'> 200 h 



CM 



I 



E 

 O 

 o) 150 



> 

 < 

 CO 



o 



Z> 100 



Q 



O 



DC 



Q. 



y 50" 



100 200 300 400 

 PERCENT of 1960 LOADING 



Figure 9. Summary of the effects of changing inputs of a) herbicides, 

 b) sediments, and c) nutrients on annual net production of 

 submerged aquatic vegetation (SAV). Lines represent the 

 distillation of several simulation scenarios from SAV 

 Ecosystem Management Model (fig. 8). 



151 



