In 2002, the life expectancy of the reservoir (the duration before it is filled with sediment) was estimated at 25 years.
Irrigation
Designed irrigated area: 24 ha
Actual irrigated area in 2002: zero ha
Environment
Gereb Segen with catchment
The catchment of the reservoir is 3.53 km large, with a perimeter of 11.66 km and a length of 5200 metres. The reservoir suffers from rapid siltation. The lithology of the catchment is 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.
Homonymous places
There is a (much larger) dam with the same name, some 20 km to the northwest: Gereb Segen (May Gabat)
References
^ De Wit, Joke (2003). Stuwmeren in Tigray (Noord-Ethiopië): kenmerken, sedimentatie en sediment-bronnen. Unpub. M.Sc. thesis. Department of Geography, K.U.Leuven.
^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.