Plates A35-A37 and Plates A39-A41, respectively. The ICWW survey also included 

 transect lines (11 and 32) in the creeks located between the ICWW and the inlet. 



General Observations 



During the neap and spring ADCP and bathymetry surveys, the following observations 

 were made: 



a. During the neap tide intensive ADCP survey the maximum discharges measured 

 through the inlet were about 1,700 cu m/sec on flood and 1,300 cu m/sec on ebb. The 

 spring tide intensive survey measured maximum discharges of 2,200 cu m/sec on flood and 

 1,600 cu m/sec on ebb. In the bay area, approximately half of the flow goes to the south 

 at near maximum flood flows. The remainder of the flow is split between the north bay 

 and the creeks flowing into the ICWW. These creeks are located on ADCP transect lines 

 11 and 32. 



b. There was significant wave action throughout the neap tide measurement period. 

 Waves were breaking over the north jetty almost the whole week, and at high tide, waves 

 were propagating over the jetty causing very rough conditions in the throat of the inlet. 

 The ebb shoal was found to be extremely shallow just seaward and south of the south jetty. 

 As a result, it was very common to have 2.0- to 2.5-m waves breaking in this region. 



c. During both the neap and spring surveys of the ebb shoal area, ebb currents were 

 observed to be deflected to the south near the tips of the jetties. This was probably due to 

 the waves from the northeast. Also evident in the data were reversals in the current 

 directions north and south of the inlet. The somewhat erratic current direction offshore is 

 also influenced by the waves present during the data collection. 



d. Very strong currents were found to exist throughout the entire study area. Current 

 speeds of 60 cm/sec north and south of the inlet in the bays were commonly observed. 

 Peak currents observed in the inlet were approximately 100 cm/sec. 



e. There is a large difference in tidal phase between the water level and current during 

 spring tide. Strong currents in the ebb direction were observed while the water level 

 continued to rise in the bay. The water level had risen substantially from the low tide 

 elevation and the currents were still observed to be in an ebb direction. A similar 

 phenomenon was observed for the falling tide; the water level would decrease and the 

 current continued in the flood direction. 



f The flows in the ICWW were generally observed to be from south to north when the 

 flood currents in the inlet were strong . The flows were from north to south when the ebb 

 currents in the inlet were strongest. 



Appendix A Velocity and Discharge Measurements at Ponce de Leon, FL A 7 



