Betqua
| Betqua | |
|---|---|
 | |
  Betqua | |
| Coordinates | 13°19′29″N 39°20′07″E / 13.32473607°N 39.33529336°E |
| Type | Freshwater artificial lake |
| Basin countries | Ethiopia |
| Surface area | 0.137 km2 (0.053 sq mi) |
| Water volume | 0.666×106 m3 (540 acre⋅ft) |
| Surface elevation | 2,270 m (7,450 ft) |
| Settlements | Hintalo |
Betqua 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 1997 by SAERT.[1]
Dam characteristics
[edit]- Dam height: 16 metres
- Dam crest length: 284 metres
- Spillway width: 20 metres
Capacity
[edit]- Original capacity: 666 337 m³
- Dead storage: 133 267 m³
- Reservoir area: 13.7 ha
In 2002, the life expectancy of the reservoir (the duration before it is filled with sediment) was estimated at 23 years.[1]
Irrigation
[edit]- Designed irrigated area: 70 ha
- Actual irrigated area in 2002: 25 ha
Environment
[edit]The catchment of the reservoir is 1.52 km² large, with a perimeter of 4.82 km and a length of 1520 metres. The reservoir suffers from rapid siltation.[2] 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.[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.