What is Geoelectrical method?
Geoelectric method is divided into two parts: Mapping resistivity method as a resistivity method that aims to study horizontal variations of horizontal layer resistivity types and Resistivity sounding method or, the drilling resistivity method that studies the variety of rock resistivity beneath the surface of the …
Which method is used for groundwater exploration?
Various surface geophysical techniques are used in groundwater exploration which includes the electrical resistivity method, seismic refractive method, magnetic method, radioactivity method, gravity method, and electromagnetic method.
What is the resistivity of groundwater?
The existence of groundwater based on resistivity value from the interpretation is about 10 to 100 ohm-m. Meanwhile, the result also shows that the subsurface in this study area is made up of alluvium and clay.
What is groundwater exploration?
Groundwater exploration is a typical task of a hydrogeologist or an engineer. Identifying the. location of its availability is a challenging task. Exploration of groundwater requires a basic. understanding of its position in the subsurface geological setup.
Which method is most suitable to locate groundwater?
Exploration of groundwater requires a basic understanding of its position in the subsurface geological setup. Groundwater Exploration is attempted through either by direct or indirect methods. Test drilling is the direct approach to find out the resource. This is an expensive affair.
How is resistivity used in industry?
The resistivity of materials is important as it enables the right materials to be used in the right places in electrical and electronic components. Materials used as conductors, for example in electrical and general connecting wire need to be able to have a low level of resistivity.
How does resistivity logging help in groundwater exploration?
Resistivity logging is a method of well logging that works by characterizing the rock or sediment in a borehole by measuring its electrical resistivity. Resistivity is a fundamental material property which represents how strongly a material opposes the flow of electric current.
How do hydrologists locate groundwater?
As a first step in locating ground water, the hydrologist prepares a geologic map showing where the different kinds of rock come to the land surface. Some of the rocks may be so cracked and broken that they provide good openings to carry water underground.
How remote sensing is used in groundwater exploration?
Remote sensing can contribute an image base map or geologic and hydrologic parameters, derived from the image, to the multiple data sets in a hydrologic information system. Various merging and integration techniques may then be used to obtain information from these data sets.
What is test drilling in ground water exploration?
understanding of its position in the subsurface geological setup. Groundwater Exploration is. attempted through either by direct or indirect methods. Test drilling is the direct approach to. find out the resource.
What is the geoelectrical survey?
The Geolectrical survey involving electrical resistivity methods has been carried out at Birnin Kebbi and Fakai Local Government Area in Northern Nigeria with the view to delineate the Geoelectrical characteristics of basement complex and sedimentary formation to evaluate it ground water potential in the areas.
How is geophysics used in groundwater resources and water quality evaluations?
The use of geophysics for both groundwater resource mapping and for water quality evaluations has increased over the last 15 years in large part due to the rapid advances in microprocessors and associated numerical modeling solutions.
What is the best electrical resistivity method for groundwater sounding?
The direct-current (DC) electrical resistivity method for conducting a vertical electrical sounding (VES) has proved very popular with groundwater studies due to the simplicity of the technique and the ruggedness of the instrumentation.
Can ground electrical methods be used for siting water supply boreholes?
The Use of Ground Electrical Methods for Siting Water Supply Boreholes in Shallow Crystalline Basement Terrains. In: E. P. Wight and W. G. Burgess, (eds), The Hydrogeology of Crystalline, 1992.