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ERRATA
Aug 13, 2010

Errata for “Mathematical Formulations of NRCS 24-Hour Design Storms” by David C. Froehlich

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Publication: Journal of Irrigation and Drainage Engineering
Volume 136, Issue 9
Correct coefficients that correspond to the model given in Eq. (3) and that were used to create all graphs and other information, are provided in Table 1 below, which should replace Table 1 in the paper. Additionally, Eq. (4) should appear as follows:
P̂*(t)={r(ip*io*)[ηem1(rtdt)rem1tdm1td+ηem2(rtdt)rem2tdm2td]+io*(ttd)for0trtd(1r)(ip*io*)[η1em1(trtd)(1r)m1td+η1em2(trtd)(1r)m2td]+io*(ttdr)+rforrtd<ttd}
(4)
Table 1. Optimal Rainfall Intensity Equation Coefficients and Time-to-Peak Intensity Ratios for NRCS 24-h Design Storms
Optimal coefficientsand time-to-peak ratioUnitsNRCS 24-h storm type
Type 1Type 1AType 2Type 3
ip* 22.4084.55339.26125.253
io* 0.4600.6240.3110.268
η 0.08770.1620.05220.106
m1 h1 0.2240.1810.2640.252
m2 h1 4.2580.5434.0983.083
r 0.4100.3060.4930.500

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Go to Journal of Irrigation and Drainage Engineering
Journal of Irrigation and Drainage Engineering
Volume 136Issue 9September 2010
Pages: 675

History

Received: Jul 3, 2009
Accepted: Apr 16, 2010
Published online: Aug 13, 2010
Published in print: Sep 2010

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David C. Froehlich, M.ASCE
303 Frenchmans Bluff Drive, Cary, NC 27513

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