Gereb Mihiz

Gereb Mihiz 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.

Dam characteristics

Dam height: 17.5 metres
Dam crest length: 403 metres
Spillway width: 15 metres

Capacity

Original capacity: 1300000 m³
Dead storage: 325000 m³
Reservoir area: 30 ha

In 2002, the life expectancy of the reservoir was estimated at 21 years.

Irrigation

Designed irrigated area: 80 ha
Actual irrigated area in 2002: 38 ha

Environment

The catchment of the reservoir is 17.16 km² large, with a perimeter of 20.38 km and a length of 4910 metres. The reservoir suffers from rapid siltation. The lithology of the catchment is Mekelle Dolerite and Agula Shale. 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.