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U.S. Department of the InteriorU.S. Geological Survey
Open-File Report 2013–1141
Prepared in cooperation with Broward County, Florida
Preliminary Stratigraphic and Hydrogeologic Cross Sections and Seismic Profile of the Floridan Aquifer System of Broward County, Florida
800
900
1,000
1,100
1,200
1,300
backup curvescale of 270 to 170µsec/ft
G-2984 (W-19318; test corehole; site 18) LANDMSL: 13 feet
Preliminary Stratigraphic and Hydrogeologic Cross Sections and Seismic Profile of the Floridan Aquifer System of Broward County, Florida
By Ronald S. Reese and Kevin J. Cunningham
Prepared in cooperation with Broward County, Florida
Open-File Report 2013–1141
U.S. Department of the InteriorU.S. Geological Survey
U.S. Department of the InteriorSALLY JEWELL, Secretary
U.S. Geological SurveySuzette M. Kimball, Acting Director
U.S. Geological Survey, Reston, Virginia: 2013
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Suggested citation:Reese, R.S., and Cunningham, K.J., 2013, Preliminary stratigraphic and hydrogeologic cross sections and seismic profile of the Floridan aquifer system of Broward County, Florida: U.S. Geological Survey Open-File Report 2013–1141, 10 p., http://pubs.usgs.gov/of/2013/1141.
iii
Contents
Abstract ...........................................................................................................................................................1Introduction.....................................................................................................................................................1
Purpose and Scope ..............................................................................................................................1Hydrogeologic Setting .........................................................................................................................3
Sources of Data..............................................................................................................................................4Well and Corehole Data .......................................................................................................................4Marine Seismic Data ............................................................................................................................4
Preliminary Stratigraphic and Hydrogeologic Cross Sections and Seismic Profile of the Floridan Aquifer System in Eastern Broward County ..........................................................7
Selected References ....................................................................................................................................7
Figures 1. Map showing location of the study area in southeastern Florida, wells
used in the study, and location of hydrogeologic sections and seismic-reflection profile ............................................................................................................2
2. Chart showing stratigraphic units in the study area, generalized lithology, and correlation to hydrogeologic units .....................................................................................3
3. Uninterpreted seismic-reflection profile along Hillsboro Canal ...........................................5 4. Preliminary interpreted seismic-reflection profile along Hillsboro Canal ..........................6
Plates 1. Hydrogeologic Section A–A’ ............................................http://pubs.usgs.gov/of/2013/1141 2. Hydrogeologic Section C–C’.............................................http://pubs.usgs.gov/of/2013/1141 3. Hydrogeologic Section Z–Z’ .............................................http://pubs.usgs.gov/of/2013/1141
Tables 1. Well identifiers, locations, and construction
information for all wells used in the study ......................http://pubs.usgs.gov/of/2013/1141 2. References for well data compiled for this study ..........http://pubs.usgs.gov/of/2013/1141 3. Stratigraphic boundaries identified from well
data in the study area .........................................................http://pubs.usgs.gov/of/2013/1141 4. Hydrogeologic boundaries identified from
well data in the study area.................................................http://pubs.usgs.gov/of/2013/1141
iv
Conversion FactorsInch/Pound to SI
Multiply By To obtainLength
inch (in.) 2.54 centimeter (cm)inch (in.) 25.4 millimeter (mm)foot (ft) 0.3048 meter (m)mile (mi) 1.609 kilometer (km)
AbbreviationsABI acoustic borehole image (log)APPZ Avon Park permeable zoneASR aquifer storage and recoverybls below land surfaceFAS Floridan aquifer systemGR gamma-rayGWSI Groundwater Site Inventory (database)LF1 uppermost major permeable zone of the Lower Floridan aquiferLFA Lower Floridan aquiferMC1 middle semiconfining unit 1MC2 middle semiconfining unit 2OBI optical borehole image (log)Ω•m ohm-meterRO reverse osmosisSFWMD South Florida Water Management DistrictΔt sonic borehole geophysical log interval transit time, in microseconds per footUFA Upper Floridan aquiferUSGS U.S. Geological Survey
Temperature in degrees Celsius (°C) may be converted to degrees Fahrenheit (°F) as follows:
°F=(1.8×°C)+32
Temperature in degrees Fahrenheit (°F) may be converted to degrees Celsius (°C) as follows:
°C=(°F-32)/1.8
Vertical coordinate information is referenced to the National Geodetic Vertical Datum of 1929 (NGVD 29).
Horizontal coordinate information is referenced to the North American Datum of 1927 (NAD 27) or North American Datum of 1983 (NAD 83).
Altitude, as used in this report, refers to distance above the vertical datum.
*Transmissivity: The standard unit for transmissivity is cubic foot per day per square foot times foot of aquifer thickness [(ft3/d)/ft2]ft. In this report, the mathematically reduced form, foot squared per day (ft2/d), is used for convenience.
Specific conductance is given in microsiemens per centimeter at 25 degrees Celsius (µS/cm at 25 °C).
Concentrations of chemical constituents in water are given either in milligrams per liter (mg/L) or micrograms per liter (µg/L)
AbstractTo help water-resource managers evaluate the Floridan aquifer system (FAS) as an alternative water supply, the U.S.
