Sediment Study in Bonneville Reservoir on the Columbia River
Researchers from CMGP in Menlo Park (Walter Barnhardt, Guy Gelfenbaum, Laura Kerr, and Mike Boyle) and
Woods Hole (Jane Denny and Chuck Worley) recently joined BRD colleagues (Darren Gallion, Jim Seelye) for a
three-week geophysical and sampling cruise on the Columbia River. The main objective was to study sediment
composition and distribution in Bonneville Reservoir.
USGS researchers mobilize a bottom sampler with underwater cameras on the R/V Estero, Bonneville Reservoir, Oregon.
The crew first collected a nearly complete, high-quality
sidescan-sonar mosaic from Bonneville Dam upstream to The Dalles, and then re-mobilized to collect bottom
samples and underwater photographs. These ground-truthed data are important for developing a sediment budget
for the Pacific Northwest coast and can be incorporated into habitat models that describe fishery dynamics in the
Note from the author: Don't let the word "reservoir" conjure up images of placid waters and gentle breezes.
One section of the Columbia River Gorge is known as "Swell City" for a reason: 40-kt winds are common in
August and blow upstream against a 5- to 6-kt current. The elements conspire to create short-period, steep
swells up to 10 ft high and spaced only 2 seconds apart. Such conditions, although a lure for wind surfers
worldwide, were tough on geologists in the 30-ft R/V Estero. Thanks to herculean efforts by the captain and
marine techs, all crewmembers and every piece of gear returned safely home.
in this issue:
Geophysical Survey of Hawaiian Coral Reefs
Sediment Study on the Columbia River
St. Petersburg Open Houses
Earth Science Week 2001
Woods Hole's First Annual Open House
Shark Festival and Sanctuary Celebration 2001
Metadata Workshop with Peter Schweitzer
Geochemistry Study Award
Richie Williams Speaks on Science and Religion
Farewell to Ardis Greatorex
Welcome to Chris Sherwood
USGS Mendenhall Post-doc Fellowship
Passing the Torch for Production of Sound Waves
New South Florida Ecosystem Sourcebook Released
November Publications List