Imaging of groundwater with nuclear magnetic resonance

M Hertrich - Progress in Nuclear Magnetic Resonance …, 2008 - Elsevier
The method of surface nuclear magnetic resonance (SNMR) is a relatively new geophysical
technique that exploits the NMR-phenomenon for a quantitative determination of the sub …

Theory of surface nuclear magnetic resonance with applications to geophysical imaging problems

PB Weichman, EM Lavely, MH Ritzwoller - Physical Review E, 2000 - APS
The general theory of nuclear magnetic resonance (NMR) imaging of large
electromagnetically active systems is considered. We emphasize particularly noninvasive …

Pore size distributions and hydraulic conductivities of rocks derived from magnetic resonance sounding relaxation data using multi-exponential decay time inversion

O Mohnke, U Yaramanci - Journal of Applied Geophysics, 2008 - Elsevier
In hydrogeology there is a variety of empirical formulae available for determination of
hydraulic conductivity of porous media, all based on the analysis of grain size distributions of …

Smooth and block inversion of surface NMR amplitudes and decay times using simulated annealing

O Mohnke, U Yaramanci - Journal of Applied Geophysics, 2002 - Elsevier
This paper introduces a new 1-D inversion scheme for surface nuclear magnetic resonance
(SNMR) amplitudes and decay times, using the optimized random search algorithm …

Magnetic resonance soundings with separated transmitter and receiver loops

M Hertrich, M Braun, U Yaramanci - Near Surface Geophysics, 2005 - Wiley Online Library
Triggered by an extended mathematical formulation of the response signal for magnetic
resonance soundings (MRS), which allows the treatment of individual transmitter and …

Study on complex inversion of magnetic resonance sounding signals

M Braun, M Hertrich, U Yaramanci - Near Surface Geophysics, 2005 - Wiley Online Library
Magnetic resonance sounding (MRS), also known as surface nuclear magnetic resonance
(SNMR), is used for non‐invasive direct groundwater determination and aquifer …

Application of magnetic resonance sounding to tunnels for advanced detection of water-related disasters: A case study in the Dadushan Tunnel, Guizhou, China

S Qin, Z Ma, C Jiang, J Lin, M Bai, T Lin, X Yi… - … and Underground Space …, 2019 - Elsevier
Abstract The Dadushan Tunnel, which is located in the southwestern karst region of China in
Guizhou Province, is one of the key elements of the Hukun High-Speed Railway. Cavities …

Two‐dimensional distribution of relaxation time and water content from surface nuclear magnetic resonance

R Dlugosch, T Günther, M Müller‐Petke… - Near Surface …, 2014 - Wiley Online Library
Development in instrumentation and data analysis of surface nuclear magnetic resonance
has recently moved on from one‐dimensional (1D) soundings to two‐dimensional (2D) …

Study of surface nuclear magnetic resonance inverse problems

PB Weichman, DR Lun, MH Ritzwoller… - Journal of Applied …, 2002 - Elsevier
Motivated by the recent application of the Earth-field nuclear magnetic resonance (NMR)
technique to the detection and map** of subsurface groundwater (to depths of 100 m or …

Low‐frequency electromagnetic exploration for groundwater on Mars

RE Grimm - Journal of Geophysical Research: Planets, 2002 - Wiley Online Library
Water with even a small amount of dissolved solids has an electrical conductivity orders of
magnitude higher than dry rock and is therefore a near‐ideal exploration target on Mars for …