Your search found 5 records
1 Alvi, S. H.; Elagib, N. A.. 1995. Hydrological behaviour of the swampy region of Southern Sudan. In Oman. Ministry of Water Resources, The Sultanate of Oman International Conference on Water Resources Management in Arid Countries, Muscat, Oman, 12-16 March 1995. Volume 2: Nizwa/Bahla Sessions, display papers. Muscat, Oman: The Ministry. pp.735-741.
(Location: IWMI-HQ Call no: 333.91 G728 OMA Record No: H016753)
2 Alvi, S. H.; Elagib, N. A.. 1996. Study of hydrology and drought in the flood region of Sudan. Water International, 21(2):76-82.
Water resources ; Hydrology ; Drought ; Stream flow ; Rain ; Evaporation ; Rivers ; Water management / Sudan / Nile River / White Nile / Sobat River
(Location: IWMI-HQ Call no: PER Record No: H03916)
3 Al Zayed, I. S.; Elagib, N. A.. 2017. Implications of non-sustainable agricultural water policies for the water-food nexus in large-scale irrigation systems: a remote sensing approach. Advances in Water Resources, 110:408-422. [doi: https://doi.org/10.1016/j.advwatres.2017.07.010]
Water policy ; Sustainable agriculture ; Irrigation systems ; Large scale systems ; Remote sensing ; Satellite imagery ; Rain ; Irrigation water ; Water management ; Food security ; Crop production ; Water use efficiency ; Irrigation efficiency ; Indicators ; Vegetation index ; Evapotranspiration ; Energy balance ; Models ; Monitoring ; Performance evaluation / Sudan / Gezira Irrigation Scheme
(Location: IWMI HQ Call no: e-copy only Record No: H048431)
(5.79 MB)
This study proposes a novel monitoring tool based on Satellite Remote Sensing (SRS) data to examine the status of water distribution and Water Use Efficiency (WUE) under changing water policies in large-scale and complex irrigation schemes. The aim is to improve our understanding of the water-food nexus in such schemes. With a special reference to the Gezira Irrigation Scheme (GeIS) in Sudan during the period 2000–2014, the tool devised herein is well suited for cases where validation data are absent. First, it introduces an index, referred to as the Crop Water Consumption Index (CWCI), to assess the efficiency of water policies. The index is defined as the ratio of actual evapotranspiration (ETa) over agricultural areas to total ETa for the whole scheme where ETa is estimated using the Simplified Surface Energy Balance model (SSEB). Second, the tool uses integrated Normalized Difference Vegetation Index (iNDVI), as a proxy for crop productivity, and ETa to assess the WUE. Third, the tool uses SSEB ETa and NDVI in an attempt to detect wastage of water. Four key results emerged from this research as follows: 1) the WUE has not improved despite the changing agricultural and water policies, 2) the seasonal ETa can be used to detect the drier areas of GeIS, i.e. areas with poor irrigation water supply, 3) the decreasing trends of CWCI, slope of iNDVI-ETa linear regression and iNDVI are indicative of inefficient utilization of irrigation water in the scheme, and 4) it is possible to use SSEB ETa and NDVI to identify channels with spillover problems and detect wastage of rainwater that is not used as a source for irrigation. In conclusion, the innovative tool developed herein has provided important information on the efficiency of a large-scale irrigation scheme to help rationalize laborious water management processes and increase productivity.
4 Al-Saidi, M.; Elagib, N. A.; Ribbe, L.; Schellenberg, T.; Roach, E.; Oezhan, D. 2017. Water-energy-food security nexus in the eastern Nile basin: assessing the potential of transboundary regional cooperation. In Salam, P. A.; Shrestha, S.; Pandey, V. P.; Anal, A. K. (Eds.). Water-energy-food nexus: principles and practices. Indianapolis, IN, USA: Wiley. pp.103-116.
Water resources ; Food security ; Energy resources ; Energy demand ; Nexus ; River basins ; Assessment ; International waters ; Regional policies ; Cooperation ; Development projects ; Land degradation ; Riparian zones ; Reservoirs ; Fuelwood ; Surface water / Tanzania / Uganda / Rwanda / Burundi / Democratic Republic of the Congo / Kenya / Ethiopia / Eritrea / South Sudan / Republic of the Sudan / Egypt / Nile Basin
(Location: IWMI HQ Call no: IWMI Record No: H048741)
5 Elagib, N. A.; Saad, S. A. G.; Basheer, M.; Rahma, A. E.; Gore, E. D. L. 2021. Exploring the urban water-energy-food nexus under environmental hazards within the Nile. Stochastic Environmental Research and Risk Assessment, 35(1):21-41. [doi: https://doi.org/10.1007/s00477-019-01706-x]
Water resources ; Energy generation ; Food security ; Nexus ; Environmental factors ; Hazards ; Urban agriculture ; Irrigated farming ; Hydrology ; Hydropower ; Water treatment plant ; Drought ; Rain ; Flooding ; Sediment ; Turbidity ; Case studies / Sudan / Nile River Basin / Khartoum / Jebel Aulia Dam
(Location: IWMI HQ Call no: e-copy only Record No: H050197)
(10.70 MB)
The integrative approach of water, energy, and food nexus (WEF nexus) is now widely accepted to offer better planning, development, and operation of these resources. This study presents a first attempt towards understanding the WEF nexus of urban environments in the Nile River Basin under conditions of hydrological droughts and fluvial floods. A case study was conducted for the capital of Sudan, Khartoum, at the confluence of the White Nile and the Blue Nile for illustration. The results were based on analyses of river flow and water turbidity data, field observations, a printed questionnaire and an interview of farmers practicing irrigated agriculture, and hydropower modeling. The study analyzes indicators for the association of the river water resources environment (intra-annual regime, quantity, and quality), the status of urban irrigated agriculture, water treatment for domestic use, and hydropower generation under hydrological extremes, i.e. droughts and fluvial floods. It additionally examines the consequent interactions between the impacts on three sectors. The present study shows how floods and droughts impose impacts on seasonal river water quality and quantity, water treatment for domestic use, irrigated agriculture, and hydro-energy supply in an urban environment. The results demonstrate how the two hydrological phenomena determine the state of hydropower generation from dams, i.e. high energy production during floods and vice versa during droughts. Hydropower dams, in turn, could induce cons in the form of low fertile soils in the downstream due to sediment retention by the reservoir. Finally, present and potential options to minimize the above risks are discussed. This study is hoped to offer good support for integrated decision making to increase the resource use efficiency over the urban environment within the Nile Basin.
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