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<br />......:J <br /> <br />Ie <br /> <br />e <br /> <br />. <br /> <br />< <br /> <br />XPAm-n.IU OF '1'11! AIlMl' <br />0P'PlC1!: OY' '1'11! CHIEl" OF EI'D.uUOl:OnD <br />WABHIJI:;TON, Ie 20315 <br /> <br />EM lllO-2-1~U <br />26 March 1952 <br /> <br />EIO:W <br /> <br />Civil Ell&1beer Bulletin No. 52-8 <br /> <br />(Revised March 1965) <br /> <br />STAJIDAJU) PllOJ'ECT FLOOD DI!:'1'ERMIlfATIONB <br /> <br />I. mrROIU::TION <br /> <br />1-01. REFERENCES. <br /> <br />a. Circular Letter No. 4262 (Civil Works No. 65), dated <br />20 November 1946, subject, Standard Project Flood Estimates, wherein <br />original instructions concerning the preparation ot standard project <br />tlooi enimates were issued. <br /> <br />b. Orders & Regulation9, paragnph 4208.11 (Revised Mar. 1951) <br />....herein the preparation ot standard project tlood estimates tor certain <br />classes ot projects is directed, and instructions are presented regard1Dg <br />the submission of certain estimates for approva1 ot the Chief of ED8ineers <br />prior to incorporation in project reports. (See quotation 1D para 4-02 <br />herein) . <br /> <br />c. t:ngineering Manual, Civil Works, Part CXIV, Chapter 5, <br />subjec't, Fload-Hydrograph Analyses and COlllpUtatioDS. <br /> <br />1-02. PURPOSE AND SCOPE OF THIS Btr..LETIlf. <br /> <br />a. This bulletin revie....s brietly principal classes ot tload <br />analyses and es'timates involved in the pllUl1\ing and design of tload con- <br />trol and mul'tiple-purpose projects, ....ith the primary objective of indicat- <br />1Dg the general application and purposes of Standard Project Flood Estimates. <br /> <br />b. Generalized rainfall cri'teria and recOllllllBnded procedures <br />for the cOlllpUtat10n of standard project stom rainfall and rainfall-excess <br />quantities for sma.ll dra1Dl11Se basins (classified herein as approximately <br />1,000 square miles osnd. less) . located e~ of 1050 longitude, are presented, <br />with a coacise explanation of their derivation. <br /> <br />c. ?roce&u.res for derivation of 5PS and SP1I' est1lllatea for <br />large drainage basins (exceed1Dg approx1lllately 1000 sq.a1.) are discussed <br />and iUustrated. <br /> <br />d. This "DUllet1n 18 sub-divided into four .Sections, as tollows: <br />