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Perdido Key beach nourisment project: Gulf Islands National Seashore First progress report

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Title:
Perdido Key beach nourisment project: Gulf Islands National Seashore First progress report
Series Title:
UFL/COEL (University of Florida. Coastal and Oceanographic Engineering Laboratory) ; 90/009
Creator:
Work, Paul
Publisher:
Coastal and Oceanographic Engineering Department, University of Florida
Publication Date:

Subjects

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

Notes

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

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UFL/COEL-90/009

PERDIDO KEY BEACH NOURISHMENT PROJECT: GULF ISLANDS NATIONAL SEASHORE First Progress Report
by
Paul Work Li-Hwa Lin Robert G. Dean
August 27, 1990
Submitted to:
Department of the Navy Southern Division Naval Facilities Engineering Command Charleston, SC 29411-0068




REPORT DOCUMENTATION PAGE
1. Report ft. 2. 3. Ieclpleat 'a Accession No.
4. Title aod Subtitle 5. ImpoTt Date
PERDIDO KEY BEACH NOURISHMENT PROJECT: GULF ISLANDS August 27, 1990
NATIONAL SEASHORE 6.
First Progress Report
7. Ahor() Paul Work 8. Performing ogarazatiom Report go.
Li-Hwa Lin UFL/COEL-90-009
Robert G. Dean
9. ?PerToU Organization IWOand Address 10. ?roJectlasklork Uit No.
Coastal and Oceanographic Engineering Department
University of Florida ii. contract or Grant No.
336 Weil Hall N62467-89-C-0500
Gainesville, FL 32611 13. Tp of R
12. Sponeoring OrVISmzatioM Name and Address
Department of the Navy First Progress Report
Southern Division
Naval Facilities Engineering Command
Charleston, SC 29411-0068 14.
15. Supplementary Notes
16. Abstract
This progress report encompasses the period November 15, 1989, to August 17, 1990,
documenting a beach monitoring project at Perdido Key, Florida. Dredging of Pensacola Pass, contracted by the U.S. Navy, is presently underway, with the dredge spoil serving as material for nourishment of much of the gulf-side beach lying within the Gulf Islands National Seashore on Perdido Key. The predecessor to this report (Work et al., 1990) provides greater detail regarding the scope of the nourishment project, and includes prenourishment beach profile data and sand sample analyses. This report documents work done since the pre-nourishment survey, including installation of instrumentation and collection
and analysis of wave, current, tide, and meteorological 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 Claself. of This P 21. No. of Pages J22. Price
Unclassified Unclassified 45

--A




UFL/COEL-90-009

PERDIDO KEY BEACH NOURISHMENT PROJECT:
GULF ISLANDS NATIONAL SEASHORE
First Progress Report
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

August 27, 1990

I




TABLE OF CONTENTS
1 Introduction 3
2 Wave, Current, and Tide Data Collection 3
2.1 Installation and Instrumentation Description ................. 3
2.2 Data Analysis ................................... 7
3 Additional Tide Data Collection 8
4 Meteorological Data Collection 8
5 Summary 10
6 Reference 10
APPENDIX I: Wave Data I-1
APPENDIX II: Current and Tide Data 11-1
APPENDIX I: Additional Tide Data III-1
APPENDIX IV: Meteorological Data V-1




PERDIDO KEY BEACH NOURISHAIENT PROJECT:
GULF ISLANDS NATIONAL SEASHORE First Progress Report
I Introduction
This progress report encompasses the period November 15, 1989, to August 17, 1990, documenting a beach monitoring project at Perdido Key, Florida. Dredging of Pensacola Pass, contracted by the U.S. Navy, is presently underway, with the dredge spoil serving as material for nourishment of much of the gulf-side beach lying within the Gulf Islands National Seashore on Perdido Key (Figures I and 2). The predecessor to this report (Work et al., 1990) provides greater detail regarding the scope of the nourishment project, and includes pre-nourishment beach profile data and sand sample analyses. This report documents work done since the pre-nourishment survey, including installation of instrumentation and collection and analysis of wave, current, tide, and meteorological data.
Correspondence with the Mobile District of the U.S. Army Corps of Engineers has suggested that the beach nourishment project should be completed by early September, 1990. A second beach profile survey will be conducted shortly after completion of the nourishment project. Sand samples will also be collected during the post-nourishment survey. Subsequent surveys will then be conducted once per year and, if possible, following severe erosional events.
2 Wave, Current, and Tide Data Collection Installation and Instrumentation Description
On January 18, 1990, a directional wave gage was installed directly offshore of the Gulf Islands National Seashore ranger station on Perdido Key, at a depth of approximately 7 m below mean sea level. The gage is entirely self-contained, having all circuitry, a tape drive,




6M
Figure 1. Site Location Chart.

