Northwest Fisheries Science Center

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Document Type: Journal Article
Center: NWFSC
Document ID: 8542
Title: Developing an effective model for predicting spatially and temporally continuous stream temperatures from remotely sensed land surface temperatures
Author: Kristina M. McNyset, C. J. Volk, Chris E. Jordan
Publication Year: 2015
Journal: WIREs Water
Keywords: Stream temperature,remote sensing,modeling
Abstract:

Although water temperature is important to stream biota, it’s difficult to collect in a spatially and temporally continuous fashion.  We used remotely-sensed Land Surface Temperature [LST] data to estimate mean daily stream temperature for every confluence-to-confluence reach in the John Day River, OR, USA for a ten year period.  Models were built at 3 spatial scales: site-specific, subwatershed, and basin-wide.  Model quality was assessed using jackknife and cross-validation.  Model metrics for linear regressions of the predicted vs. observed data across all sites and years: site-specific r2 = 0.95, RMSE = 1.25 °C; subwatershed r2 = 0.88, RMSE = 2.02 °C; basin-wide r2 = 0.87, RMSE = 2.12 °C.  Similar analyses were conducted using 2012 8-day composite LST and 8-day mean stream temperature in 5 watersheds in the interior Columbia River basin.  Mean model metrics across all basins: r2 = 0.91, RMSE = 1.29 °C. Sensitivity analyses indicated accurate basin-wide models can be parameterized using data from as few as 4 temperature logger sites. This approach generates robust estimates of stream temperature through time for broad spatial regions for which there is only spatially and temporally patchy observational data, and may be useful for managers and researchers interested in stream biota

Theme: Habitats to Support Sustainable Fisheries and Recovered Populations
Foci: Characterize relationships between habitat and ecosystem processes, climate variation, and the viability of organisms.
Develop effective and efficient habitat restoration and conservation techniques.