2.0 -, 



1.8 - 



CM 



E 



1.6 - 



< 

 cc 



i- 

 cc 



< 



X 



o 



H 

 Z 



o 



0. 

 UJ 



< 



1.4 - 



1.2 



5 1.0- 



CO 



3 

 CC 



o 



X 

 Q. 

 CO 

 O 



X 

 Q. 



0.8 



0.6 - 



1900 1920 1940 1960 



YEAR 



1980 



2000 



Figure 44. Phosphorus loading into Lake Pontchartrain, Louisiana, as 

 a function of time. 



100 



