amudu: The biggest dams in India

Thursday, June 7, 2012

The biggest dams in India

Hailed as the "Temples of Resurgent India" by Pandit Jawaharlal Nehru, the country's dams help provide water and electricity to millions citizens. We look at some of the biggest ones.

The Tehri Dam is a multi-purpose rock and earth-fill embankment dam on the Bhagirathi River near Tehri in Uttarakhand, India. It is the primary dam of the Tehri Hydro Development Corporation Ltd. and the Tehri hydroelectric complex. The dam is a 260 metres (850 ft) high rock and earth-fill embankment dam. Its length is 575 metres (1,886 ft), crest width 20 metres (66 ft), and base width 1,128 metres (3,701 ft). [Photo: By Arvind Iyer from Mumbai [CC-BY-SA-2.0 (http://creativecommons.org/ licenses/by-sa/2.0)], via Wikimedia Commons}

Kerala Government has long been demanding construction of a new dam in Mullaperiyar on the Kerala-Tamil Nadu border. Many believe that the existing 116-year-old dam could pose safety hazard.

While the matter rests with the apex court, we look at some of India’s biggest and most famous dams, hailed by Pandit Jawaharlal Nehru as ‘The Temples of a Resurgent India’.

Bhakra Dam is a concrete gravity dam across the Sutlej River, and is near the border between Punjab and Himachal Pradesh in northern India. The dam, located at a gorge near the (now submerged) upstream Bhakra village in Bilaspur district of Himachal Pradesh, is Asia's second highest at 225.55 m (740 ft) high next to the 261m Tehri Dam. The length of the dam (measured from the road above it) is 518.25 m; it is 9.1 m broad. Its reservoir, known as the "Gobind Sagar", stores up to 9.34 billion cubic meters of water, enough to drain the whole of Chandigarh, parts of Haryana, Punjab and Delhi.The 90 km long reservoir created by the Bhakra Dam is spread over an area of 168.35 km2. In terms of storage of water, it withholds the second largest reservoir in India, the first being Indira Sagar dam in Madhya Pradesh with capacity of 12.22 billion cu m.Nangal dam is another dam downstream of Bhakra dam. [Photo by KawalSingh at en.wikipedia (Transferred from en.wikipedia - Public domain from Wikimedia Commons]

Hirakud Dam is built across the Mahanadi River, about 15 km from Sambalpur in the state of Orissa in India. Built in 1957, the dam is one of the world's longest earthen dam. Hirakud Dam is the longest man-made dam in the world, about 16 mi (26 km) in length. It is one of the first major multipurpose river valley project started after India's independence. [Photo by Quarterbacker (Own work) [CC-BY-3.0 (http://creativecommons.org/ licenses/by/3.0)], via Wikimedia Commons]

Nagarjuna Sagar Dam is the world's largest masonry dam built across Krishna River in Nagarjuna Sagar, Nalgonda District of Andhra Pradesh, India, between 1955 and 1967. The dam contains the Nagarjuna Sagar reservoir with a capacity of up to 11,472 million cubic metres. The dam is 490 ft (150 m). tall and 1.6 km long with 26 gates which are 42 ft (13 m). wide and 45 ft (14 m). tall. Nagarjuna Sagar was the earliest in the series of large infrastructure projects initiated for the Green Revolution in India; it also is one of the earliest multi-purpose irrigation and hydro-electric projects in India.

The Sardar Sarovar Dam is a gravity dam on the Narmada River near Navagam, Gujarat, India. It is the largest dam and part of the Narmada Valley Project, a large hydraulic engineering project involving the construction of a series of large irrigation and hydroelectric multi-purpose dams on the Narmada River. The project took form in 1979 as part of a development scheme to increase irrigation and produce hydroelectricity. It is the 30th largest dams planned on river Narmada, Sardar Sarovar Dam (SSD) is the largest structure to be built. It has a proposed final height of 163 m (535 ft) from foundation. The dam is one of India's most controversial dam projects and its environmental impact and net costs and benefits are widely debated. The World Bank was initially a funder of the SSD, but withdrew in 1994. The Narmada Dam has been the centre of controversy and protest since the late 1980s. [Photo by AceFighter19 (Own work) [Public domain], via Wikimedia Commons]

