Series-3 (Nov. – Dec. 2019)Nov.-Dec. 2019 Issue Statistics
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Abstract: The survey was aimed at evaluating the subsurface geotechnical competence at Alagbaka extension, Akure, south-western Nigeria. Electrical resistivity method involving Schlumberger array of Vertical Electrical Sounding (VES) technique was used in combination with the conventional engineering geological methods. Twenty-six (26) VES stations were occupied within the study site with maximum half-current electrode spread of 100 m. The engineering geological study involved twenty-six (26) soil samples (26) collected at a common depth of 2 m at the same locations with VES stations. The samples were analyzed for natural moisture content, grain size analysis, Atterberg limits, standard compaction, unconfined compressive strength and consolidation tests. The VES results delineated four geoelectric layers, which comprises of the top-soil, weathered layer, partially weathered/partially fractured.....
Keywords : Geophysics; electrical, geoelectric, engineering geology, subsurface competence, shear strength; foundations and subsoil competence.
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Abstract: Environmental impact of granite mining in Tattara area, North Central Nigeria was investigated through the analysis of geologic material which includes rocks, soil, water and physical examination of land degradation with the aim of accessing its impact on the environment and public health. These samples were subjected to petrographic and geochemical analysis to determine the concentration of heavy metals in the samples using Atomic Absorption Spectroscopy (AAS). The water from the reservoir and the mine showed concentration of lead (4.48mg/l) and cadmium (1.2mg/l) to be higher than the WHO 2011 and NIS 2007standard guideline for drinking water (which is 0.01mg/l and 0.03mg/l respectively). The result for soil analysis showed that the soil samples from the river and the village were all below DPR, 2002 standard for soil except for cadmium, while soil sample from the reservoir......
Keywords : Granite, Mining, Heavy metals, Microscopic analysis, Water Quality, Soil Quality, Tattara Area.
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Abstract: The study is aimed at investigating the subsurface corrosivity at Ilaramokin near Akure, southwestern Nigeria. Thirty (30) geoelectric Sounding data were acquired using Schlumberger array. The geoelectric sounding results delineated 3 - 5 geoelectric layers across the study area. The top soil resistivity values range from 48 - 721 Ωm indicating possible clay, sandy clay, clayey sand and lateritic clay lithologies. The weathered layer resistivity varies from 21 - 1800 Ωm, while the resistivity value of the weathered/fractured basement ranges from 15 - 435 Ωm. The presumed bedrock resistivity values range from 382 - 7557 Ωm. The results were also presented as iso-resistivity maps at different depth slices (1, 2 and 3 m). The iso-resistivity depth slice map at 1 m indicates that the northeastern part of the area is strongly corrosive (60 - 150 Ωm). The iso-resistivity depth slice map at 2 m shows that the central part of the area is strongly corrosive (60 - 150 Ωm) to very strongly corrosive (less than 60 Ωm). The iso-resistivity depth slice map at 3 m indicates that the southwestern part of the area are strongly corrosive (60 - 150 Ωm) to very strongly corrosive (less than 60 Ωm). The depth slice iso-resistivity at 2 m was.....
Keywords:Geoelectric, subsurface, physic-chemical, iso-resistivity, depth-slices and corrosivity.
[1]. Adeyemo, I. A. Olumilola, O. A. and Ibitomi, M. A. (2018): Geoelectrical and Geotechnical Investigations of Subsurface Corrosivity in Ondo State Industrial Layout, Akure, Southwestern Nigeria. Ghana Mining Journal. (Vol. 18, No. 1, 20 - 31. https://dx.doi.org/10.4314/gm/v18i1.3.
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[4]. Chesnokova, M. G., Shalaj, V. V., Kraus, J. A., Cherkashina,, N. V. and Mironov A. Y. (2016): Analysis of corrosion defects on oil pipeline surface using scanning electron microscopy and soil thionic and sulfate-reducing bacteria quantification. International Conference on Ol and Gas Engineering, Procedia Enginering. 152, pp 247 - 250.
[5]. Dan Hassan, M. A. and Olorunfemi, M. O. (1999): Hydrogeophysical Investigation of a Basement Terrain in the North central part of Kaduna State, Nigeria. Journal of Mining and Geology, Vol. 35 (2), pp. 189-206.