Geological Survey initiated a study, in cooperation with the Broward County Environmental Protection and Growth Manage-ment Department, to refine the hydrogeologic framework of the FAS in the eastern part of Broward County. This report presents three preliminary cross sections illustrating stratigraphy and hydrogeology in eastern Broward County as well as an interpreted seismic profile along one of the cross sections. Marker horizons were identified using borehole geophysical data and were initially used to perform well-to-well correlation. Core sample data were integrated with the borehole geophysical data to support stratigraphic and hydrogeologic interpretations of marker horizons. Stratigraphic and hydrogeologic units were correlated across the county using borehole geophysical data from multiple wells. Seismic-reflection data were collected along the Hillsboro Canal. Borehole geophysical data were used to identify and correlate hydrogeologic units in the seismic-reflection profile. Faults and collapse structures that intersect hydrogeologic units were also identified in the seismic profile. The information provided in the cross sections and the seismic profile is preliminary and subject to revision.
IntroductionThe Biscayne aquifer of southeastern Florida is shallow and prolific, and has provided most of the water supply in eastern
Broward County during the last century. Concerns about water-level declines and saltwater intrusion in the Biscayne aquifer have limited the increase in municipal withdrawals and restricted the issuance of new water-supply well-field permits. Therefore, Broward County is considering the potential use of the brackish Floridan aquifer system (FAS) as an alternative water supply, either by direct withdrawal from supply wells or by aquifer storage and recovery (ASR, Reese and Alvarez-Zarikian, 2007), reverse osmosis (RO), or blending with freshwater from the Biscayne aquifer. The ability to select new well locations based on aquifer properties conducive to these alternative water-supply technologies requires an improved definition of the stratigraphic and hydrogeologic frameworks. In general, a stratigraphic framework describes the 3-dimensional distribution of stratigraphic units and their boundaries as identified by distinct and pervasive vertical and lateral changes in lithologic characteristics and depositional sequences. Likewise, a hydrogeologic framework describes the 3-dimensional distribution of hydrogeologic units and their boundaries as identified by distinct and pervasive vertical and lateral changes in hydrologic characteristics. The U.S. Geological Survey (USGS), in cooperation with Broward County, initiated a study in 2008 to refine the stratigraphic and hydrogeologic frameworks of the FAS in eastern Broward County to address this need.
Purpose and Scope
The purpose of this report is to present three preliminary stratigraphic and hydrogeologic cross sections and an interpreted seismic profile of the FAS in eastern Broward County (fig. 1) to help water-resource managers evaluate the FAS as an alterna-tive water supply. The cross sections and profile provide a basis for refinement of the existing stratigraphic and hydrogeologic frameworks of the FAS in Broward County (fig. 2) described in Reese and Richardson (2008), including the introduction of subdivisions within the Arcadia and Avon Park Formations. As part of this study, a 1,308-foot-deep test corehole (G-2984) was drilled in northeastern Broward County along Hillsboro Canal (fig. 1). Data collected from G-2984 were interpreted using both a traditional lithostratigraphic approach and a sequence-stratigraphic methodology, and correlated with existing data across the
Preliminary Stratigraphic and Hydrogeologic Cross Sections and Seismic Profile of the Floridan Aquifer System of Broward County, Florida
By Ronald S. Reese and Kevin J. Cunningham
2 Preliminary Stratigraphic and Hydrogeologic Cross Sections and Seismic Profile of the Floridan Aquifer System
PALM BEACHBROWARD
MIAMI–DADEBROWARD
North NewRiver Canal
Hillsboro Canal
C-13 Canal
C-12 Canal
C-11 Canal
C-10 Canal
C-9 Canal
C-14 Canal
ATL
AN
TIC
OC
EA
N
SAWGRASS EXPRESSWAY
FLORID
A’S
TURNPIK
E
Base from U.S. Geological Survey digital data, 1:24,000, datum NAD83Albers Equal Area Conic Projection, Standard parallels 29˚30’” and 45˚30’central meridian -83˚00’
EXPLANATION
G-2989G-2916
2
Hillsboro Canal marine seismic profile tract
Hydrogeologic section line–For this study
Hydrogeologic section line (or part thereof)–From Reese and Richardson, 2008
Well location and–Site number Well numberWell number for well on section
Studyarea
F l o r i d a
Z
Zʹ
Aʹ
AʹA
Cʹ
A
CD
Dʹ
E
Eʹ
Y
Yʹ
YʹY
80°10'80°20'
26°20'
26°10'
26°00'
0 2.5
0 2.5
5 KILOMETERS
5 MILES
17 16
18
8
9
2
28
215
33
610
2730
31
32
25
26 14 13
7
12
11
19
29
20
15
23
2422
4
1
3
G-2970
G-2978G-2979
G-2982G-2983
G-2942G-2943
D-365
G-2887G-2968G-2969
S-567
CS-I1CS-I2CS-M2
SUN-I3SUN-M1SUN-M1ASUN-M2SUN-M3
G-2980PLT-I1PLT-I2PLT-M1
PBP-I1PBP-I2PBP-M1
G-2944G-2945
G-2946G-2989
G-2961G-2962G-2975
G-2917G-2918G-2914
G-2292MAR-I2MAR-M2
G-2889G-2916
FTL-I1FTL-I3FTL-I4FTL-M1FTL-M2
G-2938G-2939G-2940
BCN-I1BCN-I2BCN-I3BCN-I4BCN-I5BCN-I6BCN-M2BCN-M3BCN-M4
PB-1775PB-1776
PB-1765PB-1766PB-1841
G-2981
G-2988HOL-RO1
G-2966G-2967
PLT-ROI1PLT-ROM1
G-2971G-2972
G-2984
G-2987
G-2986
G-2985G-2991
G-2963G-2964G-2976
G-2973G-2974HAL-RO1
75
95
595
1
441
Figure 1. Location of the study area in southeastern Florida, wells used in the study, and location of hydrogeologic sections and seismic-reflection profile. Site numbers and well information are provided in table 1.
