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Perdido Key beach nourishment project: Gulf Islands National Seashore pre-nourishment survey, conducted October 28-November 3, 1989

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Title:
Perdido Key beach nourishment project: Gulf Islands National Seashore pre-nourishment survey, conducted October 28-November 3, 1989
Series Title:
UFL/COEL (University of Florida. Coastal and Oceanographic Engineering Laboratory) ; 90/006
Creator:
Work, Paul
Place of Publication:
Gainesville
Publisher:
Coastal and Oceanographic Engineering Department, University of Florida
Publication Date:

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Subjects / Keywords:
Beach nourishment -- Florida -- Perdido Key

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Funding:
This publication is being made available as part of the report series written by the faculty, staff, and students of the Coastal and Oceanographic Program of the Department of Civil and Coastal Engineering.

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University of Florida
Holding Location:
University of Florida
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All applicable rights reserved by the source institution and holding location.

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UFL/COEL-90-006

PERDIDO KEY BEACH NOURISHMENT PROJECT: GULF ISLANDS NATIONAL SEASHORE (Pre-Nourishment Survey Conducted October 28-November 3, 1989)
by
Paul Work Li-Hwa Lin Robert G. Dean
April 30, 1990
Submitted to:
Department of the Navy Southern Division Naval Facilities Engineering Command Charleston, SC 29411-0068




REPORT DOCUMENTATION PAGE
1. Reprt No.3. Recipient 'a Accession No.
1 5. Report Date
PERDIDO KEY BEACH NOURISHMENT PROJECT: GULF ISLANDS April 30, 1990
NATIONAL SEASHORE (Pre-Nourishment Survey -Conducted 6
October 28 November 3, 1989)
7. Author(@) Paul Work 8. Perforing Organization Report No.
Li-Hwa Lin UFL/COEL-90-006
Robert G. Dean
9. Performing Organization Name and Address 10. project/Task/Work Unit No.
Coastal and Oceanographic Engineering Department University of Florida 11. Contract or Grant No.
336 Weil Hall N62467-.89-C-0500
Gainesville, FL 32611 13. Typ ofRpr
12. Sponsoring Organization Me and Address
Department of the Navy Interim
Southern Division
Naval Facilities Engineering Command_______________Charleston, SC 29411-0068 .
15. Supplementary Notes
16. Abstract
This report is the first in a series documenting field programs of bathymetric surveys, sediment characteristics, and wave and meteorological data for the Perdido Key/Gulf Shores National Seashore beach nourishment project, near Pensacola, Florida. The U.S. Navy has' contracted to have Pensacola Pass dredged to a depth of 14.5 m, providing sediment for the nourishment project. The dredging work is ongoing; plans call for placement of approximately 8 million cubic meters of material on Perdido Key, on the Gulf of Mexico side.
The nourishment area begins near the eastern end of Perdido Key and extends westward for approximately 5.5 km. It is expected that the project will provide an initial increase in
beach width of approximately 120 m over this region.
The present report documents pre-nourishment conditions and includes 25 and 16 profile
lines extended into the Gulf and Bay, respectively. For those locations where Bay lines were surveyed, the profiles were established across the entire island. Sand samples were collected at various locations on the island and at 0, 1, 2, 5 m depths and end of the survey line on the Gulf profiles and at 0, 1 and 2 m depths on the Bay profiles. Additional documentation presented elsewhere includes directional wave measurements, tides and photographs from
each of the surveyed lines. The report presents all survey and sediment analysis data.
17. Originator's Key words 18. Availability Statement
Beach nourishment
Sediment transport Shoreline response
19. U. S. security Classif. of the Report 20. U. S. Security Cleassif. of This Page 2.No. of Pages 22. Price
Unclassified IUnclassified 177




UFL/ COEL-90-006

PERDIDO KEY BEACH NOURISHMENT PROJECT:
GULF ISLANDS NATIONAL SEASHORE
(Pre-Nourishment Survey Conducted October 28-November 3, 1989)
Submitted to: Department of the Navy Southern Division Naval Facilities Engineering Command
Charleston, SC 29411-0068
Prepared by: Paul Work Li-Hwa Lin Robert G. Dean Coastal and Oceanographic Engineering Department University of Florida Gainesville, FL 32611

April 30, 1990




TABLE OF CONTENTS
I INTRODUCTION 3
2 SURVEY AND REPORT SCHEDULE 3
3 SITE DESCRIPTION 6
4 DATA COLLECTION 7
4.1 Onshore and Shallow Water Portions of the Profile .............. 7
4.2 Offshore Portions of the Profile ......................... 9
4.3 Tide Data .. .. ... .. ... .. ... .. ... .. ... ... .. 10
4.4 Sand Samples ................................... 10
4.5 W ave Data .. ................... ...... ......... 11
4.6 M eteorological Data ............................... 13
4.7 Photographic Documentation .......................... 13
5 PRESENTATION OF DATA 14
5.1 Profile Data .................................... 14
5.2 Sediment Characteristics ............................. 14
APPENDIX I: BEACH AND OFFSHORE PROFILES
25 Gulf Side Profiles
16 Profiles Extended to Bay Side I-1
APPENDIX II: SEDIMENT SIZE DISTRIBUTIONS
Gulf Side: 145 Samples
Bay Side: 48 Samples II-1




PERDIDO KEY BEACH NOURISHMENT PROJECT:
GULF ISLANDS NATIONAL SEASHORE
(Pre-Nourishment Survey Conducted October 28-November 3, 1989)
1 INTRODUCTION
This report is the first in a series documenting field programs of bathymetric surveys, sediment characteristics, and wave and meteorological data for the Perdido Key/Gulf Shores National Seashore beach nourishment project, near Pensacola, Florida. The U.S. Navy has contracted to have Pensacola Pass dredged to a depth of 14.5 m, providing sediment for the nourishment project. The dredging work is ongoing; plans call for placement of approximately 8 million cubic meters of material on Perdido Key, on the Gulf of Mexico side. The nourishment area begins near the eastern end of Perdido Key and extends westward for approximately 5.5 km. It is expected that the project will provide an initial increase in beach width of 120 m over this region. Figures 1 and 2 provide site location and nourishment extent for the project.
2 SURVEY AND REPORT SCHEDULE
This report contains beach profile data for both the Gulf of Mexico side and the bay side of Perdido Key, prior to initiation of the dredging/beachfill project. Results from analyses of sand samples from each survey line are also presented. Future reports will include meteorological data collected from a land station and wave data measured by a directional wave gage installed in the Gulf of Mexico area in a water depth of approximately 7 m. near the -7 m bathymetric contour. Figure 2 shows the nourished shoreline segment, the survey lines and locations of the meteorological station and wave gage.




