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<br /> 1000000 <br />VI <br />..... <br />C"') <br />... <br />- <br /> 100000 <br />- <br />Q) <br />r:n <br />1- <br />CI:l 10000 <br />..c:: <br />() <br />VI <br />Cl 1000 <br />.::.<: <br />CI:l <br />Q) 100 <br />a. 1 <br /> <br />PMF <br /> <br />(Thomas, 1997) <br />~ <br />(WRC,1979) X----' <br /> <br /> <br />~I <br /> <br />Paleofloods <br /> <br />D... In... .1f..He..... <br /> <br />1 0 <br />Recurrence <br /> <br />100 <br />Interval, <br /> <br />1000 <br />years <br /> <br />10000 <br /> <br />8, Flood-frequency relations developed using rainfall-runoff models for Box Elder Creek about <br />3 miles downstream from Elizabeth (Water Resources Consultants, 1979), Paleoflood data at <br />this site also are shown as rectangles, which reflect ranges of the magnitude and age for each <br />paleoflood, Th~ 100-year flood estimated from a preliminary regional-regression analysis by <br />Will Thomas (Michael Baker, Jr" written commun., 1997) also is shown, The probable <br />maximum flood estimate extrapolated for the basin size from the envelope curve of PMF values <br />(fig, 4) IS shown for comparison, <br /> <br />VI 1000000 <br />-- PMF <br />(') <br />... <br />- <br />Q) 100000 (Thomas, 1997) <br />r:n <br />1- (FEMA, 1993) <br />CI:l <br />..c:: <br />() <br />VI 10000 <br />0 (CH2MHILL, <br />.::.<: ~ ,," <br />CI:l 1990) D.,. I.... "1r:.FFC...4' <br /><1l <br />a. 1000 <br /> 1 1 0 100 1000 10000 <br /> Recurrence Interval, years <br /> <br /> <br />9, Flood-frequency relations developed using rainfall-runoff models for Box Elder Creek at <br />Watkins and 3 miles downstream from 1-70 (FEMA, 1993; Corps of Engineers, 1990), Flood- <br />frequency relations developed using rainfall-runoff relations for Urban Drainage Flood Control <br />District (CH2MHILL, 1996) also are shown, Paleoflood data also are shown as a rectangles, <br />which reflect ranges of the magnitude and age for each paleoflood, The 10Q-year flood estimated <br />from a preliminary regional-regression analysis by Will Thomas (Michael Baker, Jr" written <br />commun" 1997) also is shown, The probable maximum flood estimate (Corps of Engineers, <br />1 aan\ j", shown for comparison. <br />