Figure Page 21 15 Growth of Urban Areas Depends on Fuel Energy in Many Forms . . . 16 Local Per Capita Governmental Expenses Versus Local Population Size . . 17 Example of a Drainage Canal Allowed to Partially Refill with Vegetation . . 18 Pictorial Diagram of the Hydrologic Cycle . . . . . 19 Geologic Formations and Depths Under- lying McGregor Isles, Lee County . . 20 Generalized Model of the Hydrologic Cycle in Lee County . . . 21 A Detailed Hydrologic Budget of Lee County . . . . . 22 Major Inflows and Outflows of Water in Lee County . . . . 23 Computer Simulation Results of Surface Water Storage in the Caloosahatchee River Area . . . . 24 Computer Simulation Results of Water Storage in the Shallow Aquifer . . 25 Groundwater Storage in Deep Aquifer . . 26 The Production Cycle Including the Interactions with Renewable and Non- Renewable Resources . . . 27 Estimates of Remaining Reserves of Fossil Fuels . . . . 28 Concept of Recycling Waste Water Through Natural Systems . . . 29 More Common Examples of the Free Energies of Nature . . . 30 Simplified Diagram of Lee County's Balance of Payments: Inputs and Outputs of Energy and Money . . . 22 . 24 . 26 . 27 . 28 . 29 . 30 30 30 31 32 33 34 35 36 viii I 31 Distribution of Money and Energy in Lee County . . . . . 32 The Economy of Lee County Showing the Imports, Exports, and Internal Cycling of Energy and Money . . . . 33 Simulation Model of Lee County . . 34 Simulation Results Reflecting Decreasing Fossil Fuel Availability to Lee County . . . . . 35 Simulation Results Reflecting Leveled (at today's rate of consumption) Fossil Fuel Availability to Lee County . . . . . 36 Investment Ratios and Carrying Capacity Diagrams . . . . . (a) United States . . . . (b) South Florida . . . . (c) Lee County . . . . 37 Schematic Diagrams of Water Level Manage- ment Within Lee County . . . (a) Original conditions . . . (b) Present conditions (drained) . . (c) Future alternative of intermediate water levels favoring a balance of man and nature . . . . 38 Schematic Diagrams of Development Patterns . . . . . (a) Natural conditions . . . (b) Full development (present) . . (c) Alternative that takes advantage of existing natural systems with minor alterations for flood control . . 39 Plan for Diversified Development of Six Different Land Uses . . . . 49 49 49 49 50 50 50 I I 50 52 37 39 42 44 44 46 46 46 46