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Organization

Idaho Water Science Center
Idaho Water Science Center
https://www.usgs.gov/centers/id-water

Location
230 Collins Road
Boise , ID 83702
USA
Parent Organization: Office of the Northwest - Pacific Islands Regional Director
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Weighted Regressions on Time, Discharge and Season (WRTDS) and WRTDS with Kalman filtering (WRTDS_K) models were developed for total and dissolved cadmium, zinc and lead; total phosphorus and nitrogen; and dissolved orthophosphate at twelve sites in the Spokane River watershed, northern Idaho, for water years 1990 to 2018. The data table contains the annual mean concentrations and annual total loads estimated by WRTDS_K, and the flow-normalized annual mean concentrations and flow-normalized annual total loads estimated by WRTDS for each modeled site and constituent.
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From 2008 to 2012, the U.S. Geological Survey, in cooperation with the U.S. Army Corps of Engineers, Walla Walla District, developed an acoustic backscatter surrogate (model 1.0) for estimating real-time suspended-sediment concentration and loads at Clearwater River at Spalding, ID (USGS ID: 13342500) using a horizontally-mounted 3000kHz acoustic Doppler velocity meter (ADVM). This study is a continuation of the 2008 to 2012 acoustic backscatter surrogate study using samples collected since 2015 to validate the continued use of model 1.0. Sample data collected in 2015 to 2018 show a deviation from model 1.0 when backscatter data from the ADVM, after correction for acoustic losses, is greater than 65.7 decibels....
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