PAKISTAN ZINDABAD    Nov 22 , 2017
 
 
Human-made dams are important in our modern life

Date Published: May 10 , 2011

Rawal Lake in is an artificial reservoir that provides water to the cities of Rawalpindi and Islamabad.  The Korang River along with some other small streams coming from Margalla Hills have been set to form this artificial lake which covers an area of 8.8 km². Korang River is the outlet stream of Rawal Dam located within an isolated section of the Margalla Hills National Park. The area around the lake has been planted with trees and laid out with gardens, picnic spots, and secluded paths. The terraced garden and the lake are used for picnics, fishing and boating where as the highest point in the garden offers a panoramic view of the lake, Margalla and Murree hills, Rawalpindi and Islamabad.

Features of the Rawal Lake Dam

  • Type of dam: Partly arched gravity dam of stone masonry
  • Crest level: 1,742 ft (531 m)
  • Crest length: 700 ft (210 m)
  • Maximum height: 133.5 ft (40.7 m)

Saddle

  • Length 6,991 ft (2,131 m)
  • Height 24 ft (7.3 m)

Spillway

  • Type: Ogee gated structure
  • Discharge Capacity: 82000 ft³/s

Reservoir

  • Area: 3 square miles (7.8 km2)
  • Maximum depth: 102 feet (31 m)
  • Live storage: 43,000 acre-feet (53,000,000 m³)
  • Dead storage: 4,500 acre-feet (5,600,000 m³)
  • Gross capacity: 47,500 acre-feet (59,000,000 m³)

Canals

  • Left bank canal: length 5 miles and capacity 40 ft³/s
  • Right bank canal: length 1.5 miles and capacity 70 ft³/s

Drinking water supply

  • Rawalpindi: 19.5 million gallons/day
  • Islamabad: 2.5 million gallons/day

 

Information Source:  Wikipedia Encyclopaedia

 
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