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<br />1-5. Calculating th" Non-OiJl1ension~l roefficiE'nt~ <br /> <br />- <br />ThE' coefficient, C, is non-dimen~;onalizerl hy USiM the h!'arl on the <br /> <br />- <br />dam at the time of failur", Vo" <br /> <br /> - - '1-1 <br />r. - r. . v 0-11) <br /> .('1 <br /> 171.(\2 Rfil'l.2m - 1 <br /> = <br />r. = fi.QI1 <br /> <br />The Fro~de numhpr, Fo' is alroarlv 10n-dimensional. However, it must <br />he calculatpd for cOr'lditions at the MOMent of failure. This rl!quires thl>. <br /> <br />following equations. <br /> <br />F = ii rr;-r- <br />o 0 V'J Yo <br /> <br />(1-9) <br /> <br />" = l.4R~ R?13 S 1/2 <br />'0 ., 0 0 <br /> <br />(I-10) <br /> <br />Calcuhtino the hyrlraulic rildius tnrrn in equation 0-10) is difficult <br /> <br /> <br />since wp.tted perimeter is not known. The followinn interpolation scheme <br /> <br />is proposed. When ~ = 0, the section is rectanoular; whE'n M = 1, it is <br /> <br />- <br />a triangular section, Using thl! value cillculated abovp for C, calculate <br /> <br /> <br />the hydraulic radii for ,~ = '1 and for " = 1. Then interpolate, hased on <br /> <br />- <br />thE' true value of '., to ohtain D ~s follll"/s. <br />n <br /> <br />. <br /> <br />{' <br /> <br />65 <br />