Why build a dam?
Water supply and energy
There are various reasons for damming a river. The most obvious is to create a more reliable water supply for a town or city. In a country where rainfall can be variable (and is often seasonal), having a ready supply of water is essential. Dams also provide water for irrigation, to grow crops and run livestock, in drier areas.
Rivers can also be dammed to generate hydro-electricity. This was the main reason behind the proposal to dam the Franklin River. Supporters argued that the dam would provide clean energy for Tasmania, create jobs and encourage economic growth.
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