Idaho Water Science Center

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Filter Total Items: 81
Date published: January 18, 2021

Nimz Ranch Tie Channel Velocity Mapping and Discharge Measurements, Kootenai River near Bonners Ferry, ID

Discharge measurements and velocity mapping surveys were completed at select tie channels located at Nimz Ranch, on the main-stem Kootenai River. Tie channels convey water and sediments between the main river channel and river floodplain waterbodies. The velocity mapping surveys are used to document how the tie channels interact with the main-stem Kootenai River.

Date published: January 18, 2021

Copper River and Knik River Bathymetric Surveys at Select Alaska Highway Bridges near Flag Point and Butte, Alaska, 2020

In 2020, the Alaska Science Center and the Idaho Water Science Center conducted bathymetric surveys at three highway bridge structures. The bridge structures (NBI 331 and 1187) at Flag Point near Cordova, AK are located on Alaska State Route 10 (commonly referred to as the Copper River Highway). Bridge structure NBI 539 on the Knik River is located on the Old Glenn Hwy near Butte, AK.

Date published: November 20, 2020

Kootenai River Supplemental Surveys near Bonners Ferry, ID, 2012-2020

In 2009, the Kootenai Tribe of Idaho released and implemented the Kootenai River Habitat Restoration Master Plan. This plan aimed to restore, enhance, and maintain the Kootenai River habitat and landscape to support and sustain habitat conditions for aquatic species and animal populations. In support of these restoration efforts, the U.S. Geological Survey, in cooperation with the Koote

Date published: November 2, 2020

Chemical characterization of water and suspended sediment of the Snake River and Hells Canyon Complex (Idaho, Oregon)

This dataset includes laboratory analyses of surface water samples and sediment trap material collected from (1) locations upstream, downstream, and within the Hells Canyon Complex (Idaho, Oregon) of the Snake River, (2) tributaries of the Snake River, and (3) two reservoirs near Boise, Idaho, from 2014 to 2019. The study area spans approximately 232 river miles of t

Date published: October 29, 2020

Microplastics in the Delaware River, 2018

This dataset describes the quantity and morphology of microplastics in water, sediment, fish, and mussel samples from the Delaware River and select tributaries, including portions of the Upper Delaware Scenic & Recreational River, Middle Delaware National Scenic River, Delaware Water Gap National Recreation Area, and Lower Delaware Scenic & Recreational River. Water and sediment

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 %