Gereb Bi'ati Explained
| Gereb Bi’ati |
| Coords: | 13.4428°N 39.4747°W |
| Type: | Freshwater artificial lake |
| Basin Countries: | Ethiopia |
| Area: | 0.17km2 |
| Volume: | 1.005841e6m3 |
| Elevation: | 2140m (7,020feet) |
| Pushpin Map: | Ethiopia |
| Pushpin Label Position: | right |
| Cities: | Mekelle |
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]
Notes and References
- 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.
- 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 .
- 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.
- 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 .
