Your search found 15 records
1 Andreini, M.; van de Giesen, N.; van Edig, A.; Fosu, M.; Andah, W. 2000. Volta Basin water balance. Bonn, Germany: Center for Development Research. 29p. (ZEF Discussion Papers on Development Policy 21)
River basin management ; Hydrology ; Dams ; Reservoirs ; Water balance ; Rainfall runoff relationships ; Models / Africa / Volta River Basin / Akosombo Dam
(Location: IWMI HQ Call no: 333.9162 G100 AND Record No: H041339)
http://www.zef.de/fileadmin/webfiles/downloads/zef_dp/zef-dp21-00.pdf
https://vlibrary.iwmi.org/pdf/H041339.pdf
https://vlibrary.iwmi.org/pdf/H041339.pdf
Water balances pertaining to the flux of water through the Volta River Basin and a Black box model of the rainfall/runoff relationship for estimating the river flows into the Akosombo Reservoir are presented. As the water demand has approached supply, the tradeoffs between competing water uses are likely to intensify. It is also apparent from the balances that land use and land cover changes in the uplands of the basin are destined to play a pivotal role in determining the future of the basin.
2 National Dialogue on Dams and Development in Ghana. 2007. First Ghana Dams Forum, "Using dams for development: institutionalising the multi-stakeholder process in Ghana," Accra, Ghana, 4 September 2007. Accra, Ghana: National Dialogue on Dams and Development in Ghana; Accra, Ghana: International Water Management Institute (IWMI) 41p.
Dams ; Development projects ; Environmental effects ; Social participation ; Living conditions ; Resettlement ; Compensation / Ghana / Volta Hydropower Project / Akosombo Dam / Kpong Dam / Bui Dam
(Location: IWMI HQ Record No: H041908)
(3.24 MB)
3 Raschid-Sally, Liqa; Akoto-Danso, Edmund Kyei; Kalitsi, E. A. K.; Ofori, B. D.; Twum-Korangteng, R. 2008. The resettlement experience of Ghana analyzed via case studies of the Akosombo and Kpong dams. Paper presented at the 9th Annual Symposium on Poverty Research in Sri Lanka, Exploring Experiences of Resettlement, November 2008. 24p.
Dams ; Development projects ; Resettlement ; Case studies ; Hydroelectric schemes ; Irrigation programs / Ghana / Akosombo dam / Kpong dam / Bui gorge / Black Volta
(Location: IWMI HQ Call no: e-copy only Record No: H041920)
http://ghanadamsdialogue.iwmi.org/Data/Sites/2/Documents/The%20Resettlement%20Experience%20of%20Ghana%20-%20Final%20Paper.pdf
https://vlibrary.iwmi.org/PDF/H041920.pdf
https://vlibrary.iwmi.org/PDF/H041920.pdf
(427.07 KB)
4 Akoto-Danso, Edmund Kyei; Raschid-Sally, Liqa; Koranteng, R. T. (Eds.) 2009. Ghana Dams Dialogue Newsletter: a quarterly publication of the Ghana Dams Forum. Ghana Dams Dialogue Newsletter, 1. 8p.
(Location: IWMI HQ Call no: e-copy only Record No: H042474)
5 Akoto-Danso, Edmund Kyei; Raschid-Sally, Liqa; Koranteng, R. T. (Eds.) 2009. Ghana Dams Dialogue Newsletter: a quarterly publication of the Ghana Dams Forum. Ghana Dams Dialogue Newsletter, 2. 8p.
(Location: IWMI HQ Call no: e-copy only Record No: H042479)
6 Sullivan, Amy. 2009. Institutions and governance of small reservoir water resources. In Andreini, Marc; Schuetz, Tonya; Harrington, Larry (Eds.). Small reservoirs toolkit, theme 4b: institutions and governance. Colombo, Sri Lanka: CGIAR Challenge Program on Water and Food (CPWF); Colombo, Sri Lanka: International Water Management Institute (IWMI); Brasilia, DF, Brasil: Brazilian Agricultural Research Corporation (Embrapa Cerrados Center); Harare, Zimbabwe: University of Zimbabwe (UZ); Accra, Ghana: Ghana Water Research Institution (WRI); Delft, The Netherlands: Delft University of Technology (TUD); Stockholm, Sweden: Stockholm Environment Institute (SEI); Marseille, France: Institut de Recherche pour le Developpement (IRD); Bonn, Germany: Center for Development Research, University of Bonn; Ithaca, NY, USA: Cornell University. 9p.