0 5 km
I i

Figure 1. Site Location Chart.




4'

Meteorological
Station

0 1 2 3
I 0I

*

R-30
I

R-40

R-45

R-50 I t

R-55

R-60 II

Approximate

Westerly

DirrctinalI Wavei Gage

Recommended

Park Nourishment

Beach

Boundary

NOTE:
R-40 is Florida Department

Resources

Figure

Monumented

"F

Elements of Beach Nourishment Monitoring Program.




A second survey will be conducted shortly after completion of the beachfill project, to serve as a baseline for monitoring future changes. Surveys will then be conducted on an interval of one year and, if the necessary arrangements can be made, following severe erosional events.
3 SITE DESCRIPTION
Perdido Key is a low-lying, narrow barrier island in the 'Panhandle' of Florida, near the Florida/Alabama border. Pensacola Pass and Perdido Pass define the eastern and western limits of Perdido Key, respectively, resulting in a length of approximately 25 kmn. The general orientation of the long axis of the island is east-west, so that its south shore faces the Gulf of Mexico, and its north shore abuts Big Lagoon, through which the Intercoastal Waterway passes, and Old River. The island is lightly vegetated, and is comprised primarily of clean white quartz sand, which, in many areas, forms dunes ranging in elevation up to 6 mn above sea level.
The eastern end of Perdido Key (10.5 kin) is within the Gulf Islands National Seashore, which is managed by the U.S. National Park Service. Within this section of the island, the only structures are the ranger station and associated visitor facilities near the western end of the park, and the remnants of Fort McRae at the eastern end of the island, near Pensacola Pass.
Pensacola Pass is well-defined by shoals on either side, with Caucus Shoal extending south far offshore of the eastern tip of Perdido Key. The wave climate in the area is generally mild compared to many open-ocean sites, but hurricanes can and have caused very large wave heights to occur, in conjunction with large storm surge elevations. The results of storms are clearly evident on the bay (north) side of Perdido Key, where large fans of sediment washed from the island into the bay are evident.




4 DATA COLLECTION
Twenty-five survey lines were designated, passing through benchmarks placed throughout the survey area by the Florida Department of Natural Resources (DNR). The benchmarks consist of brass disks mounted in long concrete posts, square in cross-section, sunk into the ground. They are placed along the length of Perdido Key on a nominal spacing of 300 m (1000 feet). Additionally, there axe a number of benchmarks on a spacing of 150 m (500 feet), maintained by the U.S. Army Corps of Engineers. The orientation of the survey lines is such that each runs approximately shore-normal. Table 1 presents the coordinates of the benchmarks used in this study and the azimuth of each survey line. Survey lines were placed on a 600 m (2000 ft.) spacing, with a 300 m (1000 ft.) spacing used in several areas of interest. The westernmost line is at DNR Range 30, and the easternmost at Range 67, adjacent to Pensacola Pass, providing coverage for a region approximately 11 km in length. Range 30 is roughly one-half km west of the National Seashore boundary.
Sixteen of the survey lines were extended to the bay side of Perdido Key for monitoring to the -2 m contour; surveying of the Gulf side of the island was conducted to the -8 m contour, or 800 m offshore, whichever was closer to shore.
Pre-nourishment beach profile survey data and sand samples were collected October 28-November 3, 1989. At each monument to be surveyed, the azimuth for that survey line was established by compass and marked by wooden stake. Different surveying methods were established for the onshore and offshore portions of the profile; these are described below.
4.1 Onshore and Shallow Water Portions of the Profile
For those portions of the profile above the waterline, distances were measured using a fiberglass tape, with elevations determined by a standard optical level and rod. When using such equipment, one crew member holds the graduated rod vertical at grade breaks and other points of interest, and a second crew member sights horizontally through the level.




Table 1: Coordinates, Elevations and Azimuths for Monuments Used in Survey.
Monument Nothiingi Easting Elevation Range Azimuth'
No. (ft) (ft) (in, NGVD) (Degrees)
R-30 483641.000 1076816.000 4.43 170
R-32 483966.820 1078812.720 5.86 170
R-34 484575.000 1081013.000 3.99 165
R-36 484834.280 1083221.300 2.35 165
R-38 485332.000 1085078.000 4.07 160
R-40 485924.050 10871 19.670 4.27 160
R-42 486537.500 1089122.500 2.62 160
R-43 486786.000 1090213.000 2.83 160
R-44 486922.770 1091143.410 2.87 160
R-45 487257.000 1092157.000 2.18 160
R-46 487350.000 1093014.000 4.14 165
R-48 487940.770 1095039.730 4.08 165
R-50 488315.000 1097097.000 4.02 165
R-52 489072.500 1099265.000 2.65 165
R-54 489246.500 1101191.000 3.08 165
R-56 489603.500 1103328.000 2.48 165
R-58 489940.500 1105353.000 2.18 165
R-60 490247.500 1107323.000 2.03 165
R-61 490350.500 1108298.000 2.68 165
R-62 490433.130 1109324.130 2.01 165
R-63 490528.250 1110297.350 2.45 165
R-64 490836.540 1111090.500 1.82 170
R-65 491114.930 1111728.450 2.13 105
R-66A 492016.000 1112143.000 2.68 105
R-67 492997.990 1112292.510 3.08 90
Notes: 1) Monument coordinates are in units of feet for consistency with common information sources.
2) Azimuths are measured clockwise from magnetic North and
correspond to the line-of-sight of an observer at the monument
looking offshore along the survey line.




