Gereb Shegal Explained

Gereb Shegal
Coords:	13.5877°N 39.4524°W
Type:	Freshwater artificial lake
Basin Countries:	Ethiopia
Area:	0.171km2
Volume:	1e6m3
Elevation:	1900m (6,200feet)
Pushpin Map:	Ethiopia
Pushpin Label Position:	right
Cities:	Romanat

Gereb Shegal is a reservoir located in the Inderta 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: 20 metres
• Dam crest length: 363 metres

Capacity

• Original capacity: 1000000 m³
• Reservoir area: 17.1 ha

Irrigation

• Designed irrigated area: 52 ha
• Actual irrigated area in 2002: 14 ha

Environment

The catchment of the reservoir is 8.67 km² large, with a perimeter of 12.12 km and a length of 4320 metres. The reservoir suffers from rapid siltation.^{[2] [3]} The lithology of the catchment is Mekelle Dolerite and Antalo Limestone.^[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]

Notes and References

1. Book: De Wit . Joke . Stuwmeren in Tigray (Noord-Ethiopië): kenmerken, sedimentatie en sediment-bronnen. Unpub. M.Sc. thesis . 2003 . Department of Geography, K.U.Leuven.
2. Nigussie Haregeweyn . and colleagues . Reservoirs in Tigray: characteristics and sediment deposition problems . Land Degradation and Development . 2006 . 17 . 211–230 . 10.1002/ldr.698 . 129834993 . free .
3. Book: Vanmaercke. M. and colleagues . Geo-trekking in Ethiopia's Tropical Mountains . Sediment Yield and Reservoir Siltation in Tigray . GeoGuide . 2019 . Springer Nature . Cham (CH) . 345–357. 10.1007/978-3-030-04955-3_23 . 978-3-030-04954-6 . 199112876 . https://link.springer.com/chapter/10.1007/978-3-030-04955-3_23.
4. Nigussie Haregeweyn . and colleagues . Sediment yield variability in Northern Ethiopia: A quantitative analysis of its controlling factors . Catena . 2008 . 75 . 1 . 65–76 . 10.1016/j.catena.2008.04.011 . 2008Caten..75...65H .