Thermally enriched air and stormwater runoff from urban areas have been identified as contributing heat sources to downstream surface waters. To date, the study of air quality, cooling, stormwater, and health benefits of urban forests have been widely covered, but surprisingly little research has focused on quantifying the relationship between urban air and stormwater runoff temperatures and furthermore, how these heat sources may affect downstream ecosystems. We measured temperature, water, and weather variables (air, pavement, and runoff temperatures, precipitation, solar radiation), and tree metrics (type, height, canopy cover fraction) at 12 study sites in Portland, Oregon during the warm summer season of 2016...
