Dams play a major role in providing a proper structured outlet for water gushing out with great pressure around waterfalls and major rivers. Along with keeping the neighbouring cities safe from floods, it is also crucial for sending water and hydroelectric power to a lot of cities in its dire need. So, here is a list of the top 10 largest dams in the world 2018.
10. Robert-Bourassa Dam, Canada:
This dam is owned by Hydro-Québec and was constructed from 1974 to 1981. The Robert Bourassa Dam impounding the La Grande River in northern Quebec, Canada, creates the Robert-Bourassa Reservoir. It is the world’s tenth biggest dam and has a reservoir capacity of 61.7 billion cubic metres covering a surface area of 2,815 sq. kms.
9. Zeya Dam, Russia:
The Zeya Dam, built on the Zeya River in the Amur Oblast of Russia, north of the Chinese border, creates the Zeya reservoir with a storage capacity of 68.42 billion cubic metres, which is the ninth blargest dams based on reservoir capacity. The reservoir covers a surface area of 2,419 sq.km. The concrete gravity dam has an overall height of 112m, a crest length of 714.2m, and was constructed utilising 2.067 million cubic metres of concrete.The Zeya Dam is possessed by RusHydro and was constructed by Zeyagesstroy and Bureyagesstroy from 1964 to 1975. The dam’s power plant includes six generating units with a combined installed capacity of 1,290MW. The power plant features the world’s first adjustable-blade diagonal-flow turbines.
8. Krasnoyarsk Dam, Russia:
The world’s eighth largest dams is the Krasnoyarsk Dam, which impounds the Yenisey River and creates the Krasnoyarskoye reservoir with a storage capacity of 73.3 billion cubic metres. The reservoir covers a surface area of 2,000km2 and has a shoreline of approximately 1,560km. The concrete gravity dam is 124m high, 1,065m in length, and was constructed from1956 to 1972. It is designed with a flood discharge capacity of 20,400 cub.mt per second.
7. W.A.C Bennett Dam, Canada:
W.A.C Bennett Dam, constructed on the Peace River in British Columbia, Canada, creates the Williston lake. The dam ranks as the seventh largest dams with a storage capacity of approximately 74 billion cubic metres and covers a surface area of 1,773 sq.km. The earth fill embankment dam is operated by B.C Hydro, and has a height of 183m and crest length of 2,068m. The construction of the dam was commenced in 1961 and completed in 1967.
6. Aswan High Dam, Egypt:
The Aswan High Dam, which impounds the River Nile and creates Lake Nasser, is the sixth biggest dam based on water storage capacity. The dam’s reservoir, Lake Nasser, has a water storage capacity of 132 billion cubic metres. The rock-fill dam was designed by Institute Hydroproject of Russia in collaboration with various engineers from Egypt. It was constructed from 1960 to 1968 with an investment of approximately $1bn. The multipurpose dam serves the irrigation needs of both Egypt and Sudan, controls flooding, generates power, and helps in improving navigation across the Nile.
5. Guri Dam, Venezuela:
Guri, the world’s fifth biggest dam, has a storage capacity of 135 billion cubic metres and creates the Guri Lake covering 4,000km2. The concrete gravity and embankment dam measures 1,300m in length and 16m in height, and provides for 70% of the country’s electricity needs. It is operated by CVG Electrification del Caroni CA (Edelca).
4. Daniel Johnson Dam, Canada:
The Daniel Johnson Dam, also known as Manic 5 Dam, impounds the Manicouagan River that creates the Manicouagan Reservoir with a storage capacity of 139.8 billion cubic metres. The reservoir, having a surface area of 1,973km2, is the fourth biggest in the world.The dam is also touted as the world’s biggest hollowbody multiple-arch-and-buttress dam. It is 1,310.6m long and 213.97m high, and features 14 buttresses and 13 arches. It was constructed using 2.2 million cubic metres of concrete. The dam is owned by Hydro-Québec and was constructed from 1959 to 1968. The dam’s two power stations feature 12 units with a combined installed capacity of 2,660MW.
3. Akosombo Dam, Ghana:
Akosombo dam, located in Ghana, is the third biggest dam based on water storage capacity. Constructed on the Volta River, the dam creates the 8,500km2 Lake Volta, which is the world’s biggest reservoir by surface area. The lake impounds a mammoth 144 billion cubic metres of water.The rock-fill embankment dam has a crest length of about 700m and a height of 134m, and involved 12 million cubic metres of surface excavation. It was constructed from 1961 to 1966 primarily for the purpose of electricity generation, but also provides a livelihood for about 300,000 people through fisheries in the lake.
2. Bratsk Dam, Russia:
Bratsk Dam in Siberia, Russia, ranks as the second largest dams in the world thanks to its 169.27 billion cubic metres reservoir. The dam impounds the Angara River and the reservoir created by it covers a surface area of 5,540 sq.kmThe concrete gravity dam is owned by Irkutskenergo and was constructed from 1954 to 1964 by Bratskgesstroy.
1. Kariba Dam, Zimbabwe:
Kariba Dam is the world’s largest dams based on water storage capacity. Located at the former Kariwa (Kariba) Gorge, the dam creates Lake Kariba, which has a storage capacity of 185 billion cubic metres of water and a surface area of 5,580km2. The Lake Kariba covers a length of 280km and is 32km wide at its widest section. The double curvature concrete arch dam is owned by Zambezi River Authority and was constructed between 1955 and 1959 by Impresit of Italy. The dam is designed to avert a one in 10,000-year flood event.
This was the list of the top 10 largest dams in the world 2018 that have been built in view to serve the purposes of supplying water, and of course hydroelectric power, no doubt these dams play a major role in our lives. At least, these largest dams from the list surely do.