Oregon Water Science Center

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Filter Total Items: 39
Date published: September 1, 2021

USGS uses watershed modeling to assess surface-water nutrient impairment across the Pacific Northwest and California

The region-wide, reach-scale results from a new study provide two new tools that might help water-quality managers. One is an estimate of the total contribution from point and diffuse sources to the loads delivered to nutrient-impaired water bodies. The other is a method to assess potential nutrient impairment based on estimated warm-weather dissolved oxygen and pH conditions. 

Date published: June 14, 2021

USGS Releases Groundwater-Level Contour Maps for the Harney Basin, Oregon

Groundwater-level contour maps from a groundwater-availability study of the Harney Basin are now available. These results are important for understanding the status of groundwater resources in the basin and how they might respond to future demand.

Date published: June 14, 2021

PSU-USGS study improves the understanding of how pesticides are transported within Oregon coastal watersheds

The results from this study provide insights into the effectiveness of current forest management practices in controlling the transport of forest-use pesticides.

Date published: April 16, 2021

A Momentous Anniversary for USGS Continuous Water-Quality Monitoring in Oregon

May 7th, 2021 will mark 30 years of continuous water-quality monitoring in the Tualatin River for the USGS Oregon Water Science Center.

Date published: January 5, 2021

USGS Measures the Effect of Recent Wildfires on Water Quality in Oregon

Some of the intense wildfires that occurred during late summer of 2020 in Oregon happened along streams that were being monitored by the USGS. As a result, the USGS was able to measure how water-quality was affected by those wildfires.

Date published: December 1, 2020

"Legacy nitrogen" contributing to upward nitrate trends in streams

Despite the tremendous effort invested in reducing the use of nitrogen, widespread decreases in nitrate loads in US rivers and streams remain elusive—what gives? A new study from the USGS provides more evidence that the culprit is the slow release to streams of nitrogen that has accumulated in groundwater and other...

Date published: November 6, 2020

Potential Burrowing Habitat for Lamprey Larvae in the Umpqua River Basin, Oregon

Lampreys in the Umpqua River basin face multiple threats, including predation by nonnative fish such as smallmouth bass.

Date published: October 6, 2020

Expanding our knowledge of Willamette River fish habitat

USGS scientists are providing important information about off-channel features of the Willamette River, which provide habitat for many fish species including salmonids. This information will fill gaps in the data needed to effectively manage the Willamette River system.

Date published: September 28, 2020

Surface-water nutrient and sediment mappers are now available

SPARROW mappers are interactive tools that allow users to evaluate streamflow and nutrient and sediment conditions as well as the importance of different sources of contaminants in a selected river basin. Data can be visualized at different scales using maps and interactive graphs and tables.

Date published: September 23, 2020

USGS Responds to Oregon Wildfires

On Labor Day, September 7, 2020, dry conditions combined with unusually strong summer winds resulted in several fires in western and southern Oregon. These fires have caused property damage and fatalities.

Date published: May 12, 2020

USGS Responds to Spring Flooding

U.S. Geological Survey field crews are measuring flooding across the country as spring weather is in full swing. Warming temperatures, increased precipitation and snowmelt have caused moderate to major flooding in the upper Midwest, East Coast, Central Plains and the Southeast portions of the country.