U.S. GEOLOGICAL SURVEY

Open-File Report 99-190

Water-Quality and Discharge Data for 

St. Joseph Bay, Florida, 1997-98

Prepared in cooperation with the

Florida Department of Environmental Protection
U.S. GEOLOGICAL SURVEY

Open-File Report 99-190

Water-Quality and Discharge Data for

St. Joseph Bay, Florida, 1997-98

Prepared in cooperation with the

Florida Department of Environmental Protection

By Marian P. Berndt and Marvin A. Franklin

Tallahassee, Florida

1999
U.S. DEPARTMENT OF THE INTERIOR

BRUCE BABBITT, Secretary

U.S. GEOLOGICAL SURVEY

Charles G. Groat, Director

For additional information write to: Copies of this report can be purchased

from:

U.S. Geological Survey

Branch of Information Services

Box 25286

Denver, CO 80225-0286

The use of firm, trade, and brand names in this report is for identification purposes 

only and does not constitute endorsement by the U.S. Geological Survey.

District Chief

U.S. Geological Survey, WRD

Suite 3015

227 North Bronough Street

Tallahassee, FL 32301
Contents iii

CONTENTS

Abstract.................................................................................................................................................................................. 1

Introduction ........................................................................................................................................................................... 1

Purpose and Scope....................................................................................................................................................... 2

Description of the Study Area ..................................................................................................................................... 2

Methods ................................................................................................................................................................................. 2

Historical Data....................................................................................................................................................................... 4

Ground-Water Quality ................................................................................................................................................. 4

Surface-Water Quality ................................................................................................................................................. 5

Water Levels in Wells .................................................................................................................................................. 6

Discharge Data, October 1997 and March 1998 ................................................................................................................... 7

Water-Quality Data for St. Joseph Bay, October 1997 and March 1998............................................................................... 7

Turbidity ...................................................................................................................................................................... 9

Temperature ................................................................................................................................................................. 10

Specific Conductance .................................................................................................................................................. 10

Dissolved Oxygen........................................................................................................................................................ 10

pH ................................................................................................................................................................................ 10

Summary................................................................................................................................................................................ 11

References ............................................................................................................................................................................. 11

Appendix ............................................................................................................................................................................... 14

FIGURES

1. Map showing location of St. Joseph Bay and wells with water-quality and water-level data ..................................... 3

2. Hydrographs for two wells near St. Joseph Bay, 1974-90 ........................................................................................... 6

3. Graphs showing gage heights for St. Joseph Bay and Panama City Beach, and estimated discharge in St. Joseph 

Bay for October 29, 1997 and March 3, 1998.............................................................................................................. 7

4. Map showing location of water-quality measuring points in St. Joseph Bay .............................................................. 8

5. Graphs showing turbidity, temperature, specific conductance, dissolved oxygen, and pH measurements in 

St. Joseph Bay, October 29, 1997 and March 3-4, 1998.............................................................................................. 9

TABLES

1. Summary of water quality in the surficial and intermediate aquifer systems and the Upper Floridan aquifer in 

Gulf County, Florida, 1986-94 ..................................................................................................................................... 5

2. Surface-water quality from the Chipola River distribution canal, the Gulf County Canal, and St. Joseph Bay near 

St. Joseph Spit .............................................................................................................................................................. 6

3. Temperature, pH, specific conductance, dissolved oxygen, and turbidity in St. Joseph Bay, October 29, 1997 and

March 3-4, 1998 ........................................................................................................................................................... 10
iv Contents

CONVERSION FACTORS, VERTICAL DATUM, ABBREVIATIONS 

AND ACRONYMS 

Equations for temperature conversion between degrees Celsius (°C) and degrees Fahrenheit (°F):

°C = 5/9 (°F-32)

°F = 9/5 (°C) +32

Sea level: In this report, “sea level” refers to the National Geodetic Vertical Datum of 1929 (NGVD

of 1929)--a geodetic datum derived from a general adjustment of the first-order level nets of both the

United States and Canada, formerly called Sea Level Datum of 1929.

Acronyms and additional abbreviations used in report:

ADCP Acoustic Doppler Current Profiler

ft/sec feet per second

mg/L milligrams per liter

NTUs nephelometric turbidity units

Multiply By To obtain

Length

foot (ft) 0.3048 meter

mile (mi) 1.609 kilometer 

Flow Rate

cubic foot per second (ft3

/s) 0.02832 cubic meter per second
Introduction 1

Water-Quality and Discharge Data for St. Joseph Bay, 

Florida, 1997-98

By Marian P. Berndt and Marvin A. Franklin

Abstract

Historical data were compiled on water 

quality and water levels for the St. Joseph Bay area 

to assess quality of possible sources of landderived water into the Bay. Ground-water quality 

data were compiled from Florida Department of 

Environmental Protection and surface-water quality data were compiled from U.S.Geological Survey files. Water-quality and water-level data were 

measured during two sample collection periods in 

October 1997 and March 1998 to determine waterquality and discharge rates in St. Joseph Bay under 

two sets of flow conditions. Measurements in the 

Bay included water level, temperature, pH, specific conductance, dissolved oxygen, and turbidity.

Median pH in water from the surficial, intermediate and Floridan aquifer systems ranged from 

4.8 to 7.8, and median specific conductance values 

were less than 500 microsiemens per centimeter. 

Median nutrient concentrations--nitrate plus 

nitrite, ammonia and phosphorus--in the three 

aquifers were less than 0.5 milligrams per liter. 

The median pH was 7.0 and the median specific 

conductance was 81 microsiemens per centimeter 

for two samples from the Chipola River distribution canal. Water level data were obtained for several wells near St. Joseph Bay but only two wells 

yielded sufficient data to plot hydrographs. 

Measurements in St. Joseph Bay during the 

October and March collection periods were similar 

for pH and turbidity but differed for temperature, 

specific conductance and dissolved oxygen. The 

median temperature was 20.6 degrees Celsius in 

October and 15.4 degrees Celsius in March, 

median specific conductance was 39,500 microsiemens per centimeter in October and 43,300 

microsiemens per centimeter in March, and 

median dissolved oxygen was 7.6 milligrams per 

liter in October and 8.3 milligrams per liter in 

March. The range in water levels over a tidal cycle 

in St. Joseph Bay on October 29, 1997 was about 

1 foot. During a 24-hour tidal cycle on October 29, 

1997, estimated hourly discharge varied from 

about -116,000 cubic feet per second (ft3/s) (into 

the Bay) to about +110,000 ft3/s (out of the Bay). 

During a 24-hour tidal cycle on March 3, 1998, the 

water level change was about 1.3 feet and estimated hourly discharge varied from about -

132,000 ft3/s (into the Bay) to about 

+121,000 ft3

/s (out of the Bay). 

INTRODUCTION

Fresh ground-water discharges into nearshore 

marine or estuarine environments can affect geochemistry of these waters and can also alter conditions for 

aquatic organisms. In October 1997, a study was 

initiated by the U.S. Geological Survey in cooperation 

with the Florida Geological Survey of the Florida 

Department of Environmental Protection to determine 

the general flow and quality of water in St. Joseph Bay 

under varying flow conditions. Results of this study 

will provide background information needed for an 

assessment of the effects of submarine ground-water 

discharges on the nearshore environment of St. Joseph 

Bay.
2 Water-Quality and Discharge Data for St. Joseph Bay, Florida, 1997-98

Purpose and Scope

The purpose of this report is to describe the 

historical data available for the area adjacent to St. 

Joseph Bay, Florida, and to describe the results of water 

quality, physical properties, water level and discharge 

measurements taken in October 1997 and March 1998. 

The water-quality and physical properties measured in 

the Bay include temperature, pH, specific conductance, 

dissolved oxygen, and turbidity. The geographical area 

covered includes St. Joseph Bay and southern Gulf 

County, Florida (about 5 miles inland from the Bay). 

Description of the Study Area

St. Joseph Bay is located at the southern edge of 

Gulf County on the northwestern Gulf of Mexico coast 

in Florida (fig. 1). According to Rupert (1991), the Bay 

is "a non-estuarine lagoon formed between St. Joseph 

Spit and mainland Gulf County." The Bay is 11 miles 

long and ranges from 3 to 5 miles in width. Water 

depths range from less than 2 meters at the southern, 

closed end to approximately 10 meters near the northern end (Rupert, 1991, p.10).

Because no streams directly discharge to the 

Bay, the main freshwater input is presumed to be from 

the Gulf County Canal, precipitation, and discharge 

from the underlying confined Upper Floridan aquifer 

and adjacent shallow ground water, probably the surficial aquifer system. Estimates for Upper Floridan aquifer discharge rates for the St. Joseph Bay area range 

from 0.5 to 2 inches per year (in/yr) (Bush and 

Johnston, 1988). Net precipitation, defined as the 

difference between precipitation and lake evaporation, 

for the St. Joseph Bay area are estimated between 8 and 

9 in/yr (Visher and Hughes, 1975). The Gulf County 

Canal is approximately 5.5 miles long and links the 

Intracoastal Waterway to St. Joseph Bay. A major 

contribution to the Canal is from the city of Port St. Joe 

sewage treatment plant. In 1995, the annual average 

discharge to the Canal from the sewage treatment plant 

was 57 cubic feet per second (ft3

/s)—the minimum 

monthly average discharge was 48 ft3/s in July and the 

maximum was 65 ft3

/s in (Marella, 1999). 

