FIGURES 



Number Page 



Recreation and Tourism 



1 Mean annual rainfall and temperature 166 



2 State preserves, forests, and parks 167 



3 State aquatic preserves 168 



4 State wildlife management areas 169 



5 National seashores, memorials, monuments, historic sites, 

 marine sanctuaries, estuarine sanctuaries, wilderness areas, 

 forests, parks, wildlife refuges, and preserves 172 



Environmental Issues and Regulations 



1 Water quality index versus watershed characteristics index 



for 42 permanent network station watersheds 253 



2 Environmentally endangered lands 259 



3 Contamination of the groundwater system by 



waste disposal practices 261 



4 Underground injection control program classification of wells . . 262 



Energetics Models of Socioeconomic Systems 



1 Energy circuit diagramming symbols 280 



2 Energy flow model of wood and coal as fuel sources for a foundry . 282 



3 Energetics model of a farm illustrating 



the interaction of energy and money 283 



4 Coal equivalent calories per dollar of 



gross national product per year 285 



5 Basic Hillsborough County model 287 



6 Simplified subsysten model of Hillsborough 



County national production system 289 



7 An evaluated model of the Hillsborough County natural system . . . 290 



8 Energetics model of Hillsborough County natural system 

 illustrating the translation of the model into 



differential equation form 292 



9 Detailed energy model of Hillsborough County 294 



10 Simulation result of Hillsborough County 

 model with constantly increasing relative 



imported fuel price and a price jump 299 



11 Simulation result of Hillsborough County model with 

 constantly increasing relative fuel prices and a price 



jump and with increasing fuel surcharge beginning in 1973 .... 300 



12 Simulation result of Hillsborough County 

 model with technical innovation such as 



energy conservation implemented in 1983 301 



13 Energy ratios 303 



14 Yield ratios of coal-fired and oil-fired electric power plants . . 304 



TV 



