Navigation Links
Sediment trapped behind dams makes them 'hot spots' for greenhouse gas emissions
Date:7/31/2013

With the "green" reputation of large hydroelectric dams already in question, scientists are reporting that millions of smaller dams on rivers around the world make an important contribution to the greenhouse gases linked to global climate change. Their study, showing that more methane than previously believed bubbles out of the water behind small dams, appears in ACS' journal Environmental Science & Technology.

Andreas Maeck and colleagues point out that the large reservoirs of water behind the world's 50,000 large dams are a known source of methane. Like carbon dioxide, methane is one of the greenhouse gases, which trap heat near Earth's surface and contribute to global warming. Methane, however, has a warming effect 25 times more powerful than carbon dioxide. The methane comes from organic matter in the sediments that accumulate behind dams.

That knowledge led to questions about hydroelectric power's image as a green and nonpolluting energy source. Maeck's team decided to take a look at methane releases from the water impoundments behind smaller dams that store water less than 50 feet deep.

They describe analysis of methane release from water impounded behind six small dams on a European river. "Our results suggest that sedimentation-driven methane emissions from dammed river hot spot sites can potentially increase global freshwater emissions by up to 7 percent," said the report. It noted that such emissions are likely to increase due to a boom in dam construction fostered by the quest for new energy sources and water shortages.


'/>"/>

Contact: Michael Bernstein
m_bernstein@acs.org
202-872-6042
American Chemical Society
Source:Eurekalert

Page: 1

Related biology news :