METHODS

A boat-mounted broad band acoustic Doppler 

current profiler (ADCP) was used to measure discharge 

in St. Joseph Bay at the tip of St. Joseph Spit. The 

ADCP uses the Doppler effect by bouncing an ultrasonic sound pulse off small particles of sediment and 

other zooplankton (scatterers) that are present in the 

water column (Simpson and Oltmann, 1992). The Doppler effect refers to the frequency change of the transmitted sonar signal caused by the relative movement 

between the ADCP and the scattering material in the 

water column (RD Instruments, 1992). Since the scattering material is moving at the same velocity as the 

water, the magnitude of the Doppler effect is directly 

proportional to the current velocity (RD Instruments, 

1992). By sampling segments of the returning sonar 

signal in successive time increments, the instrument 

measures velocities in depth cells (acoustic signals 

from shallow cells return to the ADCP before signals 

from deeper cells, thus earlier segments of the signal 

correspond to shallower data) (Grubbs and Pittman, 

1997). The area of these depth cells is determined by 

the ADCP as it measures elapsed time and velocity of 

the boat relative to the estuary or stream bottom.

There are several limitations to the ADCP technology. The ADCP must estimate discharge measurements near the surface, bottom, and at the sides of the 

transect where the water is too shallow or boat placement is not possible. Also, possible measurement 

errors increase when the velocity of the water is minimal as in slack tide conditions. High wind and wave 

action also increase measurement error. Unfortunately, 

one or both of these conditions were present during the 

two sampling efforts. At times, rocking of the boat 

caused the meter head to come partially or completely 

out of the water. In October 1997, velocities were very 

low, thus measurement errors were very high and precluded meaningful estimation of discharge from the 

velocities measured. In March 1998, velocities were 

low but a little higher than in October, but high winds 

rocking the boat caused measurement errors again to be 

too great to estimate discharge. The measurements 

made with the ADCP are available for inspection at the 

U.S. Geological Survey Florida District Office in Tallahassee, Fla.
Methods 3

FDEP AMBIENT WELL

USEPA STORET WELL

FDEP AMBIENT WELL WITH

WATER LEVEL DATA

EXPLANATION

Gulf County Canal

Chipola River distribution canal

Waterway

Intracoastal

St. Joseph Bay

Apalachicola

River

Lake Wimico

St. Joseph

Spit

Gulf of Mexico

Port St. Joe

USAF Well

DF-A

Paper

Company

Well

St. Vincent

Island

GULF COUNTY

FRANKLIN COUNTY

BAY

COUNTY

29°45′

29°37′30′′

29°52′30′′

85°22′30′′ 85°07′30′′ 85°15′

Location of

Study Area

Panama

City

Beach FLORIDA

0 1 2 3 4 MILES

Figure 1. Location of St. Joseph Bay and wells with water-quality and water-level data.
4 Water-Quality and Discharge Data for St. Joseph Bay, Florida, 1997-98

Because of these problems with the ADCP, an 

alternative method was used to determine flow rates 

into and out of St. Joseph Bay. Discharge into and out 

of St. Joseph Bay were based on estimated changes in 

Bay volume per unit time. This was accomplished by 

multiplying the water level change in the Bay by the 

surface area of the Bay at sea level;

where

Q = discharge

= change in water volume in Bay per unit time

A = surface area of the Bay at sea level (approximately 1.85 X 109 square feet)

= change in water level per unit time

These calculations are based on the assumption 

that the surface area of the Bay is constant with changes 

in water levels. But the surface area of the Bay at water 

levels above sea level is probably greater than the surface area at sea level; thus discharge values based on 

water levels above sea level are probably slightly 

underestimated. Also, the surface area of the Bay at 

water levels below sea level is probably less than the 

surface area at sea level, and discharge values based on 

water levels below sea level are probably slightly overestimated. Wind effects and differential water buildup 

due to wind action could influence the accuracy of 

these volumetric estimates.

Stage data collected in October was compromised by placement of the temporary staff gage near 

heavy boat traffic. In March, the temporary gage was 

better positioned and reliable stage data was collected. 

The March stage data was compared to water levels 

recorded by the National Oceanic Atmospheric Administration at Panama City Beach (National Oceanic 

Atmospheric Administration, 1998a), the nearest site 

with tides similar to St. Joe Bay (U.S. Geological Survey, 1970). Water levels from Panama City Beach 

matched the stage data collected at St. Joseph Bay on 

March 3, 1998. Thus, water levels from Panama City 

Beach on October 29, 1997 were used to estimate discharge on October 29, 1997.

Water quality and physical properties in St. 

Joseph Bay were measured using multi-probe waterquality data loggers. Measurements were made from 

boats on October 29, 1997 and March 3, 1998. Measurements were made at selected intervals using probes 

lowered into the water at three depths. Descriptive and 

nonparametric statistics were used in this report to 

summarize turbidity, specific conductance, temperature and pH values and concentrations of dissolved 

oxygen. The nonparametric Wilcoxon rank-sum test 

(SAS Institute, Inc., 1990; Helsel and Hirsch, 1992) 

was used to test for differences in values or concentrations between data collected October 29, 1997 and data 

collected March 3, 1998.

HISTORICAL DATA

Water quality data were obtained from several 

sources. Historical ground-water quality data for Gulf 

County was obtained from the Florida Department of 

Environmental Protection’s Division of Water Facilities, Ambient Monitoring Section (Florida Department 

of Environmental Protection, 1998). Surface-water 

quality data were obtained from U.S. Geological Survey water-quality data files and from USEPA STORET 

data (available as statistical summaries including minimum, maximum and mean). Historical data were 

obtained from 1974 through 1997.

Ground-Water Quality

Historical ground-water quality data were available from the three major aquifer systems in Florida, 

the surficial, intermediate and the Floridan. Data from 

the Upper Floridan aquifer was available from the 

Floridan aquifer system. The three aquifer systems 

have different natural chemical characteristics and 

show no signs of contamination in the data available. 

The data were collected from wells selected in ‘background’ areas; areas of known contamination were 

avoided (Maddox and others, 1992), so contamination 

is not likely to be found.

The thirty water samples from the surficial aquifer system were all collected from a single well 

(located in the city of Port St. Joe) that is 36 feet deep. 

The water is characterized by low pH (median 4.8), low 

dissolved solids concentration (median of 46 milligrams per liter [mg/L]) and low specific conductance 

(median of 41 microsiemens per centimeter (μS/cm) 

(table 1). The median total organic carbon concentration was 13.6 mg/L. Nutrient concentrations--nitrate 

plus nitrite, ammonia and phosphorus--were all low. 

The median ammonia concentration was the only one 

of the three above the detection limit.

Q dV

dt ------ Adh

dt = = -----,

dV

dt ------

dh

dt -----
Historical Data 5

Water from the intermediate aquifer system was 

collected from 7 wells with depths ranging from 70 to 

330 feet. The water is characterized by neutral pH 

(median of 7.3), median dissolved solids concentration 

of 205 mg/L and median specific conductance of 

405 μS/cm. The median total organic carbon concentration was 4.7 mg/L. Median nitrate plus nitrite concentration was below the detection limit, median 

ammonia was 0.25 mg/L and the median phosphorus 

concentration was 0.02 mg/L.

Water samples from the Upper Floridan aquifer 

were collected from 7 wells with depths ranging from 

338 to 654 feet. The water is characterized by neutral 

pH (median 7.8), median dissolved solids concentration of 340 mg/L, and median specific conductance of 

484 μS/cm. The median total organic carbon concentration was 4.6 mg/L. As in the surficial aquifer system, 

median nitrate plus nitrite and phosphorus concentrations were below detection limits. The median ammonia concentration was 0.36 mg/L. 

Surface-Water Quality

Surface-water quality data were limited in either 

the number of parameters reported or the number of 

samples taken; thus, the assessment of surface-water 

quality was limited. Data were available for three sampling points--St. Joseph Bay (near St. Joseph Spit), the 

Gulf County Canal and a distribution canal for the 

Chipola River (just north of the city of Port St. Joe). 

Although data for numerous samples were available 

(more than 100) for the Bay and the Gulf County Canal, 

only temperature, ph, dissolved oxygen, and turbidity 

values were reported (table 2). In contrast, only three 

samples were available for the distribution canal, but 

many water-quality constituents were measured 

(table 2). Mean temperatures were similar (about 

23 degrees Celsius) in the Gulf County Canal and St. 

Joseph Bay and were about three degrees higher than 

the mean in the distribution canal for the Chipola River. 

Similarly, mean pH values in the Gulf County Canal and 

St. Joseph Bay were 8.2 and 8.3 mg/L, respectively, and 

the mean pH in the distribution canal was 7.0. No other 

parameters were measured at all three sites.

The mean concentrations of dissolved oxygen 

were similar in the Gulf County Canal and St. Joseph 

Bay, 7.6 and 8.3 mg/L, respectively. Mean turbidity values differed for the two sampling points, 43.4 nephelometric turbidity units (NTU’s) in the Gulf County Canal 

and 10.9 NTU’s in the Bay. The higher values in the Gulf 

County Canal probably reflect the proximity of the site 

to the land-derived sources of sediment. 

In a report summarizing surface-water quality in 

northwestern Florida, Hand and others (1996) 

described the water quality in St. Joseph Bay as "essentially composed of the clear, saline waters of the Gulf 

of Mexico." Hand and others also state that discharges 

from the Port St. Joe wastewater treatment plant are 

diluted in St. Joseph Bay by the "good-quality bay 

water." In the Bay near the Gulf County Canal, however, "cloudy water has decreased seagrass coverage."

