January - April 1978. Dominant signals were found in the 6 day band 

 and 3 day band. However, the Gulf -wide signal, tjq, can also be 

 observed in the simulated hydrographs from stations on the northern 

 part of the shelf. Figures 58 and 59 show hydrographs from 

 Apalachicola and Cedar Key obtained from the HURl simulation. It is 

 obvious from these two figures that other modes of response exist on 

 the Florida shelf . 



b) Simulated hydrographs 



The following discussions are ordered according to the selected 

 paths starting from PATHl through PATH5. Within each path, results 

 obtained from the storms of small radius are presented first followed 

 by that of the large radius storms. 



The time sequence of the computed water levels at Galveston 

 obtained from the simulation of HURl is shown in Fig. 60. The 

 initial rise of water level which reaches a maximum of 0.22 m at 

 approximately 1300 h on day 4 is well-defined. Resurgence after the 

 peak surge with an oscillation period of about 6 h is also 

 noticeable. 



The initial peak of water level in the Galveston hydrograph is 

 in phase with the first maximum of the tjq signal as shown in Fig. 61. 

 The first extreme of rj^, which is also the maximum peak, occurs 

 approximately 24 h after the storm entered Yucatan Strait. The 

 average period of this signal is 30 h. This mode is not only present 

 in the hydrographs from all stations but also accounts for almost all 

 of the response in the southwest sector of the Gulf as shown in Figs. 



Ill 



