Nov 10, 2015 electrical resistivity method for groundwater investigation electrical resistivity methods of geophysical prospecting are well established and the most important method for groundwater investigations. Application of vertical electrical method in groundwater. Behind the scenes of groundwater exploration with electrical. An introduction to electrical resistivity in geophysics. The limitations associated with these methods have prompted hydrogeologists to use more than one method to collect accurate data in groundwater exploration revil et al. The gravity method is also used in groundwater exploration and in the detection of structural trends controlling the regional geometry of the groundwater aquifers 2. The resistivity is inversely proportional to the rock porosity and its water saturation. A number of different electrode configurations can be employed for electrical surveys, including. In contrast, electrical and seismic methods can detect vertical, as well as lateral, contrasts of resistivity. There are many applications for electric resistivity methods including groundwater detection, mineral identification, waste exploration, oil identification, and several others.
The application of electrical methods in exploration for. The concepts involved in electrical resistivity studies are. Aspects of geophysical survey using vertical electrical sounding ves for groundwater exploration in parts of ahoada west lga of rivers state, southern nigeria. The csamtmt method has been used to identify groundwater exploration targets. View resistivity method groundwater exploration research papers on academia. Correct interpretations requires supplementary data from sub surface investigations to.
Gravity and magnetic discussed below methods detect only lateral contrasts in density or magnetization, respectively. Department of geology, university of benin, benin city, nigeria. Groundwater exploration using integrated geophysical. Electrical resistivity survey for groundwater investigations. Electrical resistivity method is based on the difference in the electrical conductivity or the electrical resistivity of different soils. An attempt is made in the present study to investigate the extent of the influence of structures such as fractures and thereby delineate the nature of subsurface lithology with the help. The vertical electrical sounding ves was done using the schlumberger electrode array configuration and the schlumberger automatic analysis method of. The resistivity p of a material is given by where, r is the resistance, a is the area of crosssection and l is its length.
The electrical geophysical methods are used to determine the electrical resistivity of the earths subsurface. Major flows of groundwater are to be observed in the region. Underground water exploration of oleh, nigeria using the electrical. Geophysical investigation for groundwater using electrical resistivity method a case study of annunciation grammar school, ikere lga, ekiti state, southwestern nigeria lateef t. Pdf application of electrical resistivity method erm. As, the water content and its distribution change the electrical. However, the integrated application of the audio frequency telluric method and electrical resistivity tomography has proved to be efficient for groundwater exploration in karst areas with or without thin cover.
Chumaa a applied physics department, national university of science and technology, box ac939, ascot, bulawayo, zimbabwe. Because of this effect, groundwater is a good target for electrical and electromagnetic geophysical methods that measure resistivity. The different electrical properties that influence electrical fields are primarily the resistivity. Role of electrical resistivity method for groundwater exploration in hard rock areas. For example, with waste detection, electric resistivity techniques may provide a more environmentally friendly way of acquiring data. Electrical resistivity methods the resistivity method is used in the study of horizontal and vertical discontinuities in the electrical properties of the ground. Pdf role of electrical resistivity method for groundwater. Early methods of groundwater exploration to best understand how electrical resistivity surveys for groundwater exploration work today, its important to understand where resistivity testing began. A new simple and quick geophysical method for groundwater exploration in the crystalline rocks of tudun wada kano state, nigeria has been developed. Geophysical investigation for groundwater using electrical. The basic principle of the electrical methods of exploration for groundwater is based on the concept of resistivity. Geo electrical imaging is considered one of the most robust, but flexible in design and deployment, geophysical mapping methods for subsurface imaging in the upper 500 feet. Nov 14, 2016 early methods of groundwater exploration to best understand how electrical resistivity surveys for groundwater exploration work today, its important to understand where resistivity testing began.
