Addi Gela
| Addi Gela | |
|---|---|
 | |
  Addi Gela | |
| Coordinates | 13°07′45″N 39°30′36″E / 13.12925976°N 39.50988014°E |
| Type | Freshwater artificial lake |
| Basin countries | Ethiopia |
| Surface area | 0.185 km2 (0.071 sq mi) |
| Water volume | 1.25×106 m3 (1,010 acre⋅ft) |
| Surface elevation | 2,040 m (6,690 ft) |
| Settlements | Hiwane |
Addi Gela 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: 22 metres
- Dam crest length: 424 metres
- Spillway width: 14 metres
Capacity
[edit]- Original capacity: 1 250 000 m³
- Dead storage: 62 500 m³
- Reservoir area: 18.5 ha
In 2002, the life expectancy of the reservoir (the duration before it is filled with sediment) was estimated at 40 years.[1]
Irrigation
[edit]- Designed irrigated area: 100 ha
- Actual irrigated area in 2002: 6 ha
Environment
[edit]The catchment of the reservoir is 8.19 km2 large, with a perimeter of 13.43 km and a length of 5640 metres. The reservoir suffers from rapid siltation.[2] The lithology of the catchment is Agula Shale, Mekelle Dolerite, and sandstone of the Amba Aradam Formation.[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.[3]
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.
- ^ 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.