Addi Amharay
Addi Amharay is a reservoir located in the Inderta woreda of the Tigray Region in Ethiopia. The earthen dam that holds the reservoir was built in 1997 by SAERT.
Dam characteristics
- Dam height: 14.7 metres
- Dam crest length: 128 metres
- Spillway width: 17 metres
Capacity
- Original capacity: 957,000 m³
- Dead storage: 175,000 m³
- Reservoir area: 31.5 ha
In 2001, the life expectancy of the reservoir before it is filled with sediment was estimated at only 33 years.
Irrigation
- Designed irrigated area: 60 ha
- Actual irrigated area in 2001: 5 ha
Environment
The catchment of the reservoir is 4.92 km, with a perimeter of 9.62 km and a length of 3560 metres. The reservoir suffers from rapid siltation. The lithology of the catchment is Antalo Limestone and Agula shale. Part of the water that could be used for irrigation is lost through seepage; the positive side-effect is that this contributes to groundwater recharge.
References
- ^ De Wit, Joke (2003). Stuwmeren in Tigray (Noord-Ethiopië): kenmerken, sedimentatie en sediment-bronnen. Unpub. M.Sc. thesis. Department of Geography, K.U.Leuven.
- ^ Vanmaercke, M. and colleagues (2019). "Sediment Yield and Reservoir Siltation in Tigray". Geo-trekking in Ethiopia's Tropical Mountains. GeoGuide. Cham (CH): Springer Nature. pp. 345–357. doi:10.1007/978-3-030-04955-3_23. ISBN 978-3-030-04954-6. S2CID 199112876.
- ^ Nigussie Haregeweyn, and colleagues (2006). "Reservoirs in Tigray: characteristics and sediment deposition problems". Land Degradation and Development. 17: 211–230. doi:10.1002/ldr.698. S2CID 129834993.
- ^ Nigussie Haregeweyn, and colleagues (2008). "Sediment yield variability in Northern Ethiopia: A quantitative analysis of its controlling factors". Catena. 75 (1): 65–76. Bibcode:2008Caten..75...65H. doi:10.1016/j.catena.2008.04.011.