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<br />Purpose <br /> <br />A multidisciplinary study was conducted to evaluate the flood hydro- <br /> <br /> <br />logy of the Big Thompson River basin and to compare the systematic, <br /> <br /> <br />historic, and paleoflood estimates with PMF results, The primary purpose <br /> <br /> <br />of this study is to demonstrate the extreme differences in flood-frequency <br /> <br /> <br />estimates based on systematic streamflow and paleohydrologic data compared <br /> <br /> <br />to PMF estimates in an area of mixed-population flood hydrology, The <br /> <br /> <br />second purpose is to demonstrate the lack of intense large-areal-extent <br /> <br /> <br />rainstorms at high elevations, and that storm transposition of low eleva- <br /> <br /> <br />tion storms could lead to erroneously large computed flood discharges. <br /> <br />9 <br />