Groundwater Potential Assessment Using Geoelectrical Data: A Case Study Of Phuket Island, Thailand

Abstract Groundwater is the dominant source of water supply on Phuket island, Thailand. The water demand on Phuket has been increasing due to rapid urbanization and population growth. A scarcity of freshwater and over-extraction of groundwater may shortly become severe problems for Phuket. Geoelectrical data obtained by Vertical Electric Sounding (VES) were employed in this study to estimate the Dar Zarrouk parameters of the study area. Twenty-four VES stations were set up using Schlumberger configuration with a 1.0 m minimum spacing. The lithology layers from 24 unpublished borehole data indicating each subsurface layer were validated with the resistivity data obtained from VES. The geoelectric profiles gave a maximum of three layers with varying resistivities and thicknesses across each VES station. Two parameters (longitudinal conductance and transverse resistance) of the Dar Zarrouk model were calculated from VES data to generate the thematic maps in a GIS environment, thus the groundwater potential in Phuket Island was represented as a single map by using the weighted overlay technique in ArcGIS, based on both longitudinal conductance and transverse resistance. The groundwater potentials were classified into three potential levels (low, medium, and high). The results reveal that the highest groundwater potential areas are isolated and in specific locations, while the majority of area has medium level groundwater potential. Finally, the low potential zones are in the flank and the top parts of the study area.

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GEOELECTRIC STUDY OF GROUNDWATER REPOSITORY IN PARTS OF AKWA IBOM STATE, SOUTHERN NIGERIA

Water Conservation and Management ◽

10.26480/wcm.02.2020.99.102 ◽

2020 ◽

Vol 4 (2) ◽

pp. 99-102

Author(s):

Johnson C. Ibuot ◽

Moses M. M. Ekpa ◽

Doris O. Okoroh ◽

Aniefiok S. Akpan Emmanuel T. Omeje

Keyword(s):

Hydraulic Conductivity ◽

Groundwater Potential ◽

Vertical Electrical Sounding ◽

Protective Capacity ◽

Longitudinal Conductance ◽

Contour Maps ◽

Transverse Resistance ◽

Southern Nigeria ◽

Electrical Sounding ◽

Dar Zarrouk Parameters

Geoelectric survey employing Vertical Electrical Sounding (VES) was carried out in order to assess the groundwater repositories. A total of seven soundings were obtained with their layer resistivity, thickness and depth within the maximum electrode separation. The geoelectric parameters obtained were used to estimate the Dar-Zarrouk parameters (longitudinal conductance and transverse resistance), hydraulic conductivity and transmissivity. The result shows the aquifer resistivity ranging from 77.14 to 784.76 Ωm, with thickness ranging from 28.78 to 80.04 m. The longitudinal conductance have values ranging from 0.071 to 0.825 Ω-1 while the values of hydraulic conductivity and transmissivity range from 1.087 to 5.881 m/day and 60.180 to 374.031 𝑚2/day respectively. The contour maps generated show the variation of these parameters across the subsurface, and areas with poor protective capacity were delineated. The results also delineate the groundwater potential of the study area as moderate, while the corrosivity rating indicates non-corrosive and slightly corrosive.

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Estimation of Dar-Zarrouk parameters and delineation of groundwater potential zones in Karlahi, part of Adamawa Massif, Northeastern Nigeria

Warta Geologi ◽

10.7186/wg472202101 ◽

2021 ◽

Vol 47 (2) ◽

pp. 103-112

Author(s):

S.N. Yusuf ◽

◽

J.M. Ishaku ◽

W.M. Wakili ◽

◽

...

