Linear regressions of Sw-add-dyn and nutrient concentration that we used to estimate Sw-amb were developed from single tracer additions at each study site, and to the best of our knowledge, these are the first spiraling regressions to have this type of data density within a stream reach.
This increased data density should help improve extrapolations to estimate ambient spiraling parameters, which is a useful approach given the high costs and health concerns associated with measuring ambient spiraling using stable isotope or radio labeled tracers.