Table 1. Summary of water quality in the surficial and intermediate aquifer systems and the Upper Floridan aquifer in Gulf 

County, Florida, 1986-94

[Concentrations are in milligrams per liter unless otherwise noted; °C, degrees Celsius; μS/cm, microsiemens per centimeter; --, not available]

Surficial Aquifer System Intermediate Aquifer System Upper Floridan Aquifer

N Median Minimum

Maximum N Median MinimumMaximum N Median MinimumMaximum

Depth of well (feet) 1 36 36 36 7 180 70 330 7 525 338 654

Temperature (°C) 30 22.5 21 24 19 22.9 21.2 26 15 25.2 24 28.9

pH (pH units) 30 4.8 3.6 5.1 19 7.3 4.4 8.0 15 7.8 7.0 9.0

Specific conductance 

(μS/cm)

30 41 29 55 13 405 140 615 15 484 366 806

Dissolved oxygen 14 0.3 0.09 1.8 -- -- -- -- -- -- -- --

Dissolved solids 11 46 30 58 6 205 130 390 7 340 250 500

Bicarbonate 9 3.0 2.4 6.1 6 183 104 256 7 232 189 366

Calcium 27 .74 <.45 2.64 13 34 4.3 82 10 28 1.1 33

Magnesium 27 1 .38 1.4 13 8.3 2.2 39 10 30 2.4 46

Sodium 27 3.2 2.7 4 13 7.0 4.1 38 10 18 8.2 190

Potassium 27 .77 <1.3 1.0 13 2.4 .66 13 10 10 3.5 26

Chloride 3 3.8 3 4 6 8.8 2.5 58 7 10 5.6 38

Sulfate 3 3 <1 6.5 6 8.1 <1 49 7 8.5 <1 76

Total organic carbon 9 13.6 8.0 26.6 12 4.7 1.5 8.3 10 4.6 3.2 20.8

Nitrate + nitrite as N 24 <.02 <.02 .01 13 <.01 <.02 .05 10 <.02 <.02 .06

Ammonia as N 2 .21 .17 .26 13 .25 .02 .37 10 .36 0.2 .64

Phosphorus as P 2 <.02 <.02 <.02 13 .02 <.02 .05 10 <.02 <.02 .02
6 Water-Quality and Discharge Data for St. Joseph Bay, Florida, 1997-98

Water Levels in Wells

Two wells had sufficient long-term data (multiple samples per year for more than 10 years) to construct graphs of water levels over time. One well is 

located in the southern edge of St. Joe Spit near Cape 

San Blas and the other well is located in the city of Port 

St. Joe (fig. 1). The well near Cape San Blas, finished 

in the Upper Floridan aquifer, is 595 feet deep. The 

well in Port St. Joe is also in the Upper Floridan aquifer 

but the well depth is unknown.

Water levels in the well located near Cape San 

Blas were available from 1974 through 1990 and 

ranged from 9.34 to 6.11 feet above sea level (fig. 2). 

The minimum water level of 6.11 feet was recorded in 

late 1976. Precipitation records at nearby Apalachicola, 

Fla. (National Oceanic Atmospheric Administration, 

1998b) indicate that precipitation in 1976 was about 

10 inches below the long-term average. 

Water levels in the well located in Port St. Joe 

were available from 1980 through 1990. They were 

usually below sea level, ranging from 0.2 feet above 

sea level in January 1982 to 9.25 feet below sea level in 

May 1981. From mid-1987 through late 1988, water 

levels remained relatively constant at 6.5 to 8.8 feet 

below sea level. Precipitation records at Apalachicola 

indicate that precipitation in 1987 was about 10 inches 

below the long-term average.

Table 2. Surface-water quality from the Chipola River distribution canal, the Gulf County Canal, and St. Joseph Bay near St. 

Joseph Spit

[Concentrations are in milligrams per liter unless otherwise noted. Only mean, minimum, and maxium values were available. °C, degrees Celsius; μS/cm, 

microsiemens per centimeter; NTU’s, nephelometric turbidity units, --, not available]

USGS station 295102085152400, 

Chipola River distribution canal near 

Port St. Joe, Florida (data from USGS 

files, 1975-80)

Gulf County Canal at Channel 

Marker 5, latitude 29°50’19", longitude 85°19’04" (data from 

USEPA STORET, 1990-96)

St. Joseph Bay near St. Joseph 

Spit, latitude 29° 49’ 30", longitude 85° 24’ 32" (data from 

USEPA STORET, 1990-96)

N Mean Minimum

Maximum N Mean Minimum

Maximum N Mean Minimum

Maximum

Temperature (°C) 2 20 9.0 31.0 218 23.4 10.0 33.3 224 22.9 2.9 33.9

pH (pH units) 2 7.0 6.8 7.2 120 8.2 7.3 8.6 125 8.3 7.7 8.6

Specific conductance 

(μS/cm)

2 81 65 97 -- -- -- -- -- -- -- --

Dissolved oxygen -- -- -- 128 7.6 2.0 10.0 132 8.3 5.3 10.0

Turbidity, NTU’s -- -- -- 125 43.4 6.4 160.0 130 10.9 3.8 80.0

Bicarbonate 2 37 31 44 -- -- -- -- -- -- -- --

Calcium 3 13 9.5 39 -- -- -- -- -- -- -- --

Magnesium 3 1.5 1.4 2.7 -- -- -- -- -- -- -- --

Sodium 3 .2 0.2 0.4 -- -- -- -- -- -- -- --

Potassium 3 .9 .7 1.1 -- -- -- -- -- -- -- --

Chloride 3 4.6 3.2 8.6 -- -- -- -- -- -- -- --

Sulfate 3 <.01 <.01 .2 -- -- -- -- -- -- -- --

Total organic carbon 1 -- 3.0 3.0 -- -- -- -- -- -- -- --

Nitrate + nitrite as N 2 .22 .12 .32 -- -- -- -- -- -- -- --

Ammonia as N 1 -- .04 .04 -- -- -- -- -- -- -- --

Phosphorus as P 1 -- .04 .04 -- -- -- -- -- -- -- --

1974 1976 1978 1980 1982 1984 1986 1988 1990

YEAR

2

-10

-8

-6

-4

-2

0

1974 1976 1978 1980 1982 1984 1986 1988 1990

YEAR

12

10

8

6

4

2

0

WATER LEVEL,

IN FEET ABOVE SEA LEVEL

WATER LEVEL,

IN FEET ABOVE SEA LEVEL

U.S. AIR FORCE WELL DF-A

293958085211801

PAPER COMPANY WELL AT PORT ST. JOE

294934085173301

Figure 2. Hydrographs for two wells near St. Joseph Bay, 

1974-90.
Discharge Data, October 1997 and March 1998 7

DISCHARGE DATA, 

OCTOBER 1997 AND MARCH 1998

The tidal range in St. Joseph Bay on October 29, 

1997 was about 1 foot (fig. 3) (measured at Panama 

City Beach) (National Oceanic Atmospheric Administration, 1998a). Estimated discharge for a 24-hour tidal 

cycle on October 29 ranged from about -116,000 ft3/s 

(into the Bay) to +110,000 ft3/s (out of the Bay).

The tidal range in St. Joseph Bay on March 3, 

1998 was about 1.3 feet (fig. 3). Estimated discharge 

for the 24-hour tidal cycle on March 3 ranged from 

about -132,000 ft3

/s (into the Bay) to about 

+121,000 ft3

/s (out of the Bay). During the incoming 

tide, flow rates in the Gulf County Canal averaged 

about -3,000 ft3

/s (away from the Bay). Discharge measurements made on the small tributaries to the Bay during the afternoon of March 2 were on an ebb tide, and 

therefore were influenced by water coming out of storage. Generally, similar conditions existed during the 

October data collection period, except that wind was not 

as significant in mixing and altering water levels. 

WATER-QUALITY DATA FOR ST. JOSEPH 

BAY, OCTOBER 1997 AND MARCH 1998

Water-quality data collected consists of temperature, pH, specific conductance, dissolved oxygen, and 

turbidity. Measurements were made at 60-65 sites 

(fig. 4) on October 29, 1997 and again on March 3-4, 

1998. Data for each constituent measured at individual 

measuring points are listed in the appendix.

2400

2400

2400

2400

1200

1200

1200

1200

2400

2400

2400

2400

1200

1200

1200

1200

2400

2400

2400

2400

1200

1200

1200

1200

2400

2400

2400

2400

28

28

2

2

29

29

3

3

30

30

4

4

October 1997

October 1997

1.0

0.5

0

-0.5

-1.0

-1.5

1.0

0.5

0

-0.5

-1.0

-1.5

March 1998

March 1998

WATER LEVEL, IN FEET

ABOVE SEA LEVEL

WATER LEVEL, IN FEET

ABOVE SEA LEVEL

ESTIMATED DISCHARGE, IN

THOUSAND CUBIC FEET PER SECOND

ESTIMATED DISCHARGE, IN

THOUSAND CUBIC FEET PER SECOND

200

100

0

-100

-200

200

100

0

-100

-200

Panama City Beach Panama City Beach

St. Joseph Bay

NOTE: Negative discharge values indicate flow into St. Joseph Bay and

positive discharge values indicate flow out of St. Joseph Bay.