Water governance ; Reservoirs ; Water use ; Institutions ; Community involvement / Africa / Ghana / Volta River Basin / Limpopo River Basin / Akosombo Dam
(Location: IWMI HQ Call no: e-copy only Record No: H042672)
Before indigenous practices and institutions can be evaluated, they first have to be identified, described and characterized. This tool describes the methods used to answer a specific question: “Which indigenous practices, legal frameworks and institutions are most conducive to equitable, win-win, and pro-poor investments within sub-Saharan African transboundary basins”? It describes case studies on transboundary issues and local water governance institutions from the Volta & Limpopo Basins.
7 McCartney, Matthew; King, J. 2011. Use of decision support systems to improve dam planning and dam operation in Africa. [Report of the CGIAR Challenge Program on Water and Food project on Improved Planning of Large Dam Operation: Using Decision Support Systems to Optimize Benefits, Safeguard Health and Protect the Environment] Colombo, Sri Lanka: CGIAR Challenge Program on Water and Food (CPWF). 74p. (CPWF Research for Development (R4D) Series 2)
Dams ; Water management ; Decision support systems ; Decision making ; Environmental effects ; Social aspects ; Rivers ; Ecosystems ; Flow ; River basins ; Water quality ; Health hazards ; Vectorborne diseases ; Irrigation ; Electricity generation / Africa / Ghana / Nigeria / Ethiopia / Egypt / Lesotho / Zambia / Zimbabwe / Mali / Uganda / Sudan / Chara Chara Dam / Akosombo Dam / High Aswan Dam / Katse Dam / Kariba Dam / Manantali Dam / Nalubaale-Kiira Dam / Gariep and Van der Kloof Dam / Roseires Dam / Hadeji-Nguru Wetlands / Koka Reservoir / Upper Blue Nile
(Location: IWMI HQ Call no: e-copy only Record No: H043883)
https://cgspace.cgiar.org/bitstream/handle/10568/3623/R4D02_dss_sept4_web.pdf?sequence=8
https://vlibrary.iwmi.org/pdf/H043883.pdf
https://vlibrary.iwmi.org/pdf/H043883.pdf
(2.00 MB) (2.10 MB)
8 Bird, Jeremy. 2013. Water security and climate change challenges in developing countries. In Brittlebank, W.; Saunders, J. (Eds.). Climate action 2013-2014. [Produced for COP19 - United Nations Climate Change Conference, Warsaw, Poland, 11-22 November 2013]. London, UK: Climate Action; Nairobi, Kenya: United Nations Environment Programme (UNEP). pp.145-148.
Water security ; Water management ; Water storage ; Water power ; Climate change ; Developing countries ; Development projects ; Rain ; Models ; Agricultural sector ; Farmers ; Living standards ; River basins ; Dams ; Case studies / West Africa / Ghana / Burkina Faso / Volta River Basin / Akosombo Dam
(Location: IWMI HQ Call no: 577.22 G000 BRI Record No: H047240)
(1.95 MB)
9 Ndehedehe, C. E.; Awange, J. L.; Kuhn, M.; Agutu, N. O.; Fukuda, Y. 2017. Analysis of hydrological variability over the Volta River Basin using in-situ data and satellite observations. Journal of Hydrology: Regional Studies, 12:88-110. [doi: https://doi.org/10.1016/j.ejrh.2017.04.005]
Climate change ; Hydrological factors ; Satellite observation ; Water storage ; Freshwater ; Water levels ; Precipitation ; Rainfall patterns ; Water power ; Reservoirs ; River basins ; Lakes ; Dams ; Stream flow ; Flow discharge ; Evapotranspiration ; Regression analysis / West Africa / Ghana / Volta River Basin / Lake Volta / Akosombo Dam
(Location: IWMI HQ Call no: e-copy only Record No: H048301)
http://www.sciencedirect.com/science/article/pii/S2214581816303305/pdfft?md5=3f4fc1b2b412198a36f1db58fe1fcc0f&pid=1-s2.0-S2214581816303305-main.pdf
https://vlibrary.iwmi.org/pdf/H048301.pdf
https://vlibrary.iwmi.org/pdf/H048301.pdf
(2.80 MB) (2.80 MB)
By combining satellite altimetry with Gravity Recovery and Climate Experiment derived terrestrial water storage-TWS (2002–2014), this study used a two-step procedure based on spherical harmonic synthesis and statistical decomposition to support the understanding of the Volta basin's natural hydrology and its freshwater systems. Results indicate that Lake Volta contributed 41.6% to the observed increase in TWS over the basin during the 2002–2014 period. The statistical decomposition of TWS over the basin (after removing the Lake's water storage) resulted in a statistically significant (a = 0.05) loss of 59.5 ± 8.5 mm/yr of TWS in the lower Volta region of the basin between 2007 and 2011. This trend is attributed to a base flow recession resulting from the negative trends in precipitation around the lower Volta (2002–2014) and limited river flows of the Volta river system. While it also coincides with observed decline in net precipitation (-15 mm/yr), the long dry periods in the basin (2001–2007) also contributed to this storage depletion. The Lake Volta shows sensitivity to incoming flows of the Volta river system with a lag spanning between less than one and up to two years. In addition to this, a 4–5 year cycle in the clustering of dry and wet periods resulting from the impact of climate variability on the basin was noticed.
