This dataset includes georeferenced, high-resolution, airborne thermal infrared (TIR) and high-resolution true-color imagery, a polyline shapefile of the channel centerline, a polyline shapefile with TIR sample points for longitudinal stream temperature profiles, and a tabular file with longitudinal stream temperature profiles for the Donner und Blitzen River and its tributaries, Oregon. The aerial TIR surveys were conducted with a helicopter by NV5 Geospatial and are published as 17 raster mosaics in GeoTiff format with a resolution of 0.3 meters (m). The TIR mosaics contain corrected surface temperatures in degrees Celsius (C) (multiplied by 10 to create an unsigned integer pixel type). The longitudinal stream temperature profiles have temperatures in degrees C. The TIR dataset encompasses 159 kilometers (km) of the Donner und Blitzen River and its tributaries that extends from near Frenchglen, Oregon into the basin headwaters on Steens Mountain. The TIR surveys were collected during the afternoons (13:00-17:00) of August 13, 14, and 15, 2020. The TIR surveys were calibrated using continuous temperature loggers deployed at 29 in-stream locations distributed longitudinally throughout the survey area. The true-color imagery is published as a single raster mosaic of the entire surveyed upper Donner und Blitzen River basin stream network with a resolution of 0.1 m. Channel centerlines were manually digitized within a geographic information system. Stream temperatures for longitudinal profiles were sampled using both automated and manual methods along the channel centerline from the TIR imagery. The stream temperatures were plotted versus channel distances upstream along the Donner und Blitzen River, starting from the bridge over the river near Page Springs Campground to create longitudinal stream temperature profiles, which may be used to interpret groundwater discharge patterns and to identify potential cold-water refuges.

An initial reconnaissance survey in March 2016 and a subsequent survey in July 2016 was conducted to identify possible groundwater discharge points along the stream reach using a forward-looking infrared (FLIR) camera in seasonal extremes. The high-resolution thermal imaging camera captures the emitted infrared radiation of the objects in view. Recent studies using similar ground-based thermal infrared imaging techniques have been successful in qualitatively locating groundwater discharge along discrete features, such as fractures and faults, as well as diffuse seepage along stream banks (Deitchman and Loheide, 2009; Pandey and others, 2013). Sites of interest were those where temperature differences were observed between the stream surface and points of streambank inflow, more specifically where warmer groundwater was observed flowing from the streambank into the relatively cooler stream during the winter and cooler groundwater entering the relatively warmer stream during the summer.

An initial reconnaissance survey in March 2016 and a subsequent survey in July 2016 was conducted to identify possible groundwater discharge points along the stream reach using a forward-looking infrared (FLIR) camera in seasonal extremes. The high-resolution thermal imaging camera captures the emitted infrared radiation of the objects in view. Recent studies using similar ground-based thermal infrared imaging techniques have been successful in qualitatively locating groundwater discharge along discrete features, such as fractures and faults, as well as diffuse seepage along stream banks (Deitchman and Loheide, 2009; Pandey and others, 2013). Sites of interest were those where temperature differences were observed between the stream surface and points of streambank inflow, more specifically where warmer groundwater was observed flowing from the streambank into the relatively cooler stream during the winter and cooler groundwater entering the relatively warmer stream during the summer.

This dataset includes georeferenced high-resolution, airborne thermal infrared (TIR) imagery, a polyline shapefile of the channel centerline, and a tabular file with longitudinal stream temperature profiles for Hat Creek, California. The two aerial TIR surveys were conducted with a helicopter by NV5 Geospatial (formerly Quantum Spatial, Inc.) and are published as two raster mosaics in GeoTiff format with a resolution of 0.5 m. The TIR mosaics and longitudinal stream temperature profiles contain corrected surface temperatures in degrees C (multiplied by 10 to create an unsigned integer pixel type). The TIR dataset encompasses a 64.6-km reach of Hat Creek that extends from 50 m upstream of the confluence with Lost Creek to 50 m downstream of the confluence with the Pit River. The TIR surveys were collected during the afternoon of August 24, 2018, and the morning of August 25, 2018. The two TIR surveys were calibrated using continuous temperature loggers deployed at 12 in-stream locations distributed longitudinally throughout the survey area. A channel centerline was manually digitized within a geographic information system (GIS), and stream temperatures for longitudinal profiles were automatically sampled along the channel centerline from the TIR imagery. Sampled temperatures for the longitudinal profiles were manually filtered to remove measurements of non-water surfaces. The stream temperatures were plotted against channel distance upstream from the mouth of Hat Creek to create longitudinal stream temperature profiles, which were used to interpret groundwater discharge patterns.

This dataset includes georeferenced high-resolution, airborne thermal infrared (TIR) imagery, a polyline shapefile of the channel centerline, and a tabular file with longitudinal stream temperature profiles for Hat Creek, California. The two aerial TIR surveys were conducted with a helicopter by NV5 Geospatial (formerly Quantum Spatial, Inc.) and are published as two raster mosaics in GeoTiff format with a resolution of 0.5 m. The TIR mosaics and longitudinal stream temperature profiles contain corrected surface temperatures in degrees C (multiplied by 10 to create an unsigned integer pixel type). The TIR dataset encompasses a 64.6-km reach of Hat Creek that extends from 50 m upstream of the confluence with Lost Creek to 50 m downstream of the confluence with the Pit River. The TIR surveys were collected during the afternoon of August 24, 2018, and the morning of August 25, 2018. The two TIR surveys were calibrated using continuous temperature loggers deployed at 12 in-stream locations distributed longitudinally throughout the survey area. A channel centerline was manually digitized within a geographic information system (GIS), and stream temperatures for longitudinal profiles were automatically sampled along the channel centerline from the TIR imagery. Sampled temperatures for the longitudinal profiles were manually filtered to remove measurements of non-water surfaces. The stream temperatures were plotted against channel distance upstream from the mouth of Hat Creek to create longitudinal stream temperature profiles, which were used to interpret groundwater discharge patterns.

This Data Release contains stream temperature observations for 10 sites in the Sleepy Creek Watershed (West Virginia) during summer 2021. Data were collected using Onset ProV2 temperature gages within perforated PVC cases attached to stream substrates with rebar. Temperature gages were deployed and retrieved by volunteers with the Sleepy Creek Watershed Association. Temperature records are provided for 30-minute increments between June 1 and August 31, 2021 (92 days, 4416 observations per site, total of 44160 observations). Site location coordinates are provided.

This Data Release contains stream temperature observations for 10 sites in the Sleepy Creek Watershed (West Virginia) during summer 2021. Data were collected using Onset ProV2 temperature gages within perforated PVC cases attached to stream substrates with rebar. Temperature gages were deployed and retrieved by volunteers with the Sleepy Creek Watershed Association. Temperature records are provided for 30-minute increments between June 1 and August 31, 2021 (92 days, 4416 observations per site, total of 44160 observations). Site location coordinates are provided.

The water temperature data were collected in summer 2021, 2023, and 2024. Continuously recording temperature loggers were deployed at the confluences of Indian Creek and Duncan Springs in the Pend Oreille River. Loggers were deployed near the substratum and near the surface of the water column.

The water temperature data were collected in summer 2021, 2023, and 2024. Continuously recording temperature loggers were deployed at the confluences of Indian Creek and Duncan Springs in the Pend Oreille River. Loggers were deployed near the substratum and near the surface of the water column.

The water temperature data were collected in summer 2021 and 2023. Continuously recording temperature loggers were deployed at the confluences of Indian Creek and Duncan Springs in the Pend Oreille River. Loggers were deployed near the substratum and near the surface of the water column.