Southwestern Ghana Research Articles

Implications of COVID-19 relief packages on livelihoods of rural dwellers in border towns along Southwestern Ghana

The global efforts to curtail the livelihood crises brought about by the eruption of the COVID-19 pandemic witnessed the adoption of livelihood strategies in the form of relief packages. Using a quantitative analytic framework, the article sheds light on recipients’ perspectives on the various government interventions in Ghana, focusing on how socio-economic and political inequalities in Ghana shaped access to pandemic relief support for rural dwellers in border towns in Southwestern Ghana. The findings suggest that, despite the partisan twist, the relief packages positively impacted intended beneficiaries in their short-term income-generation activities. Furthermore, it reduced the vulnerability of rural start-up businesses and brought the establishment of new health facilities to augment the infrastructural development of the area. The article concludes that the pandemic provided insight into how rural communities can better leverage relief packages to improve their livelihood conditions.

Geochemical vectors for targeting hydrothermal gold mineralization in the Damang area, southwestern Ghana: Constraints from petrography, multi-element geochemistry and multivariate statistical analysis

The Damang Gold Mine in southwestern Ghana sits on two kinds of mineralization: the Tarkwaian paleoplacer and a hydrothermal type found within the Tarkwaian Group's meta-sedimentary rocks. Geochemical vectors related to the hydrothermal gold mineralization in the area are not well known. Therefore, this research was conducted to identify pathfinders for hydrothermal gold mineralization in the Damang area. A total of fifty (50) rock samples were collected from three diamond drill holes focusing on mineralized zones of the holes. The mineralogy of the host rocks was established using petrographic studies of twelve (12) selected representative drill core samples. Multi-element geochemical analysis of the host rocks (n = 50) involving Inductively Coupled Plasma-Mass Spectrometry (ICP-MS) technique was conducted to quantify the trace element concentrations in the host rocks. The multi-element geochemical data was analyzed using multivariate statistics. The petrographic studies showed the abundance of quartz, biotite, pyrite, pyrrhotite, sericite, and minor amounts of feldspars (plagioclase and orthoclase). Al, Mg, Fe, and Ca dominated the geochemical data. The highest Au concentrations were found in Birimian quartz veins and the intrusive lithologies compared to the other lithologies in the region. Most of the data failed the Shapiro-Wilk and Kolmogorov-Smirnov tests. The deviations from normality were shown graphically by Q-Q plots. The centered log-ratio transformation was used to correct this, and the data tested again for normality. Spearman rank correlation showed a positive correlation between Te, Bi, U, Ba, Ag, and Au. When hierarchical cluster analysis was run, three clusters emerged with Au in the same cluster with Te, Ag, and Bi. Factor analysis served as a confirmatory test with Au in the same factor with Bi, Ag, and Te. Datamine Studio RM was used to create drillhole logs showing the anomalies of the three elements and Au with different lithologies downhole, which showed a similitude in the abnormal occurrences. Therefore, hydrothermal gold mineralization in the Damang area is related to Bi-Te-Ag-Au multi-element association.

Trading future sustainable livelihoods for present gain: labour dynamics, opportunities, challenges and sustainability of virgin coconut oil processing businesses in the wake of coconut exports from Southwestern Ghana

Trading future sustainable livelihoods for present gain: labour dynamics, opportunities, challenges and sustainability of virgin coconut oil processing businesses in the wake of coconut exports from Southwestern Ghana

Soil amendment-assisted phytoremediation with ryegrass offers a promising approach to mitigate environmental health concerns

This study aimed to examine the potential of soil amendment-assisted phytoremediation using ryegrass in reclaiming abandoned gold mine soil in southwestern Ghana, with a specific focus on the soil contamination hazards associated with metals and metalloids. A pot experiment lasting 60 days was carried out to assess the efficacy of soil amendments, such as compost, iron oxide, and poultry manure, in mitigating environmental hazards. Three soil contamination indices (soil contamination = CF, enrichment factor = ER, and pollution load index = PLI) were used to calculate the extent of soil contamination, enrichment, and pollution of the sites with Co, Hg, Ni, Mo, Se, Sb, and Pb. The findings show that Hg made the greatest contribution (with a maximum soil CF of 18.0) to the overall PLI, with a maximum value of 74.4. The sites were averagely and consequently enriched with toxic elements in the decreasing order: Ni (ER = 33.3) > Mo (20.5) > Sb (14.1) > Pb (11.0) > Hg (7.9) > Se (2.1). The bioaccumulation factor (BCF > 1) suggests that ryegrass has the ability to phytostabilize Co, Hg, Mo, and Ni. This means that the plant may store these elements in its roots, potentially decreasing their negative effects on the environment and human health. Ultimately, the addition of combined manure with iron oxides might have augmented the sequestration of these metals in the root. The elements may have accumulated through sorption on manure or Fe surfaces, dissolution from watering the plants in the pot, or mineralization of organic manure. Thus, ryegrass has shown potential for phytostabilisation of Co, Hg, Mo, and Ni when assisted with a combination of manure and iron oxides; and can consequently mitigate the environmental and human health impacts.