0 5 km




/

0 1 2 3 4 5 km

Meteorological I I ,
Tide Gage
* 3 R+. R40 -4 R-50 R-55l ln-,a '
I II II II I ~ I IIg I ,-ss
ApproximateJ\DI I tl ;I'
Westerly Park Directional Wave Gage Recommended Beach
Boundary

isa Island
1o d

NOTE:
R-40 Is Florida Department of Natural Resources Monumented "Range 40"

Figure 2: Components of Beach Nourishment Monitoring Project.




Pressure Current
Sensor -\ o.--- Meter

driver,

Figure 3: Schematic of Wave Data Collection Device. digital compass, and battery power sealed within a watertight cylinder. This cylinder is bolted in a vertical position to a heavy steel tripod which is anchored to the seafloor by jetted piles (Figure 3). A pressure sensor and an electromagnetic current meter are mounted on the top end of the cylinder. Signals from the pressure sensor and current meter are recorded on a magnetic tape for subsequent analysis. The unit has sufficient data storage and battery power to be left in place for periods of up to three months without servicing, however, usually it is desirable to service the unit more frequently.
The final permit for installation of the wave gage was issued by the Department of Natural Resources, State of Florida, on December 13, 1989. The gage will later be hardwired to shore, which will allow data to be screened as it is collected and provide for early detection of instrumentation difficulties.
This report contains wave data recorded by the self-contained wave gage from the date of installation (January 18, 1990) to April 15, 1990. Available storage on the magnetic tape




on which the data are recorded was exhausted on April 15. The gage was retrieved May 2, 1990, and replaced with a fresh unit that remained in place until August 8, 1990. A gap in the data set therefore exists for the period April 15-May 2, 1990. A fresh package was installed August 8, 1990, and will remain in place through October. Data Analysis
Wave data are not collected continuously. Every six hours, a 17-minute record of the water pressure and the two horizontal components of velocity is collected, using a sampling rate of 1 Hz, resulting in a time series of 1024 data points. The pressure time series is used to determine the energy spectrum of the sea, from which the significant wave height and representative wave period are obtained.
Significant wave height is classically defined as the average of the highest one-third of the waves in the sample, but, assuming a narrow-banded energy spectrum (narrow-banded in the frequency domain), it is typically defined as follows:
where H, = significant wave height
mo= zeroth moment of the energy spectrum (i.e. area under the energy spectrum)
The representative wave period, Tm, presented in this report is defined as the period corresponding to the peak of the energy spectrum.
The two components of velocity recorded by the electromagnetic current meter are used to detect the presence of any mean currents (U,) and determine the central direction() and spreading parameters (SI, S2) of the sea. The determination of the wave direction makes use of the fact that the orbits of the water particles under a wave are aligned with the direction of travel of the wave. The central direction is the primary direction of the waves at the frequency corresponding to the peak of the energy spectrum.
The spreading parameters are governed by the directional distribution of the waves; a




unidirectional sea will have large values for the spreading parameters, while a very 'confused' sea will have low values for the spreading parameters.
Appendix I presents the representative wave period (Tm..), significant wave height (HI.), central direction in which the wave is heading (9), and the spreading parameters (SI, S2), for the time period monitored. It is seen that, over the interval of available wave data, there were six storms with significant wave heights exceeding one meter.
Appendix II contains plots showing the magnitude of any mean current (UJr), its direction (0,), and the stage of the tide. The mean current and tidal stage are computed by averaging each sample of, respectively, velocity'and pressure data, over its entire 17-minute record. Note that this method for determination of tidal stage assumes negligible variation in atmospheric barometric pressure.
3 Additional Tide Data Collection Although not included in the project contract, in response to a request by the National Park Service, a long-term tide gage was installed January 30, 1990, on a piling of the Ft. Pickens pier near the Gulf Islands National Seashore Headquarters, near the northwest tip of Santa Rosa Island (see Figure 2 for location). The tide gage consists of a surface-piercing stilling well housing a float attached to a graduated tape. The tape drives the drum of a mechanical strip chart recorder. The charts on this unit are changed weekly by National Park Service personnel. Data from this gage are presented in Appendix III. Data were available only through June 8, 1990.
4 Meteorological Data Collection
A mechanical weather station was installed and began collecting meteorological data on January 29, 1990, near the Gulf Islands National Seashore ranger station on Perdido Key (Figure 2). This unit was in place until June 24, 1990, recording wind speed, direction and air temperature data. It was replaced June 24, 1990, by a new weather station that also




