INC Number o£ time steps between saving o£ surge 

 results in HYDk, UCMk and VCMk. INC must be 

 an even integer number. 



DXI Grid increment in meters in the S* direction. 



DETA Grid increment in units of meters in the T* direc- 

 tion. The units of DTDET-DETA (that is, v-AT*) are 

 in meters. 



DELT 



GRAV 



IHk,JHk 

 k=l,2..6 



Time increment in seconds. DELT must be less 

 than that required for numerical stability and, 

 also, be an even integer multiple of 60 minutes. 



Acceleration due to gravity (=9.8 meters per 

 second squared) . 



Dimensionless seabed drag coefficient (=0.0025). 



Grid point location for saving the computed water 

 level. The sum of the indexes must be odd. Index 

 IHk cannot exceed IM. Index JHk cannot exceed JM. 



ITk,JTk 

 k=l,2..6 



CORIO 



PHI 



PINF 



Grid point location for saving the vertically 

 averaged water velocities. The sum of the 

 indexes must be even. Index ITik cannot exceed 

 IM. Index JTlc cannot exceed JM-1. 



Coriolis parameter (=6.70875 x 10 ^ second ^) 

 for latitude 27° 23.232' N. 



Wind ingress angle in units of degrees. 



Far field atmospheric pressure in millibars 

 (=1016 millibars). 



Comments 



1. A symmetric analytical hurricane wind field representation 

 as given by C. Jelesnianski (1965, A numerical calculation 

 of storm tides induced by a tropical storm impinging on a 

 continental shelf, Mon. Wea. Rev., 94_, 379-394) is 

 employed in the surge model) . 



2. The wind stress coefficients, K]^ and K2 , are 1.1 x 10"^ 

 and 2.5 x lO'^ and are defined in SUBROUTINE FLUX. 



3. Constants YRANGE, THIT, XHIT and YHIT are not used in 

 this program version. 



43 