Figure 3. Gage heights for St. Joseph Bay and Panama City Beach, and estimated discharge in St. Joseph Bay for 

October 29, 1997 and March 3, 1998. (Panama City Beach data from National Oceanic Atmospheric Administration, 

1998a.)
8 Water-Quality and Discharge Data for St. Joseph Bay, Florida, 1997-98

85°25′

29°50′

29°45′

29°40′

85°20′

EXPLANATION

DREDGE OR SPOIL AREA

ROADS

BATHYMETRIC CONTOUR—Interval is

2 meters with supplementary (dashed)

1 meter contours. Datum is mean lower

low water (sampling interval is 1,500

meters)

SAMPLING SITE AND NUMBER

0

0

1

1

2

2

3 MILES

3 KILOMETERS

GULF

O F

MEXICO

St Joseph

Bay

GULF OF MEXICO

16 17

26

34

43

50

58

66

74

80

87

95

103

65

73

79

174

176

104

114

124

183

182

181

179

18

27

35

44

164

45

45

53

19

28

36

184

51

59

67

75

81

88

96

105

115

125

135

163

52

60

68 69

185

186

89

97

107

117

127

137

106

116

126

136

162

6

1 2

4

6

8

8

4

2

10

10

10

10

10

10

12

12

10

10

10

10

8

8

8

8

8

8

8

8

2

8

1

6

6

6

6 4

6

4

6

2

2

4

4

2 4

6

2

1

6

2

1 1

1

2

4

Figure 4. Location of water-quality measuring points in St. Joseph Bay.

Climatic conditions were 

different for the two sampling periods. On October 29, 1997 the air 

temperature ranged from 10 to 

19 degrees Celsius and the winds 

were calm (mean wind speed less 

than 3 knots) (National Oceanic 

and Atmospheric Administration, 

1998b). Air temperatures on March 

3-4, 1998 were lower and ranged 

from 2 to 15°C on March 3 and 5 to 

16°C on March 4. The mean wind 

speed was 11 knots on March 3 and 

6 knots on March 4 (National Oceanic and Atmospheric Administration, 1998b). Rainfall was not 

recorded for either of the sampling 

dates at nearby Apalachicola, Fla., 

but 3.34 inches of rain was 

reported two days before the October sampling period, on October 

27, 1997 (National Climatic Data 

Center, 1998a). Daily rainfall 

amounts did not exceed 

0.02 inches for about 10 days (February 22 through March 3) preceding the March sampling period 

(National Climatic Data Center, 

1998b, 1998c).
Water-Quality Data for St. Joseph Bay, October 1997 and March 1998 9

Turbidity

Turbidity is a qualitative measure of the opaqueness produced in water by suspended particulate matter 

(Reid and Wood, 1976). Turbidity measurements 

ranged from 0.1 nephelometric turbidity units to 

several hundred ntu’s (fig. 5). In October, turbidity 

ranged from 0.6 to 677 ntu’s, with a median of 1.3 ntu’s 

(table 3). In March, turbidity ranged from 0.1 to 

227 ntu’s, with a median of 1.7 ntu’s (table 3). Results 

of the Wilcoxon rank-sum test indicated that the difference in turbidity values betewen the October and the 

March data was not significant at the 0.05 significance 

level (p-value = 0.35). Although the medians were similar for October and March data, the distribution of the 

turbidity values was different, with a much larger range 

in values in October. This could indicate that October 

experienced greater land-derived inputs of water, such 

as runoff produced by rainfall.

(41)

(43)

(53)

(69)

(61)

(56)

0.1

1,000

0.2

0.5

1

2

5

10

20

50

100

200

500

NEPHELOMETRIC TURBIDITY UNITS

(41) (43) (53)

(69) (61) (56)

24

12

14

16

18

20

22

TEMPERATURE, IN

DEGREES CELSIUS

(41) (43) (53)

(68)

(61)

50,000

35,000

(56)

40,000

45,000

SPECIFIC CONDUCTANCE, IN

MICROSIEMENS PER CENTIMETER

(41) (43)

(53) (68)

(61) (56)

12

0

2

4

6

8

10

DISSOLVED OXYGEN,

IN MILLIGRAMS PER LITER

(41) (43)

(53) (68) (61) (56)

7.6

7.8

8.0

8.2

8.4

pH UNITS

a

a

a

a

a

b

b

b

b

b

c

c

c

c

c

a

a

a

a

a

b

b

b

b

b

c

c

c

c

c

OCTOBER MARCH

OCTOBER MARCH

OCTOBER MARCH

OCTOBER MARCH

OCTOBER MARCH

EXPLANATION

Number of observations

90th percentile

75th percentile

Median

25th percentile

10th percentile

(53)

’a’ refers to shallow measurement,

’b’ to mid-depth measurement

and ’c’ refers to deep measurement

Figure 5. Turbidity, temperature, specific conductance, dissolved oxygen, and pH measurements in St. Joseph Bay, 

October 29, 1997 and March 3-4, 1998.
10 Water-Quality and Discharge Data for St. Joseph Bay, Florida, 1997-98

Turbidity values >100 ntu’s were all measured in 

the same general area. The shallow and mid-depth values >100 ntu’s were at the same 7 points near the outlet 

of the Gulf County Canal. Turbidity values were variable by depth but often increased then decreased.

Temperature

In October, water temperatures in St. Joseph Bay 

ranged from 16.4 to 22°C, with a median value of 

20.6°C. Higher temperatures (greater than or equal to 

20 °C) were recorded in the middle and northern parts 

of the Bay with values less than 20°C in the southern 

part. In March, temperatures ranged from 12.7 to 

16.7°C, with a median of 15.4°C. Similar to the October readings, higher temperatures (greater than 15°C) 

were measured in the northern part of the Bay, but temperatures less than 15°C were measured in central and 

northwestern parts of the Bay. Results of the Wilcoxon 

rank-sum test indicated that the difference in temperature values between the October and the March data 

was significant at the 0.05 significance level (p-value 

< 0.01). Differences by depth were not noticeable.

Specific Conductance

In October, specific conductance ranged from 

36,000 to 42,500 μS/cm, with a median of 

39,500 μS/cm. In March, specific conductance was 

higher and ranged from 23,500 to 51,600 μS/ cm; the 

median of 43,300 μS/cm was greater than the maximum from October. Results of the Wilcoxon rank-sum 

test indicated that the difference in specific conductance values between the October and the March data 

was significant at the 0.05 significance level (p-value 

<0.01). The distribution of specific conductance varied 

at the two measuring times. In October, the higher 

values of specific conductance were measured in the 

southern part of the Bay and little variation was noted 

at the three depths measured. In March, higher values 

were measured in the northern part of the Bay and more 

high values were measured at the deeper measuring 

points. Differences were noted in specific conductance 

values by depth. At the sites where measurements were 

made at more than 3 depths, specific conductance 

increased with depth.

Comparison to data collected at estuaries 

throughout Florida showed that values in St. Joseph 

Bay are higher than most other estuaries sampled. The 

median for 1,439 sites statewide was 37,125 μS/cm 

(Friedemann and Hand, 1989). 

Dissolved Oxygen

In October, dissolved oxygen concentrations 

ranged from 0.24 to 10.1 mg/L, with a median of 

7.6 mg/L (table 3). In March, dissolved oxygen 

concentrations were higher and ranged from 5.9 to 

11.4 mg/L, with a median of 8.3 mg/L. The ranges may 

appear similar, but in October, nearly 90 percent of 

dissolved oxygen concentrations were less than the 

median for the March measurements. Results of the 

Wilcoxon rank-sum test indicated that the difference in 

dissolved oxygen concentrations betewen the October 

and the March data was significant at the 0.05 significance level (p-value < 0.01). At the sites where measurements were made at several depths, dissolved 

oxygen concentrations decreased with depth.

Compared to dissolved oxygen concentrations in 

the Bay, dissolved oxygen concentrations in ground 

water from the surficial aquifer system were very low. 

The median for the surficial aquifer system was 

0.3 mg/L. According to measurements made throughout Florida and reported by Friedemann and Hand 

(1989), the median dissolved oxygen for 1,658 samples 

from estuaries throughout the State is 6.8 mg/L, 

slightly lower than the median values for the measurements made in St. Joseph Bay for this study.

Table 3. Temperature, pH, specific conductance, dissolved oxygen, and turbidity in St. Joseph Bay, October 29, 1997 and 

March 3-4, 1998

[°C, degrees Celsius; μS/cm, microsiemens per centimeter; mg/L, milligrams per liter; ntu’s, nephelometric turbidity units]

October 29, 1997 March 3-4, 1998

N Median Minimum Maximum N Median Minimum Maximum

Temperature, °C 137 20.6 16.4 22.0 255 15.4 12.7 16.7

pH, units 137 8.1 8.1 8.3 255 8.1 7.8 8.4

Specific conductance, μS/cm 137 39,500 35,900 42,600 255 43,300 23,400 51,600

Dissolved oxygen, mg/L 137 7.6 0.24 10.1 255 8.3 5.9 11.4

Turbidity, ntu’s 137 1.3 0.6 677 255 1.7 0.3 227
Summary 11

pH

The range of pH values in the Bay was less than 

1.6 pH units in measurements from both October and 

March. In October, pH values ranged from 6.7 to 8.3, 

with a median of 8.1; over 80 percent of the pH values 

throughout the Bay were greater than 8.0 and less than 

8.2. In March, the range of pH values—7.8 to 8.4—was 

slightly higher than in October, but the median, 8.1, 

was the same as October. Results of the Wilcoxon ranksum test indicated that the difference in pH values 

between the October and the March data was not significant at the 0.05 significance level (p-value = 0.07). 

At most sites, pH showed no differences with depth, 

but at several sites pH decreased slightly with depth 

(less than 0.2 pH units).

The median pH values measured in the Bay are 

slightly higher than the medians for ground water or 

surface water in this area (tables 1 and 2). According to 

measurements made throughout Florida and reported 

by Friedemann and Hand (1989), the median pH value 

for 1,552 samples from estuaries throughout the State 

is 8.0, similar to the values in St. Joseph Bay.

SUMMARY

Historical and current water-level, discharge, 

and water-quality data were collected from St. Joseph 

Bay and adjacent areas in Gulf County, Florida. Historical data were obtained from 1974 through 1997. 