Figure 4: Mechanical Weather Station.

measures and records rainfall rates and "wetness"
The first weather station installed is Model 1071, manufactured by Meteorology Research, Inc. (464 W. Woodbury Rd., Altadena, CA). It consists of a simple windvane and cup-type anemometer, mounted atop a cylinder which houses a clock and strip chart recorder (Figure 4). A continuous record of wind speed, wind direction, and air temperature is available on the resulting stripchart. Daily average wind speeds, directions, and temperatures from the mechanical weather station are presented in Appendix IV. Data for March, 1990, were not available.
The new, digital weather station records wind speed and direction, temperature, rainfall amount, and wetness once per hour. The unit stores twenty-four readings in memory, and then automatically phones a computer at the University of Georgia in Athens, Georgia, to transfer the data. The digitized data can then be easily transferred by phone line and modems, or by some other electronic medium, and data analysis initiated.




5 Summary

The project is proceeding with data collection and analysis reasonably on schedule. Postnourishment surveys will be conducted soon after completion of the dredge material placement.
6 Reference
Work, P.A., Lin, L.-H., and Dean, R.G. "Perdido Key Beach Nourishment Project: Gulf Islands National Seashore. Pre-Nourishment Survey, Conducted October 28-November 3, 1989." Coastal and Oceanographic Engineering Department, University of Florida,
Gainesville, Florida. April 30, 1990. UFL/COEL 90-006.




APPENDIX I

WAVE DATA
January 18-April 15, 1990
Notes: 1) Mean wave direction, is the direction toward which the wave is heading.
2) Horizontal axis denotes day of month.




PERDIDO KEY
20
15
Tn10 (SE C)
1 5 10 15 20 25 30
'4
3
Hs 2
(M)
1
0 I I N'~t I I,,II '
1 5 10 15 20 25 30
H
+
N -,- ,.4t + -,-++
8E
S
H I I I I I I I II I I I I I I I l I f t I I I 1 I I I t
1 5 10 15 20 25 30
120
Si:+ S2:I 90-

60

30

JRN. .1990
Figure I-1: Representative Period, Significant Wave Height, Central Direction, and Spreading Parameters, January, 1990. T

I11 1~ I11 1 I I 1 I+1 1 1 1




PERDIDO KEY

20 15 Tm 10 (SEC)
5
0
3

1 5 10 15 20 25 28

15 20

25 28

1 5 10 15 20 25 28

FEB. .1990
Figure I-2: Representative Period, Significant Wave Height, Central Direction, and Spreading Parameters, February, 1990. 1-3

1 5 10 15 20 25 28

0 H
N
E
S
H
120 90 S 60
30 0

-
+++4+
II I
- + +
l I i f fII I I IIiif l l i l l iit t i s s i l

In

I




PERDIDO KEY

20 15 Tm 10 (SEC)
5
0
3 3

1 5 10 15 20 25 30

1 5 10 15 20

MAR..1990
Figure I-3: Representative Period, Significant Wave Height, Central Direction, and Spreading Parameters, March, 1990. T A

1 5 10 15 20 25 30

1 0
H
N
E
S
H
120 so
90
S 60
30
0




PERDIDO KEY
20 15
T 10 (SEC)
0 5 III I I IIia I I I
1 5 10 15 20 25 30
4
3
Hs 2
(M)
1
0 I II I t I I I i s tt I I I
1 5 10 15 20 25 30
N
N- +
+ _+0+/ +
8 E
S
H I l I I I I l fI I I I I I I I I I I I I I I I
1 5 10 15 20 25 30
120 ,
S1:+ S2:+
90
so
S 60
0+ 30 00
00
1 5 10 15 20 25 30
APR. .1990 Figure I-4: Representative Period, Significant Wave Height, Central Direction, and Spreading Parameters, April, 1990. 1-5




APPENDIX II

CURRENT AND TIDE DATA
From Offshore Gage
January 18-April 15, 1990

Mean current direction, 0,, is the direction toward which the current is heading. Horizontal axis denotes day of month. Tidal datum is mean sea level.

