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Aqushela
Freshwater artificial lake in Ethiopia From Wikipedia, the free encyclopedia
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Aqushela is a typical over-dimensioned reservoir located in the Tanqwa-Abergele woreda of the Tigray Region in Ethiopia. The earthen dam that holds the reservoir was built in 1999 by the Relief Society of Tigray.[1]
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Dam characteristics
- Dam height: 11.5 metres
- Dam crest length: 456 metres
- Spillway width: 16 metres
Capacity
- Original capacity: 810,000 m3
- Dead storage: 121,500 m3
- Reservoir area: 20.5 ha
These are the design values. In practice, the runoff from the catchment is largely insufficient to fill the reservoir, which serves only as shallow drinking pond for livestock.[1]
Irrigation
- Designed irrigated area: 50 ha
- Actual irrigated area in 2002: 0 ha
Environment
The catchment of the reservoir is 13.5 km2 large. The lithology of the catchment is Precambrian metamorphic rock.[1] Land use is strongly dependent on lithology: soils on metamorphic black limestone are used for cropping, while those on the schist and slate formations are under savannah woodland. Lands on the green-reddish-gray metamorphic banded marl formation are used for settlements. Most common soil types are:[2]
- in the metamorphic black limestone formation: Endoleptic Calcisol at the upper slope (plateau); Endoleptic Cambisol and Vertic Leptosol at the middle slope; Hypercalcic Calcisol at the footslopes and Grumic Vertisol at the lower slopes
- in the schist and slate formations: Leptosol both at the upper slope and at the foot slope positions; Regosol (Calcaric) over Hypercalcic Calcisol at the mid slope position and Fluvisol at the valley bottom
- in the green-reddish-gray metamorphosed banded marl: Leptic Calcisol at the upper slope, Haplic Calcisol at the foot slope, and Fluvisol at the valley bottom
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References
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