Introduction 3
Figure 2. Stratigraphic units in the study area, generalized lithology, and correlation to hydrogeologic units. Subdivisions of the Arcadia and Avon Park Formations defined in this study are informal.
county. Seismic-reflection data acquired along the Hillsboro Canal were used mainly to define hydrogeologic units in profile, and to identify structural features that vertically intersect hydrogeologic units and provide potential pathways for the vertical transport of groundwater in the FAS. Water-quality data obtained from other studies were used to delineate the base of the brackish-water zone within the FAS in the three cross sections. The information provided in the cross sections and the seismic profile will be used to refine the stratigraphic and hydrogeologic frameworks in Broward County. This information should be considered preliminary and subject to revision.
Hydrogeologic Setting
The FAS is the deepest of three principal hydrogeologic units present in the study area and is overlain by the intermediate confining unit and shallow surficial aquifer system (fig. 2). The intermediate confining unit separates the FAS from the surficial aquifer system (fig. 2). The Biscayne aquifer, which is the primary source of freshwater in Broward County, is included within the surficial aquifer system (fig. 2). The FAS in southeastern Florida comprises a thick sequence of highly perme-able carbonate strata of Paleocene to Miocene age and is part of the broad carbonate Florida Platform that extends beneath
Series Geologic formation orlithostratigraphic unit Hydrogeologic unitLithology Approximate
thickness, in feet
Holocene to
Pliocene
Holocene-age undifferentiated and
Pleistocene-age formations1
Quartz sand; silt; clay; shell; limestone; sandy shelly limestone
Surfi
cial
aq
uife
r sys
tem
Biscayne aquifer
200–450 Confining beds
Gray limestone aquifer
Confining unit
Inte
rmed
iate
con
finin
g un
it 35–210
Upper Floridan aquifer (UFA)
40–350
700–
1,20
0
Lower Floridan aquifer (includes permeable zones and confining units)
BoulderZone 400–650
1,700–2,000
Miocene to
possibly Late
Oligocene
Eocene
Mid
dle
PaleoceneCedar Keys Formation
Dolomite and dolomitic limestone
Massive anhydrite beds Sub-Floridan confining unit
Tamiami Formation2
Stock Island Formation3
Silt; sandy clay; sandy, shellylimestone; calcareous sand-stone; and quartz sand/ plankticforaminiferal limestone
Haw
thor
n Gr
oup
PeaceRiver
Formation
Interbedded sand, silt,gravel, clay, carbonate,and phosphatic sand
Arca
dia
Form
atio
n Carbonate mudstone to grainstone; claystone; shell beds; dolomite; phosphatic and quartz sand; silt; and clay
Sandy, molluscan limestone; phosphatic quartz sand, sandstone, and limestone
Flo
ridan
aq
uife
r s
yste
m
Avon
Par
k Fo
rmat
ion
Fossiliferous, lime mudstoneto packstone and grainstone; dolomitic limestone; anddolomite; abundant cone-shaped benthic foraminifera
Oldsmar Formation
500–830
1,200?
Avon Park permeable zone
Early
Middle semiconfining unit 2 (MC2)
Upper
Lower
Upper
35–310LF1
Middle semiconfining
unit 1 (MC1)
Lower
Lower
Focu
s of
this
stu
dy
Upper
Mid
dle
Micritic limestone, dolomitic limestone, and dolomite
344–670
150–500
EXPLANATIONUppermost major permeable zone of the Lower Floridan aquifer
LF1
? ? ?
1 Pleistocene-age formations in southeastern Florida (Pamlico Sand, Miami Limestone, Anastasia Formation, Fort Thompson Format2 Tamiami Formation (Pinecrest Sand Member, Ochopee Limestone Member).3 Stock Island Formation, after Cunningham and others, 1998.
4 Preliminary Stratigraphic and Hydrogeologic Cross Sections and Seismic Profile of the Floridan Aquifer System4
peninsular Florida. In descending order, the FAS has generally been divided into the Upper Floridan aquifer (UFA), the middle confining unit or middle semiconfining units (MC1 and MC2), and the Lower Floridan aquifer (LFA) (Miller, 1986). Reese and Richardson (2008) identified a permeable unit within the middle semiconfining unit, specifically, the Avon Park permeable zone (APPZ, fig. 2). Permeable units of the Lower Floridan aquifer include the uppermost major permeable zone of the Lower Floridan aquifer (LF1) and the Boulder Zone (fig. 2).