Ground-water quality data for Gulf County was 

obtained from the Florida Department of Environmental Protection, Ambient Monitoring Section. Water 

from the surficial aquifer system is characterized by 

median pH of 4.8 and median specific conductance of 

41 microsiemens per centimeter. Water from the intermediate aquifer system and Upper Floridan aquifer 

were similar, with median pH values of 7.3 and 7.8, 

respectively, and median specific conductance of 405 

and 484 microsiemens per centimeter, respectively. pH 

in surface-water from the Chipola River distribution 

canal just north of the city of Port St. Joe is similar to 

that of the intermediate aquifer system and the Upper 

Floridan aquifer; but, concentrations of most constituents are higher than in the surficial aquifer system and 

lower than in the intermediate aquifer system and the 

Upper Floridan aquifer.

Water-level and water-quality data were collected in St. Joseph Bay in two sampling collection 

periods, low flow on October 29, 1997 and high flow 

on March 2-4, 1998. Water levels in St. Joseph Bay 

were monitored March 2-4, 1998, but October 28-30, 

1997 water levels were obtained from National Oceanic and Atmospheric Administration data for Panama 

City Beach. Water level changes were used to estimate 

hourly water discharge into and out of St. Joseph Bay 

on the days that water-quality measurements were 

made. On October 29, 1997, discharge estimates varied 

from about -116,000 cubic feet per second (into the 

Bay) to about +110,000 cubic feet per second (out of 

the Bay). On March 3, 1998, estimated discharge for a 

24-hour tidal cycle on March 3 varied from about -

132,000 ft3

/s (into the Bay) to about +121,000 ft3/s (out 

of the Bay).

Median turbidity and pH values were similar in 

October and March. The median temperature in March 

(15.4 degrees Celsius) was about 5 degrees cooler than 

the median temperature in October (20.6 degrees 

Celsius). But median specific conductance in March 

(43,300 microsiemens per centimeter) was greater than 

the median in October (39,500 microsiemens per centimeter). Similarly, the median dissolved oxygen concentration in March (8.3 milligrams per liter) was 

greater than the median in October (7.6 milligrams per 

liter). Differences by depth were noted for temperature, 

specific conductance, and dissolved oxygen but not for 

pH. Specific conductance increased with depth and 

temperature and dissolved oxygen decreased with 

depth. 

REFERENCES

Bush, P. W., and Johnston, R. H., 1988, Ground-water 

hydraulics, regional flow, and ground- water development of the Floridan aquifer system in Florida and in 

parts of Georgia, South Carolina, and Alabama: U.S. 

Geological Survey Professional Paper 1403-C, 80 p.

Florida Department of Environmental Protection, 1998, 

Division of Water Facilities, Ambient Monitoring 

Section downloaded on July 21, 1998 from the following URL: "http://www2.dep.state.fl.us/water/division/monitoring/download.htm"

Friedemann, M., and Hand, J., 1989, Typical water quality 

values for Florida’s lakes, streams, and estuaries, 

Florida Department of Environmental Protection, 

Standards and Monitoring Section, Bureau of Surface 

Water Management, 23 p. plus appendix.

Grubbs, J.W. and Pittman, J.R., 1997, Application of acoustical methods for estimating water flow and constituent 

loads in Perdido Bay, Florida: U. S. Geological Survey 

Water-Resources Investigations Report 97-4101, 23 p.
12 Water-Quality and Discharge Data for St. Joseph Bay, Florida, 1997-98

Hand, Joe, Col, Jana, and Lord, Linda, 1996, 1996 Water 

quality assessment for the State of Florida, Technical 

Appendix Northwest Florida: Tallahassee, Florida 

Department of Environmental Protection, Bureau of 

Surface Water Management, 128 p.

Helsel, D.R., and Hirsch, R.M., 1992, Statistical methods in 

water resources: New York, Elsevier, 522 p.

Maddox, G.L., Lloyd, J.M., Scott, T.M., Upchurch, S.B., and 

Copeland, R., eds., 1992, Florida’s Ground-Water 

Quality Monitoring Network Program: Background 

Hydrogeochemistry: Florida Geological Survey 

Special Publication no. 34, 364 p.

Marella, R.L., 1999, Water withdrawals, use, discharge, and 

trends in Florida, 1995: U. S. Geological Survey WaterResources Investigations Report 99-4002, 90 p.

National Climatic Data Center, 1998a, Climatological data, 

Florida, October, 1997, Ashville, North Carolina: 

National Climatic Data Center, vol. 101, no. 10.

National Climatic Data Center, 1998b, Climatological data, 

Florida, February, 1998: Ashville, North Carolina, 

National Climatic Data Center, vol. 101, no. 02.

National Climatic Data Center, 1998c, Climatological data, 

Florida, March, 1998: Ashville, North Carolina, 

National Climatic Data Center, vol. 101, no. 03.

National Oceanic and Atmospheric Administration, 1998a, 

Hourly water levels for Panama City Beach, Florida for 

October 1997 and March 1998 were downloaded on 

September 9, 1998 from the following URL: 

"http://www.opsd.nos.noaa.gov/data_res.html"

National Oceanic and Atmospheric Administration, 1998b, 

Daily temperature data and peak wind velocity for 

October 1997 and March 1998 downloaded on July 29, 

1998 from the following URL: 

"http://www.ncdc.noaa.gov/onlineprod/tfsod/climvis/

main.html"

RD Instruments, 1992, Technical manual for acoustic Doppler current profilers: San Diego, California, RD Instruments.

Reid, G.K., and Wood, R.D., 1976, Ecology of inland waters 

and estuaries, D. Van Nostrand Company, New York, 

485 p.

Rupert, F.R., 1991, Geology of Gulf County, Florida: Florida 

Geological Survey Bulletin 63, Tallahassee, Florida, 

51 p.

SAS Institute, Inc., 1990, SAS/STAT User’s guide version 6, 

fourth edition: Cary, North Carolina, SAS Institute, 

Inc., vol. 2, p. 1198-1210.

Simpson, M.R., and Oltman, R.N., 1992, Discharge-measurement system using an acoustic Doppler current profiler with applications to large rivers and estuaries: U. S. 

Geological Survey Open-File Report 91-487, 49 p.

U.S. Geological Survey, 1970, The national atlas of the 

United States of America: Washington, D.C. p. 80-81.

Visher, F.N., and Hughes, G.H., 1975, The difference 

between rainfall and potential evaporation in Florida 

(2nd ed.): Florida Bureau of Geology Map Series 32, 

1 sheet.
APPENDIX
14 Water-Quality and Discharge Data for St. Joseph Bay, Florida, 1997-98

