DAMS: GOOD OR BAD Introduction The unequal availability of resources leads to the development of methods to store them. Water as the prime resource for survival has been the determining factor for human settlements‚ been the sole reason for communities to thrive and for long formed the basis for wars. In locations where the appearance of rainfall is scanty and unreliable‚ the need to store water has given rise to the creation of ‘tankas’‚ creation of man-made lakes and similar reservoirs
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the word dam can be traced back to Middle English‚[1] and before that‚ from Middle Dutch‚ as seen in the names of many old cities.[2] Early dam building took place in Mesopotamia and the Middle East. Dams were used to control the water level‚ for Mesopotamia’s weather affected the Tigris and Euphrates rivers‚ and could be quite unpredictable. The earliest known dam is the Jawa Dam in Jordan‚ 100 kilometres (62 mi) northeast of the capital Amman. This gravity dam featured an originally 9 m (30 ft)
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DAMS [pic] INTRODUCTION A dam is a barrier that impounds water or underground streams. Dams generally serve the primary purpose of retaining water‚ while other structures such as floodgates or levees are used to manage or prevent water flow into specific land regions. Hydropower and pumped-storage hydroelectricity are often used in conjunction with dams to provide clean electricity for millions of consumers. It can also be used to collect water or for storage of water which can
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Kurobe Dam At 186 meters (610 ft.) high‚ it is the tallest dam in Japan. It was constructed between 1956 and 1963 at a cost of ¥51.3 billion yen. The project was a difficult engineering feat for the rapidly growing post–World War II Japan‚ and claimed the lives of 171 people. There are also 30‚000 suicides a year at this dam. The Kurobe Dam is the most popular hydropower site in Japan and‚ between late June and mid-October; water is released from its spillway for onlookers. The surrounding Kurobe
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A dam is a barrier that impounds water or underground streams. Dams generally serve the primary purpose of retaining water‚ while other structures such as floodgates or levees (also known as dikes) are used to manage or prevent water flow into specific land regions. Hydropower and pumped-storage hydroelectricity are often used in conjunction with dams to generate electricity. A dam can also be used to collect water or for storage of water which can be evenly distributed between locations.
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Dams of India have been built across many perennial rivers since the independence of India. These dams in India are a part of several multi-purpose projects to serve a variety of needs. In a multi-purpose project‚ a river forms a unit and a river valley is developed‚ by exploiting all the resources of the river. Basically‚ dams are built to harness the river water so that it can be utilised according to the needs. A multipurpose project is launched often for storing water for irrigation purposes
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building of the dam first proposed in 1919 and by whom? The dam was first proposed by Sun-Yat San‚ the father of modern China‚ in order to protect river communities from floods and also contribute for economic development plan for China. 2.Why have archaeologists and historians criticized the building of the Three Gorges Dam? Archeologist and historians criticize the building of the Three Gorges Dam because it is socially and environmentally destructive. This is because when the dam is finished
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DISADVANATGES: 1. Dams are extremely expensive to build and must be built to a very high standard. 2. The high cost of dam construction means that they must operate for many decades to become profitable. 3. The flooding of large areas of land means that the natural environment is destroyed. 4. People living in villages and towns that are in the valley to be flooded‚ must move out. This means that they lose their farms and businesses. In some countries‚ people are forcibly removed so that
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surrounding catchment areas was about 3‚700 cusecs. The dam also received about 570 cusecs from the Krishna Drinking Water Supply channel. Tiruvallur District Collector Pankaj Kumar Bansal and Government Chief Whip P.M. Narasimhan released the shutters of the link canal to allow 500 cusecs into the Red Hills reservoir. The shutters of Baby canal were opened to allow 90 cusecs into the Cholavaram reservoir. In the evening‚ all the rainwater received in the dam was released into the Kosasthalaiyar‚ officials
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Dams are among the oldest structures built by humans for collective use. A dam is a barrier that is constructed across a river or stream so the water can be held back or impounded to supply water for drinking or irrigation‚ to control flooding‚ and to generate power. The main kinds of dams are earth fill‚ rock fill‚ concrete gravity‚ concrete arch‚ and arch gravity. The last three types are all made of concrete‚ reinforced concrete‚ or masonry. (The term masonry can mean concrete‚ bricks‚ or blocks
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