RMZ â MATERIALI IN GEOOKOLJE

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374 Sunmonu, L. A., Adagunodo, T. A., Olafisoye, E. R., Oladejo, O. P.Figure 3(b). The modeled curve for VES 7 to VES 10.The modeled curves showed threelayers in nine of the VES stations(i.e. VES 1, 2, 3, 4, 5, 6, 7, 9 and 10)and four layers in the remaining one(i. e. VES 8) (figure 3a–b). The resultshowed that 60 % of the VES stationshave thin overburden and fresh basementrocks (i.e. VES 1, 3, 4, 5, 7 and10), 20 % of the VES stations havethick overburden and fresh basementrocks (i.e. VES 8 and 9) while theremaining 20 % of the VES stationshave thick overburden and fracturedbasement rocks (i. e. VES 2 and 6).From the results, VES 2 and 6 arethe best location for groundwaterprospect because of the thick overburdenand fracture in the basement(Wright, 1990; Meju et al., 1999).VES 8 and 9 could be consideredas another location for groundwaterexploration because Benson& Jones (1988) and Lenkey et al.(2005) reported that boreholesshould be sited where the regolithis thickest.Summary of the formation ofthe layer parameters is presentedin table 1 while summary ofclassification of the resistivitysounding curves is presented intable 2.<strong>RMZ</strong>-M&G 2012, 59
The groundwater potential evaluation at industrial estate Ogbomoso, ...375Table 1. Summary of the formation of layer parameters.LocationVES 1VES 2VES 3VES 4VES 5VES 6VES 7VES 8VES 9VES 10Layer 1 Layer 2 Layer 3 Layer 4ρ 1/(Ω m) h 1/m ρ 2/(Ω m) h 2/m ρ 3/(Ω m) h 3/m ρ 4/(Ω m) h 4/m400.3222.2280.7197.8190.3215.4100.4230.9228.1220.12.62.31.82.24.52.32.03.01.42.3100.790.461.550.286.541.876.0988.430.4100.16.518.87.94.14.817.02.45.518.16.995835.0606.42160.84580.41830.7271.84344.4128.56781.74036.2-------9.0---------14522.8------------Table 2. Classification of the resistivity sounding curves.Curve types Resistivity model Model frequency VES LocationsHKHρ 1> ρ 2< ρ 39ρ 1< ρ 2> ρ 3< ρ 411, 2, 3, 4, 5, 6, 7, 9, 108Total10Groundwater Potential EvaluationThe groundwater potential of a basementcomplex area is determined bya complex inter-relationship betweenthe geology, post emplacement tectonichistory (fractures), weathering processesand depth, nature of the weatheredlayer, groundwater flow pattern,recharge and discharge processes(Olorunfemi et al, 1999). The groundwaterpotential of the study area wasevaluated based on maps (i.e. overburdenthickness, anisotropic coefficient,weathered layer isothickness, weatheredlayer isoresistivity, transverseresistance and bedrock relief maps)generated from the VES interpretationresults. The characteristic geoelectricparameters enabled the groundwaterpotential rating at each VES location.These maps are as presented below.Overburden Thickness Isopach MapThe depth to the basement (overburdenthickness) beneath the sounding stationswere plotted and contoured at 1minterval as shown in figure 4. This wasdone to enable a general view of theaquifer geometry of the surveyed area.The overburden is assumed to includethe topsoil, the lateritic horizon and theclay/weathered rock. The values rangefrom 4.4 m to 21.1 m. Areas with thickoverburden corresponding to basement<strong>RMZ</strong>-M&G 2012, 59
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444 Lajovic, A.disc brakes, further
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446 Lajovic, A.Slika 2. Izrez iz Si
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448 Lajovic, A.Livne lonce smo na n
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450 Lajovic, A.Ingersol pa je bil z
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452 Lajovic, A.Med delavci, ki so b
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454 Lajovic, A.imel vsak delavec na
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456 Lajovic, A.Slika 5. Izdelki Že
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458 Lajovic, A.pa se ni najbolje iz
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460 Lajovic, A.za delo. Promet na z
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462 Lajovic, A.Sredi osemdesetih le
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464 Lajovic, A.njem delu forme. Na
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466 Lajovic, A.Enourni film je mars
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470 Medved, J., Rosina, A., Vončin
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472 Author’s IndexAuthor`s Index,
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Contents476Phase contrast method fo
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Contents47859/4Calculation of stres
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Instructions to authors481Compositi
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Instructions to authors483NAVODILA
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Instructions to authors485Knjige:Ro
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Template487TEMPLATEThe title of the
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