Koyna Dam Explained

Koyna Dam
कोयना धरण
Name Official:Koyna Dam D05104
Dam Crosses:Koyna River
Location:Koyna Nagar, Maharashtra
India
Dam Type:Rubble-concrete dam
Dam Length:807.20NaN0 (0.8 km)
Dam Height:103.20NaN0
Spillway Count:6 Gates
Construction Began:1956
Opening:1964[1]
Owner:Government of Maharashtra
Res Name:Shivasagar Lake
Res Capacity Total:2981000000m2 OR 105.27 tmc ft
Res Surface:891.780NaN0
Plant Turbines:Koyna dam foot powerhouse: 2 x 20 MW
stage 1: 4 x 70 MW
stage 2: 4 x 75 MW
stage 3: 4 x 80 MW
stage 4: 4 x 250 MW
Total = 18 Francis turbines
Plant Capacity:1,960 MW
Location Map:India Maharashtra
Location Map Caption:Location of Koyna Dam in Maharashtra
Coordinates:17.4017°N 73.7522°W

The Koyna Dam is one of the largest dams in Maharashtra, India. It is a rubble-concrete dam constructed on Koyna River which rises in Mahabaleshwar, a hillstation in Sahyadri ranges. It is located in Koyna Nagar, Satara district, in the Western Ghats on the state highway between Chiplun (44 KM) and Karad (58 KM).

Details

The main purpose of the dam is hydroelectricity with some irrigation in neighboring areas. Today the Koyna Hydroelectric Project is the second largest completed hydroelectric power plant in India[2] having a total installed capacity of . Due to its electricity generating potential, Koyna river is considered as the 'life line of Maharashtra'.[3]

The spillway of the dam is located at the center. It has 6 radial gates. The dam plays a vital role of flood controlling in monsoon season. The catchment area dams the Koyna river and forms the Shivasagar Lake which is approximately 50km (30miles) in length. It is one of the largest civil engineering projects commissioned after Indian independence. The Koyna hydro-electric project is run by the Maharashtra State Electricity Board.

The dam has withstood many earthquakes in the recent past, including the devastating 1967 Koynanagar earthquake, resulting in the dam developing some cracks. After the disaster grouting of the cracks was done. Also internal holes were drilled to relieve the hydrostatic pressures in the body of the dam. Indian scientific establishment has formulated an ambitious project to drill a deep borehole in the region and intensely study the earthquake activity. This would help in better understanding and possible forecast of earthquakes. The proposal is to drill up to 7 km and study the physical, geological and chemical processes and properties of the reservoir triggered earthquake zone in real time. It would be an international project to be led by Indian scientists.[4]

In 1973 the non-overflow portion of the dam was strengthened, followed by strengthening the spillway section in 2006. Now the dam is expected to be safe against any future earthquake, including ones with a higher intensity than that of 1967.

See also

External links

Notes and References

  1. Web site: Koyna D05104 . 1 March 2013 . https://web.archive.org/web/20131202233544/http://india-wris.nrsc.gov.in/wrpinfo/index.php?title=Koyna_D05104 . 2 December 2013 . dead .
  2. Web site: Electricity in India - Sources, Generation, Usage of Power in india. india-reports.com.
  3. Web site: Koyna Sanctuary Plundered. 14 November 2011. downtoearth.org.in. 31 January 2011.
  4. News: Major project to study earthquake activity at Koyna. The Hindu Business Line. 21 March 2011. 18 January 2020.