Hydrogeological studies on the Tarkwa gold mining district, Ghana

Kuma, Jerry S.

doi:10.1007/s10064-006-0048-z

Cited by 17 publications

(13 citation statements)

References 18 publications

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“…This is as a result of infiltration of about 18% to 36% (average 27%) of the mean annual precipitation. The high average value of 385 mm/yr is reasonable on the basis that it represents the potential maximum value of the actual recharge value of 299±72 mm/yr as reported by Kuma (2007).…”

Section: Discussionsupporting

confidence: 71%

“…The study area is located in the Ankobra Basin, which is bordered to the west by the Ankobra River that flows towards the south, and the north and south by the Huni and Bonsa Rivers, respectively. The area is highly dissected and has moderate relief with a general decrease in elevation southwards (Kuma, 2007). The main types of soil in the area are the forest oxysols in the south and the forest ochrosol-oxysol in the north (Asklund & Eldvall, 2005), and consists mostly of silty-sands with minor patches of laterite (mainly on the hilly areas) and underlain by the Banket Series and Tarkwa Phyllite rocks (Kuma & Younger, 2001;Kortatsi, 2004).…”

Section: Study Area Descriptionmentioning

confidence: 99%

“…Using the water budget method, Kuma (2007) estimated a recharge rate of (299±72) mm/yr for the study area. According to these researchers, the humid climate of Tarkwa district is characterized by a surplus of precipitation over soil evaporation and plant transpiration, with no distinct monsoon.…”

Section: Introductionmentioning

confidence: 99%

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Characterization of Potential Direct Recharge in the Gold Mining District of South-Western Ghana Using the Hydrus-1D Computer Code

Sam¹,

Amoako²,

Sefa-Ntiri³

et al. 2018

JGG

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The mean annual potential recharge rate to the ground water system in the Tarkwa gold mining district of South Western Ghana, has been estimated for the period 1977 to 2001 by analyzing precipitation recharge in response to rainfall pattern and distribution for the four main soil types; Huni, Tarkwa Phyllite, Banket and Kawere. Using the Hydrus-1D infiltration computer code model, simulation results of recharge-precipitation exhibited a linear relationship, and gave correlation coefficient values R 2 ranging from 0.39 to 0.55 for the four soil types and 0.72 for the composite soil. Variability of annual recharge was assigned to various reasons, including the variation in the weather pattern (rainfall, temperature, evapotranspiration etc), topography and hydraulic properties of the aquifer system. The potential direct recharge rate was estimated to range from 269 mm/yr to 611 mm/yr, with an average value of 385 mm/yr. This is as a result of infiltration of about 18% to 36% (average 27%) of the mean annual precipitation. The high average value of 385 mm/yr is reasonable on the basis that it represents the potential maximum value of the actual recharge value of 299±72 mm/yr.

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Section: Discussionsupporting

confidence: 71%

Section: Study Area Descriptionmentioning

confidence: 99%

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Characterization of Potential Direct Recharge in the Gold Mining District of South-Western Ghana Using the Hydrus-1D Computer Code

Sam¹,

Amoako²,

Sefa-Ntiri³

et al. 2018

JGG

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“…The Tarkwa area lies within the main gold belt of Ghana that stretches from Axim in the southwest, to Konongo in the northeast (Kortatsi 2004). The total population of the Tarkwa Township is about 80,000 (Kumah 2007) with an estimated population of the District being 236,000 (IFC 2003;Darko et al 2010). In addition there are eight communities dotted around the mines (Table 1).…”

Section: Description Of Study Areamentioning

confidence: 99%

Assessment of public exposure to naturally occurring radioactive materials from mining and mineral processing activities of Tarkwa Goldmine in Ghana

Faanu

Ephraim

Darko

2010

Environ Monit Assess

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Studies have been carried out in a Goldmine in Ghana to determine the exposure of the public to naturally occurring radioactive materials from processing of gold ore. Direct gamma spectrometry and neutron activation analysis techniques were used to analyse soil, rock, water and dust samples from the mining environment. The mean activity concentrations measured for (238)U, (232)Th and (40)K in the soil/rock samples were 15.2, 26.9 and 157.1 Bq kg( - 1), respectively. For the water samples, the mean activity concentrations were 0.54 and 0.41 Bq l( - 1)) and 7.76 Bq l( - 1) for (226)Ra, (232)Th and (40)K, respectively. The mean activity concentrations measured in the dust samples were 4.90 and 2.75 μBq m( - 3) for (238)U and (232)Th, respectively. The total annual effective dose to the public was estimated to be 0.69 mSv. The results in this study compared well with typical world average values. The results indicate an insignificant exposure of the public from the activities of the Goldmine.

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“…In recent year public controversies about mining and sustainability have arose, due to the contribution of mining to socioeconomic development versus the environmental degradation [49]. Gold mining, in particular, has a negative image due to low contribution to local localities [50] that has been a determinant of illegal mining which in turn, has detrimental consequences to landscape such high levels of fragmentation, water pollution and loss of aquatic biodiversity [12].…”

Section: Assessment Of Sustainability Indicesmentioning

confidence: 99%

Using Social, Economic and Land-Use Indices to Build a Local Sustainability Index in a Mining Region of the Sierra Tarahumara, Mexico

et al. 2017

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Abstract:Ore mining has served as a predictor of economic wellbeing since it brought development to countries. However, these benefits do not always extend to all localities that comprised the center of this industry. This paper examined the contribution of mining to local communities. An index of local sustainability was constructed based on economic, social, and land-use data from twelve localities where mining and forestry are their major economic activities. Land-use variables were obtained from Landsat Thematic Mapper (TM 5) images for 2000, and Landsat Operational Land Imager (OLI8) for 2014, while the socio-economic variables were collected in twelve localities with an 85-question survey. A sustainability index was developed for each group of variables-economic (ESI), social (SSI) and land-use sustainability index (LUSI)-to further build a local sustainability index (LSI). Three localities showed the highest ESI (0.61, 0.53 and 0.43) and SSI (0.90, 0.79 and 0.78), while two localities had the lowest values in the ESI and SSI. In contrast, the highest value of LUSI was found in two other different localities and in one with lower SSI. Income from mining activities is positively associated with the ESI and SSI, but there was no evidence of linear association with the LUSI. A local index of sustainability provides useful information for planning and development strategies.

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Hydrogeological studies on the Tarkwa gold mining district, Ghana

Cited by 17 publications

References 18 publications

Characterization of Potential Direct Recharge in the Gold Mining District of South-Western Ghana Using the Hydrus-1D Computer Code

Characterization of Potential Direct Recharge in the Gold Mining District of South-Western Ghana Using the Hydrus-1D Computer Code

Assessment of public exposure to naturally occurring radioactive materials from mining and mineral processing activities of Tarkwa Goldmine in Ghana

Using Social, Economic and Land-Use Indices to Build a Local Sustainability Index in a Mining Region of the Sierra Tarahumara, Mexico

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