Sources of DataWell data acquired for this study and existing well data (fig. 1) were used to delineate hydrogeologic units in the upper
part of the FAS. Lithostratigraphic and sequence-stratigraphic units were identified in the sections and form the foundation of the stratigraphic framework. Seismic-reflection data were recorded along Hillsboro Canal (fig. 1), interpreted, and used for delineation of hydrogeologic, lithostratigraphic, and sequence stratigraphic units.
Well and Corehole Data
Information from 84 wells at 33 sites (fig. 1; table 1) was used to construct cross sections and maps of stratigraphic and hydrogeologic units. This information includes data obtained from previously drilled wells and from test corehole G-2984, drilled by the Florida Geological Survey for this study. Well identification, location, and construction information were compiled from a series of well construction reports (table 2). The data are stored in the USGS Groundwater Site Inventory (GWSI) database and can be accessed using the USGS local well identifiers (table 1).
Test corehole G-2984 (site 18) was continuously cored from the surface into the UFA to a depth of 1,308 feet (ft) below land surface. Stratigraphic markers were identified using core samples from G-2984 and correlated with optical and acoustic borehole images (OBIs and ABIs, respectively). Standard borehole geophysical data also collected from G-2984 include natural gamma-ray (GR) activity, caliper, induction resistivity, spontaneous potential, single point resistance, borehole-fluid conduc-tivity and temperature, and sonic-interval transit time (sonic Δt) (plate 1). Logs of these types of geophysical data were used to indicate vertical changes in the rock, fluid properties, or both, within G-2984, and to correlate identified markers and units with those in other wells. Recognizable patterns in the borehole geophysical logs were used to correlate stratigraphic or hydrogeo-logic units between wells (plates 1, 2, and 3). Sonic Δt data collected in G-2984 provide information about relative porosity of the hydrogeologic units and spinner flowmeter data were used to locate flow zones.
Borehole geophysical data were also acquired in three additional FAS wells for this investigation, (G-2916 at site 2 and G-2939 and G-2940 at site 6; fig. 1, table 1) and include OBI, caliper, spinner flowmeter, borehole fluid properties, and induc-tion resistivity data. Borehole geophysical data from other previously drilled wells were compiled and include GR, caliper, spontaneous potential, dual-induction and shallow resistivity, sonic Δt, borehole fluid properties, and spinner flowmeter data. In addition, existing borehole image data collected by commercial logging companies, including acoustic televiewer and formation microresistivity images, were used in this investigation.
Lithology and depositional sequences were described for cores from test corehole G-2984 and well PB-1766, and for cuttings from well G-2968 (plate 1). A total of 255 ft of FAS core material was recovered in the 355-ft interval in well G-2984; a total of 43 ft was recovered in the 248-ft intervals in well PB-1766. Additional lithologic data from wells in the study area were compiled from (1) the Florida Geological Survey online lithologic database (http://www.dep.state.fl.us/geology/gisdata-maps/litholog-temp.htm), (2) South Florida Water Management District (SFWMD) well-construction reports available at the DBHYDRO website (http://www.sfwmd.gov/portal/page/portal/xweb%20environmental%20monitoring/dbhydro%20applica-tion), and (3) SFWMD technical reports (table 2). Because lithologic descriptions provided by well-construction reports are generally based on cuttings, lithologic information from these sources was only used to support stratigraphic and hydrogeologic interpretations based on borehole geophysical data.
Marine Seismic Data
Digital, high-resolution, multichannel, water-based seismic-reflection data were acquired by the Walker Marine Geophysical Company along approximately 14 miles of the Hillsboro Canal as part of another USGS study with Broward County. These data were correlated with borehole geophysical data, OBI data, and lithologic descriptions from test corehole G-2984 and wells PB-1766 and PB-1775 (figs. 1, 3 and 4). Stratigraphic units, including some depositional sequences, and hydrogeologic units identified in the three wells were correlated with seismic reflections displayed on the 2-dimensional seismic profile (figs. 3 and 4). A sequence boundary that has been mapped regionally coincides with the top of the Arcadia Formation (Cunningham and others, 1998).
Sources of Data 5
Figu
re 3
. Un
inte
rpre
ted
seis
mic
-ref
lect
ion
prof
ile a
long
Hill
sbor
o Ca
nal (
fig. 1
).
WES
TEA
STPB
-176
6PB
-177
5G-
2984
0
200
Depth below canal water level, in feet
Depth below canal water level, in feet
400
600
800
1,00
0
1,20
0
1,40
0
0
100
200
300
400
500
600
700
1,60
0
1,80
0
2,00
0
2,20
0
2,40
0
2,60
0
2,80
0
3,00
0
0 200
400
600
800
1,00
0
1,20
0
1,40
0
1,60
0
1,80
0
2,00
0
2,20
0
2,40
0
2,60
0
2,80
0
Two-way traveltime, in milliseconds0 10
0
200
300
400
500
600
700
Two-way traveltime, in milliseconds
AIV=5,569 ft/s AIV=7,899 ft/s AIV=10,030 feet per second (ft/s)
AIV=6,159 ft/s AIV=6,508 ft/s AIV=10,030 feet per second (ft/s)
Shot
poi
nt
41,100
41,000
40,900
40,800
20,400
20,300
20,200
20,100
20,000
500
400
300
200
0
100
30,800
30,700
30,600
30,500
30,400
30,300
30,200
30,100
10,30010,20010,10010,000
30,00020,500
Verti
cal s
cale
gre
atly
exa
gger
ated
2 M
ILES
0
2 KI
LOM
ETER
S0
1
1
EXPL
AN
ATIO
N
Aver
age
vert
ical
-int
erva
l vel
ociti
es s
how
n on
righ
t and
left
side
s
Noi
sy, l
ow-a
mpl
itude
ver
tical
ban
ds—
Prob
ably
cau
sed
by e
nerg
y at
tenu
atio
n at
or n
ear t
he c
anal
bot
tom
AIV
Whi
te-l
ine
anom
alie
s—M
ost o
ccur
from
top
to b
otto
m o
f the
pro
file
and
wer
e ca
used
by
acqu
isiti
on d
urin
g pa
ssag
e un
der b
ridge
s an
d pi
pelin
es.