The Indirasagar Dam is a multipurpose key project of Madhya Pradesh on the Narmada River at Narmadanagar in the Khandwa district of Madhya Pradesh in India. The Project envisages construction of a 92 m high and 653 m long concrete gravity dam. It provides Irrigation in 1,230 square kilometres of land with annual production of 2700 million units in the districts of Khandwa and Khargone in Madhya Pradesh and power generation of 1000 MW installed capacity (8x125). The reservoir of 12,200,000,000 m3 (9,890,701 acre•ft) was created. { By Nvvchar (Own work) [CC-BY-SA-3.0 (www.creativecommons.org/ licenses/by-sa/3.0) or GFDL (www.gnu.org/copyleft/fdl. html)], via Wikimedia Commons}

The Tungabhadra dam is constructed across the Tungabhadra River, a tributary of the Krishna River. The dam is located near the town of Hospet in Karnataka. The dam creates the biggest reservoir on the Tungabhadra River with 101 thousand million cubic feet (tmc) of gross storage capacity at full reservoir level (FRL) 498 m MSL, and a water spread area of 378 square kilometres. The dam is 49.5 meters high above its deepest foundation. {Photo by Amol.Gaitonde (Own work) [CC-BY-SA-3.0 (www.creativecommons.org/ licenses/by-sa/3.0)], via Wikimedia Commons}

The Bhavanisagar Dam and Reservoir, also called Lower Bhavani Dam, is located on the Bhavani River between Mettupalayam and Sathyamangalam in Erode District, Tamil Nadu, South India. The dam is situated around 16 km (9.9 mi) west to Satyamangalam and 35 km (22 mi) from Gobichettipalayam, 36 km (22 mi) north-east to Mettuppalayam and 70 km (43 mi) from Erode and 75 km (47 mi) from Coimbatore.

The dam is considered to be among the biggest earthen dams in the country. Bhavani Sagar dam is constructed on Bhavani River, which is merely under the union of Moyar River. The dam is used to divert water to the Lower Bhavani Project Canal.
{Photo by Rsrikanth05 (Own work) [CC-BY-SA-3.0 (http://creativecommons.org/ licenses/by-sa/3.0)], via Wikimedia Commons}

The Koyna Hydroelectric Project is the largest completed hydroelectric power plant of India It is a complex project consisting of total four dams with the largest Dam built on Koyna River known as Koyna Dam hence the name Koyna Hydroelectric project. The total Installed capacity of the project is 1,920 MW. The project consists of 4 stages of power generation. Due to the project's electricity generating potential the Koyna River is considered as the life line of Maharashtra.

The Idukki Dam, located in Kerala, India, is a 168.91 m (554 ft) tall arch dam. The dam stands between the two mountains - Kuravanmala (839) m and Kurathimala (925)m. It was constructed and is owned by the Kerala State Electricity Board. It supports a 780 MW hydroelectric power station.

It is built on the Periyar River, in the ravine between the Kuravan and Kurathi Hills in Kerala, India. At 167.68 metres, it is one of the highest arch dams in Asia and third tallest dam in India.

Photo by http://www.kseb.in/ [CC-BY- SA-2.5-in (http://creativecommons.org/ licenses/by-sa/2.5/in/deed.en) ], via Wikimedia Commons

Krishna Raja Sagara, also popularly known as KRS, is the name of both a lake and the dam that causes it.Sir. Mokshagundam Visvesvarayya served as the chief engineer during the construction of this dam. The dam is named for the then ruler of the Mysore Kingdom, Krishnaraja Wodeyar IV [Photo by Amarrg at the English language Wikipedia [GFDL (http://www.gnu.org/copyleft/ fdl.html) or CC-BY-SA-3.0 (http://creativecommons.org/ licenses/by-sa/3.0/)], from Wikimedia Commons]

The Mettur Dam is a large dam in India built in 1934.[1] It was constructed in a gorge, where the Kaveri River enters the plains. The dam is one of the oldest in India. The total length of the dam is 1,700 m (5,600 ft). [Photo by Praveen Kumar.R (Own work) [CC-BY-SA-3.0 (http://creativecommons.org/ licenses/by-sa/3.0)], via Wikimedia Commons]