Appendix

Site

numberDate Time

Temperature,

degrees

Celsius

Specific

conductance

microsiemens

per centimeter

Dissolved

oxygen,

milligrams

per liter

pH

Turbidity

nephelometric turbidity units

Depth

Category

16 10/29/97 9:30:12 21.03 40,049 6.58 8.10 21.8 a

17 10/29/97 9:40:52 20.22 39,482 7.34 8.14 21.4 a

18 10/29/97 9:50:24 21.00 39,370 6.90 8.14 18.6 a

18 10/29/97 9:48:32 21.32 39,775 6.71 8.14 18.9 b

18 10/29/97 9:47:24 21.33 39,444 6.69 8.14 320.9 c

19 10/29/97 10:00:27 21.11 39,457 6.77 8.14 57.8 a

19 10/29/97 9:58:51 21.28 39,601 6.16 8.12 63.0 b

19 10/29/97 9:57:26 21.27 37,061 4.82 8.12 0.0 c

26 10/29/97 14:31:36 20.71 39,127 7.72 8.14 1.3 a

26 10/29/97 14:30:48 21.01 39,484 7.62 8.13 1.0 b

26 10/29/97 14:29:56 21.28 39,792 7.51 8.12 1.2 c

27 10/29/97 10:14:51 21.35 39,567 6.94 8.13 57.3 a

27 10/29/97 10:12:51 21.47 39,875 6.82 8.13 57.8 b

27 10/29/97 10:11:27 21.41 38,591 6.48 8.13 0.0 c

28 10/29/97 10:25:07 21.46 39,517 6.79 8.12 57.6 a

28 10/29/97 10:23:39 21.60 39,943 6.48 8.12 57.8 b

28 10/29/97 10:22:31 21.55 40,095 6.30 8.12 0.0 c

34 10/29/97 14:00:52 20.60 38,557 7.77 8.14 1.3 a

34 10/29/97 14:00:00 20.74 39,030 7.65 8.12 1.1 b

34 10/29/97 13:59:04 21.15 39,761 7.56 8.10 1.1 c

35 10/29/97 10:36:19 21.38 39,683 7.06 8.16 57.3 a

35 10/29/97 10:33:43 21.50 40,012 6.95 8.14 57.9 b

35 10/29/97 10:31:35 21.28 38,614 0.24 8.14 66.1 c

36 10/29/97 11:03:48 21.50 39,622 6.70 8.12 57.8 a

36 10/29/97 11:02:36 21.53 39,877 6.67 8.12 57.6 b

36 10/29/97 11:01:08 21.21 38,643 0.65 8.12 24.4 c

43 10/29/97 13:48:47 20.58 38,547 7.71 8.14 1.3 a

43 10/29/97 13:47:47 20.61 39,132 7.64 8.14 0.9 b

43 10/29/97 13:46:51 21.34 39,774 7.51 8.13 0.9 c

44 10/29/97 11:15:04 20.78 36,687 7.25 8.17 58.0 a

44 10/29/97 11:13:16 21.47 40,058 7.17 8.17 57.4 b

44 10/29/97 11:11:56 21.45 40,210 6.27 8.17 0.0 c

45 10/29/97 11:47:42 21.98 39,547 6.31 8.13 69.0 a

45 10/29/97 11:46:02 21.95 39,710 5.85 8.13 67.3 b

45 10/29/97 11:43:10 21.61 35,950 1.29 8.13 374.0 c

50 10/29/97 13:05:47 20.47 39,188 7.71 8.13 1.1 a

50 10/29/97 13:04:51 20.49 39,411 7.68 8.13 0.9 b

50 10/29/97 13:03:51 20.74 39,737 7.58 8.11 0.9 c

51 10/29/97 12:01:22 20.98 36,822 7.20 8.17 57.8 a

51 10/29/97 11:59:38 21.57 40,203 6.99 8.17 57.4 b

51 10/29/97 11:57:06 21.54 39,314 5.83 8.17 431.0 c

52 10/29/97 12:11:10 21.53 37,523 7.06 8.14 115.1 a

52 10/29/97 12:09:38 21.56 39,974 6.99 8.10 114.6 b

52 10/29/97 12:08:02 21.52 39,513 6.49 8.10 0.0 c
Appendix 15

53 10/29/97 12:22:18 21.81 38,982 7.10 8.16 114.7 a

53 10/29/97 12:20:18 21.59 39,897 6.38 8.11 114.9 b

53 10/29/97 12:18:34 21.53 37,276 0.42 8.11 101.4 c

58 10/29/97 12:52:11 20.58 39,414 7.69 8.12 1.0 a

58 10/29/97 12:51:19 20.57 39,442 7.66 8.12 0.9 b

58 10/29/97 12:50:27 20.62 39,525 7.62 8.12 1.1 c

59 10/29/97 13:13:01 20.73 38,626 7.34 8.17 114.3 a

59 10/29/97 13:10:49 21.49 40,067 7.11 8.15 114.7 b

59 10/29/97 13:09:05 21.36 36,438 1.12 8.13 677.0 c

60 10/29/97 13:01:31 21.05 39,151 7.24 8.17 114.5 a

60 10/29/97 12:59:14 21.73 39,817 6.82 8.14 114.3 b

60 10/29/97 12:57:30 21.54 38,684 5.95 8.14 139.8 c

65 10/29/97 12:16:00 20.29 39,415 7.81 8.10 1.4 a

65 10/29/97 12:15:00 20.24 39,421 7.82 8.10 1.3 b

65 10/29/97 12:14:00 20.10 39,432 7.81 8.09 1.1 c

66 10/29/97 12:01:00 20.43 39,376 7.73 8.02 1.1 a

66 10/29/97 11:59:56 20.44 39,384 7.70 8.02 0.9 b

66 10/29/97 11:58:40 20.61 39,638 7.52 8.00 1.1 c

67 10/29/97 13:25:33 20.73 39,132 7.53 8.18 114.4 a

67 10/29/97 13:23:09 21.53 40,086 6.52 8.14 116.2 b

67 10/29/97 13:18:57 21.48 37,915 0.54 8.14 208.8 c

73 10/29/97 11:27:08 17.42 40,110 9.38 7.48 1.6 a

74 10/29/97 11:44:40 20.33 39,196 7.75 8.02 1.4 a

74 10/29/97 11:43:40 20.37 39,401 7.76 8.02 1.0 b

74 10/29/97 11:42:32 20.82 39,915 7.51 8.01 1.2 c

75 10/29/97 13:34:45 20.77 39,077 7.41 8.17 114.4 a

75 10/29/97 13:32:37 21.41 39,992 6.74 8.14 114.8 b

75 10/29/97 13:30:49 20.86 38,010 3.18 8.07 494.0 c

79 10/29/97 11:07:30 20.20 39,314 7.43 8.08 1.1 a

79 10/29/97 11:06:26 20.35 39,477 7.38 8.08 1.2 b

79 10/29/97 11:05:34 20.43 39,821 7.31 8.07 2.1 c

80 10/29/97 10:40:30 20.16 39,173 7.79 8.02 1.1 a

80 10/29/97 10:39:38 20.10 39,197 7.79 8.01 1.0 b

80 10/29/97 10:38:06 20.08 39,337 7.76 8.00 1.1 c

81 10/29/97 13:44:49 20.77 38,968 7.33 8.17 114.1 a

81 10/29/97 13:42:29 20.93 39,689 7.20 8.16 113.9 b

81 10/29/97 13:40:05 20.88 38,093 1.46 8.12 432.0 c

87 10/29/97 10:18:30 19.74 38,944 7.85 7.90 1.4 a

87 10/29/97 10:17:38 19.72 38,957 7.86 7.90 1.3 b

87 10/29/97 10:16:46 19.64 39,017 7.88 7.88 1.1 c

88 10/29/97 13:44:55 20.72 41,670 7.59 8.10 0.7 a

88 10/29/97 13:43:51 20.66 41,739 7.49 8.10 0.7 b

88 10/29/97 13:42:51 20.75 42,553 6.85 8.06 1.3 c

95 10/29/97 9:57:06 19.54 38,763 7.93 7.17 1.6 a

95 10/29/97 9:56:22 19.53 38,773 7.94 7.05 1.3 b

Appendix

Site

numberDate Time

Temperature,

degrees

Celsius

Specific

conductance

microsiemens

per centimeter

Dissolved

oxygen,

milligrams

per liter

pH

Turbidity

nephelometric turbidity units

Depth

Category
16 Water-Quality and Discharge Data for St. Joseph Bay, Florida, 1997-98

