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The silting of dam reservoirs is the most challenging problem in Ethiopia. Sedimentation adversely affects the reservoir capacity. The loss of storage capacity is particularly felt in connection with energy production, water supply for domestic use, industry and agriculture, and in flood control. Sedimentation also affects the surface area of reservoir by reducing water depth and favoring development of aquatic growth, bottom outlets, gates and valves. These problems could be seen in different regions of the nation.Among many dams constructed to store water for irrigation and/or drinking purposes, Angereb reservoir constructed for drinking water of Gondar city has been losing its storage capacity due to sedimentation much in excess of its design capacity. This study was thus undertaken to analyze sediment yield from the Angereb Reservoir Watershed and to estimate the life of the reservoir so as to take appropriate measures that could reduce the rate of siltation. Moreover, the analysis will be helpful for professionals to applying the deployed models for similar watersheds.

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Admasu A.Woldegebriel,M.Sc: Soil and Water Engineering at Alemaya University, Senior Irrigation Engineer, National Programme Coordination and Management Unit, Ministry of Agriculture and Rural Development, Addis Ababa.

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