Your search found 6 records
1 Yilma, Aster Denekew; Awulachew, Seleshi Bekele. 2009. Characterization and atlas of the Blue Nile Basin and its sub basins. 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. Summary report, abstracts of papers with proceedings on CD-ROM. Colombo, Sri Lanka: International Water Management Institute (IWMI). 236p.
Maps ; River basins ; Watersheds ; Topography ; Climate ; Evapotranspiration ; Rain ; Evaporation ; Hydrology ; Land cover ; Meteorology ; Population / Africa / Ethiopia / Sudan / Blue Nile River Basin / Abbay Basin / Tana Sub Basin / Jemma Sub Basin / Muger Sub Basin / Guder Sub Basin / Beles Sub Basin / Dabus Sub Basin / Didessa Sub Basin / Fincha Sub Basin / Anger Sub Basin / Wenbera Sub Basin / Beshelo Sub Basin / Welaka Sub Basin / North Gojam Sub Basin / South Gojam Sub Basin / Dinder Sub Basin / Rahad Sub Basin / Gilgel Abay Watershed / Gumera Watershed / Anjeni Micro Watershed / Andit Micro Watershed
(Location: IWMI HQ Call no: IWMI 333.9162 G100 AWU Record No: H042502)
(57.34 MB)
2 Yalew, S. G.; Mul, Marloes L.; van Griensven, A.; Teferi, E.; Priess, J.; Schweitzer, C.; van Der Zaag, P. 2016. Land-use change modelling in the Upper Blue Nile Basin. Environments, 3(3):1-16. [doi: https://doi.org/10.3390/environments3030021]
Land use ; Land cover change ; Environmental modelling ; Environmental factors ; River basins ; Catchment areas ; Socioeconomic environment ; Plantations ; Forest management ; Erosion ; Vegetation ; Grasslands / Ethiopia / Upper Blue Nile Basin / Abbay Basin / Jedeb Catchment
(Location: IWMI HQ Call no: e-copy only Record No: H047679)
(1.24 MB)
Land-use and land-cover changes are driving unprecedented changes in ecosystems and environmental processes at different scales. This study was aimed at identifying the potential land-use drivers in the Jedeb catchment of the Abbay basin by combining statistical analysis, field investigation and remote sensing. To do so, a land-use change model was calibrated and evaluated using the SITE (SImulation of Terrestrial Environment) modelling framework. SITE is cellular automata based multi-criteria decision analysis framework for simulating land-use conversion based on socio-economic and environmental factors. Past land-use trajectories (1986–2009) were evaluated using a reference Landsat-derived map (agreement of 84%). Results show that major land-use change drivers in the study area were population, slope, livestock and distances from various infrastructures (roads, markets and water). It was also found that farmers seem to increasingly prefer plantations of trees such as Eucalyptus by replacing croplands perhaps mainly due to declining crop yield, soil fertility and climate variability. Potential future trajectory of land-use change was also predicted under a business-as-usual scenario (2009–2025). Results show that agricultural land will continue to expand from 69.5% in 2009 to 77.5% in 2025 in the catchment albeit at a declining rate when compared with the period from 1986 to 2009. Plantation forest will also increase at a much higher rate, mainly at the expense of natural vegetation, agricultural land and grasslands. This study provides critical information to land-use planners and policy makers for a more effective and proactive management in this highland catchment.
