Determination of the mineral stability field of evolving groundwater in the Lake Bosumtwi impact crater and surrounding areas

Loh, Yvonne Sena Akosua; Yidana, Sandow Mark; Banoeng-Yakubo, Bruce; Sakyi, Patrick Asamoah; Addai, Millicent Obeng; Asiedu, Daniel K.

doi:10.1016/j.jafrearsci.2016.06.007

Cited by 15 publications

(9 citation statements)

References 32 publications

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“…Groundwater chemistry is dependent on several factors including the nature of recharge, the residence time of groundwater in the aquifer, rock-water interaction beneath the surface, chemical weathering rates and anthropogenic activities (Andre et al, 2005;Ekwere and Edet, 2012;Loh et al, 2016;Rao et al, 2019 andSivakarun N, et al, 2020). Each groundwater system in an area has a distinctive suite of chemical components, which is attributed as a result of chemical changes in the rainwater as it percolates through the aquifer system (Back,1966;Derver,1988;Zhu et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

Spatiotemporal variability in groundwater chemistry of a mountainous catchment with complex geologic and climate gradients in south west India

et al. 2021

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Mountainous catchments are one of the world's important water sources that sustains a major portion of global population and a rich biodiversity. The groundwater quantity and quality of mountainous watersheds are depended generally on the geologic characteristics and climate gradients. Although many groundwater studies have been carried out in the midlands and lowlands of many river basins, not enough focus has been paid to the mountainous catchments of tropics. Here we report a case study on groundwater quality and controlling factors of a mountainous catchments of the Western Ghats mountain ranges of peninsular India -the Bhavani river basin, which is identi ed as a testbed for longterm monitoring of the Critical Zone process. A total of 88 water samples were collected seasonally for assessing various physico-chemical parameters, solute contents and scaling properties. The results of the study revealed that the hydrochemistry of groundwater is in uenced by both silicate and carbonate weathering. Mineral stability indices computed for the groundwater reveal that about 52 % of the samples are supersaturated with carbonate minerals and often exhibit scaling due to solute overloading. Among the contributing factors that determine water quality of groundwaters, chemical weathering and anthropogenic activities play a signi cant role.

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Section: Introductionmentioning

confidence: 99%

Spatiotemporal variability in groundwater chemistry of a mountainous catchment with complex geologic and climate gradients in south west India

et al. 2021

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“…For instance, the dissolution of "hard" rocks and associated silicate minerals is a very slow process, aided by high temperatures and low pH. e influence of rock weathering on groundwater quality has been extensively documented in Ghana [6][7][8][9][10][11][12]. Furthermore, population growth, unplanned developments, and other anthropogenic activities have also been identified in the literature as sources of groundwater degradation [11,[13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Assessment of Groundwater Quality in the Talensi District, Northern Ghana

Chegbeleh

Akurugu

Yidana

2020

The Scientific World Journal

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A comprehensive chemical quality assessment of groundwater resources in the Talensi District has been conducted using conventional graphical methods and multivariate statistical techniques. The study sought to determine the main controls of groundwater chemistry and its suitability for domestic and irrigation purposes in the district. Silicate and carbonate mineral weathering were identified as the main controls on groundwater chemistry in the district, with reverse ion exchange also playing a role. High nitrate and lead levels observed have been associated with agrochemicals and wastewater from farms and homes. Three main flow regimes have been identified with Q-mode cluster analysis, in which mixed cation water types have been revealed, where areas designated as recharge zones are dominated by Na+ + K+–Mg2+–HCO3− fresh water types characterised by low mineralisation and pH, which evolve into Mg2+– Na+ + K+– HCO3− fresh water type with corresponding increased mineralisation of the groundwater. Based on the water quality index (WQI) technique modified for the district and an interpolation technique using ordinary kriging developed from a well-fitted exponential semivariogram for the estimated WQIs, the groundwater quality has been spatially classified as generally ‘good’ to ‘excellent’ for domestic purposes. Generally, the quality of groundwater for domestic usage deteriorates as one moves towards the north of the district, whereas waters in the east and west present the best quality. Classifications based on the United States Salinity Laboratory (USSL), Wilcox, and Doneen diagrams suggest that groundwater from the unconfined aquifers of the district is of excellent quality for irrigation purposes.

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“…Magnesium is the third dominant cation, and its occurrence in groundwater can be explained by the weathering and dissolution of biotite and chlorite minerals in the granite and Birimian rocks of the area (Clark 2015). It can be added that the dissolution of carbonate minerals such as dolomite (CaMg(CO3)2 and magnesite (MgCO3) in the underlying Birimian rocks may contribute to Mg 2+ enrichment in the groundwater (Mumin and Fleet 1994;Loh et al 2016 (Clark 2015).…”

Section: General Hydrochemistrymentioning

confidence: 99%

Hydrochemical peculiarities and groundwater quality assessment of the Birimian and Tarkwaian aquifer systems in Bosome Freho District and Bekwai Municipality of the Ashanti Region, Ghana

Okofo

Anderson²,

Bedu-Addo

et al. 2021

Preprint

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The Birimian and Tarkwaian aquifer systems are the main sources of water supply for the Bosome Freho District and Bekwai Municipality inhabitants in the Ashanti region of Ghana. A hydrogeochemical assessment was carried out to ascertain the natural baseline chemistry of the groundwaters and the factors influencing groundwater chemistry in these two areas. A multivariate statistical tool consisting of principal component analysis (PCA) and hierarchical cluster analysis (HCA) together with hydrochemical graphical plots was applied on 64 groundwater samples. The Q–mode HCA results were used to explain the groundwater quality flow paths where three spatial groundwater zones and water types were delineated. The first type consists of Ca–Mg–HCO3 freshwater (recharge zone), which transitions into Ca–Na–HCO3 or Na–Ca–HCO3 mixed waters (intermediate zone) and finally evolve to the third type of Na–Ca–Mg–HCO3–Cl water (discharge zone). The study also reveals that the natural process influencing water chemistry is groundwater–rock interaction from carbonate and silicate weathering/dissolution, aided by carbonic acid from precipitation and releases concentration of Na+, Ca2+, Mg2+ and HCO3- into the groundwaters significantly. The chloro-alkaline indices also reveal cation exchange as the principal natural factors that control groundwater chemistry in the area. Anthropogenic activities have little influence on groundwater chemistry. The quality of groundwater in the Bosome Freho District and Bekwai Municipality are suitable for irrigational use and drinking water consumption. The results obtained so far will contribute to research paucity in the study area and serve as a guide for decision-makers for improved water resources management.

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Determination of the mineral stability field of evolving groundwater in the Lake Bosumtwi impact crater and surrounding areas

Cited by 15 publications

References 32 publications

Spatiotemporal variability in groundwater chemistry of a mountainous catchment with complex geologic and climate gradients in south west India

Spatiotemporal variability in groundwater chemistry of a mountainous catchment with complex geologic and climate gradients in south west India

Assessment of Groundwater Quality in the Talensi District, Northern Ghana

Hydrochemical peculiarities and groundwater quality assessment of the Birimian and Tarkwaian aquifer systems in Bosome Freho District and Bekwai Municipality of the Ashanti Region, Ghana

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