The difference in elevation between the level and the base of the rod is determined using simple geometrical principles. All elevations were measured relative to the monument for the survey line of interest, and were recorded to the nearest centimeter. Distances were measured to the nearest decimeter.
For those portions of the profile within the surf zone (i.e. between 0 and -2 m NGVD (National Geodetic Vertical Datum of 1929)), distance data were obtained via an optical rangefinder, and elevation data by level and rod. This method has associated with it more error than the dry-land surveying, since the 'rod-man' typically must contend with both waves and currents to stay on line and keep the rod vertical. Wave conditions during the pre-nourishment survey were extremely mild; currents were strong only near the inlet.
4.2 Offshore Portions of the Profile
Deeper sections of the profile were surveyed using an 8 m survey vessel, having a draft of 1.5 m. Most of the survey lines reached the 800 m offshore limit before the -8 m contour. The boat was equipped with an acoustic fathometer (Innerspace Model 412 Auto Trlack), which computes the time required for a sound wave to travel from the boat down to the seabed and back. This time is a function of the water depth and density. In practice, the fathometer is calibrated in the area to be surveyed by placing a fiat, solid object beneath it at a known depth, and then adjusting the signal until the reported depth matches the known depth. The fathometer used has a range of 0.6 to 300 m, with an accuracy of 3 cm in the depths typically encountered during this study, assuming negligible water density gradients.
Distances from a known point on shore to the boat were measured by a Mini- Ranger Falcon 484 rangefinder. Operation requires placement of a microwave transponder on shore. An onboard 'master' unit sends a signal to this remote 'slave' unit once per second, and then measures the time required for the slave to respond. This time difference is used to compute distance between the two units. Distances measured in this manner are estimated to have an error range of 2 m The boat operator maintains horizontal alignment along




the desired survey line by viewing two large orange targets, placed so as to appear to lie above one another when viewed from a distance along the correct azimuth.
An on-board laptop computer received signals from the fathometer and the rangefinder, and recorded depth and distance once per second. This results in a horizontal distance of 2 to 3 m between each pair of data points, based on typical operating speeds of 4 to 6 knots for the boat. Each line was run three times, and an average taken.
4.3 Tide Data
The depths recorded by the onboard fathometer must be corrected to NGVD by accounting for the tidal elevation at the time of measurement. A clear stilling tube was installed near Range 45, in about 1 m of water on the Gulf side of Perdido Key. The stilling tube has affixed to it a plastic tape measure, and contains an orange float that allows observation of the water level from a distance. The stilling tube damps out short-period wave motion, and allows readings of the water level to be taken by telescope. Tidal elevations were recorded in this manner every thirty minutes during the periods of boat operation. This time interval was adequate due to the small tidal range of approximately 0.3 m, and the diurnal tide.
A long-term tide gage was installed on a piling of the fishing pier near the Gulf Islands National Seashore ranger station, near the northwest tip of Santa Rosa Island. This gage was installed January 30, 1990, and has been collecting data continuously since that time. Data from that gage will be included in a later report.
4.4 Sand Samples
Sand samples were collected at several locations of the onshore portions of each survey line. Along the Gulf side of the island, samples were taken from the dune, berm, and beachface (i.e. swash zone), and from the -1 m and -2 m contours. Samples were later collected by boat, using a heavy metal sampler, at the -5 m and -8 m contours. If the -8 mn contour was not reached by the end (800 m) of the survey line, a sample was taken from the end of the line. Along the bay (north) side of Perdido Key, samples were taken from




the beachface and the -1 mn and -2 m contours. This resulted in the collection of a total of 223 samples, each having a typical mass after drying of 200-300 grams.
Each sample was placed in a small cloth sack and labelled with the appropriate survey line and depth. The samples were then transported back to the Coastal and Oceanographic Engineering Laboratory in Gainesville for drying and sieve analysis. Overheating rendered labels unreadable on approximately 80 sample bags, requiring a return trip to collect new samples. Work on the beachfill had by this time progressed as far as Range 56, so new samples were taken only from those areas unaffected by the beachfill. Table 2 shows the resulting coverage for the sand samples; a total of 32 samples are missing from the original 223.
Subsequent to drying, each sample was removed from its sack and placed into a stack of six sieves. Table 3 indicates the size of each. A pan was placed at the bottom of the stack and the assembly placed into a mechanical shaker similar to a paint mixer. Each sieve was weighed before and after this process, providing a measure of the size distribution of each sample.
4.5 Wave Data
A directional wave gage was installed directly offshore of the ranger station on Perdido Key, near the -7 m contour. This gage is mounted on a tripod, which sits on the seafloor. It measures the time-varying pressure, which provides information from which the timedependent water surface elevation, may be obtained. Both short-term and longer-term patterns may be evaluated, providing both wave heights and tidal elevation. Horizontal velocity components are also measured. The velocity components indicate the presence of any mean currents, and also allow determination of the direction of wave propagation.
The wave gage was installed January 18, 1990. Power is provided by an internal battery, so the unit is entirely self-contained, but must be retrieved to access the data. The gage will later be hard-wired to shore, making data retrieval simpler, since it will then be accessible by phone.

