Details
| Original language | English |
|---|---|
| Article number | e20138 |
| Journal | Vadose zone journal |
| Volume | 20 |
| Issue number | 5 |
| Early online date | 26 Jul 2021 |
| Publication status | Published - 25 Sept 2021 |
| Externally published | Yes |
Abstract
In the past few years, small-scale (2 m) prepolarized surface nuclear magnetic resonance (SNMR) has gained increasing interest in the research community. As recent studies demonstrated, the application of a strong prepolarization field enhances the SNMR signal of coils with a footprint <1 m2 up to a level that even enables investigations in urban areas. In particular, it is expected that this noninvasive method provides the soil moisture distribution in the upper 2 m of the subsurface in the near future. However, until now all field experiments have been carried out on water reservoirs only, in an approach to test and implement this rather new technique into the field of SNMR applications. We present the first prepolarized SNMR measurement on a real soil and demonstrate the general feasibility of this technique to qualitatively and quantitatively detect soil moisture in the upper first 0.5 m. Our soil moisture measurements are validated by independent time domain reflectometry data. To complement the field experiments with numerical simulations, we adapted the underlying SNMR spin dynamics simulations and account for prepolarization switch-off effects in the forward modeling of the SNMR excitation.
ASJC Scopus subject areas
- Agricultural and Biological Sciences(all)
- Soil Science
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In: Vadose zone journal, Vol. 20, No. 5, e20138, 25.09.2021.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Feasibility study on prepolarized surface nuclear magnetic resonance for soil moisture measurements
AU - Hiller, Thomas
AU - Costabel, Stephan
AU - Radić, Tino
AU - Dlugosch, Raphael
AU - Müller-Petke, Mike
N1 - Funding information: We like to thank the associate editor and two anonymous reviewers for their valuable comments. Furthermore, we thank Kai Holtappels from the German Federal Institute for Materials Research and Testing for providing the necessary logistics to conduct our field experiments. We also like to thank Florian Stange and Axel Lamparter from the German Federal Institute for Geosciences and Natural Resources for providing us with the TDR equipment. This work was supported by the German Research Foundation under the grant MU 3318/4?1. We like to thank the associate editor and two anonymous reviewers for their valuable comments. Furthermore, we thank Kai Holtappels from the German Federal Institute for Materials Research and Testing for providing the necessary logistics to conduct our field experiments. We also like to thank Florian Stange and Axel Lamparter from the German Federal Institute for Geosciences and Natural Resources for providing us with the TDR equipment. This work was supported by the German Research Foundation under the grant MU 3318/4-1.
PY - 2021/9/25
Y1 - 2021/9/25
N2 - In the past few years, small-scale (2 m) prepolarized surface nuclear magnetic resonance (SNMR) has gained increasing interest in the research community. As recent studies demonstrated, the application of a strong prepolarization field enhances the SNMR signal of coils with a footprint <1 m2 up to a level that even enables investigations in urban areas. In particular, it is expected that this noninvasive method provides the soil moisture distribution in the upper 2 m of the subsurface in the near future. However, until now all field experiments have been carried out on water reservoirs only, in an approach to test and implement this rather new technique into the field of SNMR applications. We present the first prepolarized SNMR measurement on a real soil and demonstrate the general feasibility of this technique to qualitatively and quantitatively detect soil moisture in the upper first 0.5 m. Our soil moisture measurements are validated by independent time domain reflectometry data. To complement the field experiments with numerical simulations, we adapted the underlying SNMR spin dynamics simulations and account for prepolarization switch-off effects in the forward modeling of the SNMR excitation.
AB - In the past few years, small-scale (2 m) prepolarized surface nuclear magnetic resonance (SNMR) has gained increasing interest in the research community. As recent studies demonstrated, the application of a strong prepolarization field enhances the SNMR signal of coils with a footprint <1 m2 up to a level that even enables investigations in urban areas. In particular, it is expected that this noninvasive method provides the soil moisture distribution in the upper 2 m of the subsurface in the near future. However, until now all field experiments have been carried out on water reservoirs only, in an approach to test and implement this rather new technique into the field of SNMR applications. We present the first prepolarized SNMR measurement on a real soil and demonstrate the general feasibility of this technique to qualitatively and quantitatively detect soil moisture in the upper first 0.5 m. Our soil moisture measurements are validated by independent time domain reflectometry data. To complement the field experiments with numerical simulations, we adapted the underlying SNMR spin dynamics simulations and account for prepolarization switch-off effects in the forward modeling of the SNMR excitation.
UR - http://www.scopus.com/inward/record.url?scp=85111366759&partnerID=8YFLogxK
U2 - 10.1002/vzj2.20138
DO - 10.1002/vzj2.20138
M3 - Article
AN - SCOPUS:85111366759
VL - 20
JO - Vadose zone journal
JF - Vadose zone journal
SN - 1539-1663
IS - 5
M1 - e20138
ER -