Notes: 1)
2) 3)




PERDIDO KEY

0.8 -

0.2 I

n0n 0 1

1 5 10 s15 20 25 30
++ + +
+
+ + + + + +
+ +4- +
++ -# + + +
-I+ 4+
++ +
. I+I I I! II +11"11
I I t I I tItI I I t Ii t i t 1 1 I I I I + t I
I I I I I 1 I II I I I I I I III I I I I I I I

JAN..1990
Figure II-1: Magnitude of Mean Current, Direction of Mean Current, and Tidal Stage, January, 1990. TT

Uc 0.6 (M/S)
0.11

++ + +
I I o I i i i", + 1 + 1 t t "- "to-t' eT ,

C(DEG) (DEG)

WQ




PERDIDO KEY
I I Ill .I a

0.8 -

1 5 10 15 20 25 28

-4
.-

+ +-+0-+ +
+
4-+ +
+41- +

+ + +
+

+
+-- +

++ ++ -+

- +
+ 4
+
+ ++ ++
+

+ + -P + + + + +4-+
_ 4 I I I+ I I 1,ltI I1 0 i 1+
1 10 15 20 25 28

1 5 10 15 20 25 28

FEB. .1990
Figure II-2: Magnitude of Mean Current, Direction of Mean Current, and Tidal Stage, February, 1990. TT -,

Uc 0.6 (HM/S)
0.t

0.2
0.0
N

8c
(OEG)

S+ + +
.- -+ + +
+, ++'","","''.-- + -. +40 .,, +

4- +
4- +

-kL




1.0 0.8 Uc 0.6 (H/S)

0.2

PERDIDO KEY
III
+
-I
+I +- + +-L +
-+
+4 4
++ '+H- +44 + "+ +44 -+ I'++
++ + t ++1-+
+ + + ++ .+ +. + + .
1 1 l" I I I I I 4m".J "I+ ,

.......................................'' I I I I J I I I
1 5 10 15 20 25 30
0.++ + +4 ++ ~4 + +
+ .- + +. +
+ + + 4- + + + +++
+ + + + + 4.4
+ + + +++ ++ 4.4.
++ + +++ ++++++
.4-
+
4li I II 1 I L I I I I I I t I I I I 1 1 414 1 5 10 15 20 25 30

MAR. .1990
Figure II-3: Magnitude of Mean Current, Direction of Mean Current, and Tidal Stage, March, 1990. ,

Gc (DEG)

I I I II 1111 II I I I I I I III I I I I I I I I I




1.0 0.8 Uc 0.6 (M/S)
0.4 0.2 0.0
H
N

( c (DEG)

PERDIOO KEY
11 I
-
- +

+ + +**++ + + + ++*
- I- I I+ f i f.M ~ f I I I I 1 1 1 I I if
5 10 15 20 25 30
4
+- +- 4- + ++4+ + + +. ++
. . + + +# # .-+ +
+
+ + ++
+ + +
41
+
"". iit I t tI 111 11 I I I I I I1 I 111
1 5 10 15 20 25 30
f l i f fI I i l i f t J JI l I I fI I l i f f I I l l i

APR. .1990
Figure II-4: Magnitude of Mean Current, Direction of Mean Current, and Tidal Stage, April, 1990. TT




APPENDIX III

TIDE DATA
From Pier-Mounted Gage, Santa Rosa Island
February 16-June 8, 1990

Time scale is in days; i.e. Day=7 denotes the end of the 7th day of the month. Tidal stage is referenced to National Geodetic Vertical Datum (NGVD).

Notes: 1)
2)




Perdido Key

I i I I I 'I'I 'i 'I' I I I IiII

1.0 0.8 0.6
0.4 0.2 0.0
E- -0.2
-0.4
-0.6
-0.8
-1.0
1.0 0.8
0.6 0.4
0.2 "T 0.0
-0.2
-0.4
-0.6
-0.8
-1 n'

5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.
Day

15. 16. 17. 18. 19. 20. 21. 22. 23. 2q. 25. 26. 27. 28.
Day
February, 1990
Figure III-l: Tidal Curve, February, 1990.
111-2

0. I. 2. 3. q.

I I I I I II I I I I I I 'I I I I I




Perdido Key

0. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.
Day
iI jil I I 'hu h I l l l l i i t 111 li I I i
-i I i 1 1I1 1i1 I I i I i I i I 1 i I i lIi lI I I i I .5. 16. 17. 18. 19. 20. 21.22. 23. 24. 25. 26. 27. 28. 29. 30. 31.
Day
March, 1990
Figure 111-2: Tidal Curve, March, 1990.

111-3

Slit' hllIlihl IllihlIll II' I 'I
(MA/\1
gilt, hut It, I 'till,, liii I ii

1.0 0.8 0.6
0.4 0.2 0.0
-0.2
-0.4
-0.6
-0.8
-1 f'

1.0 0.8 0.6 0.4 0.2 0.0
-0.2
-0.4
-0.6
-0.8
-1.0

& il lii"




Perdido Key

1 0 I I I I S I I i
0.8 0.6
0.4
0.2
0.0
-0.2
-0.4
-0.6
-0.8
-1 .0 I i I I I I I i I I I I I I i I I I ,
0. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12.13.14.15.
Day
1 .0 I I I i i I I I | I i i i '
0.8
0.6
0.4 0.2 0.0
-0.2
-0.4
-0.6
-0.8
-1.0 I I l
15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28. 29. 30.
Day April, 1990
Figure 111-3: Tidal Curve, April, 1990.
111-4




Perdido Key

1.0 0.8 0.6
0.4 0.2
0.0
-0.2
-0.4
-0.6
-0.8
- 1.0 I II I Is i st at a l si s tI
0. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.
Day

1.0 i i i i i ,i i I '
0.8 0.6
0.4
S0.2 a; 0.0 E -0.2
-0.4
-0.6
-0.8
-1.0 l l l
15.16.17.18.19.20.21.22.23.24.25.26.27.28.29.30.31.
Day
May, 1990
Figure III-4: Tidal Curve, May, 1990.
III-5




Perdido Key

1.0
0.8 0.6 0.4 0.2 0.0
-0.2
-0.4
-0.6
-0.8
-1 _

0. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.
Day

1.0 0.8 0.6 0.4 0.2 0.0
-0.2
-0.4
-0.6

-0.8
-1.0 I llII I l I h I II I i I
15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28. 29. 30.
Day
June, 1990
Figure 111-5: Tidal Curve, June, 1990.
111-6

tI I 1i 1 1t I I I I I Ii' l I t i i i i I i
f -f i l -

J




APPENDIX IV

METEOROLOGICAL DATA January 29-August 16, 1990

Time scale is in days; i.e. Day=7 denotes the end of the 7th day of the month. Wind direction is the direction from which the wind originates, measured clockwise from magnetic north.

Notes: 1)
2)




Perdido Key

15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28. 29. 30. 31.
Day
I I I I I I I I i 'I I I I I 'I I i I I Ii I I
*1,I I ItI I1 I I ,1I 1 I 1,1

15. 16. 17. 18. 19.20. 21.22.23. 24.25. 26.27.28. 29.30. 31.
Day

15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28. 29. 30. 31.
Day
January, 1990

Figure IV-l: Wind Speed, Wind Direction, and Air Temperature, January 15-31, 1990.

IV-2

1111111111 I 1111111 11111111111 I

E10.
N9. S8. 7.
d6. S5.
~3.
S2.

360. 270. 180. 90.
n

45.
U 40. 0 35.
S30. 25.
,D 20. E-' 15. 10.
o< 5.
0.

' I I I I I I I I I Ig 'g ~ i' I I I
I I I ii I I i I i I I I I i I ii *111 I I i I

V

V.

I




Perdido Key

m10. 9.
8.
7.
36. S5.
~44.
.3.
S2.
0.
360.
270.
180.
90.

iI I I' I l I i I i I i I i I t
0. 1. 2. 3. 4. S. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.
Day

0. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.
Day
45. 40. 35.
30. 25.
20. 15. 10. 5.
0 I I I I I I I I I g I
0. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.
Day
February, 1990
Figure IV-2: Wind Speed, Wind Direction, and Air Temperature, February 1-15, 1990.