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Abstract: Geoelectric sounding technique of electrical resistivity method and hydrogeologic measurement involving static water level measurement were utized in predicting the foundation beds competence of the residential area located at eastern border of the Federal University of Technology, Akure campus, Nigeria.. The geoelectric sounding survey delineated eight curve types in the study area namely the A, H, HA, KH, HK, QH, HKH and KHA type. The 3 to 5 geoelectric layers delineated from the study area corresponds to the top soil, weathered layer, weathered basement, fractured basement and the presumed fresh bedrock. The layer resistivity varies respectively from 5 - 213 Ωm, 5 - 593 Ωm, 7 - 1156, 14 - 649 Ωm and 72 - 2968 Ωm in the top soil, weathered layer, weathered basement, fractured basement and the presumed fresh bedrock. The 0.5 m iso-resistivity depth slice map of the study area shows that about 75 % of the area are of low resistivity (60 - 150 Ωm) and are thus classified as low competence area. Similarly the 1.0 m iso-resistivity depth slice map shows that about 65 % of the area.......
Keywords:Geoelectric sounding,static water level,depth slice isoresistivity, longitudinal resistivity and geotechnical competence.
[1]. Adeyemo, I. A., Bamidele O. E. and Obatayo, O. B. (2014a): Geoelectric Survey for Post-Foundation Investigation of a Distressed Building at Ade Super Hotel Akure, Southwestern Nigeria. International Journal of Engineering and Sciences (IJES), Vol. 3, Issue 2, pp. 35 - 42
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[5]. Delleur, J.W. (1999): Elementary Groundwater Flow and Transport Processes, In Handbook of Groundwater Engineering, Edited by J.W. Delleur, 41p.
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Abstract: The School of Earth and Mineral Sciences (SEMS) of the Federal University of Technology, Akure Nigeria is facing an acute water shortage. At the moment the entire school depends only on a seasonal hand dug well and several hydro-geophysical surveys carried in the environment to locate possible point for groundwater development were unsuccessful. This study combined two techniques of electrical resistivity method; the Wenner-Schlumberger (a 2-Dimensional resistivity technique) and Schlumberger arrays (vertical electrical survey). The Wenner-Schlumberger array was deployed as a reconnaissance tool to determine probable locations for the vertical electrical sounding (VES) survey. The Wenner-Schlumberger survey was done along 8 traverses. Nine (9) VES points were.....
Keywords: Electrical resistivity method, Wenner-Schlumberger array, vertical electrical sounding, geologic contact, fractures, faults and bedrock depression.
[1]. Abiola, O., Enikanselu, P.A. and Oladapo, M.I., 2009. Groundwater Potential and Aquifer Protective Capacity of Overburden Units
in Ado-Ekiti, Southwestern Nigeria. International Journal of Physical Sciences. 4 (3):120 - 132.
[2]. Adeyemo, I.A., Omosuyi, G.O., Olayanju, G.M. and Omoniyi, G.K., 2014. Hydrogeologic and Geoelectric Determination of
Groundwater Flow Pattern in Alaba - Apatapiti layouts, Akure, Nigeria. The International Journal of Engineering and Science
(IJES). 3:44 - 52.
[3]. Adeyemo, I.A., Omosuyi, G.O., Ojo, B.T. and Adekunle, A., 2017. Groundwater Potential Evaluation in a Typical Basement
Complex Environment Using GRT Index - A Case Study of Ipinsa-Okeodu Area,[4]. Near Akure, Nigeria. Journal of Geoscience and Environment Protection (GEP), Scientific Research, 5(3): 240 - 251, doi.org/10.4236/gep.2017.53017
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Abstract: We present a technique that enhances the visualization of the shallow subsurface using 3-D electrical resistivity imaging. In the cost-effective strategy, 3-D data sets are collated from independent parallel 2-D survey profiles from which resistivity depth slices are generated. The subsurface is thus mirrored both in 2D and 3D for enhanced imaging. The technique proves robust in subsurface characterization and was used to successfully delineate static groundwater level, direction of groundwater flow and subsurface lithologic pattern in the study area. These deliverables are essential information required for critical decision making in a wide range of field applications.
Keywords: resistivity,geoelectrical, characterization, subsurface imaging.
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[3]. Amidu, S. A. and Olayinka, A. I. (2006). Environmental assessment of sewage disposal systems using 2D electrical resistivity imaging and geochemical analysis: a case study from Ibadan, southwestern Nigeria. Environ EngGeosci 7(3):261–272
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Abstract: Quality of life (QoL) is a comprehensive concept used to assess a society's standard of living in all aspects of life. This research aims at developing an objective measurement of urban QoL by considering the Employment of the aspect at the neighborhood level and applying the geographic information systems (GIS) technology to extract the employment characteristics. The paper also aims to address the notion of sustainable development and tries to understand its relationship with the notion of quality of life. On the other hand, this paper discusses contemporary urban planning theories and approaches in order to provide a high and sustainable quality of life and protect the natural environment. Finally, a matrix concluding the relationship between the principles of these contemporary urban planning theories and approaches and urban quality of life dimensions is developed, in order to achieve a set of principles that address, Employment,.....
Keywords: Quality of life, Sustainable development, urban quality of life, Employment, Gun Factory Munger
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