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1 Mul, Marloes; Obuobie, E.; Appoh, Richard; Kankam-Yeboah, K.; Bekoe-Obeng, E.; Amisigo, B.; Logah, F. Y.; Ghansah, Benjamin; McCartney, Matthew. 2015. Water resources assessment of the Volta River Basin. Colombo, Sri Lanka: International Water Management Institute (IWMI) 78p. (IWMI Working Paper 166) [doi: https://doi.org/10.5337/2015.220]

Water resources ; Environmental impact assessment ; River basins ; International waters ; Water management ; Water governance ; Water quality ; Water use ; Water demand ; Water power ; Water availability ; Ecosystem services ; Natural resources ; Infrastructure ; Wetlands ; Lakes ; Dams ; Policy making ; Strategies ; Livestock ; Fishing ; Industry ; Geology ; Soils ; Sedimentation ; Land use ; Hydrology ; Energy generation ; Riparian zones ; Institutions ; Economic aspects / Ghana / Burkina Faso / Volta River Basin

(Location: IWMI HQ Call no: IWMI Record No: H047413)

http://www.iwmi.cgiar.org/Publications/Working_Papers/working/wor166.pdf

(2 MB)

The ‘WISE-UP to climate’ project aims to demonstrate the value of natural infrastructure as a ‘nature-based solution’ for climate change adaptation and sustainable development. Within the Volta River Basin, both natural and built infrastructure provide livelihood benefits for people. Understanding the interrelationships between the two types of infrastructure is a prerequisite for sustainable water resources development and management. This is particularly true as pressures on water resources intensify and the impacts of climate change increase. This report provides an overview of the biophysical characteristics, ecosystem services and links to livelihoods within the basin.

2 Mul, Marloes; Obuobie, E.; Appoh, Richard; Kankam-Yeboah, K.; Bekoe-Obeng, E.; Amisigo, B.; Logah, F. Y.; Ghansah, Benjamin; McCartney, Matthew. 2015. Evaluation des ressources en eau du bassin de la Volta. In French. [Water resources assessment of the Volta River Basin]. Colombo, Sri Lanka: International Water Management Institute (IWMI) 84p. (Also in English) (IWMI Working Paper 166/Document de travail IWMI 166) [doi: https://doi.org/10.5337/2016.201]

(Location: IWMI HQ Call no: IWMI Record No: H047580)

http://www.iwmi.cgiar.org/Publications/Working_Papers/working/wor166-french.pdf

(24 KB)

Le projet « WISE UP to climate » vise a demontrer l'utilite des infrastructures naturelles comme une « solution basee sur la nature » pour l'adaptation au changement climatique et le developpement durable. Dans le bassin de la Volta, les infrastructures naturelles, comme les construites, offrent des benefices pour la subsistance des personnes. Comprendre les interrelations entre ces deux types d'infrastructures est une condition indispensable a une gestion et un developpement durables des ressources en eau. Cela est particulierement vrai dans un contexte ou les pressions sur les ressources en eau s'intensifient, et ou les impacts du changement climatique augmentent. Ce rapport donne un apercu des caracteristiques biophysiques, des services ecosystemiques, et de leur relation avec les moyens de subsistance dans le bassin.

3 Bekoe, E. O.; Andah, W.; Logah, F. Y.; Balana, Bedru B. 2016. Water-food-energy nexus and hydropower development. 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.161-178.

Energy generation ; Energy demand ; Water power ; Water resources ; Water supply ; Water demand ; Water use ; Domestic water ; Food security ; Industrial uses ; River basins ; Renewable energy ; Dams ; Social impact ; Environmental impact ; Environmental flows ; Climate change ; Emission ; International waters / West Africa / Benin / Burkina Faso / Ivory Coast / Ghana / Mali / Togo / Volta River Basin

(Location: IWMI HQ Call no: IWMI Record No: H047731)

4 Logah, F. Y.; Amisigo, A. B.; Obuobie, E.; Kankam-Yeboah, K. 2017. Floodplain hydrodynamic modelling of the lower Volta River in Ghana. Journal of Hydrology: Regional Studies, 14:1-9. [doi: https://doi.org/10.1016/j.ejrh.2017.09.002]

Floodplains ; Hydrodynamics ; Models ; Rivers ; Stream flow ; Sediment ; Geomorphology ; Dams ; Downstream ; Communities ; Living standards / Ghana / Lower Volta River / Akosombo Dam / Kpong Dam

(Location: IWMI HQ Call no: e-copy only Record No: H048495)

https://www.sciencedirect.com/science/article/pii/S2214581817301635/pdfft?md5=8175e1742b62ee768daad95eae85209a&pid=1-s2.0-S2214581817301635-main.pdf
https://vlibrary.iwmi.org/pdf/H048495.pdf

(1.16 MB) (1.16 MB)

The impacts of dam releases from re-operation scenarios of the Akosombo and Kpong hydropower facilities on downstream communities along the Lower Volta River were examined through hydrodynamic modelling using the HEC-RAS hydraulic model. The model was used to simulate surface water elevation along the river reach for specified discharge hydrographs from proposed re-operation dam release scenarios. The morphology of the river and its flood plains together with cross-sectional profiles at selected river sections were mapped and used in the hydrodynamic modelling. In addition, both suspended and bed-load sediment were sampled and analysed to determine the current sediment load of the river and its potential to carry more sediment. The modelling results indicate that large areas downstream of the dam including its flood plains would be inundated if dam releases came close to or exceeded 2300 m3 /s. It is therefore recommended to relocate communities along the banks and in the flood plains of the Lower Volta River when dam releases are to exceed 2300 m3 /s. Suspended sediment transport was found to be very low in the Lower Volta River and the predominant soil type in the river banks and bed is sandy soil. Thus, the geomorphology of the river can be expected to change considerably with time, particularly for sustained high releases from the Akosombo and Kpong dams. The results obtained from this study form a basis for assessing future sedimentation problems in the Lower Volta River and for underpinning the development of sediment control and management strategies for river basins in Ghana.