CP003: Precipitation 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

Precipitation 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. Precipitation samples were collected as a composite sample over a three week period. 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 nutrient concentrations and precipitation totals over the collection period.
The original objective was to examine the nutrient budgets for small watersheds through measurement on nutrient input through precipitation and output through streamflow. Nutrient budgets were then to be evaluated for changes in average concentrations and fluxes following timber harvest in adjacent treated and control 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.