This
can
cau
se th
e on
boar
d na
viga
tion
syst
em to
lose
con
nect
ion
to
navi
gatio
nal s
atel
lites
6 Preliminary Stratigraphic and Hydrogeologic Cross Sections and Seismic Profile of the Floridan Aquifer System
No data
EAST
Depth below canal water level, in feet
0 200
400
600
800
1,00
0
1,20
0
1,40
0
1,60
0
1,80
0
2,00
0
2,20
0
2,40
0
2,60
0
2,80
0
WES
TPB
-176
60
200
Depth below canal water level, in feet
400
600
800
1,00
0
1,20
0
1,40
0
0
100
200
300
400
500
600
700
1,60
0
1,80
0
2,00
0
2,20
0
2,40
0
2,60
0
2,80
0
3,00
0
Two-way traveltime, in milliseconds0 10
0
200
300
400
500
600
700
Two-way traveltime, in milliseconds
AIV=5,569 ft/s AIV=7,899 ft/s AIV=10,030 feet per second (ft/s)
AIV = 6,159 ft/s AIV = 6,508 ft/s AIV = 10,030 ft/s
Top
low
erAr
cadi
aFo
rmat
ion
G-29
84PB
-177
5
Och
opee
Och
opee
Lim
esto
neLi
mes
tone
Mem
ber
Isla
ndFo
rmat
ion
Stoc
k
Mem
ber
Och
opee
Och
opee
Lim
esto
neLi
mes
tone
Mem
ber
Mem
ber
Uppe
rmos
t per
mea
ble
zone
of L
ower
Flo
ridan
aqu
ifer
Shot
poi
nt
41,100
41,000
40,900
40,800
20,400
20,300
20,200
20,100
20,000
500
400
300
200
0
100
30,800
30,700
30,600
30,500
30,400
30,300
30,200
30,100
10,30010,20010,10010,000
30,00020,500
CS-4
CS-6
CS-7
CS-5
Top
Pine
cres
t San
dM
embe
r
Uppe
rFl
orid
anaq
uife
r
Top
Arca
dia
Form
atio
n
Top
Peac
e Ri
ver
Form
atio
n
Avon
Par
kpe
rmea
ble
zone
Top
AP1
sequ
ence
CS-2
CS-1
CS-3
1Is
land
Form
atio
n
Stoc
k
1
Inte
rmed
iate
conf
inin
g un
it
Mid
dle
conf
inin
g un
it 1
Mid
dle
conf
inin
g un
it 2
Unna
med
se
quen
ce
boun
dary To
p AR
4se
quen
ce
EXPL
AN
ATIO
N
Sem
i-ve
rtic
al fa
ults
—Co
mm
on w
ithin
the
limits
of t
he
stru
ctur
al s
ags.
Das
hed
whe
re m
ost u
ncer
tain
Aver
age
vert
ical
-int
erva
l vel
ociti
es s
how
n on
righ
t and
left
side
s
Seis
mic
-sag
str
uctu
re a
nd n
umer
atio
n
Trun
catio
n of
refle
ctio
ns—
At th
e up
per s
urfa
ce o
f the
Arc
adia
For
mat
ion
AIV
CS-1
1 St
ock
Isla
nd F
orm
atio
n, a
fter C
unni
ngha
m a
nd o
ther
s, 1
998.
Verti
cal s
cale
gre
atly
exa
gger
ated
2 M
ILES
0
2 KI
LOM
ETER
S0
1
1
Figu
re 4
. Pr
elim
inar
y in
terp
rete
d se
ism
ic-r
efle
ctio
n pr
ofile
alo
ng H
illsb
oro
Cana
l (fig
. 1).
