Hydrochemical and Isotopic Characterisation of Groundwaters in the Eastern Region of Ghana

Ganyaglo, Samuel Y.; Banoeng-Yakubo, Bruce; Osae, S.; Dampare, Samuel B.; Fianko, Joseph Richmond; Bhuiyan, Mohammad Amir Hossain

doi:10.4236/jwarp.2010.23022

Cited by 37 publications

(15 citation statements)

References 5 publications

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“…The mean transmissivity in the area is 120.74 m 2 /day. The average depth of boreholes in the area is 40 m. The range is 33-48 m. Borehole lithologic logs studied show that groundwater occurs in the weathered portions of the various rocks and are therefore described as weathered zone aquifers (Ganyaglo 2004). It should, however, be noted that some of the weathered zone aquifers are fracture related.…”

Section: Geology and Hydrogeologymentioning

confidence: 96%

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Water quality assessment of groundwater in some rock types in parts of the eastern region of Ghana

et al. 2010

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A baseline study involving analyses of subsurface water samples from the Cape Coast granitoid complex, Lower Birimian, Togo Formation and the Voltaian Group, was carried out to assess their suitability for drinking, domestic and agricultural purposes. Study results show that pH within the range (3.0 B pH B 6.5) constitutes 74% of the boreholes analysed, and 51% have hardness values ranging from 7.89 to 73.24 mg/l as CaCO 3 and are described as soft. Total dissolved solids are less than 1,000 mg/l and generally characterized by low conductivity values, of which 95% are within the range (55 B EC B 1,500 lS/cm). The mean values of the major cations (Ca 2? , Mg 2? , Na ? , K ? ) and anions (SO 4 2-, Cl -, HCO 3 -) are all within the World Health Organisation (WHO) standards. Five (5) of the boreholes sampled have nitrate (NO 3 -) contamination. Even though NO 3 -contamination and acidic waters exist in some of the boreholes, the majority of the boreholes are excellent for drinking and domestic purposes. Assessment of the groundwaters for agricultural irrigation revealed three main categories. These are low salinity-low sodicity (C1-S1), medium salinity-low sodicity (C2-S1) and high salinity-low sodicity (C3-S1), using the US Salinity Laboratory (USSL) classification scheme. As much as 95% of the samples plotted in the 'excellent to good' and 'good to permissible' categories on the Wilcox diagram. The groundwater in the study area may therefore be regarded as good for irrigation activities. The major identifiable geochemical processes responsible for the evolution of the various ions are mineral weathering and chemical reactions.

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Section: Geology and Hydrogeologymentioning

confidence: 96%

“…Available data indicate that the average overburden thickness ranges from 4 m in the Upper Voltaian to 34 m in the Togo Formation (Ganyaglo 2004). Generally, the weathered zone consists of lateritic, pebbly sandy and clayey soil.…”

Section: Geology and Hydrogeologymentioning

confidence: 98%

Water quality assessment of groundwater in some rock types in parts of the eastern region of Ghana

et al. 2010

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“…The basic sources of calcium are carbonate rocks, i.e., limestones and dolomites, which are dissolved by carbonic acid in groundwater. The chemical breakdown of calcic-plagioclase feldspars and pyroxenes may be responsible for calcium in the groundwater (Ganyaglo et al 2010). Calcium can also originate as lime in agricultural fertilizers.…”

Section: Mh =mentioning

confidence: 99%

Hydrochemical evaluation of groundwater quality of the Tista floodplain, Rangpur, Bangladesh