Keyword(s):

Groundwater Potential ◽

Groundwater Potential Zones ◽

North Central ◽

Longitudinal Conductance ◽

The North ◽

Transverse Resistance ◽

Potential Map ◽

Groundwater Potential Map ◽

Potential Groundwater ◽

Dar Zarrouk Parameters

Karlahi is largely underlain by granites and migmatites gneiss of the Adamawa Massif. The area lies west of Benue Trough and east of Cameroon volcanic line. The aim of this paper is to determine hydraulic properties of water bearing layer using parameters derived from Dar-Zarrouk equation and characterized them into groundwater potential zones. The resistivity values of the weathered and slightly weathered layers which make up the water bearing layers were added and an average was taken and used as the resistivity of the water bearing formation in computation of Dar-Zarrouk parameters in Karlahi area. The values of resistivity of water bearing formation ranged from 18 to 4963 Ωm with an average resistivity value of 549 Ωm and the thickness of the water bearing formation ranges from 21 to 32 m with an average thickness of 24.5 m. Conductivity values range from 0.000201 to 0.05509 (σ) while the longitudinal conductance range from 0.00483 to 1.2363 Ω-1, the transverse resistance ranges from 407 to 123504.3 Ωm2. The hydraulic conductivity and transmissivity values range from 0.14 to 25.87 m/day and 3.28 to 580.4 m2/day respectively. The longitudinal conductance values in Karlahi area revealed poor to good with an average longitudinal conductance value that is moderate. High transverse resistance values are located in the central and southern part of Karlahi area while low values are located in the eastern part. The spatial distribution map of transmissivity in the area revealed moderate to high transmissivity values in the north central part and a negligible to low transmissivity in southern part, extreme northeastern part. The groundwater potential map of Karlahi area shows negligible to weak potential groundwater zones in SW and SE, moderate potential in the central to northern part of Karlahi area.

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GEOELECTRIC STUDY OF GROUNDWATER REPOSITORY IN PARTS OF AKWA IBOM STATE, SOUTHERN NIGERIA

Water Conservation and Management ◽

10.26480/wcm.02.2020.102.104 ◽

2020 ◽

Vol 4 (2) ◽

pp. 102-104

Author(s):

Johnson C. Ibuot ◽

Moses M. M. Ekpa ◽

Doris O. Okoroh ◽

Aniefiok S. Akpan Emmanuel T. Omeje

Keyword(s):

Hydraulic Conductivity ◽

Groundwater Potential ◽

Vertical Electrical Sounding ◽

Protective Capacity ◽

Longitudinal Conductance ◽

Contour Maps ◽

Transverse Resistance ◽

Southern Nigeria ◽

Electrical Sounding ◽

Dar Zarrouk Parameters

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Investigation of Groundwater Potential using Electrical Resistivity Method and Hydraulic Parameters in Lam Apeng, Aceh Besar, Indonesia.

Journal of Geoscience Engineering Environment and Technology ◽

10.25299/jgeet.2020.5.4.5501 ◽

2020 ◽

Vol 5 (4) ◽

pp. 211-218

Author(s):

Dian Darisma ◽

Ferdy Fernanda ◽

Muhammad Syukri

Keyword(s):

Electrical Resistivity ◽

Unconfined Aquifer ◽

Groundwater Potential ◽

Hydraulic Parameters ◽

Sand Layer ◽

Protective Capacity ◽

Longitudinal Conductance ◽

Resistivity Method ◽

Transverse Resistance ◽

Electrical Resistivity Method

Lam Apeng is a village with a majority of people living as farmers, which causes the need of water for agriculture is increasing. The water demand in this area continues to increase as the population increases, for various purposes. The objective of this study is to determine the distribution of the groundwater layer using the electrical resistivity method and to determine groundwater potential using hydraulic parameters. This research is conducted using 2 measurement line with a length of each line is 112 meters and distances of each electrode is 2 meters. The data invert using Res2Dinv software to obtain 2D subsurface lithology subsurface. At line 1, the aquifer (sand) layer is located in the second layer with a rock resistivity value of 12 Ωm - 18.6 Ωm at a depth of 8 m - 18 m. At line 2, the aquifer (sand) layer is also located in the second layer with a resistivity value of 4.6 Ωm - 18 Ωm at a depth of 5 m – 12 m. Based on the interpretation of the two measurement lines, it can be concluded that the type of aquifer in the research site is a semi unconfined aquifer. In this study, hydraulic parameters (hydraulic conductivity, longitudinal conductance, transverse resistance, and transmissivity) was calculated based on the resistivity value and the thickness of the aquifer layer. The average resistivity of the aquifer layer used is 15.3 Ωm and 11.3 Ωm, respectively for line 1 and line 2, indicating that the aquifer was moderately corrosive. Longitudinal conductance values are 0.65 Ω-1 and 0.62 Ω-1 which indicated moderate protective capacity. The transmissivity values are 6.78 m2/dayand 4.77 m2/day, which indicates that the designation in this area is low and the groundwater potential is local or only for personal consumption.