The principal methods used in groundwater investigations include electrical resistivity er, electromagnetics em, and nuclear magnetic resonance nmr. Surface resistivity methods for groundwater exploration. The most common electrical methods used in hydrogeologic and. It utilizes direct currents or low frequency alternating currents to investigate the electrical properties resistivity of the subsurface. Groundwater investigation using combined geophysical. The resistivity method is used for detecting groundwater presence and differentiating subsurface layers. The surface methods of groundwater exploration include the following. Inexpensive geophysical instruments supporting groundwater. Application of geoelectric method for groundwater exploration from. Geophysics and specifically, geoelectrical resistivity method is, generally, considered to be the most promising and most suitable method for ground water prospecting. Using schlumberger configuration, 54 vertical electrical soundings ves have been carried out.
Electrical resistivity method erm is one of geophysical tool that offer very attractive technique. Role of electrical resistivity method for groundwater. Department of physics, olabisi onabanjo university, agoiwoye, ogun. Department of physics, university of adoekiti, ekiti state. Hamoudaa, salah mansourb anational institute of oceanography and fisheries, alexandria, egypt bgeological survey of egypt and mining authority, egypt. Subsurface surveys extensive education and experience. Electrical resistivity tomography ert imaging takes advantage of the wide ranging electrical resistivity characteristics. The gravity method also enables a prediction of the total anomalous mass ore tonnage responsible for an anomaly. The electrical resistivity method involves the measurement of the apparent resistivity of soils and rock as a function of depth or position. Groundwater, through the various dissolved salts it contains, is ionically conductive and enables electric currents to flow into the ground. Application of electrical resistivity method erm in. Application of electrical resistivity method for groundwater.
Akhtar izzaty riwayat 1, mohd ariff ahmad nazri 1,2 and mohd hazreek zainal abidin 1. Application of electrical resistivity method for groundwater exploration at the moghra area, western desert, egypt author links open overlay panel m. In this method the electrical resistivity of the formations is measured by passing a current. A case study from fidiwoajebo areas of southwestern nigeria. Review of electrical and gravity methods of nearsurface. Jun 18, 2016 the principal methods used in groundwater investigations include electrical resistivity er, electromagnetics em, and nuclear magnetic resonance nmr. Electrical resistivity method for groundwater investigation electrical resistivity methods of geophysical prospecting are well established and the most important method for groundwater investigations. One commonly used method is the electrical resistivity method since, it is efficient and economical to determine groundwater. Published under licence by iop publishing ltd journal of physics. Among all the geophysical methods, electrical and electromagnetic techniques are the most popular in groundwater exploration due to the close relationship between electrical conductivity and some hydrogeological properties of the aquifer e. Geoelectrical imaging is considered one of the most robust, but flexible in design and deployment, geophysical mapping methods for subsurface imaging in the upper 500 feet. Application of electrical resistivity method for groundwater exploration at the moghra area, western desert, egypt m.
Resistivity is defined as resistance in ohms between the opposite phases of a unit cube of a material. Electrical resistivity method erm is one of geophysical tool that offer very attractive technique for subsurface profile characterization in larger area. Geophysical survey involving electrical resistivity methods has been carried out at annunciation. Application of electrical resistivity method for groundwater exploration at the moghra area. Application of vertical electrical method in groundwater exploration at remo north local government in ogun state of nigeria odunaike r. In malaysia, application of erm had already implemented as an alternative t ool to. Pdf application of electrical resistivity method erm in. Pdf application of resistivity method for groundwater exploration. G journal of geology l geophysics abdullahi, et al, geol. Right interpretation requires additional data from the sub surface investigations to confirm surface findings. A geophysical evaluation using electrical resistivity method for groundwater exploration at the study area was carried out which involved the utilization of vertical electrical sounding ves technique.