95 10/29/97 9:55:06 19.50 38,803 7.92 6.73 1.2 c

96 10/29/97 13:31:15 20.65 41,868 7.93 8.09 0.6 a

96 10/29/97 13:29:47 20.45 41,877 7.93 8.09 0.7 b

96 10/29/97 13:28:27 20.22 42,151 7.65 8.04 132.1 c

103 10/29/97 10:20:13 18.83 41,693 7.61 8.02 0.7 a

103 10/29/97 10:19:09 18.80 41,708 7.85 8.02 0.7 c

104 10/29/97 10:13:07 19.49 41,519 8.00 8.08 0.9 a

104 10/29/97 10:11:55 19.50 41,522 8.08 8.08 1.1 b

104 10/29/97 10:10:55 19.58 41,686 8.14 8.07 1.1 c

105 10/29/97 10:03:25 20.28 41,819 7.72 8.09 0.9 a

105 10/29/97 10:02:17 20.24 41,826 7.69 8.08 0.9 b

105 10/29/97 10:01:13 20.28 41,915 7.60 8.07 2.6 c

106 10/29/97 9:52:09 20.37 42,018 8.36 8.08 1.2 a

106 10/29/97 9:53:33 20.39 42,012 8.07 8.08 1.3 c

107 10/29/97 9:36:08 16.45 41,763 9.51 8.18 1.1 a

114 10/29/97 10:31:18 18.87 41,265 7.61 8.02 0.9 a

114 10/29/97 10:29:21 18.85 41,264 7.62 8.02 1.0 b

114 10/29/97 10:28:17 18.83 41,295 7.75 8.02 1.3 c

115 10/29/97 10:41:06 18.80 41,272 7.66 8.05 1.0 a

115 10/29/97 10:40:06 18.87 41,306 7.64 8.05 1.0 b

115 10/29/97 10:38:58 18.89 41,335 7.65 8.06 0.9 c

116 10/29/97 10:49:14 18.04 40,947 7.76 8.04 0.9 a

116 10/29/97 10:48:14 18.01 40,957 7.78 8.04 0.8 b

116 10/29/97 10:47:10 17.97 40,951 7.93 8.04 1.1 c

117 10/29/97 10:57:21 16.62 40,162 9.98 8.27 0.6 a

124 10/29/97 11:31:29 17.87 40,827 7.99 8.01 1.1 a

124 10/29/97 11:30:21 17.83 40,865 8.03 8.01 1.0 b

124 10/29/97 11:29:12 17.94 41,053 8.17 8.02 0.9 c

125 10/29/97 11:21:47 17.29 40,796 8.84 8.04 1.1 a

125 10/29/97 11:20:13 17.28 40,798 8.72 8.04 1.0 b

125 10/29/97 11:18:34 17.27 40,797 8.82 8.04 1.1 c

126 10/29/97 11:11:42 17.04 40,481 8.34 8.06 0.6 a

127 10/29/97 11:04:05 16.72 39,542 9.55 8.32 0.6 a

135 10/29/97 11:46:14 16.92 39,535 10.14 8.22 0.8 a

136 10/29/97 12:11:32 17.32 39,456 9.63 8.22 0.7 a

137 10/29/97 12:45:42 17.64 37,251 9.97 8.11 1.5 a

179 10/29/97 14:18:08 20.32 38,802 8.06 8.16 1.5 a

179 10/29/97 14:17:24 20.41 38,988 8.08 8.15 1.0 b

179 10/29/97 14:15:12 21.02 39,877 7.31 8.10 1.2 c

181 10/29/97 12:38:31 20.44 39,516 7.77 8.12 0.9 a

181 10/29/97 12:37:35 20.47 39,535 7.75 8.12 0.9 b

181 10/29/97 12:36:39 20.47 39,577 7.72 8.12 0.9 c

182 10/29/97 13:24:12 20.36 38,942 7.77 8.14 1.2 a

182 10/29/97 13:23:16 20.33 38,959 7.78 8.14 1.1 b

182 10/29/97 13:22:16 20.33 39,061 7.77 8.14 0.9 c

183 10/29/97 13:36:05 20.36 36,940 8.02 8.15 1.6 a

Appendix

Site

numberDate Time

Temperature,

degrees

Celsius

Specific

conductance

microsiemens

per centimeter

Dissolved

oxygen,

milligrams

per liter

pH

Turbidity

nephelometric turbidity units

Depth

Category
Appendix 17

183 10/29/97 13:35:13 20.22 37,809 8.41 8.17 1.3 b

183 10/29/97 13:34:21 20.14 38,217 8.64 8.18 1.0 c

162 03/04/98 9:54:00 14.99 51,630 8.42 8.18 5.3 c

162 03/04/98 9:57:00 15.04 51,220 8.19 8.2 4.9 b

162 03/04/98 10:00:00 14.95 50,800 8.19 8.2 5.0 a

16 03/04/98 10:05:00 15.22 51,570 7.84 8.18 6.0

16 03/04/98 10:07:00 15.32 51,370 7.68 8.18 10.0

16 03/04/98 10:10:00 15.35 50,800 7.70 8.18 8.0 a

16 03/04/98 11:05:00 15.47 50,820 8.07 8.17 6.8

16 03/04/98 11:06:00 15.47 50,950 7.95 8.18 8.0

16 03/04/98 11:07:00 15.38 51,250 7.91 8.18 8.5

16 03/04/98 11:08:00 15.32 51,380 7.89 8.18 7.0 b

16 03/04/98 11:09:00 15.26 51,520 7.84 8.18 6.6

16 03/04/98 11:10:00 15.26 51,530 7.84 8.18 4.5

16 03/04/98 11:11:00 15.25 51,570 7.83 8.18 6.5 c

17 03/04/98 10:18:00 14.89 46,710 8.41 8.18 3.8 c

17 03/04/98 10:20:00 14.89 44,640 8.24 8.18 2.4 b

17 03/04/98 10:23:00 14.78 38,960 8.45 8.18 2.1 a

18 03/04/98 10:28:00 15.32 51,020 8.04 8.17 9.3

18 03/04/98 10:31:00 15.46 47,180 7.95 8.16 3.9

18 03/04/98 10:33:00 15.44 43,690 8.20 8.18 1.1 a

18 03/04/98 10:54:00 14.87 37,240 8.72 8.17 2.6

18 03/04/98 10:55:00 15.10 41,060 8.45 8.18 2.1

18 03/04/98 10:56:00 15.40 43,290 8.33 8.18 1.8

18 03/04/98 10:57:00 15.39 43,730 8.37 8.18 1.1 b

18 03/04/98 10:58:00 15.30 45,480 8.38 8.18 2.1

18 03/04/98 10:59:00 15.40 46,690 8.26 8.17 3.5

18 03/04/98 11:00:00 15.49 48,300 8.08 8.15 7.0 c

19 03/04/98 10:37:00 15.53 49,960 7.45 8.1 15.6

19 03/04/98 10:39:00 15.18 45,930 7.32 8.17 2.6 b

19 03/04/98 10:41:00 15.74 43,950 8.19 8.18 1.2 a

19 03/04/98 10:43:00 15.69 43,970 8.32 8.18 1.4

19 03/04/98 10:44:00 15.18 44,690 8.38 8.17 1.4

19 03/04/98 10:45:00 15.15 46,280 8.17 8.15 3.7

19 03/04/98 10:46:00 15.60 44,020 7.58 8.18 1.3

19 03/04/98 10:47:00 15.60 49,860 7.14 8.1 15.9

19 03/04/98 10:48:00 15.62 50,550 6.98 8.1 18.9

19 03/04/98 10:49:00 15.00 50,690 6.80 8.1 20.5 c

26 03/04/98 11:17:00 15.26 51,060 7.72 8.18 8.8 c

26 03/04/98 11:19:00 14.97 45,250 8.04 8.18 1.5 b

26 03/04/98 11:21:00 15.13 38,660 8.37 8.18 2.1 a

27 03/04/98 11:26:00 15.52 48,600 8.11 8.12 8.5 c

27 03/04/98 11:28:00 15.27 44,770 8.15 8.17 1.2 b

27 03/04/98 11:30:00 15.71 38,330 8.41 8.17 2.1 a

42 03/03/98 13:39:00 16.06 45,110 8.73 8.14 1.5 c

42 03/03/98 13:41:00 16.18 44,980 8.63 8.14 1.3 b

42 03/03/98 13:43:00 16.20 44,930 8.61 8.15 2.7 a

34 03/03/98 13:08:00 15.60 48,220 8.22 8.11 1.1 c

34 03/03/98 13:10:00 15.80 46,340 8.30 8.14 1.4 b

34 03/03/98 13:12:00 15.85 45,990 8.49 8.14 1.4 a

35 03/03/98 13:17:00 15.74 47,600 8.27 8.11 1.3 c

35 03/03/98 13:19:00 15.87 44,810 8.33 8.16 1.6 b

35 03/03/98 13:22:00 15.91 44,750 8.57 8.16 1.6 a

36 03/03/98 13:28:00 15.91 44,760 8.71 8.14 1.4 c

36 03/03/98 13:31:00 16.20 44,160 8.60 8.16 1.8 b

36 03/03/98 13:33:00 16.22 44,160 8.67 8.16 2.0 a

181 03/04/98 11:47:00 15.45 49,700 8.02 8.13 8.3 c

181 03/04/98 11:49:00 15.20 47,480 7.86 8.14 1.6 b

181 03/04/98 11:51:00 14.81 38,320 8.32 8.18 2.3 a

Appendix

Site

numberDate Time

Temperature,

degrees

Celsius

Specific

conductance

microsiemens

per centimeter

Dissolved

oxygen,

milligrams

per liter

pH

Turbidity

nephelometric turbidity units

Depth

Category
18 Water-Quality and Discharge Data for St. Joseph Bay, Florida, 1997-98

