Addi Amharay

Addi Amharay
Addi Amharay
	Addi Amharay
Coordinates	13°24′18″N 39°34′24″E / 13.40500132°N 39.5733461°E
Type	Reservoir
Basin countries	Ethiopia
Surface area	0.315 km2 (0.122 sq mi)
Water volume	0.957×106 m3 (776 acre⋅ft)
Surface elevation	2,320 m (7,610 ft)
Settlements	Kwiha

Addi Amharay is a reservoir located in the Inderta woreda of the Tigray Region in Ethiopia. The earthen dam that holds the reservoir was built in 1997 by SAERT.^[1]

Dam characteristics

Dam height: 14.7 metres
Dam crest length: 128 metres
Spillway width: 17 metres

Capacity

Original capacity: 957,000 m³
Dead storage: 175,000 m³
Reservoir area: 31.5 ha

In 2001, the life expectancy of the reservoir before it is filled with sediment was estimated at only 33 years.^[1]

Irrigation

Designed irrigated area: 60 ha
Actual irrigated area in 2001: 5 ha

Environment

The catchment of the reservoir is 4.92 km², with a perimeter of 9.62 km and a length of 3560 metres. The reservoir suffers from rapid siltation.^[2] ^[3] The lithology of the catchment is Antalo Limestone and Agula shale.^[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]

References

^ ^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.
^ Vanmaercke, M. and colleagues (2019). "Sediment Yield and Reservoir Siltation in Tigray". Geo-trekking in Ethiopia's Tropical Mountains. GeoGuide. Cham (CH): Springer Nature. pp. 345–357. doi:10.1007/978-3-030-04955-3_23. ISBN 978-3-030-04954-6. S2CID 199112876.
^ 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.

[joke-1] 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] Vanmaercke, M. and colleagues (2019). "Sediment Yield and Reservoir Siltation in Tigray". Geo-trekking in Ethiopia's Tropical Mountains. GeoGuide. Cham (CH): Springer Nature. pp. 345–357. doi:10.1007/978-3-030-04955-3_23. ISBN 978-3-030-04954-6. S2CID 199112876.

[3] 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.

[4] 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.

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