Numerical analysis of groundwater flow and potential in parts of a crystalline aquifer system in Northern Ghana

Yidana, Sandow Mark; Alo, C. A.; Addai, Millicent Obeng; Fynn, Obed Fiifi; Essel, Samuel

doi:10.1007/s13762-015-0805-2

Cited by 10 publications

(3 citation statements)

References 30 publications

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“…Stable isotopes and radioactive isotopes have wide applications in hydrological investigations and provide vital information, for example, aquifer-aquifer interconnection, groundwater age and sources of groundwater pollution [13,14]. These applications are fundamentally focused on the general principle of tracing.…”

Section: Overview Of Isotope Application In Groundwater Studiesmentioning

confidence: 99%

A Review on the Application of Isotopic Techniques to Trace Groundwater Pollution Sources within Developing Countries

Sankoh

Derkyi

Frazer-Williams

et al. 2021

Water

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Owing to a lack of efficient solid waste management (SWM) systems, groundwater in most developing countries is found to be contaminated and tends to pose significant environmental health risks. This review paper proffers guidelines on the application of isotopic techniques to trace groundwater pollution sources from data spanning from 2010 to 2020 within developing countries. Earlier groundwater studies in those countries were mainly focused on using hydrochemical and geophysical techniques. The limitation of these techniques is that they can only monitor the concentration of pollutants in the water bodies and possible leachate infiltration but cannot determine the specific sources of the pollution. Stable isotopes of δ18O, δ2H and δ13C can confirm leachate migration to water bodies due to methanogenesis. The high tritium in landfill leachates is useful to identify leachate percolation in groundwater. The δ15N technique has been used to distinguish between synthetic and organic nitrogen sources but its application is limited to differentiating between atmospheric vs. inorganic nitrogen sources. The use of a dual isotope of δ15N–NO3− and δ18O–NO3− is beneficial in terms of identifying various sources of nitrogen such as atmospheric and inorganic fertilizers but is yet to be used to differentiate between nitrogen pollution sources from dumpsites, sewage and animal manure. The coupling of the 11B isotope with δ15N–NO3− and δ18O–NO3− and other hydrochemical parameters has proven to be effective in distinguishing between nitrate fertilizer, animal manure, seawater contamination and sewage. Therefore, in areas affected by agricultural activities, landfill leachates, domestic or sewage effluent and seawater intrusion, it is incumbent to couple hydrochemical (Cl−, NO3−, B, DO) and isotope techniques (δ18O, 2H, δ13C, δ18O–NO3−, δ15N–NO3−, δ11B and 3H) to effectively determine pollution sources of groundwater in developing countries. The foregoing review will provide guidelines for studies that may aim to critically distinguish between seawater intrusion, dumpsites, sewage and septic leachates.

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Section: Overview Of Isotope Application In Groundwater Studiesmentioning

confidence: 99%

A Review on the Application of Isotopic Techniques to Trace Groundwater Pollution Sources within Developing Countries

Sankoh

Derkyi

Frazer-Williams

et al. 2021

Water

View full text Add to dashboard Cite

show abstract

“…Numerical simulation with the predictive capability is a feasible method for solving the sustainability problems of groundwater management (Ghassemi et al 1997;Narayan et al 2007;Ayvaz and Karahan 2008;Rejani et al 2008Rejani et al , 2009Singh 2010Singh , 2014Lu et al 2013). The simulation results of existing or proposed groundwater management schemes can help to identify the sustainable groundwater exploitation amount and a reasonable groundwater exploitation scheme for the future (Paniconi et al 2001;Zhou et al 2003;Barazzuoli et al 2008;Jhorar et al 2009;Pongkijvorasin et al 2010;Chandio et al 2012;Nocchi and Salleolini 2013;El-Kadi et al 2014;Yidana et al 2015;Lathashri and Mahesha 2016).…”

Section: Introductionmentioning

confidence: 99%

Study on the groundwater sustainable problem by numerical simulation in a multi-layered coastal aquifer system of Zhanjiang, China

