Oregon Water Science Center

Water Quality

Filter Total Items: 26
Date published: January 24, 2020
Status: Active

Fernhill Natural Treatment Wetlands

The amount and type of algae in the Tualatin River affect the river’s water quality and ecological health, as well as its value as a recreational resource. As a relatively new source of summertime flow to the upper Tualatin River, discharges from the Fernhill Natural Treatment System (NTS) have the potential to enhance or degrade downstream water quality. Discharges of low nutrient...

Contacts: Erin Poor
Date published: November 26, 2018
Status: Active

Synthesizing the State of Science of Coldwater Refuges in the Willamette River Basin

Many regulatory, management, and conservation organizations are interested in protecting and increasing coldwater refuges and thermal diversity for Chinook salmon, steelhead, and other natives fishes in the Willamette River basin. This study synthesizes current and emerging science related to coldwater refuges and thermal diversity. It is also develops conceptual frameworks for understanding...

Contacts: Krista Jones
Date published: January 23, 2018
Status: Active

SPARROW Model Assessments of Nutrients and Suspended Sediment in the Pacific Northwest and California

SPARROW can be used to relate water-quality data to landscape characteristics, such as natural properties and human activities

Contacts: Daniel R Wise
Date published: November 30, 2017
Status: Active

Effects of Highway Runoff on Water Quality

"SELDM facilitates analysis by providing precipitation, pre-storm streamflow, and other variables by region or from hydrologically similar sites."

Date published: November 2, 2017
Status: Active

Water Quality in the Willamette River at Portland, Oregon

The U.S. Geological Survey (USGS) has been monitoring water quality in the Willamette River for many years. The USGS National Water-Quality Assessment Program (NAWQA) collects water samples from the Willamette River at Portland, as well as from select sites upstream, as part of a continuing effort to assess the quality of the Nation's waters. The USGS Oregon Water Science Center has multiple...

Contacts: Stewart Rounds
Date published: August 22, 2017
Status: Active

Willamette River Studies

Welcome to the Willamette River Study page. Here you will find links to USGS research for the Willamette River and the Willamette River Basin.

Date published: May 18, 2017
Status: Completed

Water Temperature Modeling in the Middle Fork Willamette and South Santiam River Basins

Hills Creek, Lookout Point, and Dexter Dams are located on the Middle Fork Willamette River upstream of Eugene in western Oregon, and are important resources managed by the U.S. Army Corps of Engineers (USACE) for flood control, hydroelectric power, recreation, navigation, and irrigation. On the South Santiam River east of Albany in western Oregon, Green Peter and Foster Dams provide functions...

Contacts: Stewart Rounds
Date published: May 11, 2017
Status: Completed

Henry Hagg Lake Water-Quality Model

Henry Hagg Lake is a reservoir located in the foothills of the eastern slope of the Coast Range Mountains of northwestern Oregon. The lake is used for recreation in the summer and flood control in the winter.

Contacts: Stewart Rounds
Date published: May 11, 2017
Status: Active

Tualatin River Basin Water Quality Assessment

In 1990, the USGS began assessing water-quality in the Tualatin River. Almost 30 years later, we are still monitoring conditions in the basin.

Date published: May 9, 2017
Status: Active

Water Quality in Keno Reach of the Klamath River

The Klamath River from Link River to Keno Dam experiences poor water-quality conditions on a seasonal basis, creating inhospitable conditions for fish and other aquatic organisms. These problems led the Oregon Department of Environmental Quality to prepare a Total Maximum Daily Load (TMDL) plan to bring the river into compliance with water-quality standards. This study uses a hydrodynamic and...

Contacts: Annett Sullivan
Date published: April 6, 2017

A Thermal Mosaic for the Willamette River

The U.S. Army Corps of Engineers operates 12 dams in the Willamette River Basin. The dams alter natural temperature and hydrologic regimes. Unnatural water temperatures can negatively impact all life stages of salmonid fish species. Water temperature in the mainstem Willamette River regularly exceeds the standard of 18.0 °C (64.4 °F) designated for salmon and trout rearing and migration for...

Date published: March 31, 2017
Status: Completed

Columbia River Contaminants and Habitat Characterization Study

Fish, wildlife, and human populations along the lower Columbia River are exposed to an ever-growing variety of contaminants as a result of increasing urbanization, industrialization, and agricultural development.