Gereb Mihiz
| Gereb Mihiz | |
|---|---|
 | |
  Gereb Mihiz | |
| Coordinates | 13°17′41″N 39°28′17″E / 13.29464441°N 39.47134646°E |
| Type | Freshwater artificial lake |
| Basin countries | Ethiopia |
| Surface area | 0.3 km2 (0.12 sq mi) |
| Water volume | 1.3×106 m3 (1,100 acre⋅ft) |
| Surface elevation | 2,110 m (6,920 ft) |
| Settlements | Hintalo |
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]
Dam characteristics
[edit]- Dam height: 17.5 metres
- Dam crest length: 403 metres
- Spillway width: 15 metres
Capacity
[edit]- Original capacity: 1300000 m³
- Dead storage: 325000 m³
- 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]
Irrigation
[edit]- Designed irrigated area: 80 ha
- Actual irrigated area in 2002: 38 ha
Environment
[edit]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
[edit]- ^ a b c De Wit, Joke (2003). Stuwmeren in Tigray (Noord-Ethiopië): kenmerken, sedimentatie en sediment-bronnen. Unpub. M.Sc. thesis. Department of Geography, K.U.Leuven.
- ^ 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.
- ^ 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 (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.