Gereb Mihiz

Gereb Mihiz
Gereb Mihiz
	Gereb Mihiz
Coordinates	13°17′41″N 39°28′17″E / 13.29464441°N 39.47134646°ECoordinates: 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[]

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

Capacity[]

Original capacity: 1300000 m³
: 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]

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[]

^ ^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.
^ 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.
^ Nigussie Haregeweyn, and colleagues (2008). "Sediment yield variability in Northern Ethiopia: A quantitative analysis of its controlling factors". Catena. 75: 65–76. doi:10.1016/j.catena.2008.04.011.

[joke-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.

[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.

[4] Nigussie Haregeweyn, and colleagues (2008). "Sediment yield variability in Northern Ethiopia: A quantitative analysis of its controlling factors". Catena. 75: 65–76. doi:10.1016/j.catena.2008.04.011.

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