Boise River Watershed CMIP5 Canada Copula function EURO-CORDEX projections HSPF Northeastern US Q1-390 QC851-999 RCM uncertainty RCP4.5 RCP8.5 Southeast U.S. bic Book Industry Communication::R Earth sciences, geography, environment, planning::RB Earth sciences::RBP Meteorology & climatology catchment based macroscale floodplain model changing of exceedance climate climate change climate change and variability climate change impacts climate projections consecutive dry days continuous simulations downscaled projections downscaling drought-flood abrupt alternation droughts ensembles extreme hydrologic events extreme precipitation