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Selected References 7
Preliminary Stratigraphic and Hydrogeologic Cross Sections and Seismic Profile of the Floridan Aquifer System in Eastern Broward County
The cross sections and interpreted seismic profile presented herein are part of a study to refine the stratigraphic and hydrogeologic framework of the FAS in Broward County. Most of the stratigraphic and hydrogeologic units in eastern Broward County delineated here are based on Reese and Richardson (2008). The cross sections presented here provide greater vertical and lateral resolution of the distribution of hydraulic characteristics deemed important to consider in planning alternative water-supply practices. In addition, subdivisions within the Avon Park and Arcadia Formations are introduced, including the upper, upper-middle, lower middle and lower Avon Park Formation, and the upper and lower Arcadia Formation (fig. 2). Sequence stratigraphic units are also introduced, including AP1, AP2, AR1, AR2, AR3, and AR4 (plates 1, 2, and 3). Stratigraphic and hydrogeologic units were identified based on geophysical, lithologic, and hydraulic characteristics, and in the case of deposi-tional sequences, the character of bounding surfaces. Stratigraphic boundaries in the upper part of the FAS were identified by distinct vertical changes in lithology observed in core samples from test corehole G-2984 and correlated with marker horizons identified in borehole geophysical logs (table 3). Where lithologic changes could not be identified or lithologic data were unavailable, characteristic patterns in borehole geophysical data, such as gamma-ray logs, sonic Δt logs, or both, were used to identify distinct and pervasive geophysical marker horizons that reflect changes in lithology.
In the study area, boundaries between hydrogeologic units in the FAS were determined using borehole-flowmeter and fluid-property data, borehole geophysical data, hydraulic test data (such as from aquifer and packer tests), well-to-well correla-tive relations, and drilling characteristics (table 4). Hydrogeologic units may be composed of one or more flow zones that were typically identified by abrupt and substantial changes in vertical borehole flow or borehole fluid properties (temperature, conductivity, or both). Where hydraulic test data or borehole flowmeter and fluid properties data were not available, hydrologic unit boundaries were based on correlation of other data between wells, including lithologic descriptions and borehole geophys-ical data. The geophysical data included formation resistivity, sonic Δt, natural gamma ray, borehole diameter, and spontaneous potential.
West-to-east cross sections A–A’ and C–C’ (plates 1 and 2), and south-to-north cross section Z–Z’ (plate 3) show the correlation of stratigraphic and hydrogeologic units between wells in the study area. Borehole flowmeter analyses were used to indicate discrete flow zones within the intervals tested. Observed lithologic characteristics are shown for cored intervals in test corehole G-2984 and well PB-1766 as well as for well cuttings in well G-2968. Other lithologic information shown is based on well-cutting descriptions compiled from sources listed in table 2. Depositional sequences and the base of the brackish-water zone in the FAS are shown on these cross sections.
Selected References
AECOM, 2010, Engineering report on the construction and testing of test production well TPW–1 for the Town of Davie: Prepared for the Town of Davie, p. 1–1 to 5–2, plus apps.
Bennett, M.W., Linton, P.F., and Rectenwald, E.E., 2001, Completion report for the exploratory well EXW-1, western Hillsboro basin site, Palm Beach County: South Florida Water Management District hydrogeologic investigation of the Floridan aquifer system, 34 p., 7 app.
Black, Crow, and Eidsness Inc., 1974, Results of drilling and testing of monitoring and deep disposal wells at Margate, Florida: Engineering report prepared for the City of Margate Utilities Authority and LAH Associates, Limited, Fla., 31 p.
Camp, Dresser, and McKee, Inc., 1987, City of Plantation deep injection well—number 1: Final well completion report, p. 1–1 to 5–1, plus apps.
Camp, Dresser, and McKee, Inc., 1991a, City of Plantation Central District Water Treatment Facility R.O. reject disposal well - no. 1: Well completion report v. 1.
Camp, Dresser, and McKee, Inc., 1991b, City of Plantation Regional Wastewater Treatment Plant effluent injection well - no. 2: Well completion report v. 1, p. 1–0 to 6–1.
Camp, Dresser, and McKee, Inc., 1993a, Floridan aquifer test/production well and monitor well: Completion report prepared for the City of Deerfield Beach, Florida, and South Florida Water Management District, 29 p.
8 Preliminary Stratigraphic and Hydrogeologic Cross Sections and Seismic Profile of the Floridan Aquifer System
Camp, Dresser, and McKee, Inc., 1993b, Wastewater Treatment Plant III well completion report dual zone monitor well 1A: Engineering report prepared for City of Sunrise, Fla., p. 1–0 to 5–2, plus apps.
Camp, Dresser, and McKee, Inc., 1993c, Wastewater Treatment Plant III well completion report dual zone monitor well 2: Engineering report prepared for City of Sunrise, Fla., p. 1–0 to 5–2, plus apps.
Camp, Dresser, and McKee, Inc., 1996, Engineering report supporting operational testing of IW-3 at Sunrise, Florida: Engineer-ing report prepared for City of Sunrise, Fla., v. 1, p. 1–1 to 8–3, plus apps.
Camp, Dresser, and McKee, Inc., 2008, City of Deerfield Beach West Water Treatment Plant concentrate injection well system: Well completion report, v. 1, p. 1–1 to 7–1, plus apps.
Camp, Dresser, and McKee, Inc., 2010, City of Deerfield Beach West Water Treatment Plant Floridan aquifer well no. 2 final completion depth proposal: Memorandum to the South Floridan Water Management District, 6 p.
CH2M HILL, 1984, Engineering report on drilling and testing of the deep injection and monitoring wells at the City of Margate Wastewater Treatment Plant: Prepared for the City of Margate Department of Utilities Margate, Florida, p. 1–1 to 4–4, plus apps.
CH2M HILL, 1985, Engineering report on the drilling and testing of the City of Sunrise injection and monitoring wells: Prepared for the City of Sunrise, Broward County, Florida, p. 1–1 to 5–1, plus apps.
CH2M HILL, 1994, Report on the modification to monitor well MW-2: Prepared for the City of Margate Department of Envi-ronmental and Engineering Services, 7 p.1–1 to 1–9, attachments.
CH2M HILL, 1995, Rehabilitation of monitor well MW-1 and construction and testing of monitor well MW-2 and regional monitor well RMW-1 at the G.T. Lohmeyer Wastewater Treatment Plant: Engineering report prepared for the City of Fort Lauderdale, Broward County, Fla., p. 1–1 to 6–2, plus apps.
CH2M HILL, 1996, Construction and testing of monitor well MW-3 at the G.T. Lohmeyer Wastewater Treatment Plant: Engi-neering report prepared for the City of Fort Lauderdale, Broward County, Fla., p. 1–1 to 6–1, plus apps.
CH2M HILL, 1997, Construction and testing of the aquifer storage and recovery (ASR) system at the BCOES 2A Water Treat-ment Plant: Engineering report prepared for the Broward County Office of Environmental Services and Montgomery Watson, p. 1–1 to 6–3, 13 apps.
CH2M HILL, 1999, Construction and testing of injection well IW-4 at the City of Fort Lauderdale G.T. Lohmeyer Wastewater Treatment Plant: Engineering report prepared for the City of Fort Lauderdale, v. I, p. 1–1 to 6–1, plus apps.
CH2M HILL, 2000, Injection well system injection zone redefinition at the Margate Wastewater Treatment Plant: Engineering report prepared for the City of Margate, Broward County, Florida, p. 1–1 to 1–7, plus attachments.
Cunningham, K.J., McNeill, D.F., Guertin, L.A., Ciesielski, P.F., Scott, T.M., and deVerteuil, Laurent, 1998, New tertiary stratig-raphy for the Florida Keys and southern peninsula of Florida: Geological Society of America Bulletin, v. 110, no. 2, p. 231–158.
Florida Geological Survey, 2012, Lithologic database: Accessed December 11, 2012, at http://publicfiles.dep.state.fl.us/FGS/WEB/lithologic/.
Geraghty and Miller, Inc., 1984, Construction and testing of disposal wells 1, 2 and 3 at the George T. Lohmeyer Plant Fort Lauderdale, Florida: Report prepared for Broward County, v. I, 39 p., plus app.
Geraghty and Miller, Inc., 1986, Construction and testing of an injection well at the Coral Springs Improvement District: Report prepared for Broward County, Fla., 30 p., plus apps.
Geraghty and Miller, Inc., 1990a, Construction and testing of injection wells #1 and #2 with associated deep monitor well #1, Broward County North District Regional Wastewater Treatment Plant: Report prepared for James M. Montgomery, Consult-ing Engineers, Inc. in association with Hazen and Sawyer, P.C, Engineers, 30 p., plus apps.
Geraghty and Miller, Inc., 1990b, Construction and testing of injection well system #2 at the Coral Springs Improvement District Wastewater Treatment Plant: Report prepared for the City of Coral Springs, Fla., 31 p., plus apps.
Selected References 9
Geraghty and Miller, Inc., 1991, Construction and testing of injection wells #3 and #4 with associated deep monitor well #2, Broward County North District Regional Wastewater Treatment Plant: Report prepared for James M. Montgomery, Consulting Engineers, Inc. in association with Hazen and Sawyer, P.C, Engineers, 32 p., plus apps.
Geraghty and Miller, Inc., 1995, Construction and testing of injection well #2 at the Pembroke Pines Wastewater Treatment Plant: Report prepared for the City of Pembroke Pines, Fla., 23 p., plus apps.
Hazen and Sawyer, P.C., 1989, Completion report for the City of Hallandale Floridan aquifer test well: City of Hallandale, Fla.
Hazen and Sawyer, P.C., 1996, City of Miramar, Florida Utilities Department Wastewater Reclamation Facility injection well construction: Well construction report prepared for the technical advisory committee members, p. 1–1 to 4–4, plus apps.
Hazen and Sawyer, P.C., 1999, North Regional Wastewater Treatment Plant monitor well 4 construction completion report: Prepared for Broward County Office of Environmental Services, p. 1–1 to 4–1, plus apps.
Hazen and Sawyer, P.C., 2000, Injection wells 5 and 6 construction completion report, North Regional Wastewater Treatment Plant: Prepared for Broward County Office of Environmental Services, p. 1–1 to 5–4, plus apps.
Hazen and Sawyer, P.C., 2001, Injection well no. 1 construction completion report—Water/Wastewater Treatment Plant: Prepared for Cooper City Utility Department, p. 1–1 to 5–5, plus apps.
Hazen and Sawyer, P.C., 2002a, Engineering well completion report concentrate disposal system: Prepared for the City of Pompano Beach in association with Water Technology Associates, Inc., p. 1–1 to 5–5, plus apps.
Hazen and Sawyer, P.C., 2002b, Underground Injection Control application, aquifer storage and recovery Class V injection well system at the Broward County 2A Water Treatment Plant Site: 4 p., plus apps.
Hazen and Sawyer, P.C., 2003, Engineering well completion report, Hollywood Southern Regional WWTP injection well effluent disposal system: Prepared for the City of Hollywood in association with Water Technologies Associates, Inc., p. 1–1 to 5–5, plus apps.