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Evaluation of groundwater potentials of Orogun, South–South part of Nigeria using electrical resistivity method

Applied Water Science ◽

10.1007/s13201-019-1072-z ◽

2019 ◽

Vol 9 (8) ◽

Cited By ~ 1

Author(s):

Sixtus Nwachukwu ◽

Rasaq Bello ◽

Ayomide O. Balogun

Keyword(s):

Electrical Resistivity ◽

Groundwater Potential ◽

Electrical Anisotropy ◽

Electrode Spacing ◽

Electrical Resistivity Survey ◽

Resistivity Method ◽

Transverse Resistance ◽

Hydrocarbon Sources ◽

Electrical Resistivity Method ◽

Dar Zarrouk Parameters

Abstract An investigation has been made of the groundwater potentials of Orogun Town, Ughelli North Local Government Area of Delta State, Nigeria, using electrical resistivity survey. This study motivated to determine electrical resistivity parameters of the area. The aim of this work is to use electrical resistivity method to explore the groundwater potentials of Orogun Town with the determination of its Dar Zarrouk parameters. A total of eight vertical electrical sounding (VES) were conducted with maximum electrode spacing of 150 m. The data were acquired using ABEM SAS 4000 Terrameter and processed using IPI2win and Interpex softwares. The groundwater potentials of the area are evaluated based on the longitudinal conductance (S), transverse resistance (T), coefficient of electrical anisotropy (λ), resistivity for the formation ($$\rho_{\text{m}}$$ρm), reflection coefficient (RC) and resistivity contrast (FC). The results reveal four subsurface geoelectric layers in seven of the eight VES while one VES revealed three subsurface geoelectric layers. Resistivity values for all the layers in the study area are very high, higher than what is expected in a sedimentary basin as we have in the study area. The resistivity values range from 8470 Ωm (layer 1, VES 7) to 118,030,000 Ωm (layer 3, VES 8). Depth to aquifer in the study area ranged from 1.61 m (VES 2) to 12.41 m (VES 1), while resistivity values of the aquifer ranged from 64,182 Ωm (VES 3) to 118,030,000 Ωm (VES 8). The results from the formation parameters evaluated showed that the area has good groundwater potential but might have been highly contaminated, especially from hydrocarbon sources and other man-made pollutants. The suggested contamination of the aquifer is as a result of the high values of resistivity of the aquifer layers.

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Geoelectrical investigation of groundwater potential and vulnerability of Oraifite, Anambra State, Nigeria

Applied Water Science ◽

10.1007/s13201-020-01304-1 ◽

2020 ◽

Vol 10 (10) ◽

Author(s):

Joy O. Eugene-Okorie ◽

Daniel N. Obiora ◽

Johnson C. Ibuot ◽

Desmond O. Ugbor

Keyword(s):