Agricultural Yield Responses to Climate Variabilities in West Africa: A Food Supply and Demand Analysis

Agricultural productivity is expected to decrease under changing climate conditions that correspond to the stability of West African food systems. Although numerous studies have evaluated impacts of climate variability on crop yields, many uncertainties are still associated with climate extremes as well as the rapid population growth and corresponding dietary lifestyle. Here, we present a food supply and demand analysis based on the relationship between climate change, crop production, and population growth in three sites from southwestern Burkina Faso to southwestern Ghana. Climate and agricultural time series were analyzed by using boxplots mixed with a Mann–Kendall trend test and Sen’s slope. Food balance sheets were calculated by estimating the demand using a population growth model linked to food supply with local consumption patterns. We found almost insignificant rainfall and temperature trends for both sites in the Sudano-Guinean savannah. Conversely, the climate regime of southwestern Ghana revealed a strong significant increasing temperature over time. Crop yield trends demonstrated that maize and sorghum were significantly enhanced in both study areas of the Sudano-Guinean savannah. Southwestern Ghana depicted a different crop pattern where cassava and plantain showed a strong upward yield trend. The grouped food balance sheets across the regions illustrated a surplus for the Sudano-Guinean savannah while southwestern Ghana exhibited a deficit. Despite the growing yield of various crops, food demand is outpacing regional production.

Assessing the potential risks of climate change on the natural capital of six countries resulting from global warming of 1.5 to 4 °C above pre-industrial levels

We present the results from a new framework providing an assessment of how climate change risks to natural capital accrue with warming of 1.5–4 °C in six countries (China, Brazil, Egypt, Ethiopia, Ghana, and India). Unlike typical biodiversity and climate change studies, this assessment also considers landcover and population changes across a range of 17 ecosystem services. The potential impacts of climate change (alone) on natural capital at 1.5 °C is greatest in Brazil and least in Ghana. However, when population and landcover change are included, areas projected to be at high natural capital risk begin to accrue by 1.5 °C in all countries. By 2 °C, Ethiopia and Ghana show increasing areas at high risk, even though they are at low risk owing to climate alone. Thus, current impacts to biodiversity and ecosystem services and changes in potential demand coupled with warming exceed changes projected by climate alone. However, this also indicates that there is adaptation potential, especially with warming of < 2 °C, to reduce risk through restoring habitat. At lower levels of warming, targeted restoration of marginal agricultural habitats would increase the bank of natural capital for use by people and provide support for remaining agricultural lands. By 3 °C, the adaptation potential from restoration is substantially less: < 1% in Brazil, India and Egypt; 7–8% in China and Ethiopia; but still 26% in Ghana. This indicates that restoration as an adaptation option for biodiversity, and thus, natural capital, rapidly decreases with increasing temperatures. By 2100, factoring in population change (SSP2), current ecological footprint, and current landcover, even with only 1.5 °C warming, large parts of Brazil, eastern China, most of Egypt, much of Ethiopia, southwestern Ghana (except for protected areas), and most of India are at high to extreme natural capital risk with an adaptation deficit potentially equating to a soft adaptation limit.

Participatory and Spatially Explicit Assessment to Envision the Future of Land-Use/Land-Cover Change Scenarios on Selected Ecosystem Services in Southwestern Ghana

Settlement expansion and commercial agriculture affect landscape sustainability and ecosystem service provision. Integrated landscape approaches are promoted to negotiate trade-offs between competing land uses and their reconciliation. Incorporating local perceptions of landscape dynamics as basis for such negotiations is particularly relevant for sub-Saharan Africa, where most people depend on natural ecosystems for livelihoods and well-being. This study applied participatory scenario building and spatially explicit simulation to unravel perceptions of the potential impact of rubber and settlement expansion on the provision of selected ecosystem services in southwestern Ghana under a business-as-usual scenario. We collected data in workshops and expert surveys on locally relevant ecosystem services, their indicator values, and the probable land-use transitions. The data was translated into an assessment matrix and integrated into a spatially explicit modeling platform, allowing visualization and comparison of the impact on ecosystem service provision of land-use scenarios under rubber plantation and settlement expansion. The results show the capacity of current (2020) and future land-use patterns to provide locally relevant ecosystem services, indicating a decline in capacity of ecosystem service provisioning in the future compared to the 2020 land-use patterns, a threat to the benefits humans derive from ecosystems. This highlights urgent need for policies and measures to control the drivers of land-use/land-cover change. Furthermore, the results emphasize the importance of diversifying land-use/land-cover types for sustainable landscape development. The paper contributes new insights into how spatially explicit and semi-quantitative methods can make stakeholder perceptions of landscape dynamics explicit as a basis for implementing integrated landscape approaches.

‘Associations do not survive here’: Inequality, Mistrust and Obstacles to Collective Action in Oil Palm Growing Communities in Ghana

Collective action through farmer-based organisations (FBOs) could potentially improve the livelihoods of smallholder farmers by opening up access to credit and inputs, overcoming market constraints, and reducing transaction costs. However, in the absence of strong or well-functioning farmer associations, the cost of market participation is likely to exacerbate economic hardships and inequalities among smallholders. Based on qualitative data from five oil palm growing communities in southwestern Ghana, we observe a general decline in associational life, driven by a breakdown of trust among farmers. The inability of poorer farmers to meet their collective obligations over time has weakened attempts at collective action and encouraged the emergence of highly individualised economic relations in the local agrarian economy. Under these circumstances, cooperation tends to be limited to small groups of better-off farmers who can afford the cost of cooperation. The result is a vicious cycle in which wealth disparities widen because the cost of participating in livelihood-enhancing collective schemes ends up excluding exactly those who need such schemes the most.

Understanding groundwater mineralization controls and the implications on its quality (Southwestern Ghana): insights from hydrochemistry, multivariate statistics, and multi-linear regression models

Understanding groundwater mineralization controls and the implications on its quality (Southwestern Ghana): insights from hydrochemistry, multivariate statistics, and multi-linear regression models

Teak‐Soil Interaction: Teak (Tectona grandis) Plantations Impact and are Impacted by Soil Properties and Fertility in Southwestern Ghana

Teak (Tectona grandis) is one of the most widely established plantation species globally due to its potential for degraded forest restoration, timber supplementation, and easing pressure on natural forest resources. However, the extent to which plant‐soil interactions in teak plantations impact tree growth and productivity and soil nutrient dynamics is not well understood. This study assessed the impact of teak plantations on soil physicochemical properties as well as the influence of soil properties and fertility on teak growth. The study was conducted in teak plantations aged 5, 10, 15, 20, and over 20 years and an adjacent natural forest remnant. We established three 25 m × 25 m plots in each teak plantation and recorded the diameter at breast height (DBH), height, crown length, and depth of all trees. We collected 54 soil samples at 0–20 cm depth and analysed them for 29 soil parameters. The study revealed that teak plantations resulted in a decline in soil N (45%–81%) and available P (63%–98%) concentration, while soil pH improved by 0.41–0.64 units. However, soil organic carbon, K, Mg, Ca, and Na concentrations and their ratios were unaffected with teak plantations over time. Also, soil textural characteristics, acidity, and nutrient ratios were observed to influence tree‐related characteristics such as DBH and crown dimensions (crown, diameter, breadth, length, and volume). Three principal components (PC1, PC2, and PC3) explained 69% of the overall variability and were significantly related to tree crown parameters, height, and diameter at breast height. We concluded that site selection and tailored integrated soil fertility management for each plantation age are critical to sustainable teak production as teak plantations both affect and are affected by soil properties. The study recommends the adoption of management practices aimed at maintaining soil nutrient balance to ensure the long‐term growth and ecological sustainability of teak plantations.

The exports of dehusked coconuts from southwestern Ghana: Implications for coconut farmers’ role in a rural virgin coconut oil value chain

The export of coconuts creates competition between local value chain activities and the export market. This article examined the impact of dehusked coconut exports on the role of coconut farmers in the local virgin coconut oil (VCO) value chain in the Jomoro Municipality, Ghana. The study answered the following question: What were the quantities of coconut farmers supplied to local VCO processors before and during the export periods? Simple random sampling was used to select 311 coconut farmers for the study. Both structured and unstructured interviews were conducted using an interview schedule and a semi-structured interview guide, respectively. Quantitative data were analysed using IBM SPSS (version 25), while direct quotes were used to support the quantitative data. The results show that the presence of coconut exporters and the rising price of coconuts were major opportunities for coconut farmers. Exporters bought 100 dry coconuts at GHȻ100 while the local VCO processors bought the same quantity at GHȻ60. The international market prices for dry (mature) coconuts ranged from €14 to €15 (GH₵98 to GH₵105) per bag of 50 units. The majority of the coconut farmers, therefore, supplied 70–100% of their coconuts to exporters and 10–30% to local VCO processors. Thus, the exports of coconuts, mainly to Nigeria, Europe and the United States of America, have impacted farmers’ roles in the local VCO value chain. The government should partner with local companies to build more processing plants that will offer attractive prices to farmers in order to keep coconuts in the Jomoro Municipality for processing.

What’s in a Refusal? Methodological and Ethical Notes from an Ethnography of Mental Health Care in Rural Ghana

Drawing on fifteen months of ethnographic fieldwork conducted between 2013 and 2022 on experiences of madness and practices of mental health care in rural southwestern Ghana, in this paper I propose to take as a point of departure, a specific episode in which the relatives of Fadhila—a girl I had first met at the psychiatric unit, where she was diagnosed as “psychotic”—refused to give consent to record an interview with me. The refusal was motivated by the strict instructions that Fadhila and her family were given by the traditional healer who was taking care of her: among many other things, the girl was not allowed to come close to any electronic device and her family felt it was unsafe to record an interview at their house. The refusal had to do with Fadhila being a “patient” as much as it had to do with another refusal: that of drugs and psychiatrisation. Indeed, the refusal had to do with spirits, the spirits that occasionally possessed Fadhila and were trying to make her a healer, according to her, her family members, and the traditional specialists they had visited. The refusal, however, may also have been a polite, indirect way to “withdraw consent”—to use the jargon of informed consent forms and ethics review committees. Though Fadhila and her family kept inviting me to their place, welcomed me warmly in subsequent occasions, and conversed with me about many things including the girl’s “condition,” that episode pushed me to reconsider the limits of formal consent and the need to constantly question it and re-establish it—a complex dynamic that sometimes the bureaucracy of “ethical clearance” processes in academia may contribute, paradoxically, to erase. Analysing this ethnographic episode in light of the powerful concept of ethnographic refusal introduced by Audra Simpson, I propose a reflection on the ethical and methodological implications of considering people as “sources” in ethnographies of madness and mental health.

Heterogeneous market participation channels and household welfare

ABSTRACT This paper uses panel data and qualitative interviews from southwestern Ghana to analyse farmers’ heterogeneous oil palm marketing decisions and the effect on household welfare. We show that despite the supposed benefits that smallholders could derive from participation in global agribusiness value chains via formal contracts, such arrangements are rare although two of Ghana’s ‘big four’ industrial oil palm companies are located in the study area. In the absence of formal contracts, farmers self-select into four main oil palm marketing channels (OPMCs). These OPMCs are associated with varying levels of welfare, with processing households and those connected to industrial companies by verbal contracts being better off. Furthermore, own-processing of palm fruits is shown to reduce gender gaps in household welfare. We also unearth community and household level factors that hamper or facilitate participation in remunerative OPMCs. These results have implications for development policy and practice related to inclusive agricultural commercialization.

Ethnobotanical and ethnopharmacological survey of medicinal tree species used in the treatment of diseases by forest-fringe communities of Southwestern Ghana

