When Sukkar Barrage was constructed in 1930s, this lake was formed.
Manchar Lake is fed by two canals, the Aral and the Danister from the river Indus. The lake collects water from numerous small streams in the Kirthar Mountains and empties into the Indus River.
There is not abundance of fish in the lake but how ever it provided a livelihood for a large number of fishermen. Fisher folk who depend on the freshwater fish they caught in this lake. The lake also provided large volumes of water for irrigation for various crops and aquatic plants including lotus.
Presently the large numbers of birds have fallen. It is because lake fish has reduced which the main food of birds is. Due to environmental degradation, the water is becoming saline and killing off the fish. The degradation has been occurring for a long time but recently the effects have been felt.