Navigation Links
International team of scientists warns of climate change's impact on global river flow
Date:10/12/2007

A global analysis of the potential effect of climate change on river basins indicates that many rivers impacted by dams or extensive development will require significant management interventions to protect ecosystems and people, according to an article published today in the online version of Frontiers in Ecology and the Environment.

As a result of damming and development, major rivers worldwide have experienced dramatic changes in flow, reducing their natural ability to adjust to and absorb disturbances, said lead author Dr. Margaret Palmer, Director of the University of Maryland Center for Environmental Science Chesapeake Biological Laboratory. Given expected changes in global climate and water needs, this could lead to serious problems for both ecosystems and people.

In their analysis, the authors project river discharge under different climate and water withdrawal scenarios and combine this with data on the impact of dams on large river basins. The results are presented in global maps illustrating potential changes in discharge and water stress for dam-impacted and free-flowing basins.

The projections indicate that every populated basin in the world will experience changes in river discharge some are expected to have large increases in flood flows while other basins will experience water stress such that there is not enough water to meet human needs. For example, by the 2050s, mean annual river discharge is expected to increase by about 20 percent in the Potomac and Hudson River basins but to decrease by about 20 percent in Oregons Klamath River and Californias Sacramento River.

The magnitude of the changes is used to identify basins likely and almost certain to require proactive or reactive management intervention. The study also finds that nearly one billion people live in areas likely to require action and approximately 365 million people live in basins almost certain to require action.

Specific, proactive restoration, rehabilitation, and management actions are recommended to enhance the resilience of riverine ecosystems and minimize impacts. These efforts will minimize risks to ecosystems and people and may be less costly than reactive efforts taken only once problems have arisen. Proactive actions include stormwater and sediment management, channel reconfiguration, dam removal, land acquisition and riparian management.

This report calls attention to significant risks facing many of the worlds major rivers and those people who live near or depend on them for water or food, said Palmer. Many of these risks could be reduced dramatically if proactive management measures are implemented now. Its now up to the worlds political leaders to decide whether or not to step forward and put in place programs designed to minimize the impacts we may see on our ecosystems and people.


'/>"/>

Contact: Christopher Conner
cconner@umces.edu
443-496-0095
University of Maryland Center for Environmental Science
Source:Eurekalert

Related biology news :

1. International trial of two microbicides begins
2. International HapMap consortium expands mapping effort
3. Solutions that reduce death of marine life reeled in by International Smart Gear Competition
4. Canadian youth 4th highest in international obesity study
5. International Team Determines Geographic Origin of Leprosy
6. Team of international scientists departs today to discover the unknown in Chinas Himalayan region
7. Tropical dry forests receive international recognition
8. Open Source Biotechnology alliance for international agriculture
9. International HIV/AIDS trial finds continuous antiretroviral therapy superior to episodic therapy
10. Five surprising facts about starvation that could change the international agenda
11. CHAVI announces international search for genes affecting HIV response
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/15/2016)... , June 15, 2016 ... report titled "Gesture Recognition Market by Application Market - Global Industry ... - 2024". According to the report, the  global gesture ... in 2015 and is estimated to grow at ... billion by 2024.  Increasing application of ...
(Date:6/2/2016)... The Department of Transport Management (DOTM) of ... project, for the , Supply and Delivery of ... Infrastructure , to Decatur , ... Management Solutions. Numerous renowned international vendors participated in the tendering ... selected for the most compliant and innovative solution. The contract ...
(Date:5/20/2016)... , May 20, 2016  VoiceIt is ... partnership with VoicePass. By working together, ... experience.  Because VoiceIt and VoicePass take slightly different ... engines increases both security and usability. ... excitement about this new partnership. "This ...
Breaking Biology News(10 mins):
(Date:6/24/2016)... ... June 24, 2016 , ... While the majority of commercial spectrophotometers and ... and the 6000i models are higher end machines that use the more unconventional z-dimension ... light beam from the bottom of the cuvette holder. , FireflySci has developed ...
(Date:6/23/2016)... 23, 2016 /PRNewswire/ - FACIT has announced the ... biotechnology company, Propellon Therapeutics Inc. ("Propellon" or ... of a portfolio of first-in-class WDR5 inhibitors for ... as WDR5 represent an exciting class of therapies, ... medicine for cancer patients. Substantial advances have been ...
(Date:6/23/2016)... , June, 23, 2016  The Biodesign Challenge (BDC), ... new ways to harness living systems and biotechnology, announced ... (MoMA) in New York City . ... participating students, showcased projects at MoMA,s Celeste Bartos Theater ... Antonelli , MoMA,s senior curator of architecture and design, ...
(Date:6/23/2016)... LOUISVILLE, Ky. , June 23, 2016 /PRNewswire/ ... from two Phase 1 clinical trials of its ... double-blind, placebo-controlled, single and multiple ascending dose studies ... and pharmacodynamics (PD) of subcutaneous injection in healthy ... APL-2 subcutaneously (SC) either as a single dose ...
Breaking Biology Technology: