This in turn changes sediment and nutrient regimes and alters water temperature and chemistry, … ... impact of building dams on these rivers. PDF | Dams built on rivers, serve as artificial lake that impounds huge amount of water. Dams have had such an impact on the world that more than half of the world’s major rivers had dams constructed on them by the end of the 20th Century [1]. dams on ecosystems are profound, complex, varied, multiple and mostly negative. Key Words: biodiversity, ecosystems, environmental protection, large dams Introduction The Murray The Nile River River The Gordon River Three Gorges Dam.
Landslides have occurred in nearby regions, thought to be triggered by changes in water level in the dam. These benefits were not includ… A prerequisite for successful environmental protection is that dams are managed within the specific environmental, social and economic context of the catchment in which they are situated. The reservoir can also be a source of water to animals and plants in the adjoining areas and, where such areas have become unnaturally dry, this can be a significant environmental benefit. impact on the environment and the safety of people living near it. INTRODUCTION By storing or diverting water dams alter the natural distribution and timing of stream flows. 3. Key Words: Dam, environment, ecology, water resources. The creation of a reservoir provides a habitat for wetland species, especially water birds. In this paper the environmental impact assessment of the Gotvand hydro-electrical dam has been evaluated in the three environment elements, biological, Physical-chemical and cultural units. portant to minimize the negative effects of dams on the environment regarding sus-tainable development.The mentioned effects and their solutions have taken into account in the environmental impact assesment concept. Strategies to protect the environment are described. IMPACTS OF DAMS ON RIVERS. Dams alter aquatic ecology and river hydrology upstream and downstream, affecting water quality, quantity and breeding grounds (Helland-Hansen et al., 1995).They create novel and artificial types of aquatic environment for the life span of the dam. Academia.edu is a platform for academics to share research papers.