Modeling of Groundwater Yield Using GIS and Electrical Resistivity Method in a Basement Complex Terrain, Southwestern Nigeria

Olubusola, Ilugbo Stephen; Daniel, Adebiyi; Oladimeji, Olomo

doi:10.9734/jgeesi/2018/42102

“…Improved water supply which is one of the essentials for a healthy living has been constrained by uncontrolled anthropogenic activities (Vijay et al 2011;Qin et al 2013;Chen et al 2016;Chitsazan et al 2019) and by lesser extent natural conditions (Izah et al 2016;Makinde et al 2017;Zadawa and Omran 2018). Characterization of groundwater in Nigeria, is further constrained by lack of data, especially from Basement Complex areas of northern Nigeria (Akinluyi et al 2018;Olubusola et al 2018;Oyedele and Olayinka 2019;Tajudeen et al 2019), owing to difficulties associated with groundwater exploration and accessibility (Betzler et al 2017;Muhammad and Saad 2018;Oyeyemi and Aizebeokhai 2018;Ahmed and Mansor 2018).…”

Section: Introductionmentioning

confidence: 99%

Hydrochemical characterization of shallow and deep groundwater in Basement Complex areas of southern Kebbi State, Sokoto Basin, Nigeria

Wali

¹

,

Umar

²

,

Abubakar

³

et al. 2019

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Groundwater under Basement Complex areas of southern Kebbi has been characterized in order to determine its suitability for drinking and irrigation use. Water samples were drawn from shallow groundwater (hand-dug shallow wells < 5 m) and deep groundwater (boreholes > 40 m). Physical parameters (i.e., temperature, TDS, pH, and EC), were determined in situ, using handheld meters. Discrete water samples were obtained for determination of chemical parameters. Results from severalsample ANOVA (Kruskal-Wallis test) suggested that heterogeneity in water table appeared to exert significant influence on groundwater chemistry which is characterized by a significant difference in pH, EC TH, Na + , Zn 2+ , Mg 2+ , PO 4 3− , Cl − , HCO 3 − , SO 4 2− , and NO 3 − concentrations. Also, ions including Fe 3+ , Zn 2+ , Mg 2+ , Na + , PO 4 3− , and SO 4 2− are above World Health Organization (2011) and National Standard for Drinking Water Quality (2007) reference guidelines. Most of the groundwater sources are moderately hard. Groundwater classification based on chloride, EC, and TDS revealed water of excellent quality for all types of uses. However, groundwater classification based on nitrate pollution revealed water of poor quality. Rock mineral is the major mechanism controlling water chemistry, as revealed by the Gibbs model. Most of the water sources have positive Scholler index, indicative of overall base exchange reactions in the underlying aquifers. Such condition was well explained by Piper trilinear diagram, which revealed two types of faces: Ca-Mg-HCO 3 and Ca-Mg-SO 4-Cl. The HCA categorized wells into three groups according to their hydrogeochemical physiognomies. Despite the significant difference in ions concentration and chemical indices, groundwater composition is more influenced by rock weathering than anthropogenic inputs. Groundwater evaluation for irrigation use indicates a significant difference in SAR level which is related to poor permeability index in shallow groundwater. Higher values of Kelly's index and magnesium adsorption ratio threatened groundwater suitability for irrigation use in the study area.

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“…Finally, the groundwater potential yield index (GWPYI) is computed using Equation 7 (Olubusola et al 2018).…”

Section: Aquifer Potentiality Evaluationmentioning

confidence: 99%

“…The computed values of GWYPI can be used to grade the groundwater potentiality based on the categorization of presented in Table 1 (Olubusola et al, 2018;Umoh et al, 2022a).…”

Section: Aquifer Potentiality Evaluationmentioning

confidence: 99%

Evaluation of Groundwater Potentiality and Quality in Ikot Ekpene-Obot Akara Local Government Areas, Southern Nigeria

Ekanem,

Udosen

2023

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Adequate supply of potable water in Ikot Ekpene-Obot Akara Local Government Areas (LGAs) in Akwa Ibom State, southern Nigeria has been of a serious concern in recent times. Consequently, this study’s major goal is to evaluate groundwater potentiality and quality in the LGAs via the use of the electrical resistivity technique and geochemical analysis of borehole water samples to map out the zones for the optimum location of boreholes in the area. The results of the Vertical Electrical Soundings (VES) performed at 28 locations in the area show that the lithological succession comprises sands and gravels with minor clay interbeddings at a number of locations. The main aquifer units in the area are found at depths of between 2.1 and 30.2 m, with resistivity values ranging from 40.6 to 2648.1 Ohms-metres. The generated groundwater potentiality map indicates that 89 % of the investigated area has high groundwater potential while 7 % and 4 % have low and moderate potentials respectively. The contamination level in the groundwater is shown to be very low or insignificant. Policymakers in the LGAs can use these insights to effectively manage and utilize groundwater to meet the needs of the masses.

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“…The computed values of GWYPI can be used to grade the groundwater potentiality based on the categorization of Olubusola et al (2018) and Umoh et al (2022a) presented in Table 1.…”

Section: Aquifer Potentiality Evaluationmentioning

confidence: 99%

Evaluation of Groundwater Potentiality and Quality in Ikot Ekpene-Obot Akara Local Government Areas, Southern Nigeria

Ekanem,

Udosen

2023

Preprint

0

View full text Add to dashboard Cite

Adequate supply of potable water in Ikot Ekpene-Obot Akara Local Government Areas (LGAs) in Akwa Ibom State, southern Nigeria has been of a serious concern in recent times. Consequently, this study’s major goal is to evaluate groundwater potentiality and quality in the LGAs via the use of the electrical resistivity technique and geochemical analysis of borehole water samples to map out the zones for the optimum location of boreholes in the area. The results of the Vertical Electrical Soundings (VES) performed at 28 locations in the area show that the lithological succession comprises sands and gravels with minor clay interbeddings at a number of locations. The main aquifer units in the area are found at depths of between 2.1 and 30.2 m, with resistivity values ranging from 40.6 to 2648.1 Ohms-metres. The generated groundwater potentiality map indicates that 89 % of the investigated area has high groundwater potential while 7 % and 4 % have low and moderate potentials respectively. The contamination level in the groundwater is shown to be very low or insignificant. Policymakers in the LGAs can use these insights to effectively manage and utilize groundwater to meet the needs of the masses.

show abstract

Modeling of Groundwater Yield Using GIS and Electrical Resistivity Method in a Basement Complex Terrain, Southwestern Nigeria

Cited by 5 publications

References 7 publications

Hydrochemical characterization of shallow and deep groundwater in Basement Complex areas of southern Kebbi State, Sokoto Basin, Nigeria

Hydrochemical characterization of shallow and deep groundwater in Basement Complex areas of southern Kebbi State, Sokoto Basin, Nigeria

Evaluation of Groundwater Potentiality and Quality in Ikot Ekpene-Obot Akara Local Government Areas, Southern Nigeria

Evaluation of Groundwater Potentiality and Quality in Ikot Ekpene-Obot Akara Local Government Areas, Southern Nigeria

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