In the olden days, people constructed step wells, ponds and wells. Now, dams are constructed. Why is it so?
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because in earlier days , people did not know about dams
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Major advances in concrete dam design were made from 1853 to 1910 by British and French engineers. During this time, understanding of the relationship between the precise weight and profile of gravity dams and the horizontal thrust of water increased extensively. In 1910, further advances were made as engineers began to take a more three dimensional approach to dam engineering, examining the effect of individual stresses and deflections on multiple points rather than on the structure as a whole. By recognizing the complexity of the structure and understanding its interconnectedness, engineers were able to make exponential advances in dam engineering. As a result of this enhanced understanding, model techniques were implemented at this time. Originally built in rubber, plaster, plasticine, or concrete, modelling is now also done digitally, allowing multi-faceted and comprehensive testing and examination of structural stability.
The world’s largest and most complex dams have all been built within the last century, due to engineering as well as technological advances. In addition to supplying water and controlling flooding, modern dams are often constructed to provide hydroelectric power. The Hoover Dam, a concrete arch-gravity dam constructed in the Black Canyon of the Colorado River in 1936, is a prime example of the major advances made in dam engineering. The massive dam, which impounds Lake Mead, stands a whopping 726 feet tall and has a reservoir capacity of 28,537,000 acre feet. It also provides four billion kilowatt-hours of hydroelectric power — enough to supply the private and public electrical needs of over eight million people in Nevada, Arizona, and California— each year. Once the tallest dam in the world, the Hoover Dam lost its title to Switzerland’s 820-foot-tall Mauvoisin Dam in 1957. In the United States, California’s Oroville Dam is now the tallest at 770 feet.
The world’s largest and most complex dams have all been built within the last century, due to engineering as well as technological advances. In addition to supplying water and controlling flooding, modern dams are often constructed to provide hydroelectric power. The Hoover Dam, a concrete arch-gravity dam constructed in the Black Canyon of the Colorado River in 1936, is a prime example of the major advances made in dam engineering. The massive dam, which impounds Lake Mead, stands a whopping 726 feet tall and has a reservoir capacity of 28,537,000 acre feet. It also provides four billion kilowatt-hours of hydroelectric power — enough to supply the private and public electrical needs of over eight million people in Nevada, Arizona, and California— each year. Once the tallest dam in the world, the Hoover Dam lost its title to Switzerland’s 820-foot-tall Mauvoisin Dam in 1957. In the United States, California’s Oroville Dam is now the tallest at 770 feet.
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