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<br />10-DAY PRECIPITATION (Ref: Hy. PO-6, Rev. 2) <br /> <br />STEP <br />1 <br /> <br />Select 2 yr., 6 and 24 Hr. <br />2 yr., 6 Hr. <br />2 yr., 24 Hr. <br /> <br />precip. <br />in. <br />in. <br /> <br />from NOAA Maps. <br /> <br />2 Select appropriate region from Fig. B-1. <br />Region . <br /> <br />3 Esti~te 2 yr., I-Hr. precip. using aprropriate equation in Tbl. E-l. <br />2 yr., I-Hr. . in. <br /> <br />4 Estimate 2 yr., 10-Day precip. trom Fig. F-2. <br />2 yr., 10-Day . in. <br /> <br />5 Estimate 100 yr.+-2 yr., lO-Day liatio from Fir. B-3. <br />100 yr.-:- 2 yr., 10-Day liatio . . <br /> <br />6 ~ltiply 2yr., 10-Day precip. by ratio in step 5 to obtain <br />100 yr., 10-Day precip. <br />2 yr., 10-Day _ in X liatio _ - in. (100 yr., lO-Day) <br /> <br />7 Multiply 2yr., 10-Day precip. by .66 to convert to annual series. <br />2 yr., 10-Day in X .66 - in (2 yr., lO-Day Ann. Ser.) <br /> <br />6 Plott 2 yr. and 100 yr. precip. on Log-Normal Probability Paper <br />for other frequencies. <br /> <br />, <br />( <br />