Your search found 7 records
1 Mohamed, Yasir Abbas; Savenije, H. H.; Bastiaanssen, W. G. M.; van den Hurk, B. J. J. M. 2006. New lessons on the Sudd hydrology learned from remote sensing and climate modeling. Hydrology and Earth System Sciences, 10(4):507-518.
(Location: IWMI-HQ Call no: IWMI 551.48 G146 MOH Record No: H039748)
http://www.hydrol-earth-syst-sci.net/10/507/2006/hess-10-507-2006.pdf
https://vlibrary.iwmi.org/pdf/H039748.pdf
https://vlibrary.iwmi.org/pdf/H039748.pdf
2 Mohamed, Yasir Abbas; van den Hurk, B. J. J. M.; Savenije, H. H. 2007. Moisture recycling over the Nile Basin. In Reducing the Vulnerability of Societies to Water Related Risks at the Basin Scale: Proceedings of the Third International Symposium on Integrated Water Resources Management, Bochum, Germany, 26-28 September 2006. IAHS publication 317. pp.18-23.
River basins ; Moisture content ; Recycling ; Evaporation ; Precipitation ; Climate ; Models ; Wetlands / Middle East / Nile Basin
(Location: IWMI-HQ Call no: IWMI 551.57 GG30 MOH Record No: H039749)
3 Mohamed, Yasir Abbas; Loulseged, M. 2006. Creating synergies and a partnership among the CGIAR, Nile Basin Initiative and ASARECA: Consultations to identify opportunities to support NBI through research and capacity building: Project interim report. Report submitted by IWMI Nile Basin and East Africa Sub-Regional Office, Addis Ababa, Ethiopia, to International Development Research Centre (IDRC). Project No.103448. 27p.
Research projects ; Research institutes ; Agricultural research ; Capacity building ; River basins / Middle East / Nile Basin
(Location: IWMI-HQ Call no: IWMI 333.91 GG30 MOH Record No: H039750)
4 Mohamed, Yasir Abbas; Loulseged, M. 2007. Creating Synergies and a Partnership among the CGIAR, Nile Basin Initiative and ASARECA: Consultations to Identify Opportunities to Support NBI through Research and Capacity Building: Project report. NBI Synergy Project Report No.103448, submitted by IWMI, NBI and ASARECA to International Development Research Centre (IDRC), April 2007. 58p.
Research projects ; Research institutes ; Agricultural research ; Capacity building ; River basins / Middle East
(Location: IWMI HQ Call no: IWMI 333.91 GG30 MOH Record No: H040775)
5 Awulachew, Seleshi Bekele; McCartney, Matthew; Shiferaw, Y. S.; Mohamed, Yasir Abbas. 2008. Hydrological water availability, trends and allocation in the Blue Nile Basin. In Abtew, W.; Melesse, A. M. (Eds.). Proceedings of the Workshop on Hydrology and Ecology of the Nile River Basin under Extreme Conditions, Addis Ababa, Ethiopia, 16-19 June 2008. Sandy, UT, USA: Aardvark Global Publishing. pp.293.
River basins ; Hydrology ; Water availability ; Analysis ; Water use / Ethiopia / Sudan / Blue Nile River Basin
(Location: IWMI HQ Call no: e-copy only Record No: H041756)
Rainfall varies significantly with altitude and is considerably greater in the Ethiopian highlands than on the Plains of Sudan with in the Blue Nile river. The river is the principal tributary of the main Nile River providing 62% of the flow (approximately 50 billion m3 per year) reaching Aswan. Both the temporal and spatial distribution of rainfall is governed by the movement of air masses associated with the Inter-Tropical Convergence Zone (ITCZ). The variation of flow is extreme, and any meaningful development centering water therefore requires considerable investment on water control and management to offset variability. Ethiopia currently utilizes very little of the Abay water. In contrast, Sudan uses significant volumes both for irrigation (currently in excess of 1,1 million ha) and for hydropower production. However, there remains significant potential for additional exploitation and both Ethiopia and Sudan have plans to further develop the water resources of the river. In Ethiopia, major irrigation schemes with a total area of approximately 164,000ha are planned for completion by 2010 and 815,000ha in long term. In addition, several hydropower dams, including four located on the main stem of the river, are being contemplated. In Sudan, it is planned to develop 889,000ha of additional irrigation by 2025. This paper provides an overview of the basin characteristics, hydrology of Blue Nile, brief evaluation of the current and future status of water resource development. The future development in Ethiopia for consumptive water use, limited by land potential, is an order of magnitude of 5-6km3, net water, about 10% of its runoff contribution. Similar analysis for Sudan shows possible use of 9km3. The analysis helps policy makers to base their decision on an informed basis.In Ethiopia, several major irrigation schemes, with a total area of approximately 164,000 ha, are planned for completion by 2010. In addition several hydropower dams, including four located on the main stem of the river, are being contemplated. In the Sudan, no additional hydropower is being considered, but it is planned to develop an additional 889,000 ha of irrigation by 2025. In this study the Water Evaluation and Planning (WEAP) model was used to investigate both the current situation and future water demand scenarios. Time series of flows were generated (on a monthly time-step) to determine inter-annual and seasonal variability in water availability in the major tributaries. Existing water use, related to irrigation and hydropower, was estimated from actual data. Future development scenarios were based on information obtained from commissioned projects and the national water resource master plans. This paper illustrates the value of scenarios, and the application of a relatively simple model, to assess the implications of proposed water resource development.
