20 
RANGE NO. 5 
MIOOLE HARBOR 
15 
10 
0 
SS) 
(oa) 
icp) 
SS 
oO 
oO 
oy 
Ow 
x 
| ol 
ious 
O 
@ 
=) 
& 
——— > Time of max wind - EXISTING CONDITION 
B= Time of max wind - CASE 1 
=3(0) -25 20) 215 10) 
aT [lst wae ol Gee ae aol) a hee a a | amma | ea | | 
5230 5240 S250 $260 $270 $280 $290 5300 $310 $320 $330 $340 $350 
TIME, HR 
Figure 16. Discharge through Range 5 for Case 1 
for the three layers (or levels). Plates 59-61 at hr 5283 show currents at low 
water, plates 62-64 show mid-tide flood currents at hour 5298, plates 65-67 
show slack highwater currents at hr 5301, and plates 68-70 show ebb currents 
at hr 5304. These current snapshots can be compared with results for Cases 2 
and 3, as the patterns are very similar to those of the existing condition tests. 
Case 2: Winds from the Southeast 
The wind speed and direction for this case are based on a prototype event 
of 15-18 December 1987. Figure 18 shows the large pressure drop associated 
with this system. Figure 19 shows wind speed and direction derived from 
smoothing the actual data. The winds start at 5242 hr and build up over 18 hr 
from zero speed to a maximum of 31 mph, which remains constant for 6 hr 
from a direction of 115 deg. During the next 36 hr, wind speed drops to 
12.5 mph and direction changes to 0 deg (from the north). Thereafter, the 
northerly winds continue at 10 mph. The timing of peak winds was selected 
to be in phase with the flood tide. 
For this case, discharges across major ranges were compared with those 
for existing conditions; that is, results for the model calibration with summer 
winds (Plates 71-77, see Figure 14 for locations). Comparisons show that the 
effects of winds predominate over those of tides. Over a 40- to 60-hr period 
from 5240 to 5300 hr, there is only net inflow up to 350,000 cfs through the 
east breakwater gap (Plate 77) and net outflow through Angel’s (Plate 71) and 
Queen’s Gates (Plate 76) with maximum flows of 280,000 and 165,000 cfs, 
respectively. In the outer harbor, flow is directed west during this period 
Chapter 5 Model Simulations 
