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TABLE OF CONTENTS
Letter of Transmittal ....................--------........................................... ---------------------------------3
Acknowledgments ...........--- ....----------... -.....----------------- -- --------.........- 6
The general setting ......................................................----------------------------------------- 7
Precipitation ............... -- ..------- .............------........... .... --------------------------------8
Streams in northern and central Florida ...................--------------------------.. 9
Ground water -.............................................. ... ..1----------------------------17
Artesian water ................................................. ------------------------------------------ 17
Aquifer functions as a giant reservoir .................------------------------- 20
Aquifer functions as a system of pipelines .............------------------- --.. 24
Chemical quality of ground water ...............------------------------------ 29
Current draft of water has made only minor subtractions
from the total supply .................................................-------------------------------- 31
Studies needed ..........................-------- --------- -------- .------------------ ------- 34
References .............................................. ...................... .....------------------------------ 37
ILLUSTRATIONS
1 Florida's rainfall is plentiful -......... ............. .... -------------------------------9
2 Variations in monthly precipitation at Gainesville ....---------------- 10
3 Variations in yearly rainfall at Gainesville, 1901-1950 ......------------ 11
4 Flow of the Santa Fe River passes underground in a 3-mile
reach between Worthington and High Springs ---------------- 12
5 Flow of Santa Fe River upstream and downstream from its underground reach .................-... ................ ................. --- 13
6 Streams of northern and central Florida and their flow ....----------- 14
7 Size and frequency of floods, Suwannee River near Bell .. -----------15
8 Hardness of stream waters in central and northern Florida -----------16
9 Expanse of the Floridan aquifer ............... ...-.....---------------------------- 18
10 Areas of recharge to the Floridan aquifer .....................--------------------- 19
11 Florida's large springs ------. -.----------------------------------- 20
12 Geology, controls recharge and movement of the water .------------ 21
13 Model explaining the piezometric surface ---------------------- 22
14 Effect of rain on ground-water levels ................... ..------------------------ 23
15 Recharge through sinkhole .... ..................--------------------------------.. 24
16 Typical recharging sinkholes ............................. .......------------------------------ 25
17 Piezometric surface of the Floridan aquifer, 1952 .. .......--------------- 26
18 Areas of artesian flow ------...........----- ...---......-----------------------------------. 27
19 Salty water in the Floridan aquifer .................. ................------------------------- 28
20 Hardness of water from upper part of the Floridan aquifer --------29 21 Artesian pressures have diminished at Jacksonville -------------........... .. -- 30
22 A large spring ceases to flow ...............................................------------------------------ 33
23 Why Kissengen Spring stopped flowing ..................... 34