Design Problem Phu sical Environment 



Page no : 



Cnlculolcd by : 

 Checked by: 



Date : 



/3 Of/33 

 J. R. h/. 



2 Mor73 



Nomograph Kief hod (cont) 



Peak Sur g e on Open Coast - Hurricane 5 

 Sj. = 1&.0 ft. 

 ^= 0.9 



Sp= SiFsFm = te.o (o.e)(i.5o) = zu ft 



Note: The computed values of Sp are be h eyed 

 high for the island site since the island 

 is in do ft of vvater and at an eituary 

 entrance; not at the coast as assumed 

 by the nomograph method. 



Estimate of Storm Surge - Reference 5 ^ 



bretschne icier (fief 5) gives an empirical 

 relationship betv^een maximum sustained 

 vvind speed and surge height (both pressure 

 and wind induced) at the Delaware day 

 entrance. (Applicable only to Delov^are &ay) 



Equation 11 from Reference 5 for peak, ujrge 

 (sj = o.oooe>su^ tlo'/o 



'max 



(Ug in mph) 



Hurricane A 



Ur^= O.bGSUmax ^0.5Vp 



6^1= 0.865 (8d.3) -^0.5(25) = 66.3 knots 



(fOZ mph) 



(So) = 0. 0OO65 (lozf = b.b4 ft. 



Hurricane 5 



(^Lax"^ 0.0OO6S (lOlf ^ ?J ft. 



Eq.3'ld 



Ref 5 



Ref. 5 



Eg. 3-54 



8-13 



