There are two main types of surge: pressure-induced surge and wind-induced surge. The following
calculations are done based on a mid-range category 4 hurricane with wind speeds of 143 mph.
•Pressure-induced
surge
–Dd=-DP/rg=.95
m ~ 3 feet
–
•Wind-induced
surge
Nonlinear
Dd=d1((1+2ts/rgd12*Dx)1/2-1)
Cd=1.21+2.25(1-5.6/U10)2*10-6
–Linear
–
•
•Various
Storm Surge Results for a
Mid-Range Category 4 Hurricane
(143 mph) The
surge calculations are executed by using different
values for d1 and
Dx
|
shear |
14.54794 |
kg-m/s^2 |
|
|
|
r |
1000 |
kg/m^3 |
|
|
|
Cd |
3.4433E-06 |
|
|
|
|
U10 |
65 |
m/s |
143 |
mph |
|
d1 |
1 (m) |
2 (m) |
5 (m) |
10 (m) |
|
Dx |
100 (m) |
500(m) |
1000(m) |
10000 (m) |
|
|
meters |
feet |
|
Dd 1-100 |
0.14 |
0.45 |
|
Dd 1-500 |
0.58 |
1.89 |
|
Dd 1-1000 |
0.99 |
3.25 |
|
Dd 1-10000 |
4.54 |
14.89 |
|
|
|
|
|
Dd 2-100 |
0.07 |
0.24 |
|
Dd 2-500 |
0.34 |
1.12 |
|
Dd 2-1000 |
0.64 |
2.10 |
|
Dd 2-10000 |
3.80 |
12.47 |
|
|
|
|
|
Dd 5-100 |
0.03 |
0.10 |
|
Dd 5-500 |
0.15 |
0.48 |
|
Dd 5-1000 |
0.29 |
0.95 |
|
Dd 5-10000 |
2.39 |
7.85 |
|
|
|
|
|
Dd 10-100 |
0.01 |
0.05 |
|
Dd 10-500 |
0.07 |
0.24 |
|
Dd 10-1000 |
0.15 |
0.48 |
|
Dd 10-10000 |
1.39 |
4.55 |
Wind = 165 mph:
|
|
meters |
feet |
|
Category 5 |
5.36 |
17.61 |