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Gereb Bi'ati

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Freshwater artificial lake in Ethiopia
Gereb Bi’ati
Gereb Bi’ati is located in EthiopiaGereb Bi’atiGereb 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 km (0.066 sq mi)
Water volume1.005841×10^ m (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.

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. The lithology of the catchment is Agula Shale and Mekelle Dolerite. 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

  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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