Gereb Bi’ati
Gereb Bi’ati is located in Ethiopia
Gereb Bi’ati
Gereb Bi’ati
Coordinates13°26′34″N 39°28′29″E / 13.44277614°N 39.4747198°E / 13.44277614; 39.4747198
TypeFreshwater artificial lake
Basin countriesEthiopia
Surface area0.17 km2 (0.066 sq mi)
Water volume1.005841×10^6 m3 (815.449 acre⋅ft)
Surface elevation2,140 m (7,020 ft)
SettlementsMekelle

Gereb Bi’ati is a reservoir located near Mekelle in the Tigray Region in Ethiopia. The earthen dam that holds the reservoir was built in 2000 by SAERT.[1]

Dam characteristics

  • Dam height: 17 metres
  • Dam crest length: 578 metres
  • Spillway width: 40 metres

Capacity

  • Original capacity: 1005841 m³
  • Dead storage: 232728 m³
  • Reservoir area: 17 ha
  • Designed irrigated area: 88 ha

Environment

The catchment of the reservoir is 9.71 km² large, with a perimeter of 14.24 km and a length of 4960 metres. Due to the possibility to by-pass sediment-laden water, the reservoir suffers from less rapid siltation.[2][3] The lithology of the catchment is Agula Shale and Mekelle Dolerite.[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. 1 2 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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