IV-3




Perdido Key

15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28.
Day
'I V I II III I I I I I I I I
15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28.
Day
S I i I I I I I I I I I I I t I

360.
270.
180.
90.
0.
45. 40. 35. 30. 25. 20. 15. 10.
5.
nS*

15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28.
Day
February, 1990 Figure IV-3: Wind Speed, Wind Direction, and Air Temperature, February 15-28, 1990.

IV-4

M, 10. N9.
7.
d6. S5. 4 4 ~3.
S2.

' ~ I I I I f ~ I I I I I I I
iii I 111,1 I, I i tilt Ii I ii

'..

0
0
4)
...)
Sj
E.-




Perdido Key

0. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.
Day

0. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.
Day

0. 1. 2. 3. '1. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.
Day
April, 1990
Figure IV-4: Wind Speed, Wind Direction, and Air Temperature, April 1-15, 1990.

IV-5

10.
S8. 7.
S6. S5.
.3.
S2.
0.

0
04
E C)
0l,
S
V

360.
270.
180.
90.
0.
45. 40. 35. 30.
25. 20. 15. 10. 5.
0.




Perdido Key

M10.
.--- 9.
S8.
-7.
S6. S5.
~44. ~3.
S2.
0.

15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28. 29. 30.
Day 360. '.
270.
180. 90. 0.
15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28. 29. 30.
Day

45. 40.
35. 30.
25. 20.
15. 10. 5.
0.

lI I I 1 I I iI I I t I I I I
15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28. 29. 30.
Day
April, 1990

Figure IV-5: Wind Speed, Wind Direction, and Air Temperature, April 15-30, 1990.

IV-6




Perdido Key

0. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.
Day

0. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.
Day

0. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.
Day
May, 1990
Figure IV-6: Wind Speed, Wind Direction, and Air Temperature, May 1-15, 1990.

IV-7

W10.
S8. 7.
d6. 5.
~44. ,3. S2. 1.
0.

C
0
E
SD wp.

360.
270.
180.
90.
0.
45. 40. 35. 30. 25. 20.
15. 10. 5.
0.




Perdido Key

15. 16. 17. 18. 19.20.21.22.23. 24. 25. 26.27.28.29.30. 31.
Day
15. 16. 17. 18. 19.20.21.22.23.24.25.26.27.28.29.30.31.
Day
ii I I I I I I i l l i I t I I I I ,

15. 16. 17. 18. 19.20.21.22.23.24.25.26.27.28.29.30.31.
Day
May, 1990

Figure IV-7: Wind Speed, Wind Direction, and Air Temperature, May 15-31, 1990.

IV-8

H I I i I i I I i I I I 1 1 1 1
--- 1I I I I i I i I I i I i I i I i I I f i I i I i I

010
7.
~6. S5.
~3.
S2. .n1

'/.

360. 270. 180. 90. 0.

45. 40. 35. 30. 25. 20. 15. 10.
5.
n




Perdido Key

10.
9.
7.
S6.
~3.
S2.
0.

360. 270.
180. 90. 0.

45.
L) 40. 0 35. 30.
25.
0 20.
.~10.
" 5.
0.

I I I I I g I 'i 'h I i I I I' i I I
I i I I ii Iii I l th I I t I I I i I i
0. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. It. 12. 13. 14. 15.
Day

I I' 1 1 1 I I I I l I I
0. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.
Day

S I I I I II I I I I I I I I I I I I I
I I t I I I I I i I I I I i I t I I t I i I t I t i
0. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.
Day

June, 1990
Figure IV-8: Wind Speed, Wind Direction, and Air Temperature, June 1-15, 1990.

IV-9




Perdido Key

15. 16. 17. 18. 19. 20. 21. 22. 23. 24-. 25. 26. 27. 28. 29. 30.
Day

I I I I I I I III I I I I I I I I I I I I I I I I I I
15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28. 29. 30.
Day
June, 1990
Figure IV-9: Wind Speed and Direction, June 15-30, 1990.

IV-10

360.

270. 180. 90.




Perdido Key

45
040. 0 35
30 25.
w20.
. 10.
0.
L10. 9.
37.
S6. 25.
~41
4 3.
2.
0.
30. 25.
20.
.15.
Q)
~10.
5.
0.

