What are the problems arising in the environmental impact assesment of hydro power projects?

To answer this question it is necessary to go back in the history of the hydraulic machines .

the first hydraulic mills were big wheels turning slowly . the water supply was a level canal catching one part of the water on the side of the river and going near the mill construction in a dam.This hydraulique mills had no bad impact on environment.

Later the evolution of technic changed the wheels and put a hydro power devise which used higher pressure and faster speed of water.This hydro power supply recieve the water by high pressure tube from a dam conctructed on the river. This second hydrolic power had i bad impact on environment on the river an and fishes.



The wheel mills are good and can be used with modern mechanical .



THe explanation is important to give the good comments to convince the project partners



To make more you can developp hydraulic power by applying the globale water management.



http://video.google.fr/videoplay?docid=-鈥?/a>What are the problems arising in the environmental impact assesment of hydro power projects?Hydro power projects mainly affects the Aquatic Ecosystem and

Land use pattern due to Dam and subsequently initiate the social issues.



Other issues are temporary and restricted during the construction phases only.What are the problems arising in the environmental impact assesment of hydro power projects?The major aquatic problems are changing the downstream temperature and flow problems (both seasonally and daily), blocking or modifying the migration pattern of fish past the power plant structure, injury to fish and other organisms passing through the turbines, and disruption of the spawning of fish and productivity of invertebrates downstream, elimination of flowing water upstream in the area of dam construction (if any) and so changing the habitat (including both temperature regime and current patterns) potentially changing the species composition.



Terrestrial impacts include the elimination of habitat in the area occupied by the power plant and continuing disruptions related to the operation of the power plant, supporting structures, road access and power transmission lines. If in a pristine area, the roads and transmission lines may increase access by humans not associated with the project and result in secondary impacts from their activities.What are the problems arising in the environmental impact assesment of hydro power projects?te so called important trees are getting destroyed