The Srisailam Dam is a dam constructed across the Krishna River at Srisailam in the Kurnool district in the state of Andhra Pradesh in India and is the second largest capacity hydroelectric project in the country. The dam was constructed in a deep gorge in the Nallamala Hills, 300 m (980 ft) above sea level. It is 512 m (1,680 ft) long, 145 m (476 ft) high and has 12 radial crest gates. It has a reservoir of 800 km2 (310 sq mi). [Photo by Chintohere (Own work) [Public domain], via Wikimedia Commons]

The Banasura Sagar Dam is located 21 km from Kalpetta, in Wayanad District of Kerala in the Western Ghats. It is the largest earthen dam in India and the second largest in Asia. [Photo by Challiyan (Own work) [CC-BY-SA-3.0 (http://creativecommons.org/ licenses/by-sa/3.0)], via Wikimedia Commons]

Further more

After independence we have made lots of progress in Dam and water reservoirs, Now India is one of the world’s most prolific dam-builders. Around 4300 large dams already constructed and many more in the pipeline, Almost half of which are more than twenty years old. These dams are major attraction of tourists from all over India. Some facts about the Indian dams are: Tehri Dam is the eighth highest dam in the world. The Idukki dam is the first Indian arch dam in Periyar River Kerala and the largest arch dam in Asia. The Grand Anicut, Kallanai, located on Holy Cavery River in Tamil Nadu, is the oldest dam in the world. Indira Sagar Dam is the Largest Reservoir in India. These dams with the channel provides an ideal environment for wildlife.

Tehri Dam: Tehri Dam located on the Bhagirathi River, Uttaranchal Now become Uttarakhand. Tehri Dam is the highest dam in India,With a height of 261 meters and the eighth tallest dam in the world. The high rock and earth-fill embankment dam first phase was completed in 2006 and other two phases are under construction. The Dam water reservoir use for irrigation, municipal water supply and the generation of 1,000 MW of hydroelectricity.

Height: 260 meters
Length: 575 meters
Type: Earth and rock-fill
Reservoir Capacity: 2,100,000 acre·ft
River: Bhagirathi River
Location: Uttarakhand
Installed capacity: 1,000 MW

Bhakra Nangal Dam: Bhakra Nangal Dam is a gravity dam across the sutlej river Himachal Pradesh. Bhakra Nangal is the largest dam in India, with a height of 225 meters and second largest Dam in Asia. Its reservoir, known as the “Gobind Sagar Lake” it is the second largest reservoir in India, the first being Indira Sagar dam.

Height: 226 meters
Length: 520 meters
Type: Concrete gravity
Reservoir Capacity: 7,501,775 acre·ft
River: Sutlej River
Location: Punjab and Himachal Pradesh
Installed capacity: 1325 MW

Hirakud Dam: Hirakud dam built across the Mahanadi River in tribal state Orissa. Hirakud Dam is one of the longest dams in the world about 26 km in length. There are two observation towers on the dam one is “Gandhi Minar” and another one is “Nehru Minar”. The Hirakud Reservoir is 55 km long used as multipurpose scheme intended for flood control, irrigation and power generation. It was one of the major multipurpose river valley project after Independence.

Height: 60.96 meters
Length: 25.8 km
Type: Composite Dam
Reservoir Capacity: 4,779,965 acre·ft
River: Mahanadi River
Location: Orissa
Installed capacity: 307.5 MW

Nagarjunasagar Dam: Nagarjuna Sagar Dam is the world’s largest masonry dam with a height of 124 meters, built across Krishna River in Andhra Pradesh. Nagarjuna Sagar Dam is certainly the pride of India-considered the largest man-made lake in the world. The 1.6 km long with 26 gates dam was symbol of modern India’s architectural and technological triumphs over nature.

Height: 124 meters
Length:1,450 meters
Type: Masonry Dam
Reservoir Capacity: 9,371,845 acre·ft
River: Krishna River
Location: Andhra Pradesh
Installed capacity: 816 MW

Sardar Sarovar Dam: Sardar Sarovar Dam also known as “Narmada Dam” is the largest dam to be built, with a height of 163 meters, over the Sacred Narmada River in Gujarat. Drought prone areas of Kutch and Saurashtra will get irrigate by this project. The gravity dam is the largest dam of Narmada Valley Project with power facilities up to 200 MW. The dam is meant to benefit the 4 major states of India Gujarat, Madhya Pradesh, Maharashtra and Rajasthan.