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Material flow analysis was applied to model different scenarios which help better identify and quantify water supply and wastewater pollution problems in the city of Kumasi, Ghana. Results show that despite a relative abundance of water resources in the surrounding area of the city, drinking wate...


Erni, M.Bader, H.P.Drechsel, PayScheidegger, R.Zurbrugg, C.Kipfer, R.[Urban water and nutrient flows in Kumasi, Ghana]Urban water and nutrient flows in Kumasi, Ghana

Where freshwater resources are scarce for reasons of climate or water pollution, urban wastewater is often used to irrigate a range of crops in support of urban markets as well as the livelihoods of farmers. As in many developing countries wastewater treatment is insufficient, the water can conta...


Qadir, ManzoorDrechsel, Pay[Managing salts while irrigating with wastewater]Managing salts while irrigating with wastewater

Where rapid urbanization is outpacing urban capacities to provide sound sanitation and wastewater treatment, most water sources in city vicinity are heavily polluted. This is of great concern as many of the leafy vegetables eaten raw in the cities are produced in these areas. Following the new WH...


Drechsel, PayKeraita, Bernard N.Amoah, PhilipAbaidoo, R.C.Raschid-Sally, LiqaBahri, Akissa[Reducing health risks from wastewater use in urban and peri-urban Sub-Saharan Africa: applying the 2006 WHO guidelines]Reducing health risks from wastewater use in urban and peri-urban Sub-Saharan Africa: applying the 2006 WHO guidelines
Cofie, Olufunke O.Kranjac-Berisavljevic, GordanaDrechsel, Pay[The use of human waste for peri-urban agriculture in Northern Ghana]The use of human waste for peri-urban agriculture in Northern Ghana
Pradhan, Surendra K.Opuni, S. C.Fosu, M.Drechsel, Pay[Municipal organic waste management: challenges and opportunities in Tamale, Ghana. [Abstract only].]Municipal organic waste management: challenges and opportunities in Tamale, Ghana. [Abstract only].

Urban agriculture can have many different expressions, varying from backyard gardening to poultry and livestock farming. This article focuses on crop production on larger open spaces in cities of Sub-Saharan Africa (SSA) and investigates the sustainability and dynamics of this type of land use, w...


Drechsel, PayDongus, S.[Dynamics and sustainability of urban agriculture: examples from Sub-Saharan Africa]Dynamics and sustainability of urban agriculture: examples from Sub-Saharan Africa

Most irrigation water used in urban vegetable farming in Ghana is contaminated with untreated wastewater. This poses health risks to farmers and consumers. As part of a study to explore options for health risk reduction, this paper summarizes farmers' perceptions on health risks and possible risk...


Keraita, Bernard N.Drechsel, PayKonradsen, Flemming[Perceptions of farmers on health risks and risk reduction measures in wastewater-irrigated urban vegetable farming in Ghana]Perceptions of farmers on health risks and risk reduction measures in wastewater-irrigated urban vegetable farming in Ghana

This paper presents an assessment of the potential of using on-farm ponds to reduce levels of microbial contamination in wastewater -contaminated irrigation water. The study involved observations on the use of ponds in urban agriculture in Kumasi, Ghana, and more than 300 irrigation water samples...


Keraita, Bernard N.Drechsel, PayKonradsen, Flemming[Using on-farm sedimentation ponds to improve microbial quality of irrigation water in urban vegetable farming in Ghana]Using on-farm sedimentation ponds to improve microbial quality of irrigation water in urban vegetable farming in Ghana
Drechsel, PayZimmermann, Uta[Factors influencing the intensification of farming systems and soil-nutrient management in the rural-urban continuum of SW Ghana]Factors influencing the intensification of farming systems and soil-nutrient management in the rural-urban continuum of SW Ghana

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