Zhou

Lu³

2017

J Earth Syst Sci

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Assessing sustainability of coastal groundwater is significant for groundwater management as coastal groundwater is vulnerable to over-exploitation and contamination. To address the issues of serious groundwater level drawdown and potential seawater intrusion risk of a multi-layered coastal aquifer system in Zhanjiang, China, this paper presents a numerical modelling study to research groundwater sustainability of this aquifer system. The transient modelling results show that the groundwater budget was negative (−3826 × 10 4 to −4502 × 10 4 m 3 /a) during the years 2008-2011, revealing that this aquifer system was over-exploited. Meanwhile, the groundwater sustainability was assessed by evaluating the negative hydraulic pressure area (NHPA) of the unconfined aquifer and the groundwater level dynamic and flow velocity of the offshore boundaries of the confined aquifers. The results demonstrate that the Nansan Island is most influenced by NHPA and that the local groundwater should not be exploited. The results also suggest that, with the current groundwater exploitation scheme, the sustainable yield should be 1.784 × 10 8 m 3 /a (i.e., decreased by 20% from the current exploitation amount). To satisfy public water demands, the 20% decrease of the exploitation amount can be offset by the groundwater sourced from the Taiping groundwater resource field. These results provide valuable guidance for groundwater management of Zhanjiang.

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“…Numerical modeling is an important part of modern hydrogeology due to the fact that it can be used to test certain specific hypothesis, to predict future behavior, or to simply organize available hydrogeological data (Seneviratne, 2007). Groundwater flow models have been used all over the world to help provide detailed characterization of certain key aquifer parameters and general flow pattern and to evaluate regional aquifer resources to make informed management decisions (Yidana et al, 2015). To begin the whole modeling process, a conceptual model was created, which is basically a summation of the knowledge gathered from reports, publications, and data.…”

Section: Numerical Groundwater Modeling Using Modflowmentioning

confidence: 99%

Capture Zone Analysis of a Wellfield to Assess Contaminant Transport

Oware¹

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Model Gaps and Recommendation CHAPTER VI: CONCLUSIONS REFERENCES groundwater. Due to the importance of those two isotopes in groundwater, Ra concentrations in groundwater are usually reported with respect to the combined concentration of those two isotopes, 226 Ra and 228 Ra with half-lives of 1600 years and 5.75 years, respectively (Kelly, 2008). Ra concentrations in groundwater differ because of differences in chemical properties of the parent isotopes at the head of the decay series, either 232 Th, 235 U, or 238 U (Stackelberg, 2018). The Thorium isotopes 228 Th 230 Th, and 232 Th, which are said to be insoluble in groundwater, are the immediate radioactive sources for 226 Ra, 228 Ra, and 224 Ra respectively (Stackelberg, 2018). 224 Ra has a half-life of 3.6 days and its concentration declines rapidly after about one half-life, whiles 223 Ra occurs infrequently in the environment at high concentrations (Stackelberg, 2018), hence both are not reported for combined Ra levels in drinking waters. Ra has been identified as the most potentially hazardous naturally occurring radionuclide likely to occur in drinking water (Szabo et al., 2012). Radium in drinking water increases cancer risk, primarily bone and sinus cancers (Szabo et al., 2012). The risk incurred from alpha particle emission depends on the way the body metabolizes the ingested radionuclide (Szabo et al., 2012). The Maximum Contaminant Level (MCL) for combined Ra is 5 picocuries per liter (pCi/L), which is set by the United States Environmental Protection Agency (USEPA) (Stackelberg, 2017). Radium in Northern Illinois The Cambrian-Ordovician aquifer system underlies area of 476,560 km 2 extending across parts of Midwestern states (Stackelberg, 2018). Within the northern part of Illinois, the Cambrian-Ordovician aquifer system is used as an important source of domestic and public water supplies. Concentrations of naturally occurring radioactive isotopes 226 Ra and 228 Ra in excess of the USEPA standard for drinking water has been detected in water from deep bedrock aquifers used for public water supply (Kay, 1999). One of the distinct stratigraphic difference between areas having higher concentration of Ra recorded in drinking water supplies and areas not having higher concentration is the presence of the Maquoketa

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Numerical analysis of groundwater flow and potential in parts of a crystalline aquifer system in Northern Ghana

Cited by 10 publications

References 30 publications

A Review on the Application of Isotopic Techniques to Trace Groundwater Pollution Sources within Developing Countries

A Review on the Application of Isotopic Techniques to Trace Groundwater Pollution Sources within Developing Countries

Study on the groundwater sustainable problem by numerical simulation in a multi-layered coastal aquifer system of Zhanjiang, China

Capture Zone Analysis of a Wellfield to Assess Contaminant Transport

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