25
Duration in hours
over a 25 year period
15000
10000
20
5000
4000
3000
2000
15
1000
100
20
16
8
10
4
5
2
4
6
8
10
Hs [m]
Figure A16. Expected Hs Tp durations (in hours) over a 25-year life
cycle based on measured waves offshore of Grays Harbor
25
20
Damage Rate (Stones / hr / 30 m)
2.8
15
2.4
2
1.6
10
1.2
0.8
5
0.4
0
2
4
6
8
10
Hs [m]
Figure A17. Empirical damage function expressing number of stones
removed per 30 m of spur per hour of storm for each
Hs - Tp combination
A23
Appendix A
Stability Analysis of a Submerged Spur, North Jetty, Grays Harbor, WA
Previous Page
