Card Variables Format Description 



type 



YRO minimum flows (thousand cubic feet 



per second) 

 YRSCAL scale of flows (thousand cubic feet 



per second per inch) 



Second card 



YVO minimum velocity (feet per second) 



YVSCAL scale of velocities (feet per 



second per inch) 

 SCALE scale factor for total plot size 



IQ IQ = for no plot of inlet 



discharge 



11 If a plot is requested, repeat card types 8 and 9 for observed bay 

 levels to compare with predictions (card type 8 required; use 

 NPTS = for no observed bay levels). Only one set of card types 

 10 and 11 will be required for plotting even though the system 

 modeled may have more than one inlet. 



12 End of file card. 



The inlet data for a computer run of Masonboro Inlet, North Carolina, 

 are shown in Figure A- 3. 



3. Program Output . 



The types of output include: (a) A summary table of grid dimensions, 

 input parameters, and the Helmholtz period of the system estimated assum- 

 ing there is no friction in the inlet; (b) (optional) summary tables of 

 instantaneous inlet hydraulics; (c) (optional) a pen plot of inlet hydrau- 

 lics; and (d) a table summarizing critical points throughout model opera- 

 tion, such as high water, low water, point of maximum discharge, and 

 maximum velocity. Samples of input and output for the Masonboro Inlet 

 run are given in Figures A- 4, A- 5, and A- 6. 



4. Computer Program . 



A listing of the computer program (INLET) follows the sample output. 

 The program was written in FORTRAN IV for a CDC 6600 computer with plotter. 

 Control cards, plotting instructions, and file controls may have to be 

 changed for other computers. If no plotter is available, the subroutine 

 GRPHC and the call to the subroutine in the main program may be removed. 



27 



