how are the large dams disturbing the environment
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Dams have both intended and unintended impacts, which can be positive or negative. It is unlikely to find intended negative impacts, though positive impacts can be both intended and unintended. Each of these types of impacts can be inevitable in their entirety, reducible or totally avoidable.
Wildlife losses: Apart from forests, the reservoir and the dam also affect other ecosystems and various fauna and flora species.
Impacts on cultivated biodiversity: Reservoirs also submerge productive agricultural land in the valley. This not only has a social and economic cost but also adversely affects cultivated biodiversity and a host of birds, insects, mammals and reptiles that have adapted to agricultural ecosystems.
Impacts on human health: For reservoirs in the tropical regions of the world, especially those that are below 1,000 m. elevation, there is a significant threat of vector breeding. Mosquitoes, which are carriers of malaria, filaria, dengue and other diseases breed in small pools of water created on the edges of the reservoir due to the lowering and raising of the water level of the reservoir.
Wildlife losses: Apart from forests, the reservoir and the dam also affect other ecosystems and various fauna and flora species.
Impacts on cultivated biodiversity: Reservoirs also submerge productive agricultural land in the valley. This not only has a social and economic cost but also adversely affects cultivated biodiversity and a host of birds, insects, mammals and reptiles that have adapted to agricultural ecosystems.
Impacts on human health: For reservoirs in the tropical regions of the world, especially those that are below 1,000 m. elevation, there is a significant threat of vector breeding. Mosquitoes, which are carriers of malaria, filaria, dengue and other diseases breed in small pools of water created on the edges of the reservoir due to the lowering and raising of the water level of the reservoir.
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