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<br />~ <br /> <br />. <br /> <br />DAM FAILURE DISCHARGE' (lAl- / ) <br /> <br />DAM: <br /> <br />co- BY: <br /> <br />W. Di'l. <br /> <br />'/\/. ~ist. <br /> <br />DATE: <br /> <br />PHYSICAL DATA: <br /> <br />Height, H = <br /> <br />Ft. Freeboard, FB= <br /> <br />Ft. <br /> <br />H-FB=Yo = <br /> <br />Ft. <br /> <br />Crest Width, Wc = <br /> <br />Capacity, V = <br /> <br />Ac. Ft. <br /> <br />Embankment Slopes, Z:l: <br /> <br />Upstream = --,-:1 <br /> <br />Downstream = _: I <br /> <br />. Crest Length,LC = <br /> <br />Ft. <br /> <br />Surface Area,A = <br /> <br />Ac. <br /> <br />(H + 10) / Vv = <br />5 ' c <br /> <br />(Fl" 01 ) (LC-' 543 ) (A4. 45) (V- 5.3-9)= <br /> <br />ForV/H<200 , min. 0.5"'K2"'1.5 max. <br />For 200:!:V/H~ 1O~0, min. O. 05:!: K2~ 1. 5 max. <br />For V/H>IO.OO ,min. 0.005"'K2~1.5 max. <br /> <br />use K2 = <br /> <br />min. 0.5 ~Kl .: 1.5 max. <br /> <br />use KI= <br /> <br />C 5 )1/2= <br />21 + 22 <br /> <br />K4 = erosiveness ,of emb~'t. mat'!. <br /> <br />min. 0.5 ~ K3 ~ <br /> <br />0.5 ~ K4 .: <br />tight <br /> <br />1.5 <br />erosive <br /> <br />1. 5 max. <br /> <br />1.0 .: K4 ~ <br />stable <br /> <br />use K3 = <br /> <br />use K4 = <br /> <br />Est'd. peak 'dry failure' flood discharge, Q cfs <br /> <br />Yo <br />K =""H x KI x. 'Kz x K3 x K4 = <br />~0.10 <br />T" (3 . 37){V' 093)(e-l. 7KV" . ) .. <br /> <br />Hrs. <br /> <br />Q = 2V x 43560 = <br />p l' x 3600 <br /> <br />( V <br />( T <br /> <br />) x 24.2 = <br />) <br /> <br />cfs <br />