Changes in water quality in the Owabi water treatment plant in Ghana

Akoto, Osei; Gyamfi, Opoku; Darko, Godfred; Barnes, Victor Rex

doi:10.1007/s13201-014-0232-4

Cited by 19 publications

(13 citation statements)

References 33 publications

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“…This section examines the effects of land use changes resulting from the construction of the Owabi reservoir on people's livelihoods and the overall natural environment. The reservoir presents both constraints and opportunities for the local population around the outlying towns [33][34][35], and it has either improved or worsened the living conditions of the community dwellers. There was consensus among the focus group participants that the presence of the reservoir has negatively affected the livelihoods of the local communities as illustrated by the following characteristic remark:…”

Section: Effects Of the Owabi Reservoir On The Livelihoods Within Thementioning

confidence: 99%

Land Use and Land Cover Changes in the Owabi Reservoir Catchment, Ghana: Implications for Livelihoods and Management

et al. 2019

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Reservoir catchments in Ghana have undergone significant changes in recent years with major implications for socio-economic development and local livelihoods. We studied land use and land cover changes and their impacts on livelihoods in the Owabi reservoir catchment from 1970 to 2014 using Landsat, ERDAS Imagine and Arc Geographic Information System (ArcGIS 10.2) software supplemented with participatory approaches including focus group discussions, key informant interviews and questionnaire surveys with 400 households. Our results showed that, since 1970, 24.6% of high-density forests and 15.8% of sparse forests have disappeared, while the built-up area has increased from 9.8% to 56.6%. Additionally, the proportion of bare soil (areas that do not have vegetation cover due to forest clearing and other anthropogenic activities) has increased, while the areas of waterbodies have declined. We identified urbanisation and lack of community involvement in catchment management as the key factors driving the land cover changes that have adversely affected the livelihoods of the local fringe communities. This study highlights the threats from urbanisation to land cover changes and identifies the key drivers of land use change. For effective and sustainable management of natural resources, the local communities should be more actively involved in the decision-making process regarding the management of their individual catchments.

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Section: Effects Of the Owabi Reservoir On The Livelihoods Within Thementioning

confidence: 99%

Land Use and Land Cover Changes in the Owabi Reservoir Catchment, Ghana: Implications for Livelihoods and Management

et al. 2019

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“…Water bodies are essential for all life forms and are also used as drains for human activities (Blume et al, 2010;Akoto et al, 2017). Contamination from domestic, industrial and hospital sewage can decrease water quality and compromise aquatic ecosystems, especially those used for public water supplies and recreation (Bueno-Krawczyk et al, 2015;Rodriguez-Mozaz et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Physicochemical quality of and Escherichia coli resistance profiles in urban surface waters

et al. 2020

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Aquatic ecosystems of urban rivers are contaminated through waste disposal, which poses a public health problem. The objective of this research was to evaluate the quality of water used for recreation and public supply of six rivers in the city of Cascavel - Paraná, including Cascavel, Quati, Bezerra, Antas, Clarito and Amambay. Samples were collected every 4 months in 2017, and their physicochemical and microbiological parameters, as well as resistance profiles of strains of Escherichia coli to antimicrobials distributed by pharmacies of the primary healthcare network, were evaluated. Parameters such as water temperature, turbidity, total nitrogen, total phosphorus, total coliforms and thermotolerant coliforms showed significant differences. The allowed limit for thermotolerant coliforms, which was set by National Environment Council, Resolution 357/2005, was exceeded in all of the six analyzed rivers. It was determined that 48.1% of E. coli strains showed resistance to nine antimicrobial tested. The highest levels of resistance were found for ampicillin (27.7%), tetracycline (27.7%) and amoxicillin (24.0%). The results of this study contribute to the understanding of the hazards associated with the contamination of springs in urban centers with wastewater containing resistant bacteria. Therefore, recovery work is necessary in these areas because of the importance of these water sources for the entire western region of Paraná state.