10 Balana, Bedru B.; Mul, Marloes L.; Mante, Yaw. 2017. The economics of re-operating the Akosombo and Kpong hydropower dams. In Ntiamoa-Baidu, Y.; Ampomah, B. Y.; Ofosu, E. A. (Eds.). Dams, development and downstream communities: implications for re-optimising the operations of the Akosombo and Kpong Dams in Ghana. Tema, Ghana: Digibooks Ghana Ltd. pp.277-301.
Economic development ; Dam construction ; Water power ; Ecosystem services ; Cost benefit analysis ; Irrigated farming ; Health hazards ; Fisheries ; Aquatic weeds ; Sediment ; Infrastructure ; Domestic water / Ghana / Akosombo Dam / Kpong Dam
(Location: IWMI HQ Call no: e-copy only Record No: H048405)
11 Mul, Marloes L.; Balana, Bedru; Annor, F. O.; Boateng-Gyimah, M.; Ofosu, E. A.; Dokyi, J. 2017. Framework for re-operating the large hydropower dams to improve local livelihoods and poverty reduction. In Ntiamoa-Baidu, Y.; Ampomah, B. Y.; Ofosu, E. A. (Eds.). Dams, development and downstream communities: implications for re-optimising the operations of the Akosombo and Kpong Dams in Ghana. Tema, Ghana: Digibooks Ghana Ltd. pp.303-318.
Water power ; Water availability ; Dam construction ; Living standards ; Downstream ; Local communities ; Poverty ; River basins ; Economic aspects ; Social aspects ; Investment ; Ecosystem services ; Case studies / Ghana / Volta River / Akosombo Dam / Kpong Dam
(Location: IWMI HQ Call no: e-copy only Record No: H048406)
12 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
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.
13 Ntiamoa-Baidu, Y.; Ampomah, B. Y.; Ofosu, E. A. (Eds.) 2017. Dams, development and downstream communities: implications for re-optimising the operations of the Akosombo and Kpong Dams in Ghana. Tema, Ghana: Digibooks Ghana Ltd. 466p.
