Airborne Thermal Infrared and High-resolution True-color Imagery and Longitudinal Profiles of Stream Temperatures, Upper Donner und Blitzen River Basin, Oregon, August 2020

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 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.

本数据集涵盖地理配准的高分辨率机载热红外（Thermal Infrared, TIR）影像与高分辨率真彩色影像、河道中心线折线形状文件、用于河道纵向温度剖面的热红外采样点折线形状文件，以及俄勒冈州多纳恩-布利茨河（Donner und Blitzen River）及其支流的河道纵向温度剖面表格文件。
机载热红外航拍由NV5 Geospatial公司使用直升机完成，以GeoTiff格式发布为17幅栅格镶嵌图，空间分辨率为0.3米。热红外镶嵌图包含经过校正的地表温度数据，单位为摄氏度（℃），数据值乘以10以生成无符号整数像素类型。纵向河道温度剖面的温度单位同样为摄氏度。
本热红外数据集覆盖范围从俄勒冈州弗伦奇格勒附近延伸至斯蒂恩斯山的流域源头，总长159千米，涵盖多纳恩-布利茨河及其支流。热红外航拍数据采集于2020年8月13、14、15日的下午时段（13:00-17:00）。
本次热红外航拍数据通过部署于整个调查区域纵向沿线的29个河道内连续温度记录仪完成校准。真彩色影像以单幅栅格镶嵌图形式发布，覆盖整个调查的上多纳恩-布利茨河流域河道网络，空间分辨率为0.1米。河道中心线通过地理信息系统（Geographic Information System, GIS）手动数字化获取。
纵向河道温度剖面的温度数据通过自动与手动两种方法，从热红外影像中沿河道中心线采样获取。研究以佩奇斯普林兹营地（Page Springs Campground）附近的跨河大桥为起点，沿多纳恩-布利茨河向上游按河道距离绘制纵向河道温度剖面，该数据集可用于解读地下水排泄模式并识别潜在的冷水庇护栖息地。