Navigation Links
Making dams safer for fish around the world
Date:4/14/2014

swirl, the fish suddenly finds itself back at its normal pressure.

Those sudden changes can have a catastrophic effect on fish, most of which are equipped with an organ known as a swim bladder like a balloon to maintain buoyancy at a desired depth. When the fish goes deeper and pressures are greater, the swim bladder shrinks; when the fish rises and pressure is reduced, the organ increases in size.

For some fish, the pressure shift means the swim bladder instantly expands four-fold or eight-fold, like an air bag that inflates suddenly. This rapid expansion can result in internal injuries or even death.

Factors at play include the specific path of a fish, the amount of water going through a turbine, the design of the turbine, the depth of water where the fish usually lives, and the physiology of the fish itself.

"To customize a power plant that is the safest for the fish, you must understand the species of fish in that particular river, their physiology, and the depth at which they normally reside, as well as the tremendous forces that the fish can be subjected to," said Brown.

PNNL scientists have found that trying to keep minimum pressure higher in all areas near the turbine is key for preventing barotrauma. That reduces the amount of pressure change a fish is exposed to and is a crucial component for any turbine that is truly "fish friendly." Preventing those extremely low pressures also protects a turbine from damage, reducing shutdowns and costly repairs.

Lower Mekong River Basin

Brown and PNNL colleague Zhiqun (Daniel) Deng have made several trips to work with scientists in Southeast Asia, where dozens of dams are planned along the Mekong River and its tributaries. The Mekong starts out high in Tibet and travels more than 2,700 miles, touching China, Myanmar, Laos, Thailand, Cambodia, and Vietnam. The team estimates more than 1,200 species of fish make their home in the Mekong, including th
'/>"/>

Contact: Tom Rickey
tom.rickey@pnnl.gov
509-375-3732
DOE/Pacific Northwest National Laboratory
Source:Eurekalert  

Page: 1 2 3 4 5

Related biology news :