43 03/04/98 11:39:00 15.51 49,850 7.51 8.14 9.1 c

43 03/04/98 11:41:00 15.26 47,830 7.70 8.15 2.3 b

43 03/04/98 11:43:00 14.99 40,830 8.40 8.2 1.3 a

44 03/03/98 12:51:00 15.66 47,540 8.00 8.09 0.8 c

44 03/03/98 12:54:00 15.60 44,560 8.35 8.16 1.2 b

44 03/03/98 12:56:00 15.88 44,060 8.62 8.16 1.9 a

184 03/03/98 12:18:00 15.85 47,100 8.25 8.11 0.9 c

184 03/03/98 12:20:00 16.04 44,300 8.23 8.15 1.5 b

184 03/03/98 12:22:00 16.20 43,930 8.55 8.15 2.6 a

45 03/03/98 11:47:00 16.47 43,800 8.42 8.15 2.6 c

45 03/03/98 11:50:00 16.60 43,500 8.32 8.15 2.5 b

45 03/03/98 11:52:00 16.66 43,570 8.29 8.14 2.6 a

182 03/04/98 12:04:00 15.45 48,720 6.90 8.06 2.3 c

182 03/04/98 12:06:00 15.37 48,400 6.72 8.09 1.8 b

182 03/04/98 12:08:00 14.84 39,460 7.92 8.18 1.5 a

50 03/04/98 12:12:00 14.89 47,060 8.47 8.15 0.7 c

50 03/04/98 12:14:00 14.85 45,260 8.33 8.18 0.9 b

50 03/04/98 12:16:00 15.33 41,380 8.58 8.18 0.8 a

51 03/03/98 11:17:00 15.65 49,230 7.45 8.02 0.9 c

51 03/03/98 11:19:00 15.75 45,680 7.57 8.12 0.8 b

51 03/03/98 11:21:00 15.80 42,900 8.26 8.14 2.0 a

52 03/03/98 11:27:00 15.85 45,120 8.20 8.1 1.1 c

52 03/03/98 11:29:00 15.92 44,630 8.29 8.14 1.1 b

52 03/03/98 11:32:00 16.16 38,730 8.50 8.13 2.4 a

53 03/03/98 10:38:00 16.22 40,960 8.30 8.12 2.1 a

53 03/03/98 10:40:00 16.12 43,170 8.30 8.12 1.4 b

53 03/03/98 10:42:00 16.01 43,310 8.30 8.12 1.4 c

183 03/04/98 12:29:00 15.25 48,280 7.60 8.11 1.1 c

183 03/04/98 12:31:00 15.06 47,310 7.65 8.14 0.7 b

183 03/04/98 12:33:00 15.34 41,350 8.52 8.2 1.3 a

58 03/04/98 12:21:00 15.31 47,900 7.00 8.09 2.1 c

58 03/04/98 12:23:00 15.08 46,970 7.57 8.15 0.7 b

58 03/04/98 12:25:00 15.39 41,020 8.15 8.2 1.1 a

60 03/03/98 10:48:00 16.37 35,040 8.43 8.08 4.2 a

60 03/03/98 10:49:00 16.10 43,240 8.18 8.12 1.5 b

60 03/03/98 10:52:00 15.95 43,400 8.32 8.12 1.4 c

65 03/04/98 12:36:00 14.26 43,700 9.82 8.27 36.9 c

65 03/04/98 12:38:00 14.48 44,200 9.75 8.27 2.4 b

65 03/04/98 12:40:00 15.22 41,410 8.81 8.21 1.4 a

68 03/03/98 10:15:00 15.80 39,290 8.58 8.1 2.4 a

68 03/03/98 10:16:00 16.11 42,100 8.30 8.1 2.1 b

68 03/03/98 10:18:00 16.14 43,180 8.19 8.1 1.9 c

69 03/03/98 10:22:00 15.87 39,400 8.56 8.11 2.1 a

69 03/03/98 10:24:00 15.95 40,400 8.43 8.11 2.4 b

69 03/03/98 10:26:00 16.14 43,260 8.18 8.1 2.3 c

87 03/03/98 11:30:00 15.29 41,460 8.40 8.06 1.3 c

87 03/03/98 11:32:00 15.33 41,460 8.40 8.06 1.5 b

87 03/03/98 11:34:00 15.33 41,460 8.30 8.06 1.4 a

88 03/03/98 12:09:00 15.44 44,910 7.69 8.01 2.0 c

88 03/03/98 12:11:00 15.49 44,300 7.97 8.02 1.0

88 03/03/98 12:14:00 15.51 41,930 8.04 8.05 1.3 b

88 03/03/98 12:16:00 15.84 40,610 8.06 8.06 1.9

88 03/03/98 12:18:00 15.92 39,830 8.13 8.06 2.0

88 03/03/98 12:20:00 15.94 39,800 8.16 8.06 2.2 a

89 03/03/98 14:10:00 15.76 33,680 9.53 8.18 15.4 a

89 03/03/98 14:13:00 15.75 33,580 9.64 8.18 14.4 b

95 03/03/98 11:10:00 15.49 40,770 8.50 8.06 1.9 c

95 03/03/98 11:12:00 15.53 40,670 8.40 8.06 1.7 b

95 03/03/98 11:14:00 15.57 40,610 8.40 8.05 1.8 a

Appendix

Site

numberDate Time

Temperature,

degrees

Celsius

Specific

conductance

microsiemens

per centimeter

Dissolved

oxygen,

milligrams

per liter

pH

Turbidity

nephelometric turbidity units

Depth

Category
Appendix 19

96 03/03/98 10:29:00 15.44 42,340 8.42 8.05 1.5 c

96 03/03/98 10:31:00 15.34 40,890 8.22 8.06 1.3 b

96 03/03/98 10:33:00 15.33 40,660 8.16 8.06 1.4 a

97 03/03/98 14:02:00 15.64 34,840 9.65 8.23 10.2 a

103 03/03/98 11:53:00 15.25 41,000 8.76 8.14 1.3 a

103 03/03/98 11:55:00 15.26 41,450 8.75 8.15 1.5 b

104 03/03/98 11:45:00 15.44 43,000 8.52 8.13 1.7 a

104 03/03/98 11:47:00 15.44 43,050 8.48 8.13 1.4 b

104 03/03/98 11:48:00 15.22 43,010 8.49 8.13 2.0 c

105 03/03/98 11:34:00 15.00 39,260 8.81 8.15 2.8 a

105 03/03/98 11:36:00 15.03 39,330 8.76 8.16 2.5 b

105 03/03/98 11:37:00 15.60 42,520 8.50 8.13 1.9 c

106 03/03/98 11:25:00 15.29 39,180 8.85 8.16 3.0 a

106 03/03/98 11:27:00 15.33 39,140 8.82 8.16 3.2 b

107 03/03/98 13:54:00 13.19 35,410 11.36 8.39 3.1 a

107 03/03/98 13:57:00 14.07 35,600 11.43 8.4 3.2 b

114 03/03/98 12:02:00 14.70 42,150 8.67 8.14 1.8 a

114 03/03/98 12:03:00 14.70 42,210 8.59 8.14 1.9

114 03/03/98 12:04:00 14.75 42,220 8.55 8.14 2.1

114 03/03/98 12:05:00 14.84 42,270 8.52 8.14 1.9 b

114 03/03/98 12:07:00 14.89 42,360 8.50 8.14 2.0

114 03/03/98 12:08:00 14.96 42,310 8.48 8.15 2.0

114 03/03/98 12:10:00 15.08 42,550 8.47 8.14 2.1

114 03/03/98 12:12:00 15.05 42,600 8.49 8.15 2.2 c

115 03/03/98 12:15:00 15.46 41,080 8.83 8.16 1.8 a

115 03/03/98 12:17:00 15.49 41,160 8.82 8.16 2.1 b

115 03/03/98 12:18:00 15.51 41,240 8.81 8.16 2.1

115 03/03/98 12:20:00 15.51 41,430 8.82 8.16 2.0 c

116 03/03/98 12:22:00 13.81 40,400 10.09 8.26 1.6 a

116 03/03/98 12:23:00 13.72 40,030 10.13 8.26 1.9

116 03/03/98 12:25:00 13.34 39,730 9.66 8.18 2.1

116 03/03/98 12:27:00 13.19 39,610 9.14 8.16 2.7 b

116 03/03/98 12:29:00 13.26 39,590 8.84 8.15 2.7

116 03/03/98 12:31:00 13.32 39,600 8.84 8.17 3.0

116 03/03/98 12:33:00 13.43 39,980 9.06 8.2 3.0 c

117 03/03/98 12:38:00 13.78 39,140 10.03 8.22 227.0 a

124 03/03/98 13:33:00 14.36 43,230 8.81 8.14 1.9 a

124 03/03/98 13:35:00 14.38 43,150 8.77 8.15 2.1 b

124 03/03/98 13:37:00 14.42 43,080 8.75 8.15 1.9 c

125 03/03/98 13:27:00 14.67 40,860 10.20 8.25 1.4 a

125 03/03/98 13:29:00 14.68 40,900 10.22 8.23 2.0 b

125 03/03/98 13:22:00 14.33 40,950 9.41 8.21 2.5 a

127 03/03/98 12:50:00 12.75 35,900 9.59 8.07 4.4 a

135 03/03/98 13:42:00 15.62 42,900 10.97 8.33 1.2 a

136 03/03/98 13:47:00 14.35 43,320 10.14 8.2 1.3 a

137 03/03/98 13:01:00 13.10 40,740 9.45 8.05 13.6 a

81 03/04/98 12:35:00 15.26 0 a

82 03/04/98 12:17:00 15.69 48,180 6.04 7.88 1.4 c

82 03/04/98 12:20:00 15.65 48,190 6.11 7.92 1.4

82 03/04/98 12:21:00 15.12 46,810 7.26 7.98 0.8

82 03/04/98 12:22:00 15.26 46,350 7.62 8 0.7 b

82 03/04/98 12:23:00 14.67 42,200 8.03 8.04 1.1

82 03/04/98 12:25:00 15.39 40,310 8.30 8.06 1.3

82 03/04/98 12:27:00 15.54 40,250 8.39 8.05 1.2 a

91 03/04/98 12:04:00 13.70 44,190 9.26 8.1 0.3 c

91 03/04/98 12:05:00 13.55 43,970 8.34 8.12 0.3

91 03/04/98 12:06:00 14.30 42,560 9.16 8.1 0.9 b

91 03/04/98 12:07:00 15.21 40,970 8.64 8.07 0.8 a

92 03/04/98 11:43:00 15.51 47,830 6.48 7.92 1.2 c

Appendix

Site

numberDate Time

Temperature,

degrees

Celsius

Specific

conductance

microsiemens

per centimeter

Dissolved

oxygen,

milligrams

per liter

pH

Turbidity

nephelometric turbidity units

Depth

Category
20 Water-Quality and Discharge Data for St. Joseph Bay, Florida, 1997-98

92 03/04/98 11:47:00 15.52 47,800 6.41 7.92 1.1

92 03/04/98 11:48:00 15.40 47,520 6.88 7.96 1.0

92 03/04/98 11:49:00 15.34 47,180 7.16 7.98 1.0

92 03/04/98 11:51:00 15.32 46,300 7.48 8 0.7 b

92 03/04/98 11:52:00 15.13 45,570 7.77 8.01 0.7

92 03/04/98 11:53:00 14.50 43,620 7.86 8.02 0.9

92 03/04/98 11:54:00 15.02 40,130 8.40 8.06 1.5

92 03/04/98 11:56:00 15.16 40,050 8.41 8.06 1.3

92 03/04/98 11:57:00 15.39 40,040 8.48 8.06 1.3 a

94 03/04/98 10:41:00 15.74 48,280 5.94 7.9 1.5 c

94 03/04/98 10:43:00 15.74 48,000 6.15 7.92 1.0

94 03/04/98 10:44:00 15.60 46,570 7.58 7.98 1.0

94 03/04/98 10:45:00 15.47 45,300 7.67 8.01 1.5

94 03/04/98 10:46:00 15.03 44,180 7.90 8.02 1.1 b

94 03/04/98 10:47:00 15.26 44,020 7.90 8.02 0.8

94 03/04/98 10:48:00 15.27 41,900 8.03 8.04 1.1

94 03/04/98 10:49:00 15.12 40,190 8.26 8.05 1.4

94 03/04/98 10:50:00 15.16 40,080 8.36 8.06 1.4

94 03/04/98 10:51:00 15.22 40,080 8.49 8.05 1.3 a

101 03/04/98 11:26:00 15.44 47,510 6.53 7.93 2.3 c

101 03/04/98 11:27:00 15.16 46,530 7.07 7.96 1.1

101 03/04/98 11:29:00 13.78 42,260 7.60 8 0.8 b

101 03/04/98 11:30:00 14.38 41,300 8.13 8.04 0.9

101 03/04/98 11:31:00 14.92 40,320 8.22 8.02 0.9 a

102 03/04/98 11:07:00 15.47 47,010 6.30 7.91 3.2 c

102 03/04/98 11:08:00 15.44 46,890 6.24 7.92 2.0

102 03/04/98 11:09:00 15.37 46,270 6.75 7.95 2.1 b

102 03/04/98 11:11:00 15.31 45,970 7.06 7.97 2.1

102 03/04/98 11:13:00 15.10 40,090 7.32 8.04 1.5

102 03/04/98 11:15:00 15.10 39,960 8.45 8.06 1.4 a

Appendix

Site

numberDate Time

Temperature,

degrees

Celsius

Specific

conductance

microsiemens

per centimeter

Dissolved

oxygen,

milligrams

per liter

pH

Turbidity

nephelometric turbidity units

Depth

Category