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<br />0022(3 <br /> <br /> REPORT DOCUMENTATION PAGE Form ApprovBd <br /> OMS No. 0704-0188 <br />Public repolllng burden tor this collection of information IS estimated to average 1 hour par response. ,nchldlng lhellme lor revie.....lng Instructions, searching e..isting data sources, galhenng and <br />maintaining the daiS nBeded. end completing and review,ng the collection 01 Information. Send commenlS regarding thiS burden estimate or any other aspect 01 thiS collection 01 'nlorma\lon <br />Including suggeSllons for redUCing tnlS burden, 10 Washington Headquarters Services, Dlrecloralelor InlormllllOn Operations and Reports. 1215 Jellerson DaVIS Highway. SUII1204, Arlington VA <br />22202-4302, and 10 the othce 01 Management and Budget, Paperwol1< Reducllon Report (0704-0166), Wuhinglon DC 20503 <br />1. AGENCY USE ONLY (Lelve Blank) 12. REPORT DATE 13. REPORT TYPE AND DATES COVERED <br /> March 1996 Final <br />4. TITLE AND SUBTITLE S. FUNDING NUMBERS <br />Global Climate Change Response Program PR <br />Development and Application of a Physically Based Distributed Parameter <br />Rainfall Runoff Model in the Gunnison River Basin <br />6. AUTHOR(S) <br />Tom Ryan, P.E. <br />7. PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES) 8. PERFORMING ORGANIZATION <br />Bureau of Reclamation REPORT NUMBER <br />Technical Service Center <br />Denver Federal Center <br />PO Box 25007 <br />Denver CO 80225-0007 <br />9. SPONSORINGlMONITORING AGENCY NAME(S) AND ADDRESS(ES) 10. SPONSORING/MONITORING <br />Bureau of Reclamation AGENCY REPORT NUMBER <br />Technical Service Center DIBR <br />Denver Federal Center <br />PO Box 25007 <br />Denver CO 80225-0007 <br />11. SUPPLEMENTARY NOTES <br />120. DISTRIBUTION/AVAILABILITY STATEMENT 12b. DISTRIBUTION CODE <br />Available from the National Technical Information Service, Operations <br />Division, 5285 Port Royal Road, Springfield, Virginia 22161 <br />13. ABSTRACT (Maximum 200 words) <br />A physically based distributed parameter rainfall runoff model was developed for the upper Gunnison River <br />Basin in western Colorado. The model was developed using the Precipitation Runoff Modeling System (PRMSl, <br />running inside the Modular Modeling System (MMS) graphical framework. Characterization of the watershed <br />and development of model distributed parameters was accomplished, in large part, through the use of Geographic <br />Information Systems technology. It was concluded that PRMS can be applied successfully on large river basins <br />using a lower spatial resolution approach when the output of interest is weekly, monthly, or yearly volumes of <br />water. <br />The model was used to perform global climate change analysis in the Gunnison River Basin. The rainfall runoff <br />model predicts a decrease in stream flows of 5 percent. Sensitivity model runs were performed on an array of <br />altered historical climate data. These model simulations show that stream flows change significantly as <br />precipitation and temperature change. <br />14. SUBJECT TERMS- -climate! Precipitation Runoff Modeling System! Modular Modeling 1 s. NUMBER OF PAGES <br />System! Geographic Information System! weather/ humidity/ Gunnison River Basin! 64 <br />Colorado/ precipitation! Hydrologic Data Basel Hydrologic Information System! 16. PRICE CODE <br />Hydrologic Response Unit <br />17. SECURITY CLASSIFICATION 18. SECURITY CLASSIFICATION 19. SECURITY CLASSIFICATION 20. LIMITATION OF ABSTRACT <br />OF REPORT OF THIS PAGE OF ABSTRACT <br /> UL UL UL UL <br /> <br />NSN 7S40-01-280-5500 <br /> <br />Stllndard Form 298 (Rev. 2-89) <br />P~.crltMd by ANSI Sid. 239-18 <br />2""'02 <br />