Thursday, March 21, 2013

Rawal Lake

Rawal lake in Islamabad.
Rawal lake in Islamabad. (Photo credit: Wikipedia)
Rawal Lake (Urdu: جھیل راول‎) in Pakistan is an artificial reservoir that provides the water needs for the cities of Rawalpindi and Islamabad. 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. Rawal Lake is located within an isolated section of the Margalla Hills National Park.[1][2][3][4][5][6][7]
 
Recreation
The area around the lake has been planted with flowering trees and laid out with gardens, picnic spots, and secluded paths. The terraced garden and the lake are used for picnics, fishing and boating. The highest point in the garden offers a panoramic view of the lake, Margalla and Murree hills, Rawalpindi and Islamabad.
Boating, sailing, water skating and diving facilities are organized by private clubs.
To the west of the lake is the Islamabad Club, which offers different sporting facilities.

 Wildlife

The reservoir is of considerable importance for wintering waterfowl, especially Anas platyrhynchos.
Resident mammals include the common fox, Pangolin, Porcupine, Jungle cat, Jackal, Wild boar and yellow-throated marten.
Reptiles include indian cobra and Russell's viper.
It is a good place for birds watching, as the majority of Birds of Islamabad are found here.

 Fishery

There are 15 fish species belonging to 11 genera that present in Rawal Lake. The fish species in Rawal lake and its tributaries include: Doula (Channa channa), Rahu (Labeorohita), Thaila (Catla catla), Mori(Cirrhinus mrigala), Carp fish (Cyprinus carpio)and Talapia(Tilapia mossambica).[8]

  Features of Rawal Lake

 
  • Location: Islamabad Park Area
  • Longitude: 73° 7' E
  • Latitude: 33° 41' N
  • Catchments Area: 106.25 square miles (275 km²)

  Features of Rawal Lake dam

  • Type of dam: partly arched gravity dam (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)

[edit] Spillway

  • Type: Ogee gated structure
  • Discharge Capacity: 82000 ft³/s (2,300 m³/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 (58,600,000 m3)

 Canals

  • Left bank canal: length 5 miles (8.0 km)
    • Capacity: 40 ft³/s (1.1 m³/s)
  • Right bank canal: length 1.5 miles (2.4 km)
    • Capacity: 70 ft³/s (2.0 m³/s)

  Drinking water supply

 Command area

  • Agriculture: 500 acres (2.0 km2)

 References

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