Featured Research

from universities, journals, and other organizations

Dams provide resilience to Columbia River basin from climate change impacts

Date:
September 25, 2013
Source:
Oregon State University
Summary:
Dams have been vilified for detrimental effects to water quality and fish passage, but a new study suggests that these structures provide "ecological and engineering resilience" to climate change in the Columbia River basin.

Dams have been vilified for detrimental effects to water quality and fish passage, but a new study suggests that these structures provide "ecological and engineering resilience" to climate change in the Columbia River basin.

The study, which was published in the Canadian journal Atmosphere-Ocean, looked at the effects of climate warming on stream flow in the headwaters and downstream reaches of seven sub-basins of the Columbia River from 1950 to 2010. The researchers found that the peak of the annual snowmelt runoff has shifted to a few days earlier, but the downstream impacts were negligible because reservoir management counteracts these effects.

"The dams are doing what they are supposed to do, which is to use engineering -- and management -- to buffer us from climate variability and climate warming," said Julia Jones, an Oregon State University hydrologist and co-author on the study. "The climate change signals that people have expected in stream flow haven't been evident in the Columbia River basin because of the dams and reservoir management. That may not be the case elsewhere, however."

The study is one of several published in a special edition of the journal, which examines the iconic river as the United States and Canada begin a formal 10-year review of the Columbia River water management treaty in 2014. The treaty expires in 2024.

Jones said the net effect of reservoir management is to reduce amplitude of water flow variance by containing water upstream during peak flows for flood control, or augmenting low flows in late summer. While authorized primarily for flood control, reservoir management also considers water release strategies for fish migration, hydropower, ship navigation and recreation.

These social forces, as well as climate change impacts, have the potential to create more variability in river flow, but the decades-long hydrograph chart of the Columbia River is stable because of the dams, said Jones, who is on the faculty of the College of Earth, Ocean, and Atmospheric Sciences at OSU.

"The climate change signal on stream flow that we would expect to see is apparent in the headwaters," she said, "but not downstream. Historically, flow management in the Columbia River basin has focused on the timing of water flows and so far, despite debates about reservoir management, water scarcity has not been as prominent an issue in the Columbia basin as it has elsewhere, such as the Klamath basin."

The study, which was funded by the National Science Foundation's support to the H.J. Andrews Experimental Forest, looked at seven sub-basins of the Columbia River, as well as the main stem of the Columbia. These river systems included the Bruneau, Entiat, Snake, Pend Oreille, Priest, Salmon and Willamette rivers.

"One of the advantages of having a long-term research programs like H.J. Andrews is that you have detailed measurements over long periods of time that can tell you a lot about how climate is changing," Jones pointed out. "In the case of the Columbia River -- especially downstream -- the impacts haven't been as daunting as some people initially feared because of the engineering component.

"Will that be the case in the future?" she added. "It's possible, but hard to predict. Whether we see a strong climate change signal producing water shortages in the Columbia River will depend on the interplay of social forces and climate change over the next several decades."


Story Source:

The above story is based on materials provided by Oregon State University. Note: Materials may be edited for content and length.


Journal Reference:

  1. Kendra L. Hatcher, Julia A. Jones. Climate and Streamflow Trends in the Columbia River Basin: Evidence for Ecological and Engineering Resilience to Climate Change. Atmosphere-Ocean, 2013; 51 (4): 436 DOI: 10.1080/07055900.2013.808167

Cite This Page:

Oregon State University. "Dams provide resilience to Columbia River basin from climate change impacts." ScienceDaily. ScienceDaily, 25 September 2013. <www.sciencedaily.com/releases/2013/09/130925132330.htm>.
Oregon State University. (2013, September 25). Dams provide resilience to Columbia River basin from climate change impacts. ScienceDaily. Retrieved August 29, 2014 from www.sciencedaily.com/releases/2013/09/130925132330.htm
Oregon State University. "Dams provide resilience to Columbia River basin from climate change impacts." ScienceDaily. www.sciencedaily.com/releases/2013/09/130925132330.htm (accessed August 29, 2014).

Share This




More Earth & Climate News

Friday, August 29, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Killer Amoeba Found in Louisiana Water System

Killer Amoeba Found in Louisiana Water System

AP (Aug. 28, 2014) State health officials say testing has confirmed the presence of a killer amoeba in a water system serving three St. John the Baptist Parish towns. (Aug. 28) Video provided by AP
Powered by NewsLook.com
Scientists Have Figured Out Why Rocks Move In Death Valley

Scientists Have Figured Out Why Rocks Move In Death Valley

Newsy (Aug. 28, 2014) The mystery of the moving rocks in Death Valley, California, has finally been solved. Scientists are pointing to a combo of water, ice and wind. Video provided by Newsy
Powered by NewsLook.com
Big Waves, Minor Flooding from Hurricane

Big Waves, Minor Flooding from Hurricane

AP (Aug. 27, 2014) Thundering surf spawned by Hurricane Marie pounded the Southern California coast Wednesday, causing minor flooding in a low-lying beach town. High surf warnings were posted for Los Angeles County south through Orange County. (Aug. 27) Video provided by AP
Powered by NewsLook.com
Calif. Quake Underscores Need for Early Warning

Calif. Quake Underscores Need for Early Warning

AP (Aug. 26, 2014) Researchers at UC Berkeley are testing a prototype of an earthquake early warning system that California is pursuing years after places like Mexico and Japan already have them up and running. (August 26) Video provided by AP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins