ILLUSTRATIONS Figure Page 16. Areas of artesian flow from the Floridan aquifer system, Brevard and Indian River counties ......... 31 17. Floridan aquifer system potentiometric surface, Brevard and Indian River counties ................. 32 18. Estimated transmissivity of the upper Floridan aquifer system, Brevard and Ind ia n R ive r co unties ....................................................................................................................... 33 19. Top of the sub-Floridan confining unit, Brevard and Indian River counties ................................ 34 20. Top of the middle confining unit in central Brevard County ......................................................... 36 21. Thickness of the middle confining unit of the Floridan aquifer system for the injection wells in Brevard and Indian River counties ............................................................................................ 37 22. Top of the lower Floridan aquifer system, Brevard and Indian River counties ........................... 39 23. Thickness of the lower Floridan aquifer system, Brevard and Indian River counties ................. 40 24. Top of the Boulder Zone, Brevard and Indian River counties ................................................... 41 25. Average fracture density for several common rock types naturally deformed in the sam e physical environm ent ........................................................................................................ 44 26. Hypothetical hydrogeologic conditions which could result in vertical flow of different waters ......... 45 27. Response of water in a well penetrating a confined aquifer to oceanic tidal loading ................. 47 28. The effects of oceanic tidal loading and barometric loading of water levels in the D. B. Lee injection and monitor wells ......................................................................................... 48 29. Comparison of hydraulic head values between the two Harris Corporation monitor wells ...... 50 30. Comparison of hydraulic head values between the two Port Malabar monitor wells ................. 51 31. Comparison of hydraulic head values over time between the D. B. Lee injection a nd m o n ito r w e lls ............................................................................................................................ 5 2 32. Background readings for the D. B. Lee injection and monitor wells prior to the first inje ctio n te st .............................................................................................................................. 5 3 33. Results of the first D. B. Lee injection test ................................................................................. 54 34. Recovery of D. B. Lee injection and monitor wells after the first injection test ........................... 55