Groundwater Potential ◽

Aquifer Vulnerability ◽

Southeastern Nigeria ◽

Anambra State ◽

Contour Maps ◽

Average Value ◽

Electrical Resistivity Survey ◽

Transverse Resistance ◽

Electrical Sounding ◽

Dar Zarrouk Parameters

Abstract Electrical resistivity survey employing vertical electrical sounding was carried out in Oraifite, Southeastern Nigeria, involving a total of twenty soundings across, in order to assess the groundwater potential and the aquifer vulnerability in Oraifite. The field data were interpreted using the WINRESIST software, and the resulting geoelectric curves give the resistivities, depths and thicknesses of each geoelectrical layer. Dar Zarrouk parameters and aquifer transmissivity were computed using the values of aquifer resistivity and thickness. From the results, variations of the computed parameters were observed. Aquifer resistivity ranges from 420.1 to 27,585.8 Ωm having an average value of 4906.3 Ωm, while its thickness varies from 13.4 to 93. 9 m. Longitudinal conductance varies from 0.0015 to 0.2136 Ω−1, transverse resistance ranges from 29,388.88 to 1,158,604.0 Ωm2, while the transmissivity varies from 1.1692 to 123.7905m2/day. The contour maps reveal the distributions of these parameters, which help in delineating zones with different layer characteristics. The result from this study can be a reference for decision making in the abstraction and management of groundwater repositories.

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Evaluation of groundwater potential and saline water intrusion using secondary geophysical parameters: A case study from western Maharashtra, India

E3S Web of Conferences ◽

10.1051/e3sconf/20185400033 ◽

2018 ◽

Vol 54 ◽

pp. 00033 ◽

Cited By ~ 1

Author(s):

N. Suneetha ◽

Gautam Gupta

Keyword(s):

Fresh Water ◽

Saline Water ◽

Salt Water ◽

Rapid Development ◽

Geophysical Methods ◽

Groundwater Potential ◽

Saline Water Intrusion ◽

Water Intrusion ◽

Transverse Resistance ◽

Dar Zarrouk Parameters

Aquifers along the coastal regions around the world are facing severe level of saline water intrusion problems. Rapid development and the associated increase in groundwater withdrawals intensify the problem. Extensive mapping of migration and extent of salt water plumes is difficult and costly. Several surficial geophysical methods have been developed for measuring salinity levels in coastal aquifers. The present study is an attempt to delineate the saline water and fresh water intrusion in parts of west coast of Maharashtra, India. A total of 86 vertical electrical soundings were carried out using the Schlumberger configuration. The contour maps for Dar-Zarrouk parameters viz. the transverse resistance (T), longitudinal conductance (S), and coefficient of anisotropy (λ) were computed at 84 sites to generate the resistivity regime of saline and fresh water bearing formations. The results exemplify that the Dar-Zarrouk parameters provide a practical elucidation in demarcating the saline and fresh water aquifers, particularly when the resistivity data interpretation encounters constraints due to intermixing of saline water aquifers, fresh water aquifers etc. Several NE-SW and NW-SE oriented major lineaments and its cris-crosses have been observed in this region.

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Identifying Changes in Sediment Texture along an Ephemeral Gravel-Bed Stream Using Electrical Resistivity Tomography 2D and 3D

Applied Sciences ◽

10.3390/app11073030 ◽

2021 ◽

Vol 11 (7) ◽

pp. 3030

Author(s):

Marcos A. Martínez-Segura ◽

Carmelo Conesa-García ◽

Pedro Pérez-Cutillas ◽

Pedro Martínez-Pagán ◽

Marco D. Vásconez-Maza

Keyword(s):

Electrical Resistivity ◽

Cross Sections ◽

Electrical Resistivity Tomography ◽

Environmental Changes ◽

Subsurface Layer ◽

Sediment Texture ◽

Borehole Data ◽

Resistivity Tomography ◽

Gravel Bed ◽

Basin Scale

Differences in deposit geometry and texture with depth along ephemeral gravel-bed streams strongly reflect fluctuations in bedload which are due to environmental changes at the basin scale and to morphological channel adjustments. This study combines electrical resistivity tomography (ERT) with datasets from borehole logs to analyse the internal geometry of channel cross-sections in a gravel-bed ephemeral stream (southeast Spain). The survey was performed through longitudinal and transverse profiles in the upper channel stretch, of 14 to 30 m in length and 3 to 6 m in depth, approximately. ERT values were correlated with data on sediment texture as grain size distribution, effective grain sizes, sorting, and particle shape (Zingg’s classification). The alluvial channel-fills showed the superposition of four layers with uneven thickness and arrangement: (1) the softer rocky substrate (<1000 Ω.m); (2) a thicker intermediate layer (1000 to 2000 Ω.m); and (3) an upper set composed of coarse gravel and supported matrix, ranging above 2000 Ω.m, and a narrow subsurface layer, which is the most resistive (>5000 Ω.m), corresponding to the most recent armoured deposits (gravel and pebbles). The ERT results coupled with borehole data allowed for determining the horizontal and vertical behaviour of the materials in a 3D model, facilitating the layer identification.

