Your search found 3 records
1 Sood, Aditya; Seidou, O.; Forkuor, G.; Annor, F. O.; McCartney, Matthew. 2016. Simulating current and future Volta Basin water development scenarios. 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.245-273.
River basin development ; Water resources development ; Water yield ; Water storage ; Water allocation ; Reservoir storage ; Hydrology ; Models ; Climate change ; Calibration ; Soil moisture / West Africa / Benin / Burkina Faso / Ivory Coast / Ghana / Mali / Togo / Volta River Basin
(Location: IWMI HQ Call no: IWMI Record No: H047736)
2 Kheradmand, S.; Seidou, O.; Konte, D.; Batoure, M. B. B. 2018. Evaluation of adaptation options to flood risk in a probabilistic framework. Journal of Hydrology: Regional Studies, 19:1-16. [doi: https://doi.org/10.1016/j.ejrh.2018.07.001]
Flooding ; Risk assessment ; Adaptation ; Evaluation ; Floodplains ; Weather hazards ; Mapping ; Probability analysis ; Hydrology ; Models / West Africa / Niger / Niamey / Niger River Basin
(Location: IWMI HQ Call no: e-copy only Record No: H048913)
https://www.sciencedirect.com/science/article/pii/S2214581818300417/pdfft?md5=882a660199d75c84e350d4a6d94ec2aa&pid=1-s2.0-S2214581818300417-main.pdf
https://vlibrary.iwmi.org/pdf/H048913.pdf
https://vlibrary.iwmi.org/pdf/H048913.pdf
(5.66 MB) (5.66 MB)
Study region: City of Niamey, Niger, West Africa.
Study focus: This paper aims to explore the possibility of implementing a probabilistic framework for flood risk estimation for the city of Niamey, Niger. A probabilistic set of flood maps were generated by forcing a HEC-RAS model with a stochastically generated ensemble of flood peaks representing the river regime at Niamey. Loss curves were derived from expert judgment, and various adaptation options to flood risk were examined by considering two main variables: a) buildings’ material; b) dike height (ranged from 180.5 m to 184 m, at a 0.5 m interval) within a scenario-based framework. Floods with return periods of 2- to 1000-yr were considered in estimating total loss, and benefits and costs of different adaptation options were compared.
New hydrological insights for the region: It was found that increasing the height of the dikes would lead to smaller economic losses, while rebuilding with better materials would increase the average annual economic losses, but might decrease the risk of human casualties. Individual and combined impact of decision variables on flood risk were estimated for the city of Niamey. Quantitative tools were developed to help decision-makers and regulators choose the best preventive measures to mitigate flood risk.
Study focus: This paper aims to explore the possibility of implementing a probabilistic framework for flood risk estimation for the city of Niamey, Niger. A probabilistic set of flood maps were generated by forcing a HEC-RAS model with a stochastically generated ensemble of flood peaks representing the river regime at Niamey. Loss curves were derived from expert judgment, and various adaptation options to flood risk were examined by considering two main variables: a) buildings’ material; b) dike height (ranged from 180.5 m to 184 m, at a 0.5 m interval) within a scenario-based framework. Floods with return periods of 2- to 1000-yr were considered in estimating total loss, and benefits and costs of different adaptation options were compared.
New hydrological insights for the region: It was found that increasing the height of the dikes would lead to smaller economic losses, while rebuilding with better materials would increase the average annual economic losses, but might decrease the risk of human casualties. Individual and combined impact of decision variables on flood risk were estimated for the city of Niamey. Quantitative tools were developed to help decision-makers and regulators choose the best preventive measures to mitigate flood risk.
3 Liersch, S.; Fournet, S.; Koch, H.; Djibo, A. G.; Reinhardt, J.; Kortlandt, J.; Van Weert, F.; Seidou, O; Klop, E; Baker, C.; Hattermann, F. F. 2019. Water resources planning in the upper Niger River basin: are there gaps between water demand and supply? Journal of Hydrology: Regional Studies, 21:176-194. [doi: https://doi.org/10.1016/j.ejrh.2018.12.006]
Water resources ; Planning ; Water demand ; Water supply ; Reservoirs ; Dams ; Irrigation management ; Climate change ; Forecasting ; Irrigation schemes ; Hydropower ; Water use efficiency ; River basins ; Government agencies ; Hydrology ; Models ; Uncertainty / West Africa / Mali / Niger River Basin / Bani River Basin / Inner Niger Delta / Selingue Dam / Fomi Dam
(Location: IWMI HQ Call no: e-copy only Record No: H049514)
https://www.sciencedirect.com/science/article/pii/S2214581818301939/pdfft?md5=7c0f02d2fcba4adeea01f4450d78823f&pid=1-s2.0-S2214581818301939-main.pdf
https://vlibrary.iwmi.org/pdf/H049514.pdf
https://vlibrary.iwmi.org/pdf/H049514.pdf
(10.00 MB) (10.0 MB)
Study region
The Upper Niger and Bani River basins in West Africa.
Study focus
The growing demand for food, water, and energy led Mali and Guinea to develop ambitious hydropower and irrigation plans, including the construction of a new dam and the extension of irrigation schemes. These two developments will take place upstream of sensible ecosystem hotspots while the feasibility of development plans in terms of water availability and sustainability is questionable. Where agricultural development in past decades focused mainly on intensifying dry-season crops cultivation, future plans include extension in both the dry and wet seasons.
New hydrological insights for the region
Today’s irrigation demand corresponds to 7% of the average annual Niger discharge and could account to one third in 2045. An extension of irrigated agriculture is possible in the wet season, while extending dry-season cropping would be largely compromised with the one major existing Sélingué dam. An additional large Fomi or Moussako dam would not completely satisfy dry-season irrigation demands in the 2045 scenario but would reduce the estimated supply gap from 36% to 14%. However, discharge peaks may decrease by 40% reducing the inundated area in the Inner Niger Delta by 21%, while average annual discharge decreases by 30%. Sustainable development should therefore consider investments in water-saving irrigation and management practices to enhance the feasibility of the envisaged irrigation plans instead of completely relying on the construction of a flow regime altering dam.
The Upper Niger and Bani River basins in West Africa.
Study focus
The growing demand for food, water, and energy led Mali and Guinea to develop ambitious hydropower and irrigation plans, including the construction of a new dam and the extension of irrigation schemes. These two developments will take place upstream of sensible ecosystem hotspots while the feasibility of development plans in terms of water availability and sustainability is questionable. Where agricultural development in past decades focused mainly on intensifying dry-season crops cultivation, future plans include extension in both the dry and wet seasons.
New hydrological insights for the region
Today’s irrigation demand corresponds to 7% of the average annual Niger discharge and could account to one third in 2045. An extension of irrigated agriculture is possible in the wet season, while extending dry-season cropping would be largely compromised with the one major existing Sélingué dam. An additional large Fomi or Moussako dam would not completely satisfy dry-season irrigation demands in the 2045 scenario but would reduce the estimated supply gap from 36% to 14%. However, discharge peaks may decrease by 40% reducing the inundated area in the Inner Niger Delta by 21%, while average annual discharge decreases by 30%. Sustainable development should therefore consider investments in water-saving irrigation and management practices to enhance the feasibility of the envisaged irrigation plans instead of completely relying on the construction of a flow regime altering dam.
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