Hazen and Sawyer, P.C., 2006, Engineering well completion report—Peele-Dixie Water Treatment Plant concentrate disposal well: Prepared for City of Fort Lauderdale, p. 1–1 to 5–5, plus apps.
Hazen and Sawyer, P.C., 2007, Engineering well completion report Hallandale Beach WTP concentrate disposal well: Prepared for the City of Hallandale Beach, p. 1–1 to 5–5, plus apps.
Hazen and Sawyer, P.C., 2008, City of Plantation Regional Wastewater Treatment Plant engineering well completion report for dual zone monitoring well: Prepared for City of Plantation, p. 1–1 to 4–3, plus apps.
Hazen and Sawyer, P.C., and Geraghty and Miller, Inc., 1981, Construction and testing of the test injection well, City of Fort Lauderdale, Florida: Final report prepared for EPA project C-120474-220 city project 7089, 61 p., plus apps.
Lukasiewicz, John, 2003, Floridan aquifer system test well program, C-13 Canal, Oakland Park, Florida: South Florida Water Management District Technical Publication WS-16, 49 p., plus apps.
Malcolm Pirnie, Inc., 1990, City of Hollywood Water Treatment Plant Floridan aquifer test well: p. 1–1 to 7–1, plus apps.
Malcolm Pirnie, Inc., 2009, Technical memorandum detailing installation of test production wells F1 and F2: City of Miramar, Fla., p. 1–1 to 5–1, plus apps.
Metcalf and Eddy, Inc., and Missimer International, Inc., 2000, City of Plantation East Water Treatment Plant concentrate injection well no. 1 completion report, v. 1: Prepared for City of Plantation Utilities, Plantation, Fla., 81 p., plus apps.
Miller, J.A., 1986, Hydrogeologic framework of the Floridan aquifer system in Florida and in parts of Georgia, Alabama, and South Carolina: U.S. Geological Survey Professional Paper 1403–B, 91 p.
Missimer and Assoc., Inc., 1992, Technical memorandum on the construction and testing of well F-2, City of Hollywood, Florida: Prepared for Metcalf & Eddy, Inc., 32 p., plus apps.
Montgomery Watson, 1996, City of Miramar Western Water Treatment Plant Injection Well System, Injection Wells IW-1 and IW-2 and Monitor Well DZMW-1: Prepared for the City of Miramar, Florida, 2 reports and plus apps.
10 Preliminary Stratigraphic and Hydrogeologic Cross Sections and Seismic Profile of the Floridan Aquifer System
Montgomery Watson, 1997, Modification of monitor well MW-1A at the Sawgrass Wastewater Treatment Plant: Report prepared for the City of Sunrise, Fla., plus apps.
Montgomery Watson, 1998a, Springtree Water Treatment Plant aquifer storage and recovery system well construction report: Prepared for the City of Sunrise, Florida, p. 1–1 to 5–1, 13 apps.
Montgomery Watson, 1998b, Fiveash Water Treatment Plant aquifer storage and recovery system well construction report: Prepared for the City of Fort Lauderdale, Florida, p. 1–1 to 6–1, 14 apps.
Montgomery Watson Americas, Inc., 1999, Sawgrass Water Treatment Plant concentrate disposal system report and appendix I: Prepared for City of Sunrise, Florida, p. E-2 to 6–14, plus apps.
Montgomery Watson Americas, Inc., 2007, Sawgrass Water Treatment Plant Floridan Blending Test Well: Sunrise Project no. 06–005 final report, 24 p., plus apps.
Palm Beach County Water Utilities Department, 2003, Eastern Hillsboro Canal Water Treatment Plant #9 aquifer storage and recovery well: Well construction report and operational testing request, p. 1–1 to 4–1, 16 apps.
Post, Buckley, Schuh and Jernigan, Inc., 1987, Engineering report for deep test/injection well and deep monitor well: Prepared for the City of Pembroke Pines, Broward County, Fla., p. 1–1 to 11–4, plus apps.
Reese, R.S., and Alvarez-Zarikian, C.A., 2007, Hydrogeology and aquifer storage and recovery performance in the Upper Flori-dan aquifer, southern Florida: U.S. Geological Survey Scientific Investigations Report 2006–5239, 110 p., plus apps. (on CD).
Reese, R.S. and Richardson, Emily, 2008, Synthesis of the hydrogeologic framework of the Floridan aquifer system and delinea-tion of a major Avon Park permeable zone in central and southern Florida: U.S. Geological Survey Scientific Investigations Report 2007–5207, 60 p., plus apps. and pls. (on CD).
Manuscript approved June 24, 2013
Prepared by the Raleigh Publishing Service Center Mike Deacon, Editor Ron Spencer, Illustrations Kim Swidarski, LayoutFor more information about this publication, contact: Ronald S. Reese USGS Florida Water Science Center 7500 SW 36th St Davie, Florida 33314 (954) 377-5900
Or visit the USGS home page at:http://fl.water.usgs.gov/
Reese and Cunningham—
Preliminary Stratigraphic and H
ydrogeologic Cross Sections and Seismic Profile of the Floridan A
quifer System—
OFR 2013-1141