19 States & Mexico Rely on Colorado Water

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Presentation transcript:

Water and Climate Craig Cotten Division Engineer Colorado Division of Water Resources

19 States & Mexico Rely on Colorado Water

Colorado’s Eight Major Basins Yampa /White North Platte Colorado South Platte Arkansas Rio Grande Gunnison San Juan/ Dolores

West Wide Climate Risk Assessment: Upper Rio Grande Impact Assessment Bureau of Reclamation Publication Authored by Dagmar Llewellyn and Seshu Vaddey

Rio Grande Headwaters. Rio Grande near Del Norte Rio Grande Headwaters Rio Grande near Del Norte Conejos River near Mogote San Antonio River at Ortiz Los Pinos River near Ortiz

FINDINGS, by 2099: Flows at these sites will decrease by approximately 33% overall Peak flow will move to earlier in the year, from June to May Most flow decrease will occur from June to September

Climate Change Relatively small, gradual decrease in annual precipitation Highly variable annual precipitation amounts More frequent rainfall events – Less frequent snowfall events Warming Temps expected to diminish snowfall accumulation Warming Temps lead to increased ET, decreased runoff

Thank you! Questions?

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