Table 4. Synthesis of 1975 socioeconomic and natural system energy flow data 

 for Hillsborough County (all energy flows in 10 caloric coal equivalent per 

 year) (Sipe et al . 1979) 



Flow Description 



JNI Sum of climatic energies available to natural ecosystems (sun, 

 rain, wind) = 312.9 (Swaney 1978) 



JN2 Sum of climatic energies available to agro-ecosystems (sun, rain, 

 wind) = 581.0 (Swaney 1978) 



JN3 Sum of climatic energies available to urban systems (sun, rain, 

 wind) = 224.4 (Swaney 1978) 



JFF Total fossil fuel input to county functions = 3,677.0 (U.S. 

 Department of Agriculture 1977) 



JPRC Price function of fuel, which regulated fuel input to the county 



JFA Fossil fuel input to agriculture = JFF-JFU-JFD = 3,671.0 (Florida 

 State Energy Office 1978a, 1978b; Tampa Electric Company 1976) 



JFD Annual depreciation of fuel stocks = 77 



J13 Feedback from natural sector stocks to natural sector production = 

 2,360. 20% of gross primary production (Lieth and Whittaker 1975) 



J14 Usuable climatic energy to natural sector = JNI 



J15 Input from natural to urban sector = 1.6 (Bureau of Economic and 

 Business Research 1977) 



J 16 Input from phosphate to urban sector = 326 (Bureau of Economic and 

 Business Research 1977) 



J17 Depreciation of natural sector (vertical heat loss) = 124.5 

 (Swaney 1978) 



J18 Input from agriculture to urban sector = 250 (U.S. Department of 

 Agriculture 1977) 



J19 Usable climatic energy to agricultural sector = JN2 



J20 Depreciation to agricultural section (vertical heat loss) = 231 

 (Swaney 1978) 



J21 Sum of inputs to marine system = 90.4 (Heath and Wimberly 1971) 



(Continued) 

 297 



