Inlet survey 



On 18 September, the inlet survey was conducted at a peak spring tide. Table A9 

 summarizes the discharges. The total number of transect lines monitored in the inlet area 

 were identical to those from the neap tide survey. However, due to extreme wave and 

 current interactions, the outside (seaward) lines were determined to be too dangerous to 

 run. Transect lines 8 and 9, which determined the splitting of the flow to the north and 

 south bay areas, were monitored at or near periods of peak ebb and flood flow conditions. 



Ebb shoal surveys 



The ebb shoal depth-averaged velocity vector data are plotted in Plates A29 and A34. 

 The number of lines monitored during this period was reduced to five from the original 

 eight. The five transect lines that were monitored include: 77, 80, 81, 82, and 83. Line 

 77 extends eastward from the jetty. The remaining four lines are oriented from north to 

 south and are nearly perpendicular to the axis of the main channel. Each data set for these 

 five lines required approximately 2.5 hr to complete. During the ebb flow condition, the 

 waves (swell) were about 1 m high and from an east-northeast direction. At the beginning 

 of the flood tidal survey, the waves (swell) were about 0.5 m high from the east. The 

 depth-averaged velocity vector Plates depict the maximum currents near the jetties. 

 Further away from the end of the jetties, the influence of the waves appears to override the 

 tidal current velocities. 



North and south bay surveys 



North and south bay channel surveys were performed on flood and ebb tide. The total 

 number of transect lines surveyed in these areas was reduced from those from the neap tide 

 survey period. This reduction in transect lines was done to provide adequate time to 

 complete the north bay channel section. The omitted lines were near and similar to 

 adjacent lines so that no vital information was lost. The north and south bay channel 

 surveys were usually started by monitoring transect lines 96, 4, and 30, in that order, to 

 determine the flow distribution between the inlet, the south channel, and the north channel, 

 respectively. During the flood flow conditions in the north bay area, the transect lines at 

 the extreme north end of the bay were not surveyed in order that measurements of 

 velocities in the ICWW areas could be obtained. The ebb flow data in the south bay are 

 shown in Plates A23 and A24, while the flood flow data are shown in Plates A27 and A28. 

 The north bay ebb flow data are shown in Plates A30-A33 and the flood data are shown in 

 Plates A39-A41. 



ICWW survey 



The reach of the ICWW located between the confluences with the north and south bay 

 channels was surveyed for ebb and flood tidal conditions on 17 and 19 September, 

 respectively. The velocity vector plots for the data obtained on these dates are shown in 



A6 Appendix A Velocity and Discharge Measurements at Ponce de Leon, FL 



