Thompson OGUNRIBIDO - Academia.edu (original) (raw)

Papers by Thompson OGUNRIBIDO

Earth sciences Pakistan, Nov 29, 2023

Environmental Research, Engineering and Management, Jun 18, 2012

Saw dust ash (SDA) was investigated as a stabilizing agent for an A-7-6 lateritic soil based on t... more Saw dust ash (SDA) was investigated as a stabilizing agent for an A-7-6 lateritic soil based on the following engineering properties that directly or indirectly measures the shear strength of a soil.These are,Atterberg limits, Maximum Dry Density (MDD), and 7-day water cured unconfined compressive strength test. With increasing ash content the liquid limit shows a progressive increase up to 8% and then decrease; plastic limit increases up to a value,drops and then levels off; maximum dry density decreases, while optimum moisture content increases. Unconfined compressive strength shows an initial decrease then an increase that reaches a maximum before a drop.

Journal of Geography & Natural Disasters, 2020

Thirty one groundwater samples were collected in the study area and were taken to Adekunle Ajasin... more Thirty one groundwater samples were collected in the study area and were taken to Adekunle Ajasin Research laboratory where each samples were analysed for 27 parameters. Anions were determined by titration, heavy metals by AAS and so, dium and potassium by flame photometer. Geostatistical techniques such as descriptive, correlation coefficient, cluster and factor analyses were used for the interpretation of large and complex hydrogeochemical data obtained from 31 groundwater samples from coastal aquifers in Igbokada area in Dahomey Basin, Nigeria. The purpose was to determine the spatial variability of groundwater and to identify their various sources of pollution. Pollutants in the groundwater are Oil and grease; iron and Mg2+ and Cl- due to saltwater intrusion from Atlantic Ocean. Cluster analysis classified water into three groups, fresh, intermediate and polluted water according their geochemical and location characteristics. There were 4 Factor analysis, factor 1 indicated high loading of magnesium and chloride ions that were responsible for the groundwater pollution and they are likely to be derived from saltwater intrusion, Factor 2, showed high loading of calcium and calcium hardness that were responsible for its temporary hardness. Factor 3, exhibits high loading of Na+ and K+ which may be due to saltwater intrusion, Factor 4, showed high loading of Mn+ and Zn+ which may be derived from ores, and low loading of SO42 . Groundwater here are good for drinking except those in locations 3, 4, 5, 20, 21, 21, 23, and 28 which were polluted and should be discarded for health reasons.

Hydrogeochemical investigation was carried out in Owo Area, to assess the quality of surface wate... more Hydrogeochemical investigation was carried out in Owo Area, to assess the quality of surface water and groundwater for its suitability for domestic and other uses. Twenty water samples were collected in clean 2 litres plastic bottles and were transported to the research laboratory of Adekunle Ajasin University, Akungba – Akoko and Federal University of Technology, Akure for analyses. Physical parameters such as TDS, EC and pH were measured in the field by water quality analyser. Metals such as Na + and K + were analysed by flame photometer and Ca 2+ , Cr 6+ , Pb 2+ , Cu 2+ and Cd 2+ were determined by AAS at Federal University of Technology, Akure and anions by titration. pH ranged from 7.22 - 7.83 and 6.71 - 8.47 for surface and groundwater respectively, EC for surface water ranged from 21.5 - 66.4 µS/cm and groundwater from 7.0 - 107.5 µS/cm. TDS for surface and groundwater were 151 - 220 mg/L and 44 - 244 mg/L respectively. Calcium was the dominant cation and bicarbonate was the dominant anion and source may be from septic tanks. Cluster analysis grouped water samples into three; fresh, intermediate and polluted water. Gibb diagram indicated the source of dissolved constituents was due to soil / rock - water interaction. Hydrogeochemical facies showed that the water type is Ca – HCO 3 . Samples from location 1, 2, 3, 4, 7, 8, 10 and 12 were polluted and should be treated before use or should be discarded.

Journal of environment and earth science, 2012

Electrical resistivity sounding of Araromi area of subsurface units and evaluating the groundwate... more Electrical resistivity sounding of Araromi area of subsurface units and evaluating the groundwater potential of the area. Forty (40) Schlumberger vertical electrical resistivity soundings were acquired with ABEM SAS 1000 Resistivity Meter. The elec varied from 1-65 m with maximum spread length involved partial curve matching and computer iteration technique using WinResist software. Three to four distinct subsurface geologic layers were identified from the geoelectric layers, aided by borehole lithological logs. These included a lateritic clay/sandy clay/clayey sand/sandy topsoil, clayey weathered layer, partially weathered/fractured basement and the fresh baseme ohm-m and 0.7-1.5 m; 196-472 ohm respectively.. The depth to bedrock varied from 0 to 20.1 m. The bedrock relief was generally uneven, with bedrock elevations that varied between 312 and 346 m above sea level. The bedrock relief map delineated two major parallel basement depressions striking approximately NW The isopach map of the overburden show constituted the dominant aquifer units with tendency for low groundwater potential and thin nature of the overburden. Future groundwater resource developmen feasible in few places characterized by relatively thick

SSRG international journal of geoinformatics and geological science, Apr 25, 2022

Kozaklı is one of the most important areas of Central Anatolia in terms of geothermal potential a... more Kozaklı is one of the most important areas of Central Anatolia in terms of geothermal potential and it is characterized by thrust and normal faults. These faults, accommodating deep circulation of hydrothermal fluids of meteoric origin, are the primary controls of the geothermal systems in this region. Chemical and isotopic composition of the hot springs and geothermal fluids was monitored throughout 2017. The surface temperature of the fluid ranges from 24.9 to 96°C. The cold spring waters are mostly of the Ca-Mg−HCO 3 type in the study area. Major element chemistry of the water reveals that the deep geothermal fluids are mostly of the Na-Ca-Cl-SO 4 type while the shallow geothermal well waters are Ca-Na−HCO 3 waters. Silica geothermometers suggest that the reservoir temperature ranges from 103 to 173°C. Based on the δ 18 O-δD relationship, water samples have a high-altitude meteoric origin. Stable isotopic data indicate that the geothermal fluids are formed by local recharge and deep circulation of meteoric waters. The Rare Earth Elements and Yttrium (REY) composition showed that Eu, Ce and Y anomalies are related both to inheritance from geological host materials and the fractionation of these elements during water-rock interactions.

International journal of physical research, Aug 24, 2020

Twenty soil samples collected from the failed portions in the study area were air dried for two w... more Twenty soil samples collected from the failed portions in the study area were air dried for two weeks before analyses. Each soil samples were subjected to eight engineering tests which include: natural moisture content, atterberg limit, specific gravity, compaction, unconfined compressive strength, California bearing ratio, grain size and hydrometer analysis. Results showed that the natural moisture content ranged from 17.7% to 37.8%, liquid limit from 48.5% to 62.4%, plastic limit from 18.3% to 26.8%, plasticity index from 25.7% to 37.7%, shrinkage limit from 5.8%-12.5%, optimum moisture content from 14.2% to 32.4%, maximum dry density from 1301 Kg/rn3 to 2002 Kg/rn3. Soaked California bearing ratio ranged from 5% to 17%, unsoaked from 15% to 38%, specific gravity from 2.5 to 2.68, unconfined compressive strength r from 112.8 Kpa to 259.7 Kpa, shear strength from 56.4 Kpa to 129.9 Kpa and hydrometer analysis from 48.5% to 72.1%. Based on the Federal Government specifications for pavement construction, for the soil to be suitable, stabilization with bitumen, Portland cement, lime, coal fly ash, and saw dust should be done. Road pavement failure along Arigidi-Oke Agbe road was due to poor engineering geological condition of the sub-grade soils and poor drainage systems.

Geosciences, 2013

The geoelectric assessment of the groundwater prospects in Supare Estate, Supare Akoko, Southwest... more The geoelectric assessment of the groundwater prospects in Supare Estate, Supare Akoko, Southwestern Nigeria, has been carried out in this study. The study area is underlain by Precambrian Basement Co mp lex rocks of Southwestern Nigeria. These rocks are inherently characterized by lo w porosity and permeability. The interpretation of fourteen (14) vertical electrical sounding (VES) using the Schlumberger electrode array shows four geoelectric layers in the subsurface within the study area. These are the topsoil, weathered layer, partially weathered/ fractured basement and fresh basement. The overburden thickness varies fro m 2 to 18 m across the study area. This was used to prepare the groundwater potential map which assisted in the zoning o f the area into lo w, mediu m and high groundwater potential zones. About 85% of the study area falls within the low/ med iu m rated groundwater potential zone while the remaining 15% constituted the high groundwater potential zone. Hence, the groundwater potential rat ing of the area is considered generally low.

Asian Journal of Geological Research, Oct 30, 2018

Journal of Global Ecology and Environment

This investigation involves Vertical Electrical Sounding (VES) technique to detect the subsurface... more This investigation involves Vertical Electrical Sounding (VES) technique to detect the subsurface conductive zones as the groundwater potential zones within Ikare Akoko, southwestern Nigeria. Fifteen vertical electrical sounding were conducted using the SAS 1000 Terrameter equipment in E-W direction across the site using schlumberger array and horizontal profiling to narrow down the area of interest. Possible groundwater flow paths identified as conductive zones. The results showed that the conductive zones has the highest point with good aquifer apparent resistivity values with relatively thick overburden which were the major factors in determining the groundwater potential in the study area while those carried out on the non-conductive zones has the lowest point on the graph and were characterized by poor indication to groundwater potential of the area. The probable station more suitable for borehole construction in the study area were stations VES 1, 2, and 3 depicting high aquif...

Environmental Research, Engineering and Management, 2012

International Journal of Physical Research, 2020

Journal of Environment and Earth Science, 2012