Addi Hilo

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.

Dam characteristics

 * Dam height: 11.4 metres
 * Dam crest length: 171 metres
 * Spillway width: 1 metre

Capacity
In 2002, the life expectancy of the reservoir (the duration before it is filled with sediment) was estimated at 9 years.
 * Original capacity: 108 806 m³
 * Dead storage: 4328 m³
 * Reservoir area: 2.5 ha

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. The lithology of the catchment is dominantly Agula shale and little Mekelle dolerite. 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.