Energia Hidrualica
Autor: Rafael Ruviaro. | Publicado: 2011-11-28T10:32:00-08:00

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A energia hidráulica ou energia hídrica é a energia obtida a partir da energia de uma massa de água (energia renovável). A forma na qual ela se manifesta na natureza é nos fluxos de água, como rios e lagos e pode ser aproveitada por meio de um desnível ou uma queda de água.Normalmente constroem-se diques que param o curso da água acumulando-a num reservatório a que se chama barragem. Noutros casos, existem diques que não param o curso natural da água, mas obriga-a a passar pela turbina de forma a produzir electricidade.
Vantagens:A energia é produzida a partir de uma fonte contínua, neste caso, o      movimento da água;
Não polui o meio ambiente;
É de baixo custo de produção
Desvantagens:A constução de centrais hidroeléctricas geralmente exige a formação      de grandes reservatórios de água, o que provoca profundas alterações nos      ecossitemas;
  Dependendo do tipo de relevo e da região onde se encontra o      empreendimento, as hidroeléctricas podem tembém ocasionar o alargamento de      terras e o descolamento de populações ribeirinhas.            Fonte:http://www.abcdaenergia.com/enervivas/cap06.htm   http://maisenergiasrenovaveis.blogspot.com/2009/03/energia-hidraulica-o-que-e.html   http://pensamentopararenovar.blogspot.com/2008/12/energia-hidrulica-e-as-suas-vantagens-e.html