C    FN=RGRETURN.DAT - RETURN FLOW LAG AND EFFICIENCY TABLES
C ------ EFFICIENCY TABLES ------                         
C         TABLE    TABLE    TABLE    TABLE
C MONTH     #1       #2       #3       #4
C -----  ------   ------   ------   ------
   10      0.80     1.00     0.25     0.40
   11      0.80     1.00     0.25     0.40
   12      0.80     1.00     0.25     0.40
    1      0.80     1.00     0.25     0.40
    2      0.80     1.00     0.25     0.40
    3      0.80     1.00     0.25     0.40
    4      0.80     1.00     0.25     0.40
    5      0.80     1.00     0.25     0.40
    6      0.80     1.00     0.25     0.40
    7      0.80     1.00     0.25     0.40
    8      0.80     1.00     0.25     0.40
    9      0.80     1.00     0.25     0.40
C*******************************************
C    RETURN FLOW LAG DATA FILE                        
C DAY/    TABLE    TABLE    TABLE    TABLE
C MONTH     #1       #2       #3       #4
C -----  ------   ------   ------   -----
     1   0.3000    .5000    .01     0.000
     2   0.0000    .0000    .02     0.000
     3   0.0000    .0000    .03     0.000   
     4   0.0000    .0000    .01     0.000   
     5   0.0000    .0000    .01     0.000   
   630   0.0000    .0000    .08     1.000   
     1   0.2500    .2500    .15     0.000   
     2    .2500    .1500    .13     0.000   
     3    .2000    .1000    .11     0.000  
     4    .0000    .0000    .09     0.000   
     5    .0000    .0000    .08     0.000   
     6    .0000    .0000    .07     0.000   
     7    .0000    .0000    .06     0.000   
     8    .0000    .0000    .05     0.000  
     9    .0000    .0000    .04     0.000  
    10    .0000    .0000    .03     0.000  
    11    .0000    .0000    .02     0.000  
    12    .0000    .0000    .01     0.000