Trask River Watershed Study: Stream temperature, conductivity, and air temperature, 2007-2016

These data are a portion of the larger Trask River Watershed Study which was conducted in the East Fork of the South Fork Trask River of the Coast Range of western Oregon. Stream temperature, conductivity, and air temperature were recorded at multiple locations over the course of this study from 2007 through 2016 (starting and ending dates vary per site). The Trask River Watershed study area consists of 4 large catchments: Pothole Creek, Gus Creek, Rock Creek, and Upper Main Trask. Within each of the four catchments, 2-4 headwater sites and a downstream site were sampled. In general, Trask River Watershed study data were collected during pre-harvest (2006-2011) and post-harvest (2013-2016) periods, from treated and reference headwater watersheds and from downstream sites. The year-round 10-minute stream temperature and conductivity data were collected for 9 (HAB and FLUME) headwater sites and 4 downstream sites. Summertime measurements were also made of instantaneous temperature every 30 minutes using HOBO Loggers at 19 locations across the four sub-basins. Data collection began in May/June and ended September/October each year corresponding with the seasonal low-flow period. Summer air temperatures were recorded at 30-minute intervals at 6 of the habitat site locations (paired with selected stream summer water temperature sites). Summer water temperatures (30-minute) were also recorded along the mainstream and in additional headwater streams in the Trask River Watershed.
These data are a portion of the larger Trask River Watershed Study. The general objectives of the Trask River Watershed Study were to investigate the effects of forest harvest on the physical, chemical and biological characteristics of small headwater streams, and the extent to which alterations in stream conditions caused by harvest along headwater channels influence the physical, chemical and biological characteristics of downstream fish-bearing streams.