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Analysis of Errors in the Estimation of Impact Positions in Plate-Like Structure through the Triangulation Formula by Piezoelectric Sensors Monitoring

Sensors ◽

10.3390/s18103426 ◽

2018 ◽

Vol 18 (10) ◽

pp. 3426 ◽

Cited By ~ 4

Author(s):

Eugenio Marino-Merlo ◽

Andrea Bulletti ◽

Pietro Giannelli ◽

Marco Calzolai ◽

Lorenzo Capineri

Keyword(s):

Propagation Velocity ◽

Lamb Waves ◽

Correlation Method ◽

Time Of Arrival ◽

Impact Point ◽

Laboratory Procedure ◽

Impact Position ◽

Set Up ◽

Two Parameters ◽

The Impact

The structural health monitoring (SHM) of critical structures is a complex task that involves the use of different sensors that are also aimed at the identification of the location of the impact point using ultrasonic sensors. For the evaluation of the impact position, reference is often made to the well-known triangulation method. This method requires the estimation of the differential time of arrival (DToA) and the group velocity of the Lamb waves propagating into a plate-like structure: the uncertainty of these two parameters is taken into consideration as main cause of localization error. The work proposes a simple laboratory procedure based on a set-up with a pair of sensors that are symmetrically placed with respect to the impact point, to estimate the uncertainty of the DToA and the propagation velocity estimates. According to a theoretical analysis of the error for the impact position, the experimental uncertainties of DToA and the propagation velocity are used to estimate the overall limit of the SHM system for the impact positioning. Because the error for the DToA estimate depends also on the adopted signal processing, three common methods are selected and compared: the threshold, the correlation method, and a likelihood algorithm. Finally, the analysis of the positioning error using multisensory configuration is reported as useful for the design of the SHM system.

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GIS-Based Groundwater Potential Assessment in Varied Topographic Areas of Mianyang City, Southwestern China, Using AHP

Remote Sensing ◽

10.3390/rs13224684 ◽

2021 ◽

Vol 13 (22) ◽

pp. 4684

Author(s):

Qing Zhang ◽

Shuangxi Zhang ◽

Yu Zhang ◽

Mengkui Li ◽

Yu Wei ◽

...

Keyword(s):

Water Supply ◽

Groundwater Potential ◽

Southwestern China ◽

Borehole Data ◽

Hydrological Data ◽

Potential Map ◽

Groundwater Potential Map ◽

Emergency Water Supply ◽

Post Disaster ◽

Geological Background

Mianyang City is located in the varied topographic areas of Sichuan Province in southwestern China and is characterized by a complex geological background. This area is prone to disasters and its varied topography is inconvenient for emergency water storage and supply. Groundwater is essential for alleviating the demand for water and post-disaster emergency water supply in this area. This study applied AHP to integrate remote sensing, geological and hydrological data into GIS for the assessment of groundwater potential, providing a plan for the rational exploitation of groundwater and post-disaster emergency water supply in the area. Nine factors, including the spring calibration related to groundwater, were integrated by AHP after multicollinear checks. As a result, the geology-controlled groundwater potential map was classified into five levels with equal intervals. All the results were validated using borehole data, indicating the following: the areas with yield rates of , 1–20 , and 20–400 accounted for 2.66%, 36.1%, and 39.62%, respectively, whereas the areas with yield rates of 400–4000 and accounted for only 20.88% and 0.75% of the overall area. The flexibility of this quick and efficient method enables its application in other regions with a similar geological background.

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