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

Explore the Bureau of Reclamation publication on the Upper Rio Grande's climate risks and water flow projections in the Rio Grande Basin. By 2099, expect a 33% decrease in flows with peak flow shifting from June to May. Climate change brings less snowfall, more rain events, and reduced runoff due to warming temperatures. For more details, contact the Colorado Division of Water Resources.

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

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  1. Water and ClimateCraig CottenDivision EngineerColorado Division of Water Resources

  2. 19 States & Mexico Rely on Colorado Water

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

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

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

  6. 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

  7. 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

  8. Thank you!Questions?

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