Oregon Water Science Center

Water Quality

Filter Total Items: 26
Date published: March 30, 2017
Status: Active

Lower Columbia River Dissolved Gas Monitoring Network

USGS total dissolved gas (TDG) data help guide spill and discharge management from dams operated along the lower Columbia River.

Contacts: Heather M Bragg
Date published: March 23, 2017
Status: Active

Contaminants Affecting Pacific Lamprey in the Columbia River

Pacific Lampreys (Entosphenus tridentatus) have lived in the Columbia River Basin for millenia and have great ecological and cultural importance. Lamprey populations in the Pacific Northwest and other parts of the world have declined dramatically in recent decades, probably owing to multiple causes. The role of habitat contamination in the declines has rarely been studied and was the main...

Date published: July 20, 2016
Status: Completed

Water Quality in Willow Creek Reservoir, Oregon

Blue-green algal blooms in the Willow Creek Reservoir may produce toxins that can be harmful to those that come in contact with them.

Contacts: Casie Smith
Date published: June 1, 2016
Status: Active

Future Water Clarity and Dissolved Oxygen in Crater Lake

Warming air temperature may change water temperature and water column mixing in Oregon’s Crater Lake over the next several decades, potentially impacting the clarity and health of the iconic lake.

Contacts: Tamara Wood
Date published: October 31, 2015
Status: Active

North Santiam River Basin Study

The streamflow and water-quality conditions monitored by the USGS in the North Santiam River basin provide valuable information to water resource managers

Date published: January 8, 2015
Status: Active

Nutrient and Sediment Loading to Upper Klamath Lake

The USGS employs state-of-the-science techniques to estimate nutrient and suspended-sediment loads to Upper Klamath Lake.

Contacts: Liam Schenk
Date published: January 8, 2015
Status: Completed

Nutrient Loading to Lost River and Klamath River Subbasins

The USGS has characterized nutrient concentrations in the Klamath River and Lost River drainages over multiple years, identified spatial and temporal patterns in nutrient and organic carbon concentrations, and quantified surface water nutrient loads entering and exiting the Klamath Project.

Contacts: Liam Schenk
Date published: October 10, 2014
Status: Completed

Umpqua River Basin Studies

The Wild and Scenic North Umpqua River is one of the highest-quality waters in the State of Oregon, supporting runs of wild salmon, steelhead, and trout. The USGS has been studying water-quality in the Umpqua River Basin since 1998.

Date published: October 5, 2014
Status: Active

Fall Creek Drawdown

Each autumn Fall Creek Lake is drawn down to allow endangered juvenile salmonids to pass freely through the dam. The drawdowns involve lowering the lake water level to the lake bed, creating a fluvial environment characterized by large amounts of sediment being transported through the dam and into Fall Creek and the Middle Fork Willamette River.

Date published: April 23, 2014
Status: Completed

Common Weed Killer is Widespread in the Environment

U.S. Geological Survey (USGS) scientists report that glyphosate, known commercially by many trade names, and its degradation product AMPA (aminomethylphosphonic acid) are transported off-site from agricultural and urban sources and occur widely in the environment. This study is the largest and most comprehensive assessment of the environmental occurrence of glyphosate and AMPA in the United...

Date published: October 31, 2013
Status: Active

Clackamas River Basin Water-Quality Assessment

Starting in 1997, the USGS began routinely studying water resources in the Clackamas River Basin. Whether it be assessing harmful algal blooms, runoff issues, streamflow, or watershed health, the USGS has worked with its partners to maintain one of Oregon's most beloved rivers.

Date published: October 5, 2012
Status: Completed

Assessing Mercury Loads in Cottage Grove Reservoir

Cottage Grove Reservoir is an impoundment of the Coast Fork of the Willamette River and is managed by the U.S. Army Corps of Engineers (USACE) as part of the Willamette Valley Flood Control Plan.  The reservoir is currently under a fish consumption advisory because of elevated levels of mercury in fish tissue observed in an Oregon Department of Environmental Quality sampling survey in 2003 (...

Contacts: Liam Schenk