EM 1110-2-1100 (Part II)
30 Apr 02
Example Problem II-8-2 (Continued)
(b) As a more conservative check on (a), the peak possible value of Hs during the shoaling/breaking
process between deepwater and shore for given values of bottom slope H0'/L0 and H0' was estimated from
Figure II-8-12 using the same values of H0'/L0 and H0' as in (a). Results are summarized in Table II-8-19.
Table II-8-19
Calculation of Upper Bound Hsjetty Based on Maximum During Shoaling
Hsjetty/H0' 1
Tr
Hsjetty
H0'
(yr)
(cm)
(cm)
2
653
1.27
829
5
702
1.27
892
10
737
1.27
936
25
782
1.27
993
50
816
1.27
1036
100
850
1.27
1080
From Figure II-8-12 using bottom slope = 1/100 and H0'/L0 = 0.01.
1
Final design wave heights excluding current effects. Upper bound estimates of Hsjetty (Tables II-8-18 and II-8-19)
are plotted relative to the 165 cases derived from the measured storm events (Figure II-8-29). The return period
curve based on the 165 events is taken as the design curve for this example (Table II-8-20).
Figure II-8-29.
Return period wave heights, 165 events including upper bounds,
jetty head
Example Problem II-8-2 (Sheet 16 of 21)
II-8-50
Hydrodynamic Analysis and Design Conditions
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