Gereb Segen is a

reservoir A reservoir (; ) is an enlarged lake behind a dam, usually built to water storage, store fresh water, often doubling for hydroelectric power generation. Reservoirs are created by controlling a watercourse that drains an existing body of wa ...

located in the Hintalo Wajirat ''woreda'' of the

Tigray Region The Tigray Region (or simply Tigray; officially the Tigray National Regional State) is the northernmost Regions of Ethiopia, regional state in Ethiopia. The Tigray Region is the homeland of the Tigrayan, Irob people, Irob and Kunama people. I ...

Ethiopia Ethiopia, officially the Federal Democratic Republic of Ethiopia, is a landlocked country located in the Horn of Africa region of East Africa. It shares borders with Eritrea to the north, Djibouti to the northeast, Somalia to the east, Ken ...

. The earthen dam that holds the reservoir was built in 2000 by SAERT.

Dam characteristics

* Dam height: 14.86 metres * Dam crest length: 473 metres *

Spillway A spillway is a structure used to provide the controlled release of water downstream from a dam or levee, typically into the riverbed of the dammed river itself. In the United Kingdom, they may be known as overflow channels. Spillways ensure tha ...

width: 8 metres

Capacity

* Original capacity: 337408 m³ * Dead storage: 22400 m³ * Reservoir area: 11.7 ha 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

The catchment of the reservoir is 3.53 km² large, with a perimeter of 11.66 km and a length of 5200 metres. The reservoir suffers from rapid

siltation Siltation is water pollution caused by particulate terrestrial clastic material, with a particle size dominated by silt or clay. It refers both to the increased concentration of suspended sediments and to the increased accumulation (temporary o ...

. The lithology of the catchment is Agula Shale. Part of the water that could be used for irrigation is lost through

seepage In soil mechanics, seepage is the movement of water through soil. If fluid pressures in a soil deposit are uniformly increasing with depth according to u = \rho_w g z_w, where z_w is the depth below the water table, then hydrostatic conditions wi ...

; 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

{{reflist Reservoirs in Ethiopia 2000 establishments in Ethiopia Tigray Region Agriculture in Ethiopia Water in Ethiopia