IV-ll

' I I I I I ~I I 'liii I' I I ~ I

I I I i t I I I I I I I I I I I I I t I I I I I I I 1
15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28. 29. 30.
Day
I i i i I I I I I i
15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28. 29. 30.
Day
I I I II I f I I I I I I i l I 1 t
15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28. 29. 30.
Day
June, 1990
Figure IV-10: Air Temperature, Rainfall, and Wetness, June 15-30, 1990.




Perdido Key

10. 9.
8.
-6.
S5.
3.
2.
0.
0. 1. 2. 3. q. 5. 6. 7. 8. 9. 10. 11.12. 13.14. 15.
Day 360.
270.
180.
90.
0. L I II I I II I I I I I I I I I I I I I
0. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. II. 12. 13. 14. 15.
Day July, 1990
Figure IV-11: Wind Speed and Direction, July 1-15, 1990.

IV-12




Perdido Key

0. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.
Day

0. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.
Day
0. 1. 2. 3. 5. 6. 7. B. 9. 10. 11. 12. 13. 14. 15.
Day
July, 1990
Figure IV-12: Air Temperature, Rainfall, and Wetness, July 1-15, 1990.

IV-13

45. U 40. o 35. 30.
25. w20. E- 15.
. 10.
5.
0.

-10.
,c9.
S7. S6. 5.
4.
t.3.
.52.
0.

30. 25. i 20. 15.
10.
5.
0.




Perdido Key

15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28. 29. 30. 31.
Day

15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28. 29. 30. 3 1.
Day
July, 1990
Figure IV-13: Wind Speed and Direction, July 15-31, 1990.

IV- 14

360.

270. 180. 90.




Perdido Key

45.
U 40. o 35.
30.
25. c 20. E- 15. .'10.
5.
0.
S10.*
89.
30. 5.
-4.
2.
0.
30.
25.
n 20. .15.
~10.
5.
n1

15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28. 29. 30. 31.
Day
July, 1990
Figure IV-14: Air Temperature, Rainfall, and Wetness, July 15-31, 1990.

IV-15

i I, lI i I t I II I I i tI I I I 1 ,I 1
15. 16. 17. 18. 19.20.21.22.23.24.25.26.27.28.29.30.31.
Day
15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28. 29. 30. 31.
Day
2II I 'l t I I t IIl I MI I I I I I I

'J.




Perdido Key

10.
9.
8.
7.
6.
S5.
3.
2.
1.
0.
360.

0. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.
Day
August, 1990 Figure IV-15: Wind Speed and Direction, August 1-15, 1990.

IV-16

0. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.
Day

270. 180. 90.




Perdido Key

0. 1. 2. 3. 4. 5.

0. 1. 2. 3. 4. 5. 6.

6. 7. 8. 9. 10. 11. 12. 13. 14. 15.
Day

7. 8. 9. 10. 11. 12. 13. 14. 15. Day

I I I M I I I k I I I f n I j I I I
0. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11.12. 13.14. 15.
Day
August, 1990
Figure IV-16: Air Temperature, Rainfall, and Wetness, August 1-15, 1990.

IV-17

45. C.)40. o 35.
"30. 25.
20.
10. 5I. 0.

L10.
, 9. 8.
S . 30.
5.
0.
-4 2.
15.
0.
30.
25.
20. .15.
1l0. 5.
0.

' I I I I I I I I I I I~ I I I I
I I : I ,g 1 j1 j I I I I I I I I I I




Perdido Key

15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28. 29. 30. 3 1.
Day
15. 16. 17. 18. 19. 20.21. 22. 23. 24.25. 26. 27. 28. 29. 30. 31.
Day
August, 1990
Figure IV-17: Wind Speed and Direction, August 15-31, 1990.

IV- 18

360.

270. 180. 90.




Perdido Key

S II I I I I I I I I I I I I I
15. 16. 17. 18. 19.20. 21.22. 23. 24.25. 26.27. 28. 29.30. 31.
Day

45. 0 40. o 35.
"30. S25.
w20. E 15.
.~10.
5.
0.
4 10.
' 8
90.
25. 6.
-~5.
t3.
.52.
0.
30. 25.
cn 20. ~15. S10.

15. 16. 17. 18. 19.20.21.22.23.24. 25.26.27. 28.29.30.31.
De.y
August, 1990
Figure IV-18: Air Temperature, Rainfall, and Wetness, August 15-31, 1990.

IV-19

15. 16. 1.7. 18. 19.20.21. 22.23.24.25.26.27.28.29.30.31.
Day

',,

I I I I I I I