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Signal vs Noise for Watershed Health Monitoring Habitat Metrics, 2009-2019

Publication number Date Published
22-03-029November 2022
VIEW NOW Signal vs Noise for Watershed Health Monitoring Habitat Metrics, 2009-2019 (Number of pages: 12) (Publication Size: 450KB)

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Author(s) robbins, jeff
Description The Department of Ecology’s (Ecology’s) Watershed Health Monitoring (WHM) program surveyed random stream sites across Washington state each year, 2009-2019. Stream surveys are ongoing, and more data are being collected after 2019. Field habitat data were used to calculate habitat metrics. The metrics help define regional stream characteristics within the state. These physical habitat metrics describe instream and riparian features.

Signal-to-Noise ratio (SNR) is a comparison of a metric’s variability across sites with the variability of repeated measurements and is indicative of which metrics provide discernable monitoring information relative to errors. We calculated statewide SNR values for habitat metrics and assigned them to three levels of precision.

Analyses in this report are confined to data collected in wadeable streams using the WHM narrow protocol. Data collected with this protocol comprise over 80% of WHM data and nearly all of the data submitted by external collaborators to the WHM Database.

In this report, we present statewide results for a total of 132 habitat metrics. Of these metrics, 112 were classified as precise or moderately precise. These results provide insight into habitat metrics in the WHM Database demonstrating high precision and repeatability. These results can help end-users and groups implementing the narrow protocol for monitoring in order to better understand those metrics which might be useful in evaluating habitat quality.
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Keywords rivers, watershed health, streams, habitat metrics, Signal-to-Noise ratio
WEB PAGE Watershed health monitoring