Gereb Mihiz

Gereb Mihiz is a reservoir located in the Hintalo Wajirat woreda of the Tigray Region in Ethiopia. The earthen dam that holds the reservoir was built in 1998 by SAERT.[1]

Gereb Mihiz
Gereb Mihiz is located in Ethiopia
Gereb Mihiz
Gereb Mihiz
Coordinates13.29464441°N 39.47134646°E / 13.29464441; 39.47134646
TypeFreshwater artificial lake
Basin countriesEthiopia
Surface area0.3 km2 (0.12 sq mi)
Water volume1.3×10^6 m3 (1,100 acre⋅ft)
Surface elevation2,110 m (6,920 ft)
SettlementsHintalo

Dam characteristics

  • Dam height: 17.5 metres
  • Dam crest length: 403 metres
  • Spillway width: 15 metres

Capacity

  • Original capacity: 1300000 
  • Dead storage: 325000 
  • Reservoir area: 30 ha

In 2002, the life expectancy of the reservoir (the duration before it is filled with sediment) was estimated at 21 years.[1]

Gereb Mihiz

Irrigation

  • Designed irrigated area: 80 ha
  • Actual irrigated area in 2002: 38 ha

Environment

The catchment of the reservoir is 17.16 km² large, with a perimeter of 20.38 km and a length of 4910 metres. The reservoir suffers from rapid siltation.[2][3] The lithology of the catchment is Mekelle Dolerite and Agula Shale.[1] 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.[4]

References

  1. De Wit, Joke (2003). Stuwmeren in Tigray (Noord-Ethiopië): kenmerken, sedimentatie en sediment-bronnen. Unpub. M.Sc. thesis. Department of Geography, K.U.Leuven.
  2. 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.
  3. 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.
  4. 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.
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