Google Play icon

Small dam construction to reduce greenhouse emissions is causing ecosystem disruption

Share
Posted June 20, 2013
This tributary of the Nu River in China is seen with its normal water flow. Credit: Kelly Kibler, courtesy of Oregon State University

This tributary of the Nu River in China is seen with its normal water flow. Credit: Kelly Kibler, courtesy of Oregon State University

Researchers conclude in a new report that a global push for small hydropower projects, supported by various nations and also the Kyoto Protocol to reduce greenhouse gas emissions, may cause unanticipated and potentially significant losses of habitat and biodiversity.

An underlying assumption that small hydropower systems pose fewer ecological concerns than large dams is not universally valid, scientists said in the report. A five-year study, one of the first of its type, concluded that for certain environmental impacts the cumulative damage caused by small dams is worse than their larger counterparts.

The findings were reported by scientists from Oregon State University in the journal Water Resources Research, in work supported by the National Science Foundation.

The conclusions were based on studies of the Nu River system in China but are relevant to national energy policies in many nations or regions – India, Turkey, Latin America – that seek to expand hydroelectric power generation. Hydropower is generally favored over coal in many developing areas because it uses a renewable resource and does not contribute to global warming. Also, the social and environmental problems caused by large dam projects have resulted in a recent trend toward increased construction of small dams.

“The Kyoto Protocol, under Clean Development Mechanism, is funding the construction of some of these small hydroelectric projects, with the goal of creating renewable energy that’s not based on fossil fuels,” said Desiree Tullos, an associate professor in the OSU Department of Biological and Ecological Engineering.

Read more at: Phys.org

Featured news from related categories:

Technology Org App
Google Play icon
85,974 science & technology articles

Most Popular Articles

  1. Universe is a Sphere and Not Flat After All According to a New Research (November 7, 2019)
  2. NASA Scientists Confirm Water Vapor on Europa (November 19, 2019)
  3. This Artificial Leaf Turns Atmospheric Carbon Dioxide Into Fuel (November 8, 2019)
  4. How Do We Colonize Ceres? (November 21, 2019)
  5. Scientists have Discovered a Place on Earth with no Biological Life (November 25, 2019)

Follow us

Facebook   Twitter   Pinterest   Tumblr   RSS   Newsletter via Email