Meeting Dates: December 14 – 18, 2015 Session Title: Detection and attribution of changes in relations between concentration and streamflow discharge over time Session Description: Regression models used to estimate exports of constituents in fluvial systems are usually applied over the period of record for water quality sampling because of uncertainty in the stability of, or temporal trend in, relations between concentration and streamflow discharge that are fundamental to many models. Existing time series for many constituent concentrations are long enough to begin to assess assumptions of stationarity or trends to evaluate the justification for applying regression equations to estimate constituent export outside of the sampling period. The ability to employ such models to explore the potential consequences of climate change and human alterations of hydrologic systems would be a major advance. We solicit contributions that evaluate the use of regression models to estimate dissolved constituent export over time and uncertainties associated with extrapolation. Studies that analyze for the presence of trends in relations between concentration and streamflow and attribution of change are particularly encouraged. Co-conveners: Thomas Huntington, Brent Aulenbach, and Sarah Stackpoole Primary Section /Focus Group: Biogeosciences Cross-Listings: Global Environmental Change and Hydrology