3 Adgolign, T. B.; Srinivasa Rao, G. V. R.; Abbulu, Y. 2016. WEAP modeling of surface water resources allocation in Didessa Sub-Basin, West Ethiopia. Sustainable Water Resources Management, 2(1):55-70. [doi: https://doi.org/10.1007/s40899-015-0041-4]
Water resources development ; Surface water ; Water allocation ; Hydrology ; Simulation models ; Water supply ; Irrigation water ; Domestic water ; Water demand ; Water requirements ; Water use ; Water shortage ; Environmental flows ; Stream flow ; Watersheds ; River basins ; Tributaries / Ethiopia / Abbay Basin / Didessa Sub-Basin
(Location: IWMI HQ Call no: e-copy only Record No: H047974)
(3.68 MB)
The extensive water resources development plan that Ethiopia has recently embarked on encompasses all major river basins, including the Abbay Basin where Didessa Sub-basin is situated. The main objective of the study was to assess the impact of water resources development on instream and downstream water availability, and identify intra-sub-basin locations vulnerable to shortage of surface water, in Didessa Sub-basin. The Water Evaluation And Planning (WEAP) Tool was used to model the surface water resources allocation of the sub-basin, based on the water demand data extracted mainly from the Abbay Basin integrated development master plan. Existing demand sites were collected from irrigation and water supply sectors of the government. To estimate the crop water requirement and instream flows requirement (IFR), respectively CROPWAT 8.0 and Indicators of Hydrologic Alteration (IHA) programs were used. The shortage of recorded data of streamflow was supplemented by the outputs of SWAT hydrological model. Three development scenarios, viz., current development (2014), medium-term future development (2015–2030) and long-term future development (2031–2050), were built. It was demonstrated that the model sufficiently represented surface water flow of the sub-basin. The results indicated that at the last year of scenarios (2050), there will be a 1.101 billion cubic meters (BCM), i.e., 10.3 %, reduction in the total annual flow of Didessa River. Besides, it was found out that some of the schemes in Anger, Dabena and Upper Didessa watersheds will have unmet demands at the last year of scenarios. Nonetheless, it was shown that IFR of 5.46 BCM will be fully delivered at the outlet of Didessa River; hence, no sub-basin wide absolute scarcity of water would develop.
4 Nigussie, Likimyelesh; Haile, Alemseged Tamiru; Gowing, J.; Walker, D.; Parkin, G. 2020. Citizen science in community-based watershed management: an institutional analysis in Ethiopia. Colombo, Sri Lanka: International Water Management Institute (IWMI). 25p. (IWMI Working Paper 191) [doi: https://doi.org/10.5337/2020.207]
Watershed management ; Community involvement ; Citizen science ; Water institutions ; Hydrometeorology ; Weather data ; Climatic data ; Monitoring ; Water resources ; Water management ; Natural resources management ; Water security ; Irrigation management ; Small scale systems ; Sustainability ; Governmental organizations ; River basin institutions ; Meteorological stations ; Participatory approaches ; Stakeholders ; Data analysis ; Access to information ; Information dissemination / Ethiopia / Abbay Basin / Rift Valley Lakes Basin
(Location: IWMI HQ Call no: IWMI Record No: H050043)
(1.22 MB)
The engagement of communities (non-scientists) in the collection of reliable hydrometeorological data (a citizen science approach) has the potential to address part of the data gaps in Ethiopia. Due to the high cost of establishing and maintaining gauging stations, hydrometeorological monitoring in the country tends to focus on large river basins (> 1,000 km2) with little or no consideration of small watersheds (< 100 km2). However, hydrologic data from small watersheds are critical for two main reasons: (i) measure the impacts of watershed management interventions on water resources; and (ii) inform local development plans, such as small- and micro-scale irrigation development. Therefore, this paper examines the institutional arrangements for hydrometeorological monitoring and the practices followed by the Basin Development Authority and National Meteorology Agency in Ethiopia. It is important to investigate the possibilities of embedding a citizen science approach into the data collection systems of these two organizations, as this will help to address data gaps, particularly at micro-watershed levels. Based on the assessments, there is potential to embed the approach into the institutional structure of the Ministry of Agriculture (MoA) for hydrometeorological monitoring in micro-watersheds, due to the following reasons: (i) MoA has a high demand for hydrometeorological data from small rivers to be used for small- and micro-scale irrigation development, and for measuring the impacts of watershed development interventions on water resources; and (ii) MoA has an institutional structure from federal to community level that supports the engagement of communities in development interventions. However, effectively embedding the citizen science approach into regular monitoring of MoA depends on the clear distribution of mandates; developing legal, ethical, methodological and quality frameworks; and developing clear data sharing and incentive mechanisms involving all partners.
