Record Display for the EPA National Library Catalog


Main Title Hydrologic Sensitivities of the Sacramento-San Joaquin River Basin, California, to Global Warming.
Author Lettenmaier, D. P. ; Gan, T. Y. ;
CORP Author Washington Univ., Seattle. Dept. of Civil Engineering. ;Asian Inst. of Tech., Bangkok (Thailand). Div. of Water Resources Engineering.;Corvallis Environmental Research Lab., OR.
Publisher cJan 90
Year Published 1990
Report Number EPA/600/J-90/446;
Stock Number PB91-177279
Additional Subjects Global warming ; Air water interactions ; Hydrology ; California ; Long term effects ; Sacramento River ; San Joaquin River ; Watersheds(Basins) ; General circulation models ; Evapotranspiration ; Flooding ; Soil water ; Snowmelt ; Carbon dioxide ; Runoff ; Seasonal variations ; Climatic changes ; Air pollution ; Precipitation(Meteorology) ; Reprints ;
Library Call Number Additional Info Location Last
NTIS  PB91-177279 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 19p
The hydrologic sensitivities of four medium-sized mountainous catchments in the Sacramento and San Joaquin River basins to long-term global warming were analyzed. The hydrologic response of these catchments, all of which are dominated by spring snowmelt runoff, were simulated by the coupling of the snowmelt and the soil moisture accounting models of the U.S. National Weather Service River Forecast System. In all four catchments the global warming pattern, which was indexed to CO2 doubling scenarios simulated by three (global) general circulation models, produced a major seasonal shift in the snow accumulation pattern. Under the alternative climate scenarios more winter precipitation fell as rain instead of snow, and winter runoff increased while spring snowmelt runoff decreased. In addition, large increases in the annual flood maxima were simulated, primarily due to an increase in rain-on-snow events, with the time of ocurrence of many large floods shifting from spring to winter. (Copyright (c) 1990 by the American Geophysical Union.)