0,0 



-0.5 



15 L_l 



A A A 



A 



▲ 



A A 



A 



A 

 A A 



-1.5 



0.0 



1.0 



Watershed index (Improving characteristics) 



Figure 1. Water quality index versus watershed characteristics index for 42 

 permanent network station watersheds (correlation coefficient = 0.74) (Flor- 

 ida State Department of Environmental Regulation 1979b). 



253 



