Stream temperature predictions for the Willamette River Basin, northwestern Oregon estimated from regression equations (1954 – 2018)

This data release contains estimated stream temperature metrics at three locations in the Willamette River Basin, northwestern Oregon for various periods between 1954 and 2018. These locations were the Willamette River at Albany, the Willamette River at Harrisburg, and the Willamette River at Keizer. A regression program (written in the R programming language) was used to relate the values for two stream temperature metrics (the seven-day average of the daily mean and the seven-day average of the daily maximum) to the seven-day average of the daily mean or the seven-day average of the daily maximum air temperature, and to the mean daily streamflow for five seasonal time periods at each of the locations. The regression equations were used to predict the seven-day average of the daily mean stream temperature and the seven-day average of the daily maximum stream temperature for each day during the modeled time period at each location. The regression equations were based on data collected at these three locations and at nine additional locations. These additional locations included the Willamette River at Willamette Falls, the Willamette River at Newberg, the Willamette River at Owosso Bridge, the Santiam River at Jefferson, the North Santiam River near Mehama, the McKenzie River at Hayden Bridge, the McKenzie River at Vida, the Middle Fork Willamette River at Jasper, and the Coast Fork Willamette River at Goshen.