Laserfiche WebLink
<br />An initial investigation based upon a similar study for <br />Eagle County, Colorado, (Ref. 3) suggested consideration of <br />only the drainage area, A, the basin elevation, E, and the <br />seasonal (October-April) precipitation, Ps, for detailed <br />analysis. The regressio.n. equations in the following forms] CG <br />were develoDed and the correlation co~fficients were <br />.... ~ .. -------..,"=;; ..~- <br /> <br />z, <br /> <br />evaluated. <br /> Q = fn (A) (1) <br /> Q = fn (A, E) 0 <br /> \ ~ <br /> Q = fn (A, Ps) <br /> Q = fn (A, Ps, E), <br />Where term "fnll denotes "function of". <br /> <br />~he correlation analysis indicated that the regression <br />equations, in the form of Equations 2, 3 and 4 did not provide <br />any significant improvement over the regression equations <br />in the form of Equation 1. The recommended equations as <br /> <br />provided by the regression analysis are: <br />QlO = 32.1 A 0.779 R = 0.956 (5) <br />Q50 = 34.4 AO.809 R = 0.965 (6) <br />QlOO = 35.1 AO.8l9 R = 0.968 (7) <br />Q500 = 36.6 AO.835 R = 0.971 (8) <br />Where R is the correlation coefficient. <br /> <br />DISCHARGE-FREQUENCY RELATIONSHIPS FOR SMALL DRAINAGE BAS IllS <br />Rainfall events, althouqh infrequent, have been recorded <br />in the Colorado mountainous areas usually as localized <br />thunderstorms. These severe rainfall events have generally <br />been limited to a 10 square mile area. <br /> <br />Meadow Creek, with a drainage basin less than 6 square miles <br />in area, was considered to determine the effect of rainfall. <br />events. The Soil Conservation Service (SCS) procedure <br />which is also the basis for SCS Technical Release No. 20, <br />(Ref. 9) was used to develop synthetic hydrographs for <br />10-, 50-, and 100-year recurrence interval events. The <br />500-year frequency discharge was obtained by extrapolation. <br /> <br />-7- <br />