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FLOOD06805
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Last modified
1/25/2010 7:10:01 PM
Creation date
10/5/2006 2:31:58 AM
Metadata
Fields
Template:
Floodplain Documents
County
Statewide
Community
State of Colorado
Stream Name
All
Basin
Statewide
Title
Colorado Extreme Storm Precipitation Data Study
Date
5/1/1997
Prepared For
State of Colorado
Prepared By
CSU
Floodplain - Doc Type
Educational/Technical/Reference Information
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<br />. Hydrologic Design Data Acquisition, Detennination of an Upper Limit Design Rainfall <br />for the Colorado River above Hoover Dam. Prepared for the U. S. Dept. of Interior <br />Bureau of Reclamation by Morrison-Knudsen Engineers, Inc. March, 1989. <br /> <br />Several other site-specific studies of probable maximum precipitation have been done <br />during the past several years for high-elevation watersheds in Colorado. These reports <br />can be obtained from the Colorado State Engineer's Office in Denver. <br /> <br />6) Reports and Presentations <br /> <br />During the course of this project, there were several opportunities to present preIiminary <br />results at conferences and workshops. Three written papers were submitted and <br />additional oral presentations were given, all prior to the completion of a final storm list. <br />The opportunities to speak to a variety of audiences during preliminary phases of this <br />project offered excellent opportunities to share the goals of this project with other storm <br />experts and to encourage assistance in learning about extreme storms that have occurred <br />throughout Colorado. The written papers are included in this final report in Appendix D. <br />It is likely that presentations will continue to be given utilizing final lists and compilations <br />contained in or discussed in this report, since there is considerable public interest in heavy <br />precipitation in Colorado. <br /> <br />7) Workshop on Potential to Model Extreme Precipitation Events <br /> <br />a. Introduction <br /> <br />A workshop to discuss and evaluate the potential of mesoscale numerical models to <br />simulate large convective storms at various elevations and to understand the variation of <br />precipitation with elevation was held at CSU on April 19, 1996. The agenda for the <br />workshop is given in Table 3 and the list of attendees is given in Table 4. The clear intent <br />of the workshop was to explore the potential application ofIarge state-of-the-art <br />mesoscale numerical models with three-dimensional capability. Three models were <br />included in the workshop. They are the Colorado State University Region Atmosphere <br />Model System (RAMS), the National Center for Atmospheric Research (NCAR) MM5 <br />model, and the model developed by Terry Clark at NCAR. These three models <br />encompass most of the capabilities of present-day numerical meso-scale simulations. <br /> <br />One of the purposes of the workshop was to help reduce the uncertainty of the present <br />understanding of the variation of extreme rainfall as a function of elevation. Two separate <br />perspectives exist in the literature regarding the variation of extreme precipitation with <br />elevation on the Front Range of Colorado. Firstly, the estimates of Probable Maximum <br />Precipitation (the maximum rainfall that nature can produce) including 24-hour <br /> <br />19 <br />
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