TABLE OF CONTENTS
Page
A b stract ... - --- --- -- ------- ----- -------- -- -. 1
Introduction 2-----------..-----.---- .........--------- --- ----- 2
P urpose and scope ---------------- -------------------. 2
A cknow ledgm ents .... ............. . .. ......... ....... 2
Previous investigations 3-----------Geography ----....... .. ............ 3......-------------- -. 3
Location and general features -------........ 3-----C lim a te -- --- --- -- - --- -- -- --- ---- --- -5
Population 5.....................................---------------------- 5
Well-field 6
Facilities----------------------------------------------- 6
Pumpage--------- --- ------- ------------. 6
Ground water---------- ----------- ------------ 6
Hydrologic units 6--------------------------Recharge and discharge ----------------------------------- 12
Hydraulic properties ------ ---------------------------------- 14
Chemical quality of water ---------- -------------- ----- --------- 17
Salt-water leakage from proposed waterway --- ---------- --- 20
Salt-water wedge --------------------- ------------ ----- 21
Coefficient of leakage ------------------- 23
Head differential across confining beds -------------------------------- 23
Head at base of salt-water wedge --------------------------24
Pumping level of piezometric surface ------------------24
Design piezometric surface ---------- 24 Computing the drawdown ---- - ----- 25
Rate of salt-water leakage --------------------- 29
Summary -------- -------------- ---------------------------------------- 31
Conclusions ------ --------------- ------------ -----------------32
References------------------- 33
ILLUSTRATIONS
Figure Page
1 Florida showing the locations of Sarasota County, Venice, and
the Venice well field ------ ----------- 4
2 Monthly pumpage from Venice well field and monthly rainfall
at Venice, Florida, 1952-62 11
3 Geologic cross sections through the west, east, and south lines
of wells of the Venice well field and map showing location of
wells--------------------------------------------------------- Facing 12
4 Generalized geologic section and electrical resistivity log near
Venice well field at site of proposed waterway showing hydrologic units ..- 13
5 Logarithmic plots of the drawdown in well 9N and in well 10
versus t/r2 .........................--.--...- ......---------- -- 15