L




Table 2: Locations and Depths of Sand Samples Collected
PERDIDO KEY -- PRE-BEACHFILL SAND SAMPLES
X DENOTES SAMPLES COLLECTED 10/30-11/2/89
0 DENOTES SAMPLES COLLECTED 3/7-3/9/90
NA INDICATES SAMPLES NOT REQUESTED
RANGE
Location R-30 R-32 R-34 R-36 R-38 R-40 R-42 R-43 R-44 R-45 R-46 R-48 R-50 R-52 R-54 R-56 R-58 R-60 R-61 R-62 R-63 R-64 R-65 R-66 R-67
...........-----------------------------------------------------------------------------------------------------------------------------------------------------Dune X X X X X X X X X 0 0 0 0 X 0 0 X X X X X X
Berm X X X X X X X X X X 0 0 X X 0 X X X X X
GULFBeachface 0 X X X X X X X X X X X 0 X 0 0 x X X X
SIDE 1 m X X X K X X X X X X X 0 0 X 0 0 X X X X X
2m X X X X 0 X 0 0 X 0 X 0 X X 0 X X x
5m 0 0 X X X X 0 X X 0 0 X X X 0 x x x x x
EndofLine 0 X 0 X X 0 X X 0 0 X 0 0 X X X X X X X X K

BAY Beachface NA NA NA 0 X
SIDE 1 m NA NA NA K X
2 m NA NA NA 0 0

X X 0 X 0 0 0 0 0

X X X X 0 X

K X X 0 X X 0 0 0 0 0 X

X X X 0 0 0

X NA NA NA NA NA NA
X NA NA NA NA NA NA
X NA NA NA NA NA NA




Table 3: Sieves Used for Grain Size Analysis
Sieve Number Sieve Opening
U.S. Standard mm
10 2.00
20 0.84
40 0.42
60 0.246
100 0.149
140 0.105

Data are recorded four times daily. Every six hours, data are collected for a continuous 17 minute period, using a sampling rate of 1 Hz, resulting in the collection of 1024 data points. Pressure data will also be collected every 15 minutes for evaluation of tidal elevation. The data will later be analyzed for mean water level, mean current, wave direction, significant wave height, and mean period.
4.6 Meteorological Data
Instrumentation was installed January 18, 1990, near the Gulf Islands National Seashore ranger station on Perdido Key for collection of atmospheric data. The unit records wind speed and direction and air temperature data.
4.7 Photographic Documentation
During the pre-nourishment surveys three photographs were taken at each of the 25 Gulf survey lines. These photographs were directed along the beach in each direction and perpendicular to the beach. This photography will be repeated for each survey and provide a basis for comparison and also visual documentation of vegetation recovery, dune formation, overwash build-up, etc. Because of the cost and bulkiness of the photographic documentation, only three sets have been prepared and will not be included in the present report.




5 PRESENTATION OF DATA

The profile and sediment data are discussed briefly below with all results organized as appendices.
5.1 Profile Data
Figure 3 presents an example of a profile for the Gulf and Bay side of Station 38. It is seen that for this station, which is located within the nourishment area, the Gulf profile line extended 880 m offshore reaching a depth of 6.2 m and the Bay profile line reached a distance of 320 m and a depth of 2.3 m. Note that all elevations are in meters.
Appendix I presents profile results for all 25 Gulf profiles and the 16 profiles that were extended to the Bay side of the island.
5.2 Sediment Characteristics
Figure 4 and Table 4 provide representative data regarding the distribution of sediment size on Perdido Key. Figure 4 was developed by computing the sediment size distribution curve for each sample and then averaging all curves corresponding to like depths. The values reported in Table 4 are the D50 sediment size for each curve shown in the figure. Note that D50 is the sediment size for which 50% of the sample (by weight) is finer.
In general, it was found that there was surprisingly little variability in sediment size for either side of the island, and very little depth-dependence is evident. The fact that Gulf and Bay side samples are so similar in size is most likely due to the large washover fans found along much of the Bay side of the island.
Appendix II presents the grain size distributions for each sand sample for the Gulf and Bay sides.




ELEVRTION RELRTIVE TO NGVO

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1000
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COUNTY:PERDIDO KEY
COASTAL A OCEAN ENG DEPT UNIVERSITY OF FLORIDA

RANGE:R-38 2/2
SURVEY BEAR(MAG.N):3qO BEACH SURVEY:300CT89 OFFSHORE SURVEY:31OCT89

Figure 3: Continuation of Cross-Island Profile from Preceding Page.

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COMBINED PROFILE
- MEASURED PROFILE
-- -CONSTRUCTED PROFILE




Gulf Side Average Distribution I I HIM I III I
lilll .... '"I- ITi

100.
90. 80. 70. 60.
50. 40. 30.
20. 10. 0.
10.(

0.010

S= Dune = Berm = Beachface

=ima ,= 2m '=5m S= End

Depth Depth Depth of Line

0.001

Distribution

'4 '/4.
0. 100
Grain Size, mm

0.010

(D= Beachface
1 m Depth 2 m Depth

0.001

Figure 4: Average Locations

Gulf and Bay Side Sediment Size Distributions for Various Sampling

0. 100
Grain Size, mm

000

1.000

Bay Side Average

100. 90. 80. 70. 60. 50. 40. 30. 20. 10.
0.
10.

000

1.000

IIIIII I I I 11. 1 1 11
" I I I I




Table 4: Average Size Characteristics at Various Profile Locations

Gulf Side
Location Average D50 (mm) Dune 0.37
Berm 0.38
Beachface 0.38
-1 m 0.37
-2 m 0.31
-5 m 0.33
End of Line 0.33
Bay Side
Location Average D50 (mm) Beachface 0.36
-1 m 0.36
-2 m 0.35




APPENDIX I

BEACH AND OFFSHORE PROFILES
25 Gulf Side Profiles
16 Profiles Extended to Bay Side

All elevations are in meters, relative to NGVD Reported bearings are for offshore observer, viewing along survey line toward monument.

