Featured Research

from universities, journals, and other organizations

As A River Runs Through It, A Death Valley Stream Offers Insights Into Flooding And Climate Change

Date:
February 6, 2008
Source:
Boston College
Summary:
Death Valley's Furnace Creek Wash, diverted in 1941 to protect a village from flooding, has carved through the sandy hills and bedrock of Gower Gulch to reveal the forces original landscape and changing channel dynamics exert on the responses of diverted rivers and streams, according to new research.

Gower Gulch in the Amargosa Mountains, Death Valley National Park, California.
Credit: iStockphoto/Steve Geer

Death Valley may be known by its three superlatives: hottest, driest, and lowest – as in temperature, rainfall, and elevation in the United States. But it was the flow of water through the National Park that attracted Boston College Asst. Prof. of Geology and Geophysics Noah P. Snyder to the desert of eastern California.

In one of the few places where rivers do not flow to the sea, Snyder's research into a 1941 stream diversion in the historic park uncovered a rare glimpse into a range of geological changes that might otherwise take centuries to unfold but instead are revealed following the flashfloods that strike the park, located against the Nevada border.

Furnace Creek Wash, diverted to protect a village from flooding during infrequent but powerful rainstorms, has carved through Gower Gulch over the years. The way the creek cuts through the sandy hills highlights the effects original landscape and changing channel dynamics exert on the responses of diverted rivers and streams, according to research by Snyder, published in February edition of the journal Geology.

"This is an unusual opportunity to see how a river system responds to an extreme change in the historic rates of water and sediment flow," said Snyder, who co-authored the paper with former graduate student Lisa R. Kammer '05. "It's a hot topic in the earth sciences where we're interested in learning more about the interaction of climate change, tectonics and bedrock erosion."

In response to the diversion, Snyder found the Furnace Creek produced an unusual hybrid of consequences: at some points, the creek cuts into the land, leaving deep slices in the bedrock from the surge of flood waters brought on by as little as a half-inch to an inch of rain falling over the watershed that rolls out of the Funeral Mountains. At other points, where soft, sedimentary rocks sit below the surface, the creek has had a widening effect on its channel. These changes are brought on by periodic storms, not the steady flow of a routinely-fed creek or river, giving Snyder a chance to document this combination of effects at work.

Geologists have established models to predict the responses of channels, particularly bedrock rivers, Snyder said. Until he decided to investigate Gower Gulch, there had been few natural experiments to allow geologists to test and validate the models.

Snyder, who presented some of his findings in December at the annual meeting of the American Geophysical Union, specializes in river habitat restoration and lends his expertise to a number of dam removal projects throughout New England. He said he was drawn to Gower Gulch because of the unique opportunity to measure effects that mimic the impact of climate change on river flooding and erosion.

His research included a field study in the park in 2005, a review of aerial photographs taken between 1948 and 1995, as well as laser-guided elevation data provided by the National Center for Airborne Laser Mapping.

A geological wonder known for its searing summer-time temperatures, Death Valley sits nearly 300 feet below sea level, making it one of the few sites in the U.S. where rivers do not flow to the sea. A small dam and an opening blasted by engineers in 1941 now send Furnace Creek Wash rushing through Gower Gulch before emptying into the valley floor. Gower Gulch, dominated by sculpted sedimentary rock reminiscent of the rutted landscape of the Badlands of South Dakota, was photographed after the diversion by the late naturalist and photographer Ansel Adams.

The creek was diverted to prevent the flooding of a small village, but the National Park continues to sustain damage when heavy rains deluge the region. A flash flood in 2006 swept away vehicles, washed out roads and undermined visitor facilities at the Zabriskie Point look-out, according to park service reports.

Snyder said he does not expect any efforts to return Furnace Creek Wash to its original state because that would probably require relocation of the National Park Service village downstream. But the activity in Gower Gulch provides almost a time-lapse view into the effects of water flow. Under normal conditions, the effects of rivers and streams take eons to clearly manifest themselves in the land. But the man-made diversion, coupled with the intermittent flow of the creek through Gower Gulch has produced a microcosm of geological activity for Snyder and other scientists to observe, Snyder said.

"We would never see anything quite like this in New England, which certainly made this an interesting research project," Snyder said. "But given the climatic change that has been documented, the potential impact of that change on river floods, and the growing burden placed on waterways around the world, there's a value in better understanding the dynamics at play as rivers flow naturally or as a result of our intervention."


Story Source:

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


Cite This Page:

Boston College. "As A River Runs Through It, A Death Valley Stream Offers Insights Into Flooding And Climate Change." ScienceDaily. ScienceDaily, 6 February 2008. <www.sciencedaily.com/releases/2008/01/080130092039.htm>.
Boston College. (2008, February 6). As A River Runs Through It, A Death Valley Stream Offers Insights Into Flooding And Climate Change. ScienceDaily. Retrieved August 29, 2014 from www.sciencedaily.com/releases/2008/01/080130092039.htm
Boston College. "As A River Runs Through It, A Death Valley Stream Offers Insights Into Flooding And Climate Change." ScienceDaily. www.sciencedaily.com/releases/2008/01/080130092039.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