Demand for medicinal plant remedies is rising globally, while indigenous knowledge about medicinal plants is declining rapidly. The preservation of indigenous knowledge is critical in discovering and developing innovative drugs. The ongoing discussions on providing nature-based solutions to contemporary issues make it urgent to document indigenous knowledge about medicinal trees, especially in areas with limited or no studies such as our study area. Our study aimed to understand the use of medicinal trees among the communities fringing the Asukese and Amama Shelterbelt Forest Reserves. We administered structured questionnaires and interviewed 88 respondents who were selected using snowball and simple random techniques. The ethnobotanical survey data were processed and evaluated using parameters such as Indigenous Knowledge Index (IKI), Relative Citation Frequency (RCF), Species Use Value (SUV), Family Use Value (FUV), and Plant Part Value (PPV). We found that ethnobotanical knowledge about medicinal trees was higher in respondents who were widowed or had larger number of dependants. We found that the local communities used diverse medicinal trees (70 species belonging to 33 families) to treat 83 ailments. Azadirachta indica had the highest RCF (8.9) and SUV (23.4). The other top four species according to the SUV were Alstonia boonei (SUV = 11.1), Khaya senegalensis (SUV = 10.7), Moringa oleifera (SUV = 10.3) and Cocos nucifera (SUV = 10.2). The most-well represented and valuable families were Fabaceae, Anacardiaceae, Meliaceae, Arecaceae, Rubiaceae and Malvaceae. Medicinal trees had alternative uses such as food, fodder, fuelwood, and construction material. Indigenous knowledge about medicinal trees was transmitted to younger generations predominantly by parents. The results show that the most known botanical families and species with the most useful parts were the most useful plant families and species. Thus, the selection of medicinal trees was driven by their traits. Furthermore, results indicate that species diversity is critical to the healthcare needs of local communities and that their conservation and sustainable use and the preservation of indigenous knowledge are crucial to ensuring good health and the general well-being of local communities of all ages.

Assessing the impact of artisanal gold mining on the environmental sustainability of groundwater resource for water security in southwestern Ghana

The increase in illegal gold mining (galamsey) activities that harm the environment by polluting water sources necessitates the need to take meaningful steps towards protecting the environment.The Jacobu water system in the Amansie Central district was selected as a case study. The purpose of the work is to assess the environmental sustainability of groundwater resource and whether surface water pollution has seeped into the water table to pollute groundwater resource. Methodologically, the study employed groundwater sustainability assessment framework, involving both linear and non-linear sustainability index functions, as well as analytical hierarchy process (AHP). Four groundwater sustainability aspects of quantity, quality, ecosystem and management were assessed. Also, thirteen groundwater sustainability indicators were created for the study. Using the linear sustainability index function, the environmental sustainability index was 0.845, which indicates an excellent level. For the assessment to properly reflect the reality in the study area, the combined linear and non-linear sustainability index function revealed a good level, 0.765, showing an environmentally good overview of Jacobu groundwater resource. This, therefore, suggests the need to ensure continuous protection of groundwater resource. Generally, the study area has not yet experience hydromorphic dispersion of polluted surface water into groundwater resources. For a sustainable groundwater in the future, strict control measures by enforcing environmental laws and regulations to prevent possible pollution of groundwater resource due to ‘‘galamsey’’ activities is critical to protect the invisible resource. This can be done through community engagement, and innovative approaches to monitoring and controlling illegal mining activities. This is to help sustain future generation's security of the ‘invisible’ groundwater resource in Ghana and contributes to Goal 6 (Ensuring Access to Clean Water and Sanitation) of the Sustainable Development Goals set by the United Nations.

Conservation and economic benefits of medicinal plants: Insights from forest-fringe communities of Southwestern Ghana

Medicinal plants have significant socioeconomic and health benefits, especially in developing countries with high poverty rates and limited health care coverage. However, the continuous utilization of medicinal plants without conservation efforts leads to species scarcity, especially for endangered species. This study, therefore, assessed the economic benefits and conservation status of medicinal plants in the Asukese and Amama Forest Reserves in Ghana. Field visits, structured and semi-structured questionnaires were used to survey 172 respondents focusing on their socio-demographic characteristics, medicinal plants used to treat diseases in the communities and plant parts used, preparation and administration of remedies, availability trend of medicinal plants, drivers of loss of medicinal plants, contribution of medicinal plants to gross incomes and conservation strategies. The study identified 143 plant species used to treat 135 ailments and diseases. The mostly highly cited plant family was Fabaceae (15 spp.). On average, medicinal plants contributed 64 % of gross annual income. Income from medicinal plants varied significantly across marital status and primary occupation but was similar across gender, religion, and educational levels. Thirty-three (33) of these plants were perceived to be threatened by over-harvesting, agricultural expansion, mining, logging, and climate change. Consequently, the cultivation of medicinal plants on farms, creation of medicinal plants nurseries, integration of medicinal plants in home gardens, creation of botanic gardens, and indigenous knowledge systems and practices were suggested as strategies for their conservation and sustainability utilization. There is therefore the need for increased conservation efforts to protect medicinal plant species from anthropogenic disturbance and the imminent threat of climate change. This will be critical for biodiversity conservation and sustainable economic development in local communities.

Potential toxic elements accumulation in soils and parts of palm (Elaeis guineensis) growing on reclaimed tailings and mined spoils in southwestern Ghana

Potential toxic elements accumulation in soils and parts of palm (Elaeis guineensis) growing on reclaimed tailings and mined spoils in southwestern Ghana

Ecological and human health risk assessment of potentially toxic elements in water and soils within a crude oil waste management facility, Southwestern Ghana.