Notes: 1)
2)




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-300

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(MONUMENT)

200

500

METER

COUNT:PERDIDO KEY
COASTAL & OCEAN ENG DEPT UNIVERSITY OF FLORIDA

RANGE:R-34 1/2
SURVEY BEAR(MAG. N):345 BEACH SURVEY:300CT89 OFFSHORE SURVEY:31OCT89

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500

.--------------.

1000

1100

1200

1300

1400

METER

COUNTY:PERDIDO KEY
COASTAL 4 OCEAN ENG DEPT UNIVERSITY OF FLORIDA

RANGE:R-34 2/2
SURVEY BEAR(MAG.N):345 BEACH SURVEY:30OCT89 OFFSHORE SURVEY:310CT89

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(MONUMENT)

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METER

COUNTY:PERDIDO KEYI
COASTAL & OCEAN ENG DEPT UNIVERSITY OF FLORIDA

RRNGE:R-38 1/2
SURVEY BEAR(MAG. N):340 BEACH SURVEY:300CT89 OFFSHORE SURVEY:31OCT89

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900

1000
METER

1100

1200

1300

1400

COUNTY:PERDIDO KEY
COASTAL & OCEAN ENG DEPT UNIVERSITY OF FLORIDA

RANGE:R-38 2/2
SURVEY BEAR(MAG. N):3qO BEACH SURVEY:300CT89 OFFSHORE SURVEY:310CT89

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ELEVATION RELATIVE TO NGVD (METER)

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ELEVATION RELATIVE TO NGVD (METER)

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COUNTYPERDIDO KEY
COASTAL & OCERN END DEPT UNIVERSITY OF FLORIDA

RRNGE:R-4L 1/2
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COUNTT:PERDIDO KEY
COASTAL & OCEAN ENG DEPT UNIVERSITY OF FLORIDA

RANGE:R-44 2/2
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-100 0
(MONUMENT)

COUNTY:PERDIDO KEY
COASTAL & OCEAN ENG DEPT UNIVERSITY OF FLORIDA

RANGE:R-U5 1/2
SURVEY BEAR(MRG.N):340 BEACH SURVEY:300CT89 OFFSHORE SURVET:31OCT89

-400

-300

-200

COMBINED PROFILE
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METER

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500




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600

900

1000
METER

1100

1200

1300

1400

COUNTY:PERDIDO KEY
COASTAL & OCEAN ENG DEPT UNIVERSITY OF FLORIDA

RANGE:R-U5 2/2
SURVEY BEAR(MRG.N):340 BEACH SURVEY:300CT89 OFFSHORE SURVEY:31OCT89

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COASTAL & OCEAN ENG DEPT UNIVERSITY OF FLORIDA

RANGE:R-48 1/2
SURVEY BEAR (MAG. N):345 BEACH SURVEY:300CT89 OFFSHORE SURVEY:31OCT89

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COASTAL & OCEAN ENG DEPT UNIVERSITY OF FLORIDA

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SURVEY BEAR(MAG. N):345 BEACH SURVEY:300CT89 OFFSHORE SURVET:31OCT89

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SURVEY BEAR(MAG. N):345 BEACH SURVEY:300CT89 OFFSHORE SURVET:310CT89

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COUNTY:PERDI DO KEY
COASTAL 6 OCEAN ENG DEPT UNIVERSITY OF FLORIDA

RANGE:R-50 2/2
SURVEY BEAR(MAG.N):345 BEACH SURVEY:30OCT89 OFFSHORE SURVEY:31OCT89

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COASTAL & OCEAN ENG DEPT UNIVERSITY OF FLORIDA

RANGE:R-54 1/2
SURVEY BEAR(MAG. N):345 BEACH SURVEY:300CT89 OFFSHORE SURVEY:31OCT89

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COASTAL & OCEAN ENG DEPT UNIVERSITY OF FLORIDA

RANGE:R-61 1/2
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COASTAL 4 OCEAN ENG DEPT UNIVERSITY OF FLORIDR

RANGE:R-61 2/2
SURVEY BERR(MRG. N):345 BEACH SURVEY:300CT89 OFFSHORE SURVEY:31OCT89

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COASTAL & OCERN ENG DEPT UNIVERSITY OF FLORIDA

RANGE:R-62 1/2
SURVEY BEAR(MAG. N):345 BEACH SURVEY:300CT89 OFFSHORE SURVEY:31OCT89

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RANGE:R-62 2/2
SURVEY BEAR(MPG.N):345 BEACH SURVEY:300CT89 OFFSHORE SURVEY:31OCT89

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400

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COUNTY:PERDIDO KEYI COASTAL 4 OCEAN ENG DEPT UNIVERSITY OF FLORIDA

RANGE:R-63R 1/2
SURVEY BEAR(MAG. N):345 BEACH SURVEY:300CT89 OFFSHORE SURVET:OINOV89

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COASTAL & OCEAN ENG DEPT UNIVERSITY OF FLORIDA

RANGE:R-63R 2/2
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RANGE:R-64 1/2
SURVEY BEAR(MAG.N):350 BEACH SURVEY:300CT89 OFFSHORE SURVEY:01NOV89

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COASTAL & OCEAN ENG DEPT UNIVERSITY OF FLORIDA

RANGE:R-64 2/2
SURVEY BEAR(MAG.N):350 BEACH SURVEY:300CT89 OFFSHORE SURVEY:01NOV89

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COUNTY:PERDIDO KEY
COASTAL 4 OCEAN ENG DEPT UNIVERSITY OF FLORIDA

RANGE:R-65 1/2
SURVEY BERR(MRG.N):285 BEACH SURVEY:300CT89 OFFSHORE SURVET:01NOV89

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800

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METER

1100

1200

1300

COUNTY:PERDIDU KEY
COASTAL & OCEAN ENG DEPT UNIVERSITY OF FLORIDA

RANGE:R-65 2/2
SURVEY BERR(MAG.N):285 BERCH SURVEY:300CT89 OFFSHORE SURVEY:01NOV89

COMBINED PROFILE
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300

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-300

COUNTYPERDIDO KEYI
COASTAL & OCEAN ENG DEPT UNIVERSITY OF FLORIDA

RANGE:R-66 1/2
SURVEY BEAR(MAG.N):285 BERCH SURVEY:30OCT89 OFFSHORE SURVEY:01NOV89

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-500

700

1000
METER

1100

1200

1300

COUNTYPERDIDO KET
COASTAL & OCEAN ENG DEPT UNIVERSITY OF FLORIDA

RANGE:R-66 2/2
SURVEY BEAR(MAG. N):285 BEACH SURVEY:30OCT89 OFFSHORE SURVEY:OINOV89

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-4100

-300

-200

-100 0
(MONUMENT)

