Statistical Comparisons of Watershed-Scale Response to Climate Change in Selected Basins across the United States

Earth Interactions

JohnRisley¹ 

关键词: Climate change;    Watershed modeling;    Streamflow;    Snowmelt;    Rainfall;    Groundwater;   

DOI  :  10.1175/2010EI364.1

学科分类：地球科学(综合)

来源: American Geophysical Union

【 摘 要 】

AbstractIn an earlier global climate-change study, air temperature and precipitation data for the entire twenty-first century simulated from five general circulation models were used as input to precalibrated watershed models for 14 selected basins across the United States. Simulated daily streamflow and energy output from the watershed models were used to compute a range of statistics. With a side-by-side comparison of the statistical analyses for the 14 basins, regional climatic and hydrologic trends over the twenty-first century could be qualitatively identified. Low-flow statistics (95% exceedance, 7-day mean annual minimum, and summer mean monthly streamflow) decreased for almost all basins. Annual maximum daily streamflow also decreased in all the basins, except for all four basins in California and the Pacific Northwest. An analysis of the supply of available energy and water for the basins indicated that ratios of evaporation to precipitation and potential evapotranspiration to precipitation for m...

【 授权许可】

Unknown