Historical peak daily streamflow volume with a 10-year return interval (50% annual chance of exceedance). Daily streamflow for each watershed was assessed at the mouth of each river.

These data are part of a set which includes historical conditions (1970-1999, in cubic feet/second) and the projected changes (in percent) for ten global models. Two time periods are considered: the 2040s (2030-2059) and the 2080s (2070-2099), based on a moderate greenhouse gas scenario (A1B). Results are included only for watersheds for which at least 8 out of the 10 models agree on the direction of change.

When rendered and displayed in Map Viewer (web map): Data classes and symbology by Robert Norheim, Climate Impacts Group, based on the CMIP3 projections used in the IPCC 2007 report.

Data source: Hamlet et al. 2013.