Delaware Bay and Charleston Harbor, the two most likely centers of OCS 



support for each region. The following discuss these trajectories: 



Delaware Bay 



Figure 6 shows the map of Delaware Bay used by the computer in 

 the nearshore spill analyses. The shoreline was broken down 

 into 51 subareas. Two spill sites were studied: 



1) One in the upper central bay between Mil ford 

 Neck and East Point (shown in Figure 6); 



2) And the other in the bay entrance midway be- 

 tween Cape Henlopen and Cape May (not shown). 



The wind data used were those from Wilmington, Delaware, for the 

 period 1963 through 1972. In winter, the most likely areas are 

 to the east and southeast with very low probability attached 

 to the north and most of the western shores. Spring exhibits 

 a more diffusive pattern, but once again certain portions of 

 the western shore are low-probability areas. In summer the 

 lower bay is almost untouched, all the impact areas being con- 

 fined to a band in the upper bay area. Autumn is rather similar 

 to spring. In all seasons Egg Island Point is a very high- 

 probability impact area with probability ranging from 29% in winter 

 to 51% in summer. 



It would seem that analyses such as these could be profitably 

 used in the design and deployment of spill containment and 

 collection systems. 



Charleston Harbor 



Figure 7 shows the map of Charleston Harbor used by the computer. 

 >iind data were based on Charleston, South Carolina, weather 

 records, 1963 to 1972. The shoreline was broken down into 

 some 51 areas. A single spill site was studied, located in 

 the center of the main harbor. With minor exceptions, there 

 is very little seasonal dependence as far as the initial 

 impact areas are concerned. They are spread rather evenly over 

 the main part of the harbor. 



Charleston Harbor is much smaller than the other two areas 

 studied, and 60% of the spills are ashore within seven or eight 

 hours. There is little seasonal dependence in the times to 

 shore. Since the distances and times to shore are so small, 

 the results are dominated by the tidal currents and seasonal 

 wind rose properties. 



42 



