Direct and indirect methods for groundwater investigations: A case-study of MRS and VES in the southern part of Sweden

Wattanasen, Kamhaeng; Elming, Sten-åke

doi:10.1016/j.jappgeo.2008.04.005

Cited by 33 publications

(4 citation statements)

References 15 publications

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“…Furthermore, with the development of new methods of investigation and with the improvement in the pre-existing techniques and instrumentation, geophysical investigations have acquired a crucial role for the knowledge and characterization of underground coastal aquifers [26][27][28][29][30][31][32][33], especially regarding water pollution detection [34,35] and seawater intrusion [15,28,[36][37][38][39][40]. Different seismic methodologies have been used to improve the definition of geometric features of the underground aquifers, also resolving some ambiguities about the subsurface geological structures deduced from geoelectrical investigation in particular environments, such as coastal areas [41,42].…”

Section: Introductionmentioning

confidence: 99%

Geophysical Constraints to Reconstructing the Geometry of a Shallow Groundwater Body in Caronia (Sicily)

Canzoneri,

Capizzi,

Martorana

et al. 2023

Water

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The characterization of a groundwater body involves the construction of a conceptual model that constitutes the base knowledge for monitoring programs, hydrogeological risk assessment, and correct management of water resources. In particular, a detailed geological and geophysical approach was applied to define the alluvial Caronia Groundwater Body (CGWB) and to reconstruct a hydrogeological flow model. The analysis of the CGWB, located in north-eastern Sicily, was initially approached through a reanalysis of previous stratigraphic (boreholes) and geophysical (vertical electrical soundings and seismic refraction profiles) data, subsequently integrated by new seismic acquisitions, such as Multichannel Analysis of Surface Waves (MASW) and horizontal-to-vertical seismic ratio (HVSR). The analysis and reinterpretation of geoelectrical data allowed the construction of a preliminary 3D resistivity model. This initial modeling was subsequently integrated by a geophysical data campaign in order to define the depth of the bottom of the shallow CGWB and the thickness of alluvial deposits. Finally, a preliminary mathematical model flow was generated in order to reconstruct the dynamics of underground water. The results show that integration of multidisciplinary data represent an indispensable tool for the characterization of complex physical systems.

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Section: Introductionmentioning

confidence: 99%

Geophysical Constraints to Reconstructing the Geometry of a Shallow Groundwater Body in Caronia (Sicily)

Canzoneri,

Capizzi,

Martorana

et al. 2023

Water

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“…Surface water resources are usually easy to access and could serve as the most convenient way to mitigate water crises and demand. Despite the ease of reach of surface waters, they are not dependable as they have a tendency to be evaporated in high-temperate regions and are commonly prone to pollution and waterborne diseases [4], hence making groundwater an appropriate solution to the need for quality water [5]. External pollutants rarely affect groundwater as earth materials serve as a filter for the water that permeates through it [6].…”

Section: Introductionmentioning

confidence: 99%

Geophysical Investigation of Groundwater Potentials of the Nanka Sand in Obosi and Its Environs, Anambra State Nigeria

Nwobi¹,

Okeke²,

Didi³

et al. 2022

JWARP

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Geophysical investigation for Groundwater which entails the use of vertical electrical sounding (VES) methods was carried out in parts of the Idemili area of Anambra State, Nigeria. Geologically the study area falls within the Nanka Sand, belonging to the Ameki Group in the Tertiary Niger Delta Basin. The investigation intends amongst others to assess the groundwater potential of the area, find out the existence of possible aquifer(s) within the area, and estimate the possible depth of a borehole. 15 VES stations were established at the site using Ohmega System Tetrameter and Schlumberger electrode configuration with current electrode spacing (AB/2) of 350 meters. The geologic parameters, such as the number of geo-electric layers, the thickness of the geo-electric units, and their resistivities were interpreted from the VES curves. A qualitative assessment of the curves shows that a model with 5 layers would sufficiently model the field curves. The thickness value ranged from 0.1 to 86 m, the resistivity ranged from 258 to 13,258 Ωm, and the depth ranged between 1.2 and 109 m. Quantitative interpretation of field curves involved inversion with appropriate parameters using Zond Res1D software.

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“…Legchenko et al [ 8 ] presented the basic principles of the MRS method based on numerical modelling and field examples. Wattanasen et al [ 9 ] succeeded in detecting groundwater using MRS techniques in two areas in southern Sweden. Moreover, Cristina Pérez-Bielsa [ 10 ], Boucher [ 11 ], Chalikakis [ 12 ], and others have made outstanding contributions to the application of MRS in groundwater exploration.…”

Section: Introductionmentioning

confidence: 99%

Response Characteristics and Experimental Study of Underground Magnetic Resonance Sounding Using a Small-Coil Sensor

Qin

Jiang

et al. 2017

Sensors

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Due to its unique sensitivity to hydrogen protons, magnetic resonance sounding (MRS) is the only geophysical method that directly detects water and can provide nondestructive information on subsurface aquifer properties. The relationship between the surface MRS signal and the location and characteristics of aquifers using large-coil (typically 50–150 m) sensors has been discussed based on forward modelling and experiments. However, few researchers have studied underground MRS using a small-coil sensor. In this paper, a parametric study and a large-scale physical model test were conducted to shed light on the critical response characteristics of underground MRS using a small-coil sensor. The effects of the size and number of turns of the transmitter coil and receiver coil, the geomagnetic declination, the geomagnetic inclination, and the position, thickness, and water content of a water-bearing structure on the performance of the underground MRS were studied based on numerical simulations. Furthermore, we derived the kernel function and underground MRS signal curves for a water-bearing structure model based on the simulations. Finally, a large-scale physical model test on underground MRS using a small-coil sensor was performed using a physical test system for geological prediction of tunnels at Shandong University. The results show that the inversion results of the physical model test were in good agreement with the physical prototype results. Using both numerical modeling and physical model tests, this study showed that underground MRS using a small-coil sensor can be used to predict water-bearing structures in underground engineering.

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Direct and indirect methods for groundwater investigations: A case-study of MRS and VES in the southern part of Sweden

Cited by 33 publications

References 15 publications

Geophysical Constraints to Reconstructing the Geometry of a Shallow Groundwater Body in Caronia (Sicily)

Geophysical Constraints to Reconstructing the Geometry of a Shallow Groundwater Body in Caronia (Sicily)

Geophysical Investigation of Groundwater Potentials of the Nanka Sand in Obosi and Its Environs, Anambra State Nigeria

Response Characteristics and Experimental Study of Underground Magnetic Resonance Sounding Using a Small-Coil Sensor

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