1. Tracking sediments fate in largest-ever dam removal
2. New tool for measuring frozen gas in ocean floor sediments
3. Measuring dispersal -- how well are soft-sediment invertebrate communities connected on the seafloor?
4. Geologist calls for advances in restoration sedimentology
5. Increased sediment and nutrients delivered to bay as Susquehanna reservoirs near sediment capacity
6. Coral reef thriving in sediment-laden waters
7. Oceanographers develop method for measuring the pace of life in deep sediments
8. Achilles heel: Popular drug-carrying nanoparticles get trapped in bloodstream
9. Chain reaction in the human immune system trapped in crystals
10. Running Website Run Research Junkie Launches to Analyze the Science Behind Running
11. Genes behind obesity mapped in large-scale study
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:12/5/2014)... PROVO, Utah , Dec. 4, 2014  Tute ... has raised $2.3 million in Series A1 funding led ... angel investors also participated in the investment round. ... as the healthcare community adopts next-generation sequencing and seeks ... disease," said Reid Robison , MD MBA, and ...
(Date:11/21/2014)... -- Earlier this year Donald Spector , Chairman of ... the most prolific inventors in the world, got a ... to third party agencies. Spector envisioned this technology even ... earliest known patents in this area. Now major technology ... care, elder care and hospital applications. This technology has ...
(Date:11/18/2014)... 17, 2014   News Highlights: ... to develop The Partners Data Lake, an agile ... Data Lake will allow researcher and clinicians to ... and the lives of patients , The ... activities across the Partners system, breaking down physical ...
Breaking Biology News(10 mins):Tute Genomics Raises $2.3 Million to Scale Up Cloud-Based Genome Analytics and Accelerate Personalized Medicine 2Tute Genomics Raises $2.3 Million to Scale Up Cloud-Based Genome Analytics and Accelerate Personalized Medicine 3Patented Biosensor Wearable Technology Provides a More Civilized Method of Quarantine 2Patented Biosensor Wearable Technology Provides a More Civilized Method of Quarantine 3Patented Biosensor Wearable Technology Provides a More Civilized Method of Quarantine 4Partners HealthCare and EMC Unite to Solve Health Care's Toughest Challenges Using Big Data 2Partners HealthCare and EMC Unite to Solve Health Care's Toughest Challenges Using Big Data 3Partners HealthCare and EMC Unite to Solve Health Care's Toughest Challenges Using Big Data 4Partners HealthCare and EMC Unite to Solve Health Care's Toughest Challenges Using Big Data 5
... Described as a hotspot of botanical diversity, there are ... Several thousand of them are used by traditional healers ... of problems from the common cold to serious diseases ... are will be the focus of The International Center ...
... owners have a new weapon in their pest management ... kills its host, has proven to be quite effective ... tiny pest-devouring insects are considered to be powerful "biocontrol ... management applications. Jean Pierre Kapongo, Ph.D., an entomologist ...
... when you,ve reached the top of a mountain and you ... to plants and animals, as their habitats slowly shift to ... is you can,t go anywhere. Habitats shrink to the vanishing ... to be played out repeatedly and at an accelerating rate ...
Cached Biology News:Study of African traditional medicine will begin world-first clinical trial 2Study of African traditional medicine will begin world-first clinical trial 3Stanford researchers say climate change will significantly increase impending bird extinctions 2Stanford researchers say climate change will significantly increase impending bird extinctions 3Stanford researchers say climate change will significantly increase impending bird extinctions 4
(Date:12/17/2014)... 2014 Gene synthesis and bioengineering ... entered into a technology access and services agreement ... DNA2.0’s proprietary protein engineering technology, known as “ProteinGPS®” ... are extremely excited that the global leader ADM ... proprietary bioengineering technology has now been validated through ...
(Date:12/17/2014)... -- Vermillion, Inc. (NASDAQ: VRML ), a bio-analytic ... next step in its expanded strategy to rebuild the ... naming of current Chief Operating Officer, Valerie Palmieri ... Chairman of the Board and CEO James LaFrance ... are effective January 1, 2015. "Jim and ...
(Date:12/17/2014)... Md. , Dec. 17, 2014 CASI ... company dedicated to the acquisition, development and commercialization of ... for the global market with a primary commercial focus ... it has been granted a Type C meeting with ... the meeting will be held in February 2015.  During ...
(Date:12/17/2014)... LEXINGTON, Mass. , Dec. 17, 2014   ... a biopharmaceutical company developing therapeutic products for rare disorders, ... Healthcare Conference being held in San Francisco, ... , President and Chief Executive Officer, will present on ... p.m. EST).  The presentation will be webcast live and ...
Breaking Biology Technology:ADM and DNA2.0 Enter Into Protein Engineering Technology Access and Service Agreement 2Vermillion Names Valerie Palmieri CEO; James LaFrance to continue as Chairman of Board 2Vermillion Names Valerie Palmieri CEO; James LaFrance to continue as Chairman of Board 3Vermillion Names Valerie Palmieri CEO; James LaFrance to continue as Chairman of Board 4CASI Pharmaceuticals Granted Type C Meeting With U.S. FDA For ENMD-2076 In Fibrolamellar Carcinoma 2CASI Pharmaceuticals Granted Type C Meeting With U.S. FDA For ENMD-2076 In Fibrolamellar Carcinoma 3CASI Pharmaceuticals Granted Type C Meeting With U.S. FDA For ENMD-2076 In Fibrolamellar Carcinoma 4CASI Pharmaceuticals Granted Type C Meeting With U.S. FDA For ENMD-2076 In Fibrolamellar Carcinoma 5
... (Nasdaq: NTII ), today announced it will release,its ... September,16, 2008., The Company will also host a ... year-end call are as follows:, -- Date: ... ET, 9:30 a.m. CT, 7:30 a.m. PT -- ...
... Heightened interest in therapeutic efficiency, quality and safety of food ... the biotechnology market. Biopharmaceuticals is poised to experience spiraling growth ... stream of products presently in the pipeline. , ... ...
... Sinovac Biotech Ltd. (Amex:,SVA), a leading provider of ... Anflu(R), a seasonal influenza vaccine, for 2008-2009 Flu ... only split influenza,vaccine produced without preservatives in China. ... its established sales force to,promote the adult dosage ...
Cached Biology Technology:Neurobiological Technologies Announces Dates for 2008 Fiscal Year End Financial Results Conference Call and Presentation at MCF Investor Summit 2Long-Term Investments Remain Critical to Biotechnology Industry Growth, According to a New Report by Global Industry Analysts 2Long-Term Investments Remain Critical to Biotechnology Industry Growth, According to a New Report by Global Industry Analysts 3Long-Term Investments Remain Critical to Biotechnology Industry Growth, According to a New Report by Global Industry Analysts 4Sinovac Launches Seasonal Influenza Vaccine Anflu(R) for 2008-2009 Flu Season 2Sinovac Launches Seasonal Influenza Vaccine Anflu(R) for 2008-2009 Flu Season 3
Request Info...
Invitrogen's Calcium Phosphate Transfection Kit provides high-quality reagents to enable the introduction of DNA into tissue culture cells via calcium phosphate co-precipitation....
Request Info...
...
Biology Products: