climate associated with an incident wave climate of intensity Hg and return 

 period defined as 



«T("s) = xp -V(H^)] ^^^^ 



6. The upper limit of integration H is taken as the H^. ' value 

 corresponding to a probability of exceedance in any year of 0.0000001. The 

 lower limit of integration is the U, value below which losses are assumed 

 as zero. The extrapolation of FCH^) to values of Hg below that originally 

 used as a threshold for data to derive the e and * parameters is probably 

 conservative, but this question will be the subject of further study. The 

 choice of the threshold H^ as equal to Hj^^ would resolve any problems, 

 however. The integration between H^^ and H is approximated numerically 

 by an application of Simpson's rule with 100 intervals. 



Program input 



7. The program BWL0SS2 is completely interactive in its present form. 

 It is written in FORTRAN IV as implemented on the US Army Engineer Waterways 

 Experiment Station (WES) Honeywell DPS-8 mainframe system, but it is easily 

 adaptable to microcomputer systems. 



Sample Interactive Session 



8. The following sample interactive session demonstrates the required 

 user input: 



INPUT JLmx for loss CURVE: $L(Hs)=»Luxf (l-EXPIAIHs-HLo))) 



INPUT HLo, THE MAXIHUH HAVE HEIGHT FOR NHICH LOSSES ARE NEGLIGIBLE 



=2.8 



INPUT A, THE REGRESSION COEFFICIENT 



=-.m 



INPUT AVERAGE NUMBER OF EXTREMAL EVENTS PER YEAR, 



THE POISSON "LAMBDA" PARAMETER 



=4.0 



INPUT THE NUMBER OF TRANSMITTED WAVE HEIGHT, 



RETURN PERIOD DATA POINTS YOU HAVE. 



=3 



INPUT THE DATA POINTS-ONE AT A TIME. 



INPUT TRANSMITTED WAVE HEIGHT, COMMA, THEN RETURN PERIOD IN YEARS 



=2.0,20 



=2.7,50 



=4.0,100 



PRINT RESIDUAL TABLES(Y/N)? 



=Y 



C3 



