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Paperback Environmental Fluid Mechanics - Méchanique des Fluides Environnementaux Book

ISBN: 1138491225

ISBN13: 9781138491229

Environmental Fluid Mechanics - Méchanique des Fluides Environnementaux

Dams are planned, constructed, and operated to meet human needs - generation of energy, irrigated agricultural production, flood control, public and industrial supply, supply of drinking water, and various other purposes. Dams impound water in reservoirs during times of high flood that can be used for human requirements during times with inadequate natural flows. Positive impacts of dams are improved flood control, improved welfare resulting from new access to irrigation and drinking water. Without dams there would be insufficient food to feed the world's people and energy would be generated by burning fossil fuels that produce greenhouse gases.
Despite this progress there remain significant concerns about the environmental impacts of dams. These environmental impacts are complex and far reaching, remote of the dam, and may occur in time with the dam construction or later and may lead to a loss of biodiversity and of productivity of natural resources.
This bulletin compiles improvements in knowledge and state of the art technology to avoid or mitigate environmental impacts of dams on the natural ecosystem as well as to the people that depend upon them for their livelihood and also addresses the mitigation of environmental impacts on dams and reservoirs.

Les barrages sont planifi s, construits et exploit s de mani re r pondre aux besoins humains. Les barrages retiennent l'eau dans les r servoirs pendant les p riodes de forte crue, une eau qui peut tre utilis e pour les besoins de l'homme pendant les p riodes d'insuffisance des d bits naturels. Les impacts positifs de barrages sont le contr le des crues et l'am lioration du bien- tre r sultant du nouvel acc s l'irrigation et l'eau potable. Sans barrages, la production alimentaire serait insuffisante pour nourrir la population du globe et l' nergie serait g n r e en br lant des combustibles fossiles qui produisent des gaz effet de serre.
Malgr ces progr s, d'importantes pr occupations subsistent quant aux retomb es des barrages sur l'environnement. Les impacts environnementaux sont complexes et d'une grande port e. Ils peuvent se produire au moment de la construction du barrage ou plus tard et peuvent entra ner une perte de la biodiversit et de la productivit des ressources naturelles.
Le pr sent bulletin compile l'am lioration des connaissances et des technologies les plus r centes pour viter ou att nuer les impacts environnementaux des barrages sur l' cosyst me naturel ainsi que pour les personnes qui en d pendent pour leur subsistance. Il aborde galement l'att nuation des impacts environnementaux sur les barrages et les r servoirs.

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