400

500

METER

COUNTYPERDIDO KEY
COASTAL & OCEAN ENG DEPT UNIVERSITY OF FLORIDA

RANGE:R-67 1/2
SURVEY BERR(MRG.N):270 BEACH SURVEY:30OCT89 OFFSHORE SURVEY:01NOV89

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700

900

1000
METER

1100

1200

1300

1400

COUNTY:PERDIDO KEY
COASTAL & OCEAN ENG DEPT UNIVERSITY OF FLORIDA

RRNGE:R-67 2/2
SURVEY BERR(MRG. N):270 BEACH SURVEY:300CT89 OFFSHORE SURVEY:01NOV89

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APPENDIX II
SEDIMENT SIZE DISTRIBUTIONS
Gulf Side: 145 Samples Bay Size: 48 Samples




Range 30

100. 90. 80. 70. 60.
50. 40. 30. 20.
10. 0.
10.

Range 30

1.000

Gulf Side D.i0 = 0.337

Dune mm

0.100
Grain Size, mm

0.010

Gulf Side Berm = 0.323 mm

0.100
Grain Size,

0.010

mm

Figure I-1: Grain Size Distributions for Gulf Side of Range 30, Dune and Berm Positions.

1.000

000

0.001

100. 90. 80. 70. 60.
50.
40. 30. 20. 10. 0.
10.

000

0.001

I ~ IIIII




Range 30

100. 90. 80. 70. 60. 50.
40.
30. 20. 10. 0.
10.'

Range 30

1.000

Gulf Side

D 0.343 mm

0.100
Grain Size, mm

Gulf D50 =

Side 1 0.352 mm

0.100

Beachface

0.010

m Depth

0.010

Grain Size, mm
Figure H-2: Grain Size Distributions-for Gulf Side of Range 30, Beachface and 1 m Depth Positions.
H1-3

1.000

000

0.001

100. 90. 80. 70. 60. 50.
'40. 30. 20.
10. 0.
10.

000

0.001

HIM

IIIII H




Range 30

100. 90. 80.
70. 60. 50. 40.
30. 20. 10. 0.
10.

Gulf Side D,,n = 0.327

0.100
Grain Size, mm

2 m Depth mm

0.010

Range 30

1.000

Gulf D50 =

Sill

Side 5 0.348 mm

0.100
Grain Size, mm

m Depth

0.010

Figure II-3: Grain Size Distributions for Gulf Side of Range 30, 2 m Depth and 5 m Depth Positions.

1.000

000

0.001

100. 90. 80. 70. 60.
50. 40.
30. 20. 10. 0.
10.

000

0.001

U II I W
I "II L




Range 30

100. 90. 80. 70. 60. 50.
40. 30.
20. 10. 0.
10.

Gulf Side D5 s= 0.387 mn

0.100

6.6 m Depth

0.010

Grain Size, mm
Figure H-4: Grain Size Distribution for Gulf Side of Range 30, 6.6 m Depth Position.

1.000

000

0.001




Range 32

100. 90. 80. 70. 60.
.50.
40. 30.
20. 10.
0.
10.(

Range 32

1.000

Gulf Side
D ,= 0.36R

Dune mm

-un =--38M
I 1 1 1

0.100
Grain Size, mm
Gulf Side t Dfio = 0.404 mm

0.100

0.010

3erm

0.010

Grain Size, mm
Figure II-5: Grain Size Distributions for Gulf Side of Range 32, Dune and Berm Positions.

1.000

000

0.001

100. 90. 80. 70. 60. 50. 40. 30.
20. 10.
0.
10.

000

0.001

I II I I II
II \
"" Et




Range 32

100. 90.
80. 70. 60. so.
40. 30. 20. 10. 0.
10.

Gulf Side

Beachface

D50 = 0.362 mm
I N

0.100
Grain Size, mm

Range 32

1.000

Gulf D rm =

Side 1 0.500 mm

0.100

m Depth

0.010

Grain Size, mm Figure II-6: Grain Size Distributions for Gulf Side of Range 32, Beachface and 1 m Depth Positions.

1.000

000

0.010

0.001

100. 90. 80. 70. 60. 50. 40.
30.
20. 10. 0.
10.

000

0.001




Range 32

100. 90. 80. 70. 60. 50.
'10. 30.
20. 10. 0.
10.

Range 32

1.000

Gulf Side D50 = 0.233 mr

0. 100
Grain Size, mm

Gulf Side D50 = 0.350 mn

0.100

2 m Depth

0.010

5 m Depth

0.010

Grain Size, mm Figure II-7: Grain Size Distributions for Gulf Side of Range 32, 2 m Depth and 5 m Depth Positions.

1.000

000

0.001

100. 90. 80.
70. 60.
50.
40.
30.
20. 10. 0.
10.

000

0.001

il ~ ~III NIIII
I TIIII I I I I IIIII I




Range 32

100. 90. 80. 70. 60. s0. 40. 30.
20. 10. 0.
10.

Gulf

Side 5.9 m Depth
0.370 mm

0.100
Grain Size, mm

0.010

Figure H-8: Grain Size Distribution for Gulf Side of Range 32, 5.9 m Depth Position.

