e. Design Water Level Summary . For purposes of the design problem the 

 following water levels will be used. The criteria used here should not be 

 assumed generally applicable since design water level criteria will vary with 

 the scope and purpose of a particular project. 



(1) Astronomical tide: use + 1.5 m (MLW) (exceeded 1 percent of 

 time) 



(2) Storm surge: 



(3) Wave setup: 



use + 3.0 m 



a function of wave conditions 



Table 8-2. Tidal currents at Delaware Bay entrance (surface currents only). 



1948 values 



1 



^ From NOS Tidal Current Charts for Delaware Bay and River (1948 and 1960) 



and NOS Tide Tables. 

 2 



For spring tides. 



Example charts from National Ocean Service (NOS) (1948 and 1960) and a 

 summary of tidal current velocities are given in Figures 8-7 through 8-10 are 

 given on the following pages. 



3. Wave Conditions. 



a. Wave Conditions on Bay Side of Island (see Ch. 3, Sec. V) . Wave data 

 on waves generated in Delaware Bay are not available for the island site. 

 Consequently, wind data and longest fetch shallow-water wave forecasting 

 techniques will be used to estimate wave conditions. 



The longest fetch at the Delaware Bay entrance 

 Figure 8-11). 



F = 89.3 km (see 



8-12 