2019

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The Tista is a Trans-Himalayan river that flows through Sikkim and West Bengal states of India and Rangpur division of Bangladesh and finally falls into the Brahmaputra River. The presence of numerous abandoned channels with various degrees of aggradations indicates large migrations of the Tista River. The pH value of groundwater varies from 6.20 to 7.40 which indicate the slightly alkaline to acidic nature of the studied aquifers. The mean abundance of major cations is Na + > Ca +2 > Mg +2 > K + , whereas the major anions is HCO 3 − > Cl − > SO 4 −2. Among the cations, Na + is the dominant and K + is the lowest constituents, whereas HCO 3 − is most abundant and SO 4 −2 is the minor constituents in anions. The hydrochemical facies of groundwater show that sodium, sodium-magnesium, sodium-calcium, sodium-magnesium-calcium and sodium-calcium-magnesium are cation facies and chloride-bicarbonate, bicarbonate-chloride and bicarbonate are anion facies. Correlating with WHO (Guidelines for drinking-water quality, 1, World Health Organisation, Geneva, 1997) and EQS (Environmental quality standard, Department of Environment, Bangladesh, 1989) guideline values for drinking water and public health, it may be concluded that the groundwater of the study area is suitable for all drinking and domestic purposes, where only three samples exceed the maximum allowable limit of potassium. Based on total hardness, SAR, RSC, PI, SSP and MH values, it can be summarized that the groundwater of the investigated area is suitable for irrigation purpose. On the basis of Australian and UNESCO standard, the groundwater of the study area is also suitable for livestock purposes. The Rangpur area is hydrogeologically active by the processes like ion exchange and dissolution. Ca 2+ , Mg 2+ and HCO 3 − are produced by the dissolution of limestone and dolomite.

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“…This geological formation covers about 90% of the basin and is composed of rocks such as gneiss, granites and granodiorites. These gneissic rocks are intruded by both acidic and basic igneous rocks, which include white and pink pegmatite, aplite, granodiorite and dolerite dykes [27] [28].…”

Section: Geologymentioning

confidence: 99%

“…[28]. The secondary porosity and flow guiding structures have been created mainly by tectonic processes such as folding, mineral orientation, fracturing and faults, shrinking during cooling of rock mass and weathering [28] [29].…”

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Hydrogeological and Hydrochemical Assessment of Basin Granitoids in Assin and Breman Districts of Ghana

Annor¹,

Acquah²,

Ansah³

2018

GEP

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Hydrogeological and hydrochemical assessments were carried out in Assin and Breman districts of Ghana. A multi-criteria approach was used in the assessment of the basin granitoids including; electrical resistivity survey, pumping test and water quality analysis. A total of twenty-five (25) representative boreholes were drilled, developed and pumped; obtaining data for aquifer hydraulic parameters estimation. Correlation analysis was used to determine relationships that exist between aquifer hydraulic parameters. Schoeller, Piper, Stiff plot and Gibbs diagrams were used to determine the hydrogeochemical facies, water types and the mechanism that control groundwater quality. The statistical analysis determined that aquifer hydraulic parameters discharge rate (Q), hydraulic conductivity (K) and Transmissivity (T) showed a strong positive correlation with specific capacity (Q/S w) with R value 0.8462, 0.8738 and 0.8332 respectively. The K and T were respectively between 0.02-0.90 m/day and 0.36-13.47 m 2 /day with mean of 0.24 m/day and 3.03 m 2 /day respectively. The K values indicate a hydrogeological condition of aquiclude with relatively low permeability and medium water bearing capacity. The aquifer T magnitude is very low to low, groundwater potential is adequate for local water supply with limited and private consumption. All physicochemical parameters were within the permissible limits of Ghana Standards Authority (GSA) and World Health Organisation (WHO) except for apparent colour, pH, Fe and Mn. Distribution of major ions in groundwater samples was calculated and the general trend among cations and anions was found to be

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Hydrochemical and Isotopic Characterisation of Groundwaters in the Eastern Region of Ghana

Cited by 37 publications

References 5 publications

Water quality assessment of groundwater in some rock types in parts of the eastern region of Ghana

Water quality assessment of groundwater in some rock types in parts of the eastern region of Ghana

Hydrochemical evaluation of groundwater quality of the Tista floodplain, Rangpur, Bangladesh

Hydrogeological and Hydrochemical Assessment of Basin Granitoids in Assin and Breman Districts of Ghana

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