1.0 



0.5 



0.0 



-0.5 



-1.0 



A A A A 



A A A 



▲ 

 A A 



A A A 



A 



•1.5 



-2 



-1.5 



0.0 



1.0 



Watershed Index (Improving characteristics) 



Figure 18. Water quality index versus watershed characteristics index for 42 

 Permanent Network Station watersheds (correlation coefficient = .74) (Florida 

 Department of Environmental Regulation 1979). 



173 



