Idaho Water Science Center

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Filter Total Items: 74
Date published: September 30, 2020

WRTDS bootstrapped concentration and load trend likelihoods for sites in the Spokane River watershed, water years 1990 to 2018

Weighted Regression on Time, Discharge and Season (WRTDS) models were developed for total and dissolved cadmium, lead and zinc; total phosphorus and nitrogen; and dissolved orthophosphate at twelve sites in the Spokane River watershed for water years 1990 to 2018. Bootstrapped model replicates were run to determine the statistical likelihoods of trends in flow-normalized concentration

Date published: September 30, 2020

Annual mean concentrations and annual total loads from WRTDS and WRTDS_K models for sites in the Spokane River watershed, water years 1990 to 2018

Weighted Regression 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

Date published: September 15, 2020

2. Duckweed and epiphyte growth stimulation testing

Nutrient limitation tests were performed with a laboratory bioassay that uses a macrophyte, Lemna minor L. (duckweed) and attached epiphytes to characterize the status of ambient and nutrient-enriched waters. In summary, we measured morphological (number of fronds, longest surface axis, root length) and population-level (number of plants, dry mass) responses of L. minor,

Date published: September 15, 2020

3. Algal accrual on nutrient diffusing substrates (NDS)

We used in situ nutrient diffusing artificial substrates (NDS) to test for nutrient limitation of benthic algae. Concentrated nutrients are enclosed in vials with diffusive fritted glass tops, which allow nutrients contained in an agar gel to slowly leach through the substrates. Periphyton accumulates on diffusive surfaces when NDS are deployed in natural waters, and differences in accu

Date published: September 15, 2020

1. Green algae growth stimulation testing

Algal growth potential tests using the green algae Raphidocelis subcapitata (=Pseudokirchneriella subcapitata = Selenastrum capricornutum) were performed on ambient waters collected from 6 Idaho streams from September 7 to 21, 2007. Tests were conducted by a contract laboratory, GEI/Chadwick Ecological Division, Littleton, Colorado.

Date published: August 20, 2020

Microplastics in 29 Great Lakes tributaries (2014-15)

This dataset describes the quantity and morphology of floating microplastics in 29 Great Lakes tributaries in 6 states. Samples were collected in spring 2014 – spring 2015. Each tributary was sampled three to four times, capturing low-flow and runoff-event conditions. Sampling and analysis methods are described in the .xml metadata file. These data are interpreted in a journal article %

Date published: April 20, 2020

Drought conditions during NHD topographic surveys and other streamflow observations in the Pacific Northwest, USA

This dataset adds attributes describing the self-calibrated Palmer Drought Severity Index (PDSI) during the observation year of wet/dry streamflow observations collected in the Pacific Northwest, USA. Streamflow observation locations are linked to the nearest National Hydrography Dataset high-resolution (NHD-HR) stream segment to obtain stream order and stream permanence (perennial%

Date published: March 25, 2020

Biogeochemical Data for Mercury and other Constituents in Surface Sediment and Deep Cores from the Hells Canyon Reservoir Complex, Idaho and Oregon 2014-2018

Due to concerns regarding mercury (Hg) contamination within the HCC, in cooperation with Idaho Power Company, the U.S. Geological Survey has been leading an investigation into the sources, transport, microbial transformations, chemical speciation and bioaccumulation of Hg in this complex river-reservoir environment. 

Date published: March 16, 2020

Selenium and mercury in the Kootenai River, Montana and Idaho, 2018-2019

This 2018-2019 study generated baseline data on selenium and mercury concentrations in fish tissue and selenium and nutrient data in the water column of the Kootenai River and principal tributaries in Montana and Idaho.

Date published: January 24, 2020

USGS Idaho Water Science Center ScienceBase Portal

This portal page provides links to all USGS ScienceBase Catalog entries produced the Idaho Water Science Center.

Date published: January 21, 2020

Hydrogeologic Framework of the Treasure Valley and Surrounding Area, Idaho and Oregon

A three-dimensional hydrogeologic framework model (3D HFM) of the westernmost western Snake River Plain (WSRP) aquifer system was prepared to represent the subsurface distribution and thickness of four hydrogeologic units. 

Date published: January 7, 2020

Model Archive Summary for Suspended Sediment, Acoustic Sediment Surrogate Model 2.0, USGS gage number 13342500, Clearwater River at Spalding, Idaho

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