Dukan Dam - Characteristics of The Dam

Characteristics of The Dam

The Dukan Dam is a multi-purpose concrete arch dam abutted by gravity monoliths. It is 360 metres (1,180 ft) long and 116.5 metres (382 ft) high. At its base it is 32.5 metres (107 ft) wide, tapering off to 6.2 metres (20 ft) at the top. The combined maximum discharge of the dam is 4,300 cubic metres (150,000 cu ft) per second. This is divided over a spillway tunnel with three radial gates having a combined maximum discharge of 2,440 cubic metres (86,000 cu ft) per second, and an emergency bellmouth gloryhole spillway with a capacity of 1,860 cubic metres (66,000 cu ft) per second. Two irrigation outlets with a combined discharge of 220 cubic metres (7,800 cu ft) per second have not been operated over the last ten years. The powerhouse of five Francis units at 80 MW each releases between 110 and 550 cubic metres (3,900 and 19,000 cu ft) per second. Lake Dukan, the reservoir created by the Dukan Dam, has a surface area of 270 square kilometres (100 sq mi). Its anticipated capacity is 6.8 cubic kilometres (1.6 cu mi) with a maximum of 8.3 cubic kilometres (2.0 cu mi).