Rivers must flow: The case against big dams

Photo retrieved from: www.aljazeera.com

“More than 50,000 large dams now choke about two-thirds of the world’s largest rivers. The consequences of this massive engineering programme have been devastating. Large dams have wiped out species; flooded huge areas of wetlands, forests and farmlands; displaced tens of millions of people, and affected close to half a billion people living downstream.

Large dams hold back not just water, but silt and nutrients that replenish farmlands and build protective wetlands and beaches. Dams change the very riverness of our waterways, in ways we can’t always see, but that the earth can certainly feel.

Of all the complex and interconnected environmental disruptions that dams inflict on the landscape, the most obvious is the permanent inundation of forests, wetlands and wildlife. Reservoirs have flooded vast areas - at last count, the world’s dams had flooded an area bigger than the United Kingdom.

Equally important is the quality of these lost lands: river and floodplain habitats are some of the world’s most diverse ecosystems. Plants and animals that are closely adapted to valley habitats often cannot survive along the edge of a reservoir.”

Read more: Aljazeera

 

 

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