Dams ; Downstream ; Community development ; Local communities ; Development projects ; Environmental flows ; Environmental impact ; River basin management ; Hydrology ; Fisheries ; Living standards ; Biodiversity ; Aquatic environment ; Aquatic weeds ; Groundwater recharge ; Rain ; Temperature ; Water power ; Energy generation ; Restoration ecology ; Socioeconomic environment ; Economic aspects ; Poverty ; Lakes ; Corporate culture ; Public health ; Drinking water ; Water supply ; Mapping ; Case studies / Ghana / Akosombo Dam / Kpong Dam / Lower Volta River / Volta Lake
(Location: IWMI HQ Call no: 627.8 G200 NTI Record No: H048570)
14 Addo, K. A.; Brempong, E. K.; Jayson-Quashigah, P. N. 2020. Assessment of the dynamics of the Volta River Estuary shorelines in Ghana. Geoenvironmental Disasters, 7:19. [doi: https://doi.org/10.1186/s40677-020-00151-1]
Rivers ; Estuaries ; Coastal erosion ; Brackishwater environment ; Disaster risk reduction ; Vulnerability ; Assessment ; Sediment ; Flooding ; Climate change ; Communities / Ghana / Volta River Estuary / Volta Delta / Akosombo Dam
(Location: IWMI HQ Call no: e-copy only Record No: H049778)
https://geoenvironmental-disasters.springeropen.com/track/pdf/10.1186/s40677-020-00151-1
https://vlibrary.iwmi.org/pdf/H049778.pdf
https://vlibrary.iwmi.org/pdf/H049778.pdf
(1.66 MB) (1.66 MB)
Estuarine shorelines similar to marine coastlines are highly dynamic and may increase disaster risk in vulnerable communities. The situation is expected to worsen with climate change impacts and increasing anthropogenic activities such as upstream water management. This study assessed shoreline changing trends along the Volta river estuary in Ghana as well as the marine coastline using satellite imageries, orthophotos and topographic maps spanning a period of 120 years (1895, 1990, 2000, 2005 and 2015). Linear regression method in the Digital Shoreline Analysis System (DSAS) was used to determine the estuary shoreline migration trend by estimating the shorelines rate of change for the eastern and western sides of the estuary. The rates of change of the marine coastlines on the east and west of the estuary were also estimated. The results show that the eastern and western shoreline of the estuary are eroding at an average rate of about 1.94 m/yr and 0.58 m/yr respectively. The coastlines on the marine side (eastern and western) are eroding at an average rate of about 2.19 m/yr and 0.62 m/yr respectively. Relatively high rates of erosion observed on the eastern estuarine shoreline as well as the coastline could be explained by the reduced sediment supply by the Volta River due to the damming of the Volta River in Akosombo and the sea defence structures constructed to manage erosion problems. The trend is expected to increase under changing oceanographic conditions and increased subsidence in the Volta delta. Effective management approach, such as developing disaster risk reduction strategy, should be adopted to increase the resilience of the communities along the estuarine shoreline and increase their adaptive capacity to climate change hazards and disasters.
15 Owusu, A.; Salazar, J. Z.; Mul, M.; van der Zaag, P.; Slinger, J. 2023. Quantifying the trade-offs in re-operating dams for the environment in the Lower Volta River. Hydrology and Earth System Sciences, 27(10):2001-2017. [doi: https://doi.org/10.5194/hess-27-2001-2023]
Dams ; River basins ; Ecosystem services ; Environmental flows ; Irrigation ; Hydropower ; Reservoirs ; Flood control ; Climate change ; Climate prediction ; Water users ; Communities / Ghana / Lower Volta River Basin / Akosombo Dam / Kpong Dam
(Location: IWMI HQ Call no: e-copy only Record No: H052038)
https://hess.copernicus.org/articles/27/2001/2023/hess-27-2001-2023.pdf
https://vlibrary.iwmi.org/pdf/H052038.pdf
https://vlibrary.iwmi.org/pdf/H052038.pdf
(2.98 MB) (2.98 MB)
The construction of the Akosombo and Kpong dams in the Lower Volta River basin in Ghana changed the downstream riverine ecosystem and affected the lives of downstream communities, particularly those who lost their traditional livelihoods. In contrast to the costs borne by those in the vicinity of the river, Ghana has enjoyed vast economic benefits from the affordable hydropower, irrigation schemes and lake tourism that developed after construction of the dams. Herein lies the challenge; there exists a trade-off between water for river ecosystems and related services on the one hand and anthropogenic water demands such as hydropower or irrigation on the other. In this study, an Evolutionary Multi-Objective Direct Policy Search (EMODPS) is used to explore the multi-sectoral trade-offs that exist in the Lower Volta River basin. Three environmental flows, previously determined for the Lower Volta, are incorporated separately as environmental objectives. The results highlight the dominance of hydropower production in the Lower Volta but show that there is room for providing environmental flows under current climatic and water use conditions if the firm energy requirement from Akosombo Dam reduces by 12 % to 38 % depending on the environmental flow regime that is implemented. There is uncertainty in climate change effects on runoff in this region; however multiple scenarios are investigated. It is found that climate change leading to increased annual inflows to the Akosombo Dam reduces the trade-off between hydropower and the environment as this scenario makes more water available for users. Furthermore, climate change resulting in decreased annual inflows provides the opportunity to strategically provide dry-season environmental flows, that is, reduce flows sufficiently to meet low flow requirements for key ecosystem services such as the clam fishery. This study not only highlights the challenges in balancing anthropogenic water demands and environmental considerations in managing existing dams but also identifies opportunities for compromise in the Lower Volta River.
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