited potential for TL-RG, while TL-MRS appears to be a more promising method. Copyright 2012 by the American Geophysical Union.

UR - http://www.agu.org.globalproxy.cvt.dk/pubs/crossref/2012/2011WR010411.shtml

U2 - 10.1029/2011WR010411

DO - 10.1029/2011WR010411

JO - Water Resources Research

JF - Water Resources Research

SN - 0043-1397

IS - 1

VL - 48

SP - W01539

ER -