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Grade 10 Geography Units 12 13 14 Essay - Effects of Dam Building Many people have already dammed a small stream using sticks and mud by the time they become adults Humans have used dams since early civilization because four-thousand years ago they became aware that floods and droughts affected their well-being and so they began to build dams to protect themselves from these effects1 The basic principles of dams still apply today as they did before a dam must prevent water from being passed Since then people have been continuing to build and perfect these structures not knowing the full intensity of their side effects The hindering effects of dams on humans and their environment heavily outweigh the beneficial ones The paragraphs below will prove that the construction and presence of dams always has and will continue to leave devastating effects on the environment around them Firstly to understand the thesis people must know what dams are A dam is a barrier built across a water course to hold back or control water flow Dams are classified as either storage diversion or detention As you could probably notice from its name storage dams are created to collect or hold water for periods of time when there is a surplus supply The water is then used when there is a lack of supply For example many small dams impound water in the spring for use in the summer dry months Storage dams also supply a water supply or an improved habitat for fish and wildlife they may store water for hydroelectricity as well2 A diversion dam is a generation of a commonly constructed dam which is built to provide sufficient water pressure for pushing water into ditches canals or other systems These dams which are normally shorter than storage dams are used for irrigation developments and for diversion the of water from a stream to a reservoir Diversion dams are mainly built to lessen
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