Inmagic DB/Text WebPublisher PRO: 4 records

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1 Keraita, Bernard; Drechsel, Pay; Agyekum, W.; Hope, Lesley. 2007. In search of safer irrigation water for urban vegetable farming in Ghana. Urban Agriculture Magazine, 19: 17-19.

Wastewater irrigation ; Vegetables ; Groundwater ; Farm ponds ; Wells ; Water quality / Ghana / Accra / Kumasi / Tamale

(Location: IWMI HQ Call no: P 7989 Record No: H040811)

http://www.ruaf.org/sites/default/files/UAmagazine%2019%20H6.pdf
https://vlibrary.iwmi.org/pdf/H040811.pdf

2 Abaidoo, R. C.; Keraita, Bernard; Amoah, Philip; Drechsel, Pay; Bakang, J.; Kranjac-Berisavljevic, G; Konradsen, F.; Agyekum, W.; Klutse, A. 2009. Safeguarding public health concerns, livelihoods and productivity in wastewater irrigated urban and periurban vegetable farming. Colombo, Sri Lanka: CGIAR Challenge Program on Water and Food (CPWF). 80p. (CPWF Project Report 38)

Vegetable growing ; Urban areas ; Wastewater irrigation ; Productivity ; Models ; Public health ; Research projects / Ghana / Accra / Kumasi / Tamale

(Location: IWMI HQ Call no: e-copy only Record No: H044042)

http://www.dfid.gov.uk/r4d/PDF/Outputs/WaterfoodCP/PN38_KNUST_ProjectReport_Nov09_approved.pdf
https://vlibrary.iwmi.org/pdf/H044042.pdf

(3.01 MB)

The goal of the project was to develop integrated and user-oriented strategies to safeguard public health concerns without compromising livelihoods and land and water productivity in wastewater irrigated urban and peri-urban vegetable farming. In this project, assessment of land and water productivity in wastewater irrigated farming was done, levels of contamination on irrigation water and vegetables quantified at different levels along the food chain (farms, markets and consumer level) and appropriate lowcost risk reduction strategies identified and participatory testing done with stakeholders at farm and consumer levels. A large number of students were involved in the project, significantly building human capacity.

3 Obuobie, E.; Barry, B.; Agyekum, W.. 2016. Groundwater resources of the Volta Basin. In Williams, Timothy O.; Mul, Marloes L.; Biney, C. A.; Smakhtin, Vladimir (Eds.). The Volta River Basin: water for food, economic growth and environment. Oxon, UK: Routledge - Earthscan. pp.46-61.

Groundwater extraction ; Groundwater recharge ; Groundwater irrigation ; Surface water ; Water quality ; Drinking water ; Domestic water ; Water supply ; Water availability ; Water use ; Irrigated farming ; Aquifers / West Africa / Benin / Burkina Faso / Ivory Coast / Ghana / Mali / Togo / Volta River Basin

(Location: IWMI HQ Call no: IWMI Record No: H047724)

4 Cuthbert, M. O.; Taylor, R. G.; Favreau, G.; Todd, M. C.; Shamsudduha, M.; Villholth, Karen G.; MacDonald, A. M.; Scanlon, B. R.; Kotchoni, D. O. V.; Vouillamoz, J.-M.; Lawson, F. M. A.; Adjomayi, P. A.; Kashaigili, J.; Seddon, D.; Sorensen, J. P. R.; Ebrahim, Girma Yimer; Owor, M.; Nyenje, P. M.; Nazoumou, Y.; Goni, I.; Ousmane, B. I.; Sibanda, T.; Ascott, M. J.; Macdonald, D. M. J.; Agyekum, W.; Koussoube, Y.; Wanke, H.; Kim, H.; Wada, Y.; Lo, M.-H.; Oki, T.; Kukuric, N. 2019. Observed controls on resilience of groundwater to climate variability in sub-Saharan Africa. Nature, 572(7768):230-234. [doi: https://doi.org/10.1038/s41586-019-1441-7]

Groundwater recharge ; Climate change ; Resilience ; Groundwater table ; Observation ; Precipitation ; Hydrology ; Hydrography ; Models ; Arid zones ; Rain / Africa South of Sahara / Benin / Uganda / United Republic of Tanzania / Zimbabwe / South Africa / Namibia / Niger / Ghana / Burkina Faso

(Location: IWMI HQ Call no: e-copy only Record No: H049316)

https://www.nature.com/articles/s41586-019-1441-7.epdf?author_access_token=UgizrPwmrGzlbL33bjbvQdRgN0jAjWel9jnR3ZoTv0M3C122Ih9FQbr0PbeOlDAX9EZlbSwXsaUcJ-Vq-8EelgPfWJQTdVE-2_3g7yypNR4C-qTOMe7Ux1weufjBdaT9SyaKgJjfKYgJ2fqsjIRLng%3D%3D
https://vlibrary.iwmi.org/pdf/H049316.pdf

(7.21 MB)

Groundwater in sub-Saharan Africa supports livelihoods and poverty alleviation1,2 , maintains vital ecosystems, and strongly influences terrestrial water and energy budgets3 . Yet the hydrological processes that govern groundwater recharge and sustainability—and their sensitivity to climatic variability—are poorly constrained4,5 . Given the absence of firm observational constraints, it remains to be seen whether model-based projections of decreased water resources in dry parts of the region4 are justified. Here we show, through analysis of multidecadal groundwater hydrographs across sub-Saharan Africa, that levels of aridity dictate the predominant recharge processes, whereas local hydrogeology influences the type and sensitivity of precipitation–recharge relationships. Recharge in some humid locations varies by as little as five per cent (by coefficient of variation) across a wide range of annual precipitation values. Other regions, by contrast, show roughly linear precipitation–recharge relationships, with precipitation thresholds (of roughly ten millimetres or less per day) governing the initiation of recharge. These thresholds tend to rise as aridity increases, and recharge in drylands is more episodic and increasingly dominated by focused recharge through losses from ephemeral overland flows. Extreme annual recharge is commonly associated with intense rainfall and flooding events, themselves often driven by large-scale climate controls. Intense precipitation, even during years of lower overall precipitation, produces some of the largest years of recharge in some dry subtropical locations. Our results therefore challenge the ‘high certainty’ consensus regarding decreasing water resources4 in such regions of sub-Saharan Africa. The potential resilience of groundwater to climate variability in many areas that is revealed by these precipitation–recharge relationships is essential for informing reliable predictions of climate-change impacts and adaptation strategies.