Crude oil waste management is challenging due to the diverse constituents of the waste and its consequent impact on valued environmental receptors (water and soil). Characterization of the potentially toxic elements (PTEs) in soils and water within the surroundings of crude oil waste management facility is imperative, to aid evaluation of potential risks. The study assessed the potential environmental and human health risks posed by PTEs in soil and water from surroundings and adjoining settlement communities. A total of forty-four (44) samples were analyzed for PTEs (Cr, Pb, Zn, Co, Mn, Ni, Hg, Fe, As, Cu, Hg, and Cd) and physicochemical properties in both matrices. The total carcinogenic risk (TCR) for adults and children in the neighbouring community was 4.73 × 10-6 and 1.2 × 10-4, respectively, which was due to the high carcinogenic slope factor of arsenic. A strong correlation was observed between the PTEs and physicochemical properties, and their health risk was attributed to both geogenic and anthropogenic factors. The study indicated that the human health and ecological risk values obtained were within acceptable limits, with the waste management facility posing a higher risk in comparison to the nearby community. These risks may be attributed to the specific nature and intensity of the activities conducted at the facility. Hence, there is the need for continuous promotion of occupational and public awareness on the health and environmental impact of crude oil waste management.

Climate variability and mining sustainability: exploring operations’ perspectives on local effects and the willingness to adapt in Ghana

The mining industry is susceptible to the effects of local climatic changes just as the surrounding socioecological systems are exposed to both mining and changing climate impacts. Adaptation deficit in mining is a worldwide problem but given the double exposure of surrounding systems, which has emergent outcomes on the industry, operations must adapt to coexist with surrounding rural communities. To understand this susceptibility, the study employed mixed methods to assess the implications of local climatic changes on mining sustainability as perceived among Ghanaian operations through the lens of the corporate adaptation process framework. The results indicate that operational workers are aware of increasing variability in the climatic patterns across southwestern Ghana, citing changes in the start/end of the rain season, torrential rain, prolonged dry season, and a general increase in temperature. The effects of these changing patterns, which affect mining activities, are diverse, including mine water management, safety, and occupational health issues as well as production planning opportunities. Workers ranked high the need to involve stakeholders such as the state-appointed regulators and Ghana Chamber of Mines as key strategies to enjoin adaptation to changing climate at operational sites. In addition, workers perceived the impact on regulatory and economic sustainability performances as major factors determining the industry’s perception and willingness to adapt. The study highlights pertinent issues useful for informed policy decision-making in the strive towards attaining sustainable development goals, especially Goal 13, which calls for active collaboration between business and society.

Spatial distribution of Hg in Pra River Basin, Southwestern Ghana using HF acid combination method

The study assessed the spatial distribution of total mercury (THg) in soils, sediments, mining wastes, and Au-rich Hg-contaminated tailings from artisanal and small-scale gold mining (ASGM) from Offin, Lower and Upper Pra, Birim, and Anum Rivers, Pra River Basin, Southwestern Ghana. THg measurement using Cold Vapor Atomic Absorption Spectrometry (CVAAS) after acid digestion with HNO3/HCl/HF and k0-INAA, as a reference method, and both provided comparable results. A digestion method, HNO3/HClO2/H2SO4 acid mixture before CVAAS provided lower results, which indicates that the use of HF is of fundamental importance in THg analysis based on acid digestion and its omission may significantly underestimate the presence of Hg in soils and sediments. THg in soils, sediments, Au-rich Hg-contaminated tailings, and mining wastes from the river basin were liberated into a solution for measurement using HNO3/HCl/HF. The study revealed Offin and Lower Pra Rivers showed high distribution (ranges; mg Hg kg-1) of THg in soils (103-770) and sediments (0.20-20.8), respectively; Upper Pra and Anum rivers showed the lowest THg in soils (2.20-3.20) and sediments (0.004-0.02), respectively. About 76.0% of THg in sediments was lower than the USEPA guideline of 0.2mg Hg kg-1. The highest mean THg (mg Hg kg-1) in Au-rich Hg-contaminated tailings (1673 ± 4.8, n = 4) and mining wastes (17.3-21.5) were from the river Offin. The study showed Offin (Dunkwa-on-Offin site 1) and Lower Pra (Beposo Township) rivers are Hg hotspots that need attention.