YEAR MEAN, m 



o 85 2.3 



x 80-84 2.0 



JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC 

 MONTH 



Figure 39. Comparison of mean surface water 

 visibility 



0.01 O.tO 1.00 



10.00 23.00 50.00 75.00 00.00 



PERCENT GREATER THAN 



as.oo ee.ao sa.oa 



Figure 40. Distribution of surface water 

 visibility, 1980-1985 



62 