1.000

000

0.00 1

I N I 117




Range 34

100. 90. 80. 70. 60. 50. 40. 30. 20. 10. 0.
10.

Range 34

Gulf Side
D = 0.383

Dune mm

0.100
Grain Size, mm

Gulf
D0 -=

1.000

Side 0.343

0.100

0.010

Berm mm

0.010

Grain Size, mm
Figure H-9: Grain Size Distributions for Gulf Side of Range 34, Dune and Berm Positions.

II-10

1.000

000

0.001

100. 90. 80. 70. 60.
50. 40. 30. 20. 10. 0.
10.(

000

0.001

- ,nv = ... . ....




Range 34

100. 90.
80. 70. 60.
50. 40. 30.
20. 10. 0.
10.(

Gulf
D m =

Side 0.343

0. 100
Grain Size, mm

Beachface mm

0.010

Range 34

1.000

Gulf Drm =

Side 0.394

0.100

1
mm

m Depth

0.010

0.001

Grain Size, mm
Figure II-10: Grain Size Distributions for Gulf Side of Range 34, Beachface and 1 m Depth Positions.
I-11

1.000

000

0.001

100. 90. 80. 70. 60. 50.
40. 30.
20. 10. 0.

10.000

0.33m

I N I 11 atI




Range 34

100. 90. 80. 70. 60.
50. 40. 30. 20. 10. 0.
10.

000

1.000

Range 34

100. 90.
80. 70. 60.
50. 40. 30.
20. 10. 0.
10.000

1.000

Gulf Side 2 D50 = 0.258 mm

0.100
Grain Size, mm

Gulf D50 =

Side 0.311

5
mm

0.100
Grain Size, mm

m Depth

0.010

m Depth

0.010

Figure II-11: Grain Size Distributions for Gulf Side of Range 34, 2 m Depth and 5 m Depth Positions.
11-12

0.00t

0.001




Range 34

100. 90. 80. 70. 60.
50. 40. 30. 20. 10. 0.
10.

Gulf Side 5.8 m Depth D=n = 0.333 mm

xi
11 R" ,I III I
II IIIIIT T -

0.100

0.010

0.001

Grain Size, mm
Figure 11-12: Grain Size Distribution for Gulf Side of Range 34, 5.8 m Depth Position.

11-13

1.000

000




Range 36

100.
90. 80. 70. 60.
50. 40. 30. 20. 10. 0.
10.

Range 36

1.000

Gulf Side I Dr --= 0.430 mm

Dune

--v

0.100
Grain Size, mm

Gulf Side Berm D50 = 0.508 mm

0.100

Grain Size, mm
Figure 11-13: Grain Size Distributions for Gulf Side of Range 36, Dune and Berm Positions.

11-14

1.000

000

0.010

0.001

100. 90. 80. 70. 60. 50.
40.
30. 20. 10. 0.
10.

000

0.010

0.001

IMIIIII




Range 36

100. 90. 80. 70. 60.
50. 40. 30. 20. 10. 0.
10.

Range 36

1.000

Gulf Side D50 = 0.370 mn

0.100
Grain Size, mm

Gulf Side

D 0 = 0.316 mm

0.100

Beachface

0.010

1 m Depth

0.010

Grain Size, mm
Figure 11-14: Grain Size Distributions for Gulf Side of Range 36, Beachface and 1 m Depth Positions.
11-15

FFF

1.000

000

0.001

100. 90. 80. 70. 60.
50. 40. 30.
20.
10. 0.
10,(

000

0.001

IIII I ..III




Range 36

100. 90. 80. 70. 60. 50.
40.
30. 20. 10. 0.
10.

Gulf Side 2 m Depth D50 = 0.344 mm

0. 100
Grain Size, mm

Range 36

1.000

Gulf
D5o =

Side 5 0.312 mm

0.100

m Depth

0.010

Grain Size, mm
Figure 11-15: Grain Size Distributions for Gulf Side of Range 36, 2 m Depth and 5 m Depth Positions.
11-16

1.000

000

0.010

0.001

100. 90. 80. 70. 60.
50. 40.
30. 20. 10. 0.
10.'

000

0.001

III T

I




Range 36

100.
90. 80.
70. 60.
50. 40.
30. 20. 10.
0.
10.

Gulf Side D = 0.364

D ,n 3
III IIk

0. 100
Grain Size, mm

6.0 m Depth

mm

0.010

Figure 11-16: Grain Size Distribution for Gulf Side of Range 36, 6.0 m Depth Position.

11-17

1.000

000

0.001




Range 38

100.
90. 80. 70. 60. 50. 40.
30. 20.
10. 0.
10.(

Range 38

Gulf Side I
D = 0.371 mm

0. 100
Grain Size, mm

Gulf
D =l

1.000

Side Berm
0.472 mm

0.100

Grain Size, mm
Figure 11-17: Grain Size Distributions for Gulf Side of Range 38, Dune and Berm Positions.

11-18

)une

1.000

000

0.010

0.001

100. 90.
80. 70. 60. 50.
40. 30. 20. 10.
0.
10.

000

0.010

0.001

HIMINI II III11 11 1
NnI = 0.31I m
H III 11I II II

D5 ::::




Range 38

Gulf
D o =

-D5 =i l l I- i- 1- - -
- -i-i - , -
-:-:- --
i i i- - - -

100. 90. 80.
70. 60.
50. 40. 30.
20. 10.
0.
10.

0. 100
Grain Size, mm

Range 38

1.000

Gulf Side Ds0 = 0.342

0. 100

1 m Depth mm

0.010

Grain Size, mm
Figure II-18: Grain Size Distributions for Gulf Side of Range 38, Beachface and 1 m Depth Positions.
II-19

Side Beachface
0.365 mm

1.000

000

0.010

0.001

100. 90.
80. 70. 60. 50. 40. 30. 20.
10. 0.
10.

