VES Research Papers - Academia.edu (original) (raw)

Abstract The combination of geophysical and geotechnical methods in foundation investigation has shown to be invaluable in deciphering the depth to bedrock, characterizing the earth materials and extent of variation of allowable bearing... more

Rivers State as the nomenclature depicts is a state richly blessed with both surface and subsurface water. As a result of this, there is less problem of water scarcity, especially in the elite cities of the state, but so many other... more

Rivers State as the nomenclature depicts is a state richly blessed with both surface and subsurface water. As a result of this, there is less problem of water scarcity, especially in the elite cities of the state, but so many other communities due to one reason or the other still wallow in abject water scarcity. In this survey, a total of seven (7) vertical electric soundings were carried out using Schlumberger configuration at Obibi community in Omuma local government area, Rivers State, to ascertain the location and depths to aquifer. ABEM terrameter SAS 300 was used in the survey with electrode spacing AB/2 of 150 m, thus probing to a depth of about 200 m. Geoelectric software (IPI2WIN) was utilized in the plotting, iteration and interpretation of the resistivity data obtained. From the quantitative interpretation and the lithology of the areas, five different subsurface layers were delineated with their geoelectric curve given as AK, AKQ and AKH. Aquifer in these areas is highly prolific and mostly located at an average depth of 52 m.

Virtual environments (VEs) should be able to provide experiences as rich and complex as those to be had in real life. While this seems obvious, it is not yet possible to create a perfect simulacrum of the real world, so such... more

Virtual environments (VEs) should be able to provide experiences as rich and complex as those to be had in real life. While this seems obvious, it is not yet possible to create a perfect simulacrum of the real world, so such correspondence requires the development of design techniques by which VEs can be made to appear more real. It also requires evaluation studies to determine if such techniques produce the desired results. As emotions are implicated in our phenomenological understanding of the physical world, they should also play an integral role in the experience of the virtual one. Therefore, a logical sequence of experimentation to understand how VEs can be made to function as emotion-induction systems is in order. The Sensory Environments Evaluation (SEE) research program has developed a twofold design process to explore if we react to virtually supplied stimuli as we do to the real world equivalents. We look at manipulating both the sensory and emotional aspects of not only ...

A research on the impact of waste disposal site on groundwater resources was conducted around Aarada refuse dumpsite, Ogbomosho, Oyo State, Nigeria using electrical resistivity (Vertical Electrical Sounding) and hydrophysicochemical... more

A research on the impact of waste disposal site on groundwater resources was conducted around Aarada refuse dumpsite, Ogbomosho, Oyo State, Nigeria using electrical resistivity (Vertical Electrical Sounding) and hydrophysicochemical methods. World Health Organization (WHO) standard was used as yard stick for the hydrophysicochemical method. A total of seven VES were carried out with electrode spacing ranging between 80 to 130m. The hydro-physicochemical analysis was conducted at the peak of the dry season on nine water samples taken from nine different hand-dug wells in the research area. The result obtained from the interpreted VES data revealed leachate plumes at the subsurface in the study area. The outcome of the hydro-physicochemical method revealed hazardously high values of Fe2+, Pb2+, Zn2+, Cu2+ and NO3 -.

Virtual environments (VEs) should be able to provide experiences as rich and complex as those to be had in real life. While this seems obvious, it is not yet possible to create a perfect simulacrum of the real world, so such... more

Virtual environments (VEs) should be able to provide experiences as rich and complex as those to be had in real life. While this seems obvious, it is not yet possible to create a perfect simulacrum of the real world, so such correspondence requires the development of design techniques by which VEs can be made to appear more real. It also requires evaluation studies to determine if such techniques produce the desired results. As emotions are implicated in our phenomenological understanding of the physical world, they should also play an integral role in the experience of the virtual one. Therefore, a logical sequence of experimentation to understand how VEs can be made to function as emotion-induction systems is in order. The Sensory Environments Evaluation (SEE) research program has developed a twofold design process to explore if we react to virtually supplied stimuli as we do to the real world equivalents. We look at manipulating both the sensory and emotional aspects of not only ...

Very Low Frequency Electromagnetic (VLF-EM) and Vertical Electrical Sounding (VES) method were used to delineate fracture zones for groundwater exploration within the permanent site of Olabisi Onabanjo University, Ago-Iwoye, Southwestern... more

Very Low Frequency Electromagnetic (VLF-EM) and Vertical Electrical Sounding (VES) method were used to delineate fracture zones for groundwater exploration within the permanent site of Olabisi Onabanjo University, Ago-Iwoye, Southwestern Nigeria which is underlain mainly by suites of gneissic rocks. The VLF-EM survey was made at 10 meters interval along eight (8) traverses at East - West direction ranging from 230 - 500 meters in length. The plot of filtered real and filtered imaginary identified eight (8) prominent fracture zones close to the surface or sub surface which was further delineated by VES method. Seventeen (17) VES soundings were carried out at locations of prominent VLF anomalies presumably typical of basement fracture using AB/2 of 100m. The results shows 3 distinctive geo-electric interpreted layers of sandy top soil, (0.6m to 8.6m, 107.8 m to 662.72 m), underlain by sandy clay/clayey sand (5.7m to 43.5m, 34.7Ωm to 346.8Ωm) which is underlain by fractured/fresh basement (484Ωm to 5651Ωm). The basement fractures identified from VLF-EM anomaly curves were confirmed by geo-electric interpretation of the VES, therefore, the use of the two methods help in identification and delineation of prominent prospective groundwater areas.

In a bid to provide sustainable water supply for the proposed irrigation scheme at Tudun-dawa, Vertical Electrical Soundings (VES) were carried out with the aim of suggesting suitable sites for construction of boreholes. The Sting... more

In a bid to provide sustainable water supply for the proposed irrigation scheme at Tudun-dawa, Vertical Electrical Soundings (VES) were carried out with the aim of suggesting suitable sites for construction of boreholes. The Sting Resistivity/IP meter was used to acquire the data while the 1D Earth Imager iterative software was used to process the acquired data. With borehole information as control, the interpretation revealed the subsurface geology of the study area in succession of four subsurface resistivity layers. With the equivalent geologic layers that suggest the weathered and the underlain fractured basement as the aquiferous layers, sites that will provide appreciable volume of water were suggested base on vertical and lateral extent of the aquiferous layers.

The interpretation of 15 Schlumberger Vertical Sounding (VES) data along 3 profiles were carried out in Government Day Secondary School Narayi, Kaduna State. This is an attempt to investigate the Depth to Basement and the Basement... more

The interpretation of 15 Schlumberger Vertical Sounding (VES) data along 3 profiles were carried out in Government Day Secondary School Narayi, Kaduna State. This is an attempt to investigate the Depth to Basement and the Basement topography of the area. The Ohmega Terrameter was the principal instrument used. No booster was used. The Schlumberger electrode configuration was used in the data acquisition. The method consists of expanding AB (distance between the current electrodes) while MN (distance between the potential electrodes) is kept fixed. The VES curves were interpreted using IPI2Win resistivity computer software. The survey area is dominated by mainly four layers (topsoil, weathered basement, fractured basement and fresh basement). The results of the interpreted VES data showed an uneven distribution of the basement layer, with resistivity values ranging from 4.75Ωm-220000Ωm. The basement layer is predominantly fresh granitic rocks. The depth to basement ranges from 10.8m-21.96m with an average depth of 15.42m. Clay constituents are needed to be excavated at an average depth of 6m from the topsoil before laying any foundation.