6 Betrie, G. D.; Mohamed, Yasir Abbas; van Griensven, A.; Popescu, I.; Mynett, A. 2009. Modeling of soil erosion and sediment transport in the Blue Nile Basin using the Open Model Interface approach. In Awulachew, Seleshi Bekele; Erkossa, Teklu; Smakhtin, Vladimir; Fernando, Ashra (Comps.). Improved water and land management in the Ethiopian highlands: its impact on downstream stakeholders dependent on the Blue Nile. Intermediate Results Dissemination Workshop held at the International Livestock Research Institute (ILRI), Addis Ababa, Ethiopia, 5-6 February 2009. Colombo, Sri Lanka: International Water Management Institute (IWMI). pp.132-140.
Erosion ; Highlands ; Sedimentary materials ; Simulation models ; River basin management ; Reservoirs / Ethiopia / Blue Nile River Basin / Roseires Reservoir / Sennar Reservoir
(Location: IWMI HQ Call no: IWMI 333.9162 G100 AWU Record No: H042513)
(0.41 MB)
Rapid land use change due to intensive agricultural practices in the Ethiopian Highlands, results in increasing rates of soil erosion. This manifested in significant impacts downstream by reducing the storage capacity of reservoirs (e.g., Roseires, Sennar), and high desilting costs of irrigation canals. Therefore, this paper aims to provide a better understanding of the process at basin scale. The Soil and Water Assessment Tool (SWAT) was used to model soil erosion in the upper catchments of the Blue Nile over the Ethiopian Plateau. The SWAT output forms the input sediment load for SOBEK, a river morphology model. The two models integrated using the principles of the Open Model Interface (OpenMI) at the Ethiopia-Sudan border. The Nash-Sutcliffe coefficient was found to be 0.72 and 0.66 for results of SWAT daily sediment calibration and validation, respectively. The SOBEK results also show a good fit of the simulated river flows at Roseires and Sennar reservoirs, both for calibration and validation. The results of the integrated modeling system showed 86 million tonnes/year of sediment load from the Upper Blue Nile, while SOBEK computes on average 19 Mm3/year of sediment deposition in the Roseires Reservoir. The spatial variability of soil erosion computed with SWAT showed more erosion over the northeastern part of the Upper Blue Nile, followed by the northern part. The overall exercise indicates that the integrated modeling is a promising approach to understand soil erosion, sediment transport, and sediment deposition in the Blue Nile Basin. This will improve the understanding of the upstream-downstream interdependencies, for better land and water management at basin scale.
7 Hamid, S. H.; Mohamed, A. A.; Mohamed, Yasir Abbas. 2011. Towards a performance-oriented management for large-scale irrigation systems: case study, Rahad scheme, Sudan. Irrigation and Drainage, 60(1):20-34. [doi: https://doi.org/10.1002/ird.546]
Irrigation systems ; Canals ; Performance indexes ; Decision making ; Water allocation ; Computer software ; Remote sensing / Sudan / Rahad Irrigation Scheme
(Location: IWMI HQ Call no: PER Record No: H043584)
(1.13 MB)
The underperformance problem of large-scale irrigation systems particularly in developing countries, has adversely affected levels of production of those systems. The fact that these irrigation systems are not managed in response to their performance has been identified as the main reason behind their malfunctioning. A performance-oriented management approach is demonstrated here to help irrigation system managers take the right decisions, through continuous in-season performance assessment. The Advanced Very High Resolution Radiometer satellite images of the National Oceanic and Atmospheric Administration (NOAA-AVHRR) for the year 2000, complemented by water release data, were used to assess the performance of the Rahad irrigation scheme, Sudan (126 000 ha), on a 10-day time step. The Surface Energy Balance Algorithm (SEBAL) was used to process the NOAA-AVHRR images. The decisions on irrigation water allocation are guided by maps of the relative water supply and soil moisture content generated for the last time step. Further decision support could be realized using the performance indicators of the system and the soil water balance for the given time step. A semiautomatic computer program was developed which can be easily used by field staff to support their management decisions. It is anticipated that the application of such an approach will improve the performance of large-scale irrigation systems, and support development of a performance-oriented management culture among the staff of these irrigation systems.
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