1. Making memories: How 1 protein does it
2. Killer silk: Making silk fibers that kill anthrax and other microbes in minutes
3. Chemical engineers at UMass Amherst find high-yield method of making xylene from biomass
4. Copper making salmon prone to predators
5. Making healthy food affordable and appealing for low-income populations
6. Winemaking goes high-tech at the University of British Columbia
7. For gay couples, condom decision-making and condom use varies by race
8. Making sense out of the biological matrix of bipolar disorder
9. Making memories: Drexel researchers explore the anatomy of recollection
10. Making chocolate an affordable luxury
11. Are bacteria making you hungry?
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Making dams safer for fish around the world
(Date:8/31/2015)... Research and Markets ( http://www.researchandmarkets.com/research/st5b3m/saudi_arabia ) has ... Sensors Market - Growth, Trends & Forecasts (2014-2020)" ... Arabia Biomedical Sensors market is estimated at $0.23 billion ... period 2014-2020 The near future will bring ... of each individual. These sensors can be set to ...
(Date:8/24/2015)... -- Based on its recent analysis of the biometric products market, ... Company of the Year Award. DERMALOG is the leading German ... Africa . It has particularly gained prominence in ... of the largest biometric mass applications in the world, and ... of Nigeria with its biometric products. ...
(Date:8/18/2015)... N.J. , Aug. 18, 2015 /PRNewswire/ ... a key contributor to the Submission Content ... by IRISS, a non-profit forum. Dedicated to the ... provides a neutral platform for industry, vendors, ... share information and work towards a standard ...
Breaking Biology News(10 mins):Saudi Arabia Biomedical Sensors Market Report 2015 - Growth, Trends & Forecasts (2014-2020) 2Frost & Sullivan Applauds DERMALOG's Rise as the Supplier of Best-in-class Biometric Solutions in Africa 2Frost & Sullivan Applauds DERMALOG's Rise as the Supplier of Best-in-class Biometric Solutions in Africa 3Frost & Sullivan Applauds DERMALOG's Rise as the Supplier of Best-in-class Biometric Solutions in Africa 4Frost & Sullivan Applauds DERMALOG's Rise as the Supplier of Best-in-class Biometric Solutions in Africa 5Frost & Sullivan Applauds DERMALOG's Rise as the Supplier of Best-in-class Biometric Solutions in Africa 6Navitas, a Key Contributor in IRISS Forum Webinar 2Navitas, a Key Contributor in IRISS Forum Webinar 3
... rice cultivation built in the middle basin of the Guadiana ... migratory dabbling duck species to significantly increase in number during ... Vegas Altas del Guadiana is turned into a new Special ... are in decline and the loss of natural wetland is ...
... tend to think of ozone as something in the ... radiation. At the ground level, however, ozone is a ... a University of Illinois associate professor of crop sciences ... that establishing the exposure threshold for damage is critical ...
... tarantulas are known from a few tropical places in ... tarantulas generally have a lighter build, thinner bodies and longer ... area at the ends of their legs, allowing them to ... more agile. Their core area is the Amazon, from ...
Cached Biology News:Ducks flock to Extremadura thanks to its ricefields 2Ducks flock to Extremadura thanks to its ricefields 3Ozone's impact on soybean yield: Reducing future losses 2Ozone's impact on soybean yield: Reducing future losses 39 colorful and endangered tree-dwelling tarantulas discovered in Brazil 2
(Date:8/31/2015)...  For people with Down syndrome, news from ... company, located in the Science + Technology Park at ... therapies yet for people with Down syndrome and other chromosome ... syndrome and Edwards syndrome aneuploidies in human cell cultures, ... Elixirgen plans to develop this technology into a treatment ...
(Date:8/31/2015)... HAYWARD, Calif. and SHANGHAI ... Inc., a privately-held biopharmaceutical company developing next-generation antibiotics, ... Phase 2 clinical study for its lead drug ... designed to treat drug-resistant bacteria such as MRSA ... safer and better tolerated therapeutic option than currently ...
(Date:8/31/2015)... ... August 31, 2015 , ... Regulatory agencies ... the drug development approval process. Thus, innovator companies must understand what will be ... a Chicago-based CMO, has been hosting multiple educational panels and seminars for experts ...
(Date:8/30/2015)... August 31, 2015 , ...   für chirurgische   Behandlung     ...   werden für eine   verheerende   Geburtsverletzung behandelt ... und die Anzahl ausgebildeter Chirurgen in Kenia bis 2017 ... heute bekannt, dass  Action on Fistula  seit ihrem Beginn ...
Breaking Biology Technology:New Down syndrome therapy discovered 2MicuRX Reports Positive Top-Line Results In Phase 2 Clinical Trial For Novel Antibiotic MRX-I In Complicated Skin And Soft Tissue Infections 2Regis Shares Expert Advice on Impurities in Drug Development 2Regis Shares Expert Advice on Impurities in Drug Development 3Über 550 Frauen, deren Leben durch "Action on Fistula" transformiert wurde 2Über 550 Frauen, deren Leben durch "Action on Fistula" transformiert wurde 3Über 550 Frauen, deren Leben durch "Action on Fistula" transformiert wurde 4Über 550 Frauen, deren Leben durch "Action on Fistula" transformiert wurde 5
... Date: May 10, 2011 ... technology, media, telecommunications, life sciences, and clean technology companies in North ... What:   Nominations are now being accepted. Companies ... 2006 to 2010.  To be eligible for Deloitte,s Technology Fast 500 ...
... Brainlab has received 510(k) clearance from the U.S. ... radiosurgery planning solution. This innovative software package will ... existing Linac (linear accelerator) radiosurgery hardware and offer ... the need for costly hardware upgrades. ...
... The Laboratory Department for Probiotics Research at the ... YAMASHIRO Yuichiro et al.) studied supplementation of probiotic ... in elderly individuals living at a nursing home ... gastroenteritis. Analysis of fecal flora ...
Cached Biology Technology:Deloitte Seeks Nominations for 2011 Technology Fast 500™ Ranking 2Brainlab Announces FDA 510(k) Clearance for New HybridArc™ Software for Radiosurgery 2Brainlab Announces FDA 510(k) Clearance for New HybridArc™ Software for Radiosurgery 3Lactobacillus Beverage Confirmed to Reduce Fever Brought on by Acute Gastroenteritis Caused by Norovirus Infection 2Lactobacillus Beverage Confirmed to Reduce Fever Brought on by Acute Gastroenteritis Caused by Norovirus Infection 3
... mir Vana miRNA Bioarray Essentials Kit provides all ... post-hybridization washing of the mir Vana miRNA ... been labeled using Ambions mir Vana miRNA ... control miRNA (Bioarray ID BA10001) that should be ...
... Label IT siRNA Tracker Intracellular Localization Kit ... label and deliver siRNA, of your design, ... in vitro tracking experiments. Subcellular localization and ... be monitored following introduction of the labeled ...
... Intracellular Localization Kit provides a straight forward ... of your design, in an efficient yet ... Subcellular localization and functional inhibition of target ... of the labeled siRNA into mammalian cells. ...
... The Label IT siRNA Tracker ... Reagent provides a straight forward approach ... of your design, in an efficient ... tracking experiments. Subcellular localization and functional ...
Biology Products: