Addi Hilo

Addi Hilo
Photograph of the reservoir with a hill in the background
Addi Hilo is located in Ethiopia
Addi Hilo
Addi Hilo
Coordinates13°26′34″N 39°34′00″E / 13.44277616°N 39.56654435°E / 13.44277616; 39.56654435
TypeFreshwater artificial lake
Basin countriesEthiopia
Surface area0.025 km2 (0.0097 sq mi)
Water volume0.108806×10^6 m3 (88.210 acre⋅ft)
Surface elevation2,310 m (7,580 ft)
SettlementsKwiha

Addi Hilo 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: 11.4 metres
  • Dam crest length: 171 metres
  • Spillway width: 1 metre

Capacity

  • Original capacity: 108 806 m³
  • Dead storage: 4328 m³
  • Reservoir area: 2.5 ha

In 2002, the life expectancy of the reservoir (the duration before it is filled with sediment) was estimated at 9 years.[1]

Irrigation

  • Designed irrigated area: 9 ha
  • Actual irrigated area in 2002: 9 ha

Environment

The catchment of the reservoir is 0.72 km² large, with a perimeter of 3.34 km and a length of 1210 metres. The reservoir suffers from rapid siltation.[2] The lithology of the catchment is dominantly Agula shale and little 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

  1. ^ 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.
  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. S2CID 129834993.
  3. ^ 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.