000

0.001

H ill
I- Hi--
I I l I l iI
- I




Range 38

100. 90. 80. 70. 60. 50. 40. 30.
20.
10.
0.
10.'

Gulf Side D50 = 0.318 mr

0. 100
Grain Size, mm

2 m Depth

0.010

Gulf Side

5 m Depth

1.000

D50= 0.323 mm
ll Kl '
HII tlE

0.100

0.010

0.001

Grain Size, mm
Figure 11-19: Grain Size Distributions for Gulf Side of Range 38, 2 m Depth and 5 m Depth Positions.
11-20

1.000

000

Range

38

0.001

100. 90. 80.
70. 60. 50. 40. 30.
20. 10. 0.

10. 000

II




Range 38

100. 90. 80. 70. 60. 50. 40. 30.
20.
10. 0.
10. 000

1.000

Gulf Side 6.2 m Depth
D0= 0.355 mm

0. 100
Grain Size, mm

0.010

0.001

Figure 11-20: Grain Size Distribution for Gulf Side of Range 38, 6.2 m Depth Position.

11-21




D50 = 0.358 mm

E JI i i, flI I -ii i- W IEL I i .

100.
90. 80. 70.
60. 50. 40. 30. 20.
10. 0.
10.

0. 100

0.010

0.001

3erm

0.010

0.001

Grain Size, mm
Figure 11-21: Grain Size Distributions for Gulf Side of Range 40, Dune and Berm Positions.

11-22

Gulf Side

wI

000

0. 100
Grain Size, mm
Gulf Side t
Drn = 0.344 mm

1.000

Range 40

100.
90.
80. 70.
60. 50.
40. 30.
20.
10. 0.
10.

000

1.000

Dune

Range 40




D50 = 0.383 mm

100. 90.
80. 70. 60. 50. 40. 30.
20.
10. 0.
10.

Range 40

Gulf
D50 =

Side 1 0.355 mm

m Depth

E1I ... .

1.000

0.100

0.010

Grain Size, mm
Figure 11-22: Grain Size Distributions for Gulf Side of Range 40, Beachface and 1 m Depth Positions.
11-23

0. 100
Grain Size, mm

000

1.000

0.010

0.001

wI

100. 90. 80. 70. 60. 50. 40.
30. 20. 10. 0.
10.

000

0.001

Range 40

Gulf Side

Beachface




Range 40

100. 90.
80. 70. 60. 50.
10. 30.
20.
10. 0.
10.'

Range 40

1.000

Gulf Side D50 = 0.246

0. 100
Grain Size, mm

Gulf Side

D5 0.313 mm

0. 100
Grain Size, mm

2 m Depth mm

0.010

5.4 m Depth

0.010

Figure 11-23: Grain Size Distributions for Gulf Side of Range 40, Depth Positions.
11-24

2 m Depth and 5.4 m

1.000

000

0.001

100. 90. 80. 70. 60. 50. 10. 30.
20.
10. 0.

10. 000

0.001




Range 40

100. 90. 80. 70. 60. 50. 40. 30.
20.
10. 0.
10. 000

1 .000

Gulf Side

D50 =0.336 mm

0. 100
Grain Size, mm

5.9 m Depth

0.010

Figure 11-24: Grain Size Distribution for Gulf Side of Range 40, 5.9 m Depth Position.

11-25

0.001




Range 42

1.000

Range 42

1.000

Gulf Side

D50 = 0.376 mm

0. 100
Grain Size, mm
Gulf Side I
Dr n = 0.352 mm

0. 100

Grain Size, mm
Figure 11-25: Grain Size Distributions for Gulf Side of Range 42, Dune and Berm Positions.

11-26

Dune

100. 90. 80.
70. 60.
50. 40.
30. 20. 10.
0.

10.000

0.010

0.001

3erm

100.
90. 80. 70. 60. 50. 40.
30. 20.
10. 0.
10.

000

0.010

0.001

IN I I II
I I II I




Range 42 Gulf Side

Do = 0.447 mm

100.
90. 80. 70. 60.
50. 40. 30.
20. 10.
0.
10.

Beachface

0.010

Range 42

1.000

Gulf Side Dso = 0.333

0. 100

1 m Depth mm

0.010

Grain Size, mm
Figure II-26: Grain Size Distributions for Gulf Side of Range 42, Beachface and 1 m Depth Positions.
II-27

0. 100
Grain Size, mm

000

1. 000

0.001

100. 90. 80.
70.
60. 50. 40. 30.
20.
10. 0.
10.(

000

0.001

HIM
n 0
- I I I
- - - - -- - -- - --I
- -. - - - ,
I- - - -- -
- --- - - -, ,

I J
- - - - - -
--- -: --b "- -- -
- - -,---, - -




Range 42

100.
90.
80. 70.
60. 50.
40. 30.
20. 10.
0.
10.000

1.000

Range 42

100. 90. 80. 70. 60. 50.
40. 30.
20.
10.
0.
10.000

1.000

Gulf Side 2
D = 0.295 mm

0. 100
Grain Size, mm

Gulf Side
D = 0.332 mn

0. 100
Grain Size, mm

m Depth

0.010

4.6 m Depth

0.010

Figure 11-27: Grain Size Distributions for Gulf Side Depth Positions.
11-28

of Range 42, 2 m Depth and 4.6 m

0.001

0.001

H I NIllIl

IM
I h i 1 1




Range 42

100. 90. 80. 70. 60. 50.
40. 30.
20.
10. 0.
10.

Gulf Side

= 0.237 mm

0. 100

5.3 m Depth

0.010

Grain Size, mm
Figure 11-28: Grain Size Distribution for Gulf Side of Range 42, 5.3 m Depth Position.

11-29

1.000

000

0.001

rn 0.237 mm