CF003: Stream chemistry concentrations and fluxes from Coyote Creek in the South Umpqua Experimental Forest and Fox Creek in the Bull Run Watershed in Mount Hood National Forest, 1969 to 1981

Stream chemistry sampling and analysis was initiated in both of these legacy studies in Oregon at the Coyote Creek (South Umpqua Experimental Forest) and Fox Creek (within the Bull Run Watershed in the Mount Hood National Forest) watersheds in 1969 and concluded in 1981. Water samples were collected proportionally to stream discharge as a function of stage height and composited at each stream gauging site. Composite sampling periods were generally three weeks. Water samples were analyzed at what is now called the Cooperative Chemical Analytical Lab (CCAL) at Oregon State University. Concentrations of analytes include dissolved and particulate nitrogen and phosphorus, pH, conductivity, suspended sediment, and a full suite of cations and anions. Fluxes are calculated using concentrations and flow.
The original objective was to examine the nutrient budgets for small watersheds and to evaluate changes in average concentrations and fluxes following timber harvest in comparison with unharvested reference watersheds.
These data were originally provided by Forest Science Data Bank (Fredriksen and Johnson 2017), and are now also available via the Forest Service Research Data Archive.