Electrical resistivity method the purpose of electrical surveys is to determine the subsurface resistivity distribution by making measurements on the ground surface. Electrical resistivity survey were carried out at jubilee homes parkland, to delineate subsurface layers and determine the ground water potential, so as to make adequate provision of portable water supply for the settlements springing up within this area. Groundwater investigation using combined geophysical methods. Applicable alternative technique in groundwater exploration such as erm which complement with existing conventional method may produce comprehensive and convincing output thus effective in. Several methods employed in groundwater exploration include electrical resistivity, gravity, seismic, magnetic, remote sensing, electromagnetic, among others, out of which the resistivity method is the most effective for locating productive well and the vertical electrical sounding ves. Electrical resistivity, ip and sp ground geophysics. It is taught from a physics perspective, yet the application of the theory to the real world is the overriding goal. In this area, electrical resistivity method has been worked to analyse geoelectrical parameter identification. Fracture pattern and electrical resistivity studies for.
Application of electrical resistivity for groundwater exploration in. Application of the electrical resistivity method in groundwater. Vertical electric soundings ves for grounding studies astm g57, ieee81. Application of the electrical resistivity method in. Electrical resistivity tomography ert imaging takes advantage of. Resistivity method groundwater exploration research papers. Electrical resistivity method of geophysical exploration happens to be the most preferred method in groundwater exploration. A geophysical exploration involving the use of vertical electrical sounding was carried out in a sedimentary environment to determine the suitability of the method for underground water studies. Brothers conrad and marcel schlumberger performed the very first investigation of how electrical current moves through the ground and what you can detect using an electrical resistivity survey in. Mod01 lec27 surface investigation of ground water contd.
Underground water exploration using electrical resistivity. In the resistivity image, including in the zones marked as granular aquitards a, this can be assumed. Application of electrical resistivity method for groundwater exploration at the moghra area, western desert, egypt. Two properties are of primary concern in if the ground in a given area is horizontal the application of electrical methods. Application of the electrical resistivity method in groundwater exploration case study. The resistivity of soils is a complicated function of porosity, permeability, ionic content of the pore fluids, and clay mineralization. Several attempts have been made by groups of individuals, communities, government and even industries to site a good water project in anambra state nfor et al. Electrical resistivity method erm is part of geophysical methods which used as preliminary step involve in any groundwater exploration. Application of electrical resistivity method erm in groundwater. Application of electrical resistivity for groundwater. The integrated approach to solving complicated geological, hydrological and environmental problems is now widely used in geophysics. Dec 02, 2016 seismic resistivity method by parag kamlakar pal. Pdf surface resistivity methods for groundwater exploration. This is based on the concept of determination of the subsurface, which can yield useful information on the structure, composition and content of buried formation.
Aspects of geophysical survey using vertical electrical. Application of electrical resistivity method erm in groundwater exploration. The electrical resistivity technique is a preferable geophysical technique for groundwater exploration. Right interpretation requires additional data from the sub surface investigations to. As, the water content and its distribution change the electrical properties of the rocks. Usually the ground water exploration projects pass through the phase of regional surveys, leading to detailed surveys and ultimately resulting in the exploitation of ground water by means of bore holes, wells. Groundwater prospecting using electrical resistivity new. The details of all publications are in the researchgate in full text pdf forms. The occurrence, movement and control of groundwater, particularly in hardrock areas, are governed by different factors such as topography, lithology, structures like fractures, faults and nature of weathering. Electrical, lithological, thickness, basement, valley fills, groundwater flow introduction electrical resistivity method is the most suitable for foundation studies of groundwater exploration. Electrical resistivity survey for groundwater investigations and shallow subsurface evaluation of the basalticgreenstone formation of the urban bulawayo aquifer innocent muchingamia,b. In the resistivity method a slowly alternating electrical current flows through the ground, such that, through analogy to ohms law resistance voltagecurrent, measurement of voltage and current at the ground surface gives an estimate of the electrical resistance in the subsurface. Thus, electrical methods are employed for those applications in which a knowledge of resistivity or the resistivity distribution will solve or shed light on the problem at hand.
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