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Dams, Rivers and Climate Change

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Dams, Rivers and Climate Change Status of Rivers 54,000 large dams/diversions moderately/severely impact 60% rivers 500,000 km altered for navigation 90% sewage in ... – PowerPoint PPT presentation

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Title: Dams, Rivers and Climate Change


1
Dams, Rivers and Climate Change
2
Status of Rivers
  • gt54,000 large dams/diversions moderately/severely
    impact 60 rivers
  • gt 500,000 km altered for navigation
  • 90 sewage in developing countries untreated
  • Half the worlds wetlands destroyed
  • Watershed degradation, climate change disrupting
    flows
  • 37 freshwater fish species threatened,
    endangered or extinct
  • 40-80 million people displaced
  • 472 million suffer livelihood losses downstream

3
(No Transcript)
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How Do Dams Worsen the Climate Crisis?
  • Large dams are the wrong response because
  • River flows are increasingly unpredictable
  • Reduced generation drought and evaporation
  • Hydro 50 supply in 63 countries
  • Safety threatened by extreme floods
  • Dam reservoirs emit greenhouse gases
  • Tropical reservoirs are globally significant
    sources of methane
  • Healthy rivers are critical for supporting life
  • Big dams reduce water quality and quantity, dry
    up forests and wetlands, flood productive land,
    exacerbate biodiversity loss, and destroy
    fisheries.
  • Free-flowing rivers help trap carbon
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