Mangla Dam Lake on Jhelum River, Pakistan33.1N 73.6E
The Mangla Dam, located in Pakistan’s Mirpur District, is the twelfth largest dam in the world. It was constructed in 1967 across the Jhelum River, about 67 miles (100 km) south-east of the Pakistani capital, Islamabad.
The dam created a reservoir known as the Mangla Dam Lake, with a capacity of 7,250 million cubic metres, visible below the mountains in this orthorectified image.
Until 1967, the entire irrigation system of Pakistan was fully dependent on unregulated flows of the Indus and its major tributaries. The agricultural yield was very low for a number of reasons, the most important being a lack of water during critical growing periods.
This problem stemmed from the seasonal variations in the river flow due to monsoons and the absence of storage reservoirs to conserve the vast amounts of surplus water during those periods of high river discharge.
The Mangla Dam was the first development project undertaken to reduce this shortcoming and strengthen the irrigation system. The project was designed primarily to increase the amount of water that could be used for irrigation from the flow of the Jhelum and its tributaries. Its secondary function was to generate electrical power from the irrigation releases at the artificial head of the reservoir. The project was not designed as a flood control structure, although some benefit in this respect also arises from its use for irrigation and water supply.