FLOOD06940

• County: Statewide
• Basin: Statewide
• Title: Corps of Engineers Riprap Guidance
• Date: 7/1/1970
• Prepared By: US Army Corps of Engineers
• Floodplain - Doc Type: Community File

1

EM 1110-2-1601
Appendix IV
1 July 70

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1. C...LCUL....TE ENERGY CORRECTION FACTOR

.

AiI[(CR1n}: Ai]
. ~
[I(CR'1Z)j J Ad
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FROM PL.ATI!!: Cl.l

1l!QUATlON 1Jl-121

....2 =(1...)2 = (I l!I&,t.O) 2 = 3.417'" 10'
I [(CR'/Z)j' "J = 15.00>< 10'
[I (CRIIZ), ...iJ J = (3.IMi x 10J)' = 42.7" 101S

(J.n." 10')(15.00" 10')
CI = = 1.22
42,7"'0'1

2. EFFECT\I,/E II (II Nl!GLI!:CTEOl

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C'''32.5L.OG,o 12.2k'=L:....
..

(EQU"'TION~ (151 AND (Ill)

FOR V = 10.7 AND ~ = 2.3'
- )'"
C = (62.S" ro.71 = 501.7
2.1'

IPL....Te:CZ'-JI

.
FOR C =S40.7, 1"= 3.9
FOR"" 11.' (PLATE m-I)
Ie = 3,03 fO'T

(PLATE 12.;2)

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3. EFFECTiVe: II (.CONSIDEREDI

II va = (!.22ltta.?IZ = 2.17 FT
Z9 66.4

Vi = (........ 2.17)'/2 = 11.1 F~

[(82.51 111.III]'"
C:: = 150.3
2.3'
.
T= S., (PLATE Dl-21

Ie = 2.03 FT FOR I!II = 11.8 I"T

.. CAL.CULATl! MANNINO'S n (Ill NEGLECTEDI

no

1.... iil/S S'll

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(1..86)(j I ,8)21 1(0.0012.)'1 Z
10.7

.0.1)11

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ALPHA IIETHOO
BACK'ATER COIIPUTATIOH OATA

Plate IV-4

IV-9

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