with average monthly difference in rainfall and evaporation at
Orlando 76 36 Hydrographs for wells near Bithlo and Hiawassee Road showing
pattern of fluctuation of the water table 84 37 Relationship between water levels at Bithlo and rainfall at Orlando 89 38 Configuration and altitude of the top of the Floridan aquifer in
Orange County, Florida_ 92 39 Depth below land surface to the top of the Floridan aquifer in
Orange County, Florida 93 40 Distribution of reported cavities in Floridan aquifer in Orange
County, Florida "96 41 Relationship between water levels in the upper and lower zones of
the Floridan aquifer at Orlando 97 42 Hydrograph of well 833-120-3 showing effects of pumpage in the
Orlando well fields -98 43 Configuration and altitude of the piezometric surface in the lower
zone of the Floridan aquifer in the Orlando area 99 44 Relation between dissolved solid and hardness of water depths of
wells in the Orlando area 100 45 Piezometric surface and areas of artesian flow of the Floridan
aquifer in Florida, July 6-17, 1961 101 46 Contours of the piezometric surface at high-water conditions,
September 1960 102 47 Contours of the piezometric surface at about normal conditions,
July 1961 103 48 Contours of the piezometric surface at about normal conditions,
December 11-17, 1963 104 49 Contours of the piezometric surface at extreme low water conditions, May 1962 105 50 Piezometric surface relative to land surface datum, at high water
conditions, September 1960, Orange County Florida 107 51 Piezometric surface relative to land surface datum, at low-water
conditions, May 1962, Orange County, Florida ___ ---_ 108 52 Hydrographs of wells __109 53 Range of fluctuation of the piezometric surface from September
1960 to May 1962, Orange County, Florida 110 54 Recharge areas to the Floridan aquifer in Orange County, and
selected adjacent areas, Florida __ Facing p. 112 55 Dissolved solids in water from wells that penetrate the Floridan
aquifer, Orange County, Florida 114 56 Hardness of water from wells that penetrate the Floridan aquifer,
Orange County, Florida 119 57 Chloride concentration in water from wells that penetrate the
Floridan aquifer, Orange County, Florida 120 58 Composition of mineral content of water from selected wells in the
Floridan aquifer 123 59 Temperature of ground water in Orange County, Florida 125 60 General areas where bacterially polluted water has been reported
from some wells. (After unpublished map prepared by Charles W.
Sheffield, Orange County Health Department)_ 130
viii