Washington Water Science Center

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Filter Total Items: 143
April 12, 2017

Using a Continuous Flow Centrifuge to Collect Suspended Sediment

Kathy Conn, a U.S. Geological Survey Water Quality Specialist, demonstrates a new USGS field method using a continuous flow centrifuge to collect suspended sediment from large volumes of water in the Duwamish River near Seattle Washington.
 

Scientist standing in streamgaging platform hanging over a river.
March 23, 2017

Measuring the Colville River at Kettle Falls, WA

USGS Hydrologic Technician Kim Cesal measuring 3170 cfs at 12409000 Colville River at Kettle Falls, WA. This measurement is the highest made at the gaging site. The gage has been in operation since October 1922. The gage was installed to monitor flows from Meyer Falls Dam and Power Generation.

Image: Elwha River Mouth
March 14, 2016

Elwha River Mouth

Aerial photo by Tom Roorda of the mouth of the Elwha River near Port Angeles, Wash. 

Image: Elwha River Salmon
March 14, 2016

Elwha River Salmon

A female Chinook salmon, among the first wave of fish to recolonize waters that haven't had salmon in 100 years, excavates a nest inside Olympic National Park. 

Centrifuge Bowl Containing River Suspended Sediment
February 5, 2015

Centrifuge Bowl Containing River Suspended Sediment for Analysis

A U.S. Geological Survey hydrologist holds a centrifuge bowl containing river suspended sediment for analysis of metals and organic chemicals. The sample was collected using a new in-field continuous-flow centrifugation technique to separate and collect suspended sediment from large volumes of water. The sample was collected on the Duwamish River, Washington in cooperation

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Image: Elwha Crane Aerial Photo
September 26, 2012

Elwha Crane Aerial Photo

This Sept. 26, 2012 image from a USGS unmanned aircraft shows the demolition of Glines Dam and Lake Mills on the Elwha River in Olympic National Park, Wash. 

 

Image: Low-flow Discharge Measurement, Elwha River, Washington
June 20, 2012

Low-flow Discharge Measurement, Elwha River, Washington

USGS research ecologist Jeff Duda collects discharge data on a side channel of the Elwha River. Two large dams on the Elwha River are being incrementally removed from 2011 to 2013 to restore river function in an important salmon-bearing river. During early stages of the removal project, hundreds of thousands of tons of fine-grained sediment (mostly silts and sands),

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View from the sky looking inland at a river mouth that is flowing into open waters heavily laden with sediment in contrast.
April 14, 2012

Turbid Coastal Plume of the Elwha River, Washington

The turbid waters of the Elwha River and the coastal waters of the Strait of Juan de Fuca mix directly offshore of the river mouth, forming a large coastal plume.  This plume is easily identified by the cloudiness of the water (or "turbidity") resulting from sediment discharged by the river.  Two large dams on the Elwha River are being incrementally removed from 2011 to

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View from the sky looking seaward over a river mouth that is dumping large volumes of sediment and creating a delta.
April 14, 2012

Turbid Coastal Plume of the Elwha River, Washington

The turbid waters of the Elwha River and the coastal waters of the Strait of Juan de Fuca mix directly offshore of the river mouth, forming a large coastal plume.  This plume is easily identified by the cloudiness of the water (or "turbidity") resulting from sediment discharged by the river.  Two large dams on the Elwha River were incrementally removed from 2011 to 2014 to

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Image: Retrieving Sediment Instrumentation, Elwha River, Washington
April 2, 2012

Retrieving Sediment Instrumentation, Elwha River, Washington

USGS researchers Chris Curran and Raegan Huffman retrieve instrumentation to measure sediment concentration from the Elwha River, Washington. Two large dams on the Elwha River are being incrementally removed from 2011 to 2013 to restore river function in an important salmon-bearing river. The USGS is sampling sediment from the river during the dam-removal project to

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Image: Operating Sediment-sampling Reel, Elwha River, Washington
January 5, 2012

Operating Sediment-sampling Reel, Elwha River, Washington

USGS hydrologic technician James Foreman operates an electronic deployment reel from a bridge over the Elwha River, Washington. Two large dams on the Elwha River are being incrementally removed from 2011 to 2013 to restore river function in an important salmon-bearing river. The USGS is sampling sediment from the river during the dam-removal project to quantify the

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