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San Luis, <br />Ana~ysis of the Magnitude and <br />Frequency of Floods in Colorado <br />By J,E. `J2i I <br />U 5 GEOLC3 CALSURVeY <br />Wam-.P.oco~rc•c'nvro.tr;acoac Ra:or. ~P~!DO <br />~•Fpd'Eti ^ ~JPB'.lL~^. W ~1 L'E <br />CO..QR4C+0 CEPART4.'EK' OFTRANSPOR'ATIO'J <br />a^c tAC H..~ReA.,, C= J+.~~C ":'.AVAGER'E'.' <br />Oa~ver ~a nraa~ <br />?::~ <br />Tabte ~. Regional ffo~a-frequency ea~ations, Colora~o <br />.Q. Pa~c4urae. sn cu~ic ftet zer •.r.oud: ra. dca~naze a:ea. m~qwie nvlr,: F, meass aasa:il preci~itat~en, u~ 'snese;. S. mew damnngo-t~in slope. in ftot }xr tcct <br />Recurrence interval. <br />~~ yea~ <br />Regresslon equation StAndard error <br />of the model, <br />in percent Average stondard <br />error of prediction, <br />in percent <br />Rio C;ru:de region <br />? Q= 0.03 (.d) 0.970 ~p} 1.615 77.7 3Lti <br />5 Q= 0.1? {.~I ) ~°10 ~p~ 1.351 6-}.0 67.9 <br />.4 Q= p. ?> (.~1) ~ 91» ~~~ 1.??7 53? 6 t.9 <br />'i Q= d.~2 ; d) o_sss ~I,~ t.tt~ ~3.4 ~6.5 <br />SD Q= 0.81 ~.d} o.SSa ~p~ 1.121 ~1? 54S <br />I Oa Q= 1.19 (d} ~.~b ~F,~ 1.Oi4 49.9 ~33 <br />_'0~ Q= 1.67 (.~) e.s:s ~p~ l.0~6 49.5 52.9 <br />50~ Q=? 43 (.~! j ~&os ~P~ 0.995 >0.0 53.6 <br />USGS <br />Area = 29.59 s . mi. <br />Mean Mnual Preci itation- 20 in <br /> <br />Recurrence Interval rs <br />2 Gl = 0.03* A^0.979* P^1.615 = 104 cfs <br />5 G1= 0.12* A^0.940* P^1.384 = 183 cfs <br />10 Gl - 0.25* A^0.914* P^1.277 = 254 cfs <br />25 ~- 0.52* A^0.884* P^1.917 - 295 cfs <br />50 ~= 0.81 * A^0.864" P^1.121 = 435 cfs <br />100 Q= 1.19" A^0.846` P^1.074 = 522 cfs <br />200 ~= 1.67* A^0.828* P^1.036 = 615 cfs <br />500 Q= 2.48* A^0.808* P^0.995 = 755 cfs <br />