5 Taye, Meron Teferi; Haile, Alemseged Tamiru; Genet, A.; Geremew, Y.; Wassie, S.; Abebe, B.; Alemayehu, B. 2022. Data quality deterioration in the Lake Tana Sub-basin, Ethiopia: scoping study to provide streamflow and water withdrawal data. Colombo, Sri Lanka: International Water Management Institute (IWMI). 32p. (IWMI Working Paper 204) [doi: https://doi.org/10.5337/2022.208]
Hydrological data ; Data quality ; Lakes ; Stream flow ; Water extraction ; Monitoring ; Flow measurement ; Water level measurement ; Data collection ; Surface water ; Water availability ; Water use ; Irrigation schemes ; Small scale systems ; Water supply ; Urban areas ; Rural settlement ; Drinking water ; Domestic water ; Industry ; Hydropower ; Livestock ; Rainfed agriculture ; Irrigated farming ; Farmer-led irrigation ; Water resources ; Water management ; Planning ; Stakeholders ; Partnerships ; River basin institutions ; Data management ; Alliances ; Climatic data ; Models / Ethiopia / Abbay Basin / Lake Tana Sub-Basin / Gilgel Abay River / Gumara River / Ribb River
(Location: IWMI HQ Call no: IWMI Record No: H051149)
(3.63 MB)
This working paper was prepared under a research project from the Future Leaders – African Independent Research (FLAIR) fellowship programme – focusing on understanding hydrological changes in the Lake Tana sub-basin, Ethiopia, due to water abstraction, land use and climate change. FLAIR is funded by the UK government’s Global Challenges Research Fund (GCRF) through The Royal Society, UK. The study was jointly conducted by the International Water Management Institute (IWMI) and staff of the Abbay Basin Development Office (ABDO). The paper provides information on the deterioration of streamflow data quality in the sub-basin. It demonstrates how to support the sub-basin by generating primary data and compiling current water abstraction data that are relevant for development planning. The project showed the possibility of conducting such activities with limited financial resources and time constraints but with strong collaboration. This work also demonstrated the need for a data alliance among stakeholders in the sub-basin.
6 Tullu, K. T. 2024. Assessment of soil erosion response to climate change in the Sululta Catchment, Abbay Basin, Ethiopia. H2Open Journal, 7(1):23-37. [doi: https://doi.org/10.2166/h2oj.2023.083]
Climate change ; Climate models ; Erosion ; Soil loss ; Assessment ; Geographical information systems ; Rainfall ; Runoff ; Land use ; Precipitation ; Farmland ; Grasslands ; Woodlands / Ethiopia / Addis Ababa / Abbay Basin / Sululta Catchment
(Location: IWMI HQ Call no: e-copy only Record No: H052621)
https://iwaponline.com/h2open/article-pdf/7/1/23/1363084/h2oj0070023.pdf
https://vlibrary.iwmi.org/pdf/H052621.pdf
https://vlibrary.iwmi.org/pdf/H052621.pdf
(1.10 MB) (1.10 MB)
This study aimed to assess the response of soil erosion to climate change in the Sululta catchment using the Revised Universal Soil Loss Equation (RUSLE) integrated with the geographic information system (GIS). The current rainfall erosivity factor (R) was computed from the current rainfall data (1989–2018). Regional climate models (RCMs) under representative concentration pathways RCP4.5 and RCP8.5 were used for future rainfall projection (2021–2080) to determine projected rainfall R factor. Rainfall data, soil map, digital elevation model and land use/land cover data were used to evaluate RUSLE factors in the ArcGIS environment. The results of this study showed that the current average annual soil loss rate was found to be 5.03 tons/ha/year. The average annual soil loss may decrease by 2.78 and 0.80% in 2021–2050 and 2051–2080, respectively, under the RCP4.5 scenario compared to the current average annual soil loss. Under the RCP8.5 scenario, the average annual soil loss may increase by 7.75 and 2.98% in 2021–2050 and 2051–2080, respectively, from the current average annual soil loss. The result reveals that the average annual soil loss decreases in both time periods under RCP4.5 and increases in both time periods under RCP8.5.
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