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“…It was constructed in 1928 and upgraded in 1954. The reservoir has a surface area about 3.5 km 2 and a mean depth 7 m (Akoto et al, 2014). The Owabi Reservoir is fed by seven rivers/streams, all of which flow through the densely populated Kumasi Metropolitan Area and the central business and industrial areas.…”

Section: Study Areamentioning

confidence: 99%

“…The Owabi and Barekese Reservoirs are both situated in the Ashanti Region of Ghana and serving as major water supplies to Kumasi Metropolitan Area with a population over 2 mil people. The Owabi reservoir is designed to produce up to 20% of the total potable water requirement (Akoto et al, 2014), while the Barekese treatment plant is providing about 80% of the total piped drinking water to the Kumasi metropolis (Kumasi et al, 2011). The Kpong Reservoir, described as mesotrophic (Addico et al, 2009), is located in the Eastern Region of Ghana on 6°07′ 1.3″ N 0°07′ 31.6″ E (Fig.…”

Section: Study Areamentioning

confidence: 99%

Cyanobacteria and microcystin contamination in untreated and treated drinking water in Ghana

Addico¹,

Hardege²,

Kohoutek³

et al. 2017

Adv Ocean Limnol

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Although cyanobacterial blooms and cyanotoxins represent a worldwide-occurring phenomenon, there are large differences among different countries in cyanotoxin-related human health risk assessment, management practices and policies. While national standards, guideline values and detailed regulatory frameworks for effective management of cyanotoxin risks have been implemented in many industrialized countries, the extent of cyanobacteria occurrence and cyanotoxin contamination in certain geographical regions is underreported and not very well understood. Such regions include major parts of tropical West and Central Africa, a region constisting of more than 25 countries occupying an area of 12 million km 2 , with a total population of 500 milion people. Only few studies focusing on cyanotoxin occurrence in this region have been published so far, and reports dealing specifically with cyanotoxin contamination in drinking water are extremely scarce. In this study, we report seasonal data on cyanobacteria and microcystin (MC) contamination in drinking water reservoirs and adjacent treatment plants located in Ghana, West Africa. During January-June 2005, concentrations of MCs were monitored in four treatment plants supplying drinking water to major metropolitan areas in Ghana: the treatment plants Barekese and Owabi, which serve Kumasi Metropolitan Area, and the plants Kpong and Weija, providing water for Accra-Tema Metropolitan Area. HPLC analyses showed that 65% samples of raw water at the intake of the treatment plants contained intracellular MCs (maximal detected concentration was 8.73 µg L -1 ), whereas dissolved toxins were detected in 33% of the samples. Significant reduction of cyanobacterial cell counts and MC concentrations was achieved during the entire monitoring period by the applied conventional water treatment methods (alum flocculation, sedimentation, rapid sand filtration and chlorination), and MC concentration in the final treated water never exceeded 1 µg L -1 (WHO guideline limit for MC-LR in drinking water). However, cyanobacterial cells (93-3,055 cell mL -1 ) were frequently found in the final treated water and intracellular MCs were detected in 17% of the samples (maximal concentration 0.61 µg L -1 ), while dissolved MCs were present in 14% of the final treated water samples (maximal concentration 0.81 µg L -1 ). It indicates a borderline efficiency of the water treatment, thus MC concentrations in drinking water might exceed the WHO guideline limit if the treatment efficiency gets compromised. In addition, MC concentrations found in the raw water might represent significant human health risks for people living in areas with only a limited access to the treated or underground drinking water.

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Changes in water quality in the Owabi water treatment plant in Ghana

Cited by 19 publications

References 33 publications

Land Use and Land Cover Changes in the Owabi Reservoir Catchment, Ghana: Implications for Livelihoods and Management

Land Use and Land Cover Changes in the Owabi Reservoir Catchment, Ghana: Implications for Livelihoods and Management

Physicochemical quality of and Escherichia coli resistance profiles in urban surface waters

Cyanobacteria and microcystin contamination in untreated and treated drinking water in Ghana

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