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Modelling to evaluate the water resource implications of planned infrastructure development in the Lake Tana sub-basin, Ethiopia

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Title Modelling to evaluate the water resource implications of planned infrastructure development in the Lake Tana sub-basin, Ethiopia
 
Creator Alemayehu, Tadesse
McCartney, Matthew P.
Kebede, S.
 
Subject lakes
water resources development
evaluation
environmental effects
simulation models
decision support tools
water power
irrigation programs
water demand
 
Description Paper presented at the Conference on Applying Water Evaluation And Planning System (WEAP) as a Decision Support System (DSS) for IWRM, Damascus, Syria, 25-27 May 2009
Lake Tana is important for domestic water supply, hydropower, fisheries, grazing and water for livestock, as well as reeds for boat construction. It is also important for water transport and as a tourist destination. Currently, the water resources of the catchment are largely untapped. However, water resource development is being encouraged to stimulate economic growth and reduce poverty. In this study, the Water Evaluation And Planning (WEAP) model was used to determine the water availability for different irrigation and hydropower schemes proposed. Three development scenarios were simulated and the likely impact of future water resource development on lake water levels was assessed. For each scenario, the model was used to simulate water demand in three sectors (i.e. irrigation, hydropower and downstream environmental flows) over a 36-year period of varying flow and rainfall. The simulation results revealed that if all the planned development occurs on average 2,198 GWhy-1 power could be generated and 677 Mm3y-1 of water supplied to irrigation schemes. However, the mean annual water level of the lake would be lowered by 0.44 meters with a consequent decrease in the average surface area of the lake of 30 km2. As well as adverse ecological impacts this would have significant implications for shipping and the livelihoods of many local people.
 
Date 2009
2014-06-13T11:40:50Z
2014-06-13T11:40:50Z
 
Type Conference Paper
 
Identifier Alemayehu, Tadesse; McCartney, Matthew; Kebede, S. 2009. Modelling to evaluate the water resource implications of planned infrastructure development in the Lake Tana sub-basin, Ethiopia. Paper presented at the Conference on Applying Water Evaluation And Planning System (WEAP) as a Decision Support System (DSS) for IWRM, Damascus, Syria, 25-27 May 2009. 22p.
https://hdl.handle.net/10568/38162
https://publications.iwmi.org/pdf/H042207.pdf
 
Language en
 
Rights Open Access