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 List of Figures






Group Title: UFL/COEL (University of Florida. Coastal and Oceanographic Engineering Laboratory) ; 77/001
Title: Determination of direction of littoral transport along the north shore of Santa Rosa Island, Florida
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Permanent Link: http://ufdc.ufl.edu/UF00076158/00001
 Material Information
Title: Determination of direction of littoral transport along the north shore of Santa Rosa Island, Florida
Series Title: UFLCOEL
Physical Description: 65 leaves : ill. ; 28 cm.
Language: English
Creator: Wang, Yu-hwa
Chang, T. H
Harrell, Sidney L
University of Florida -- Coastal and Oceanographic Engineering Laboratory
United States -- Army. -- Corps of Engineers. -- Mobile District
Publisher: Coastal and Oceanographic Engineering Laboratory, University of Florida
Place of Publication: Gainesville
Publication Date: 1977?
 Subjects
Subject: Littoral drift -- Florida -- Santa Rosa Island   ( lcsh )
Littoral drift -- Measurement   ( lcsh )
Santa Rosa Island (Fla.)   ( lcsh )
Coastal and Oceanographic Engineering thesis M.S
Coastal and Oceanographic Engineering -- Dissertations, Academic -- UF
Genre: government publication (state, provincial, terriorial, dependent)   ( marcgt )
non-fiction   ( marcgt )
 Notes
Statement of Responsibility: Yu-hwa Wang, T.H. Chang, Sidney L. Harrell.
General Note: "March, 1977."
General Note: Sponsor: Department of the Army, Mobile District, Corps of Engineers.
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.
 Record Information
Bibliographic ID: UF00076158
Volume ID: VID00001
Source Institution: University of Florida
Holding Location: University of Florida
Rights Management: All rights reserved, Board of Trustees of the University of Florida
Resource Identifier: oclc - 08302221

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    Title Page
        Title Page
    Table of Contents
        Table of Contents
    Introduction and General Description
        Page 1
        Page 2
    Field measurements and procedures
        Page 2
        Page 3
    Results, discussion and conclusions
        Page 4
        Page 5
        Page 6
    Recommendations
        Page 6
    List of Figures
        Unnumbered ( 9 )
        Page 7
        Page 8
        Page 9
        Page 10
        Page 11
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Full Text











UFL/COEL-77/001


DETERMINATION OF DIRECTION OF LITTORAL TRANSPORT

ALONG THE NORTH SHORE OF SANTA ROSA ISLAND,

FLORIDA



Yu-Hwa Wang
T.H. Chang
Sidney L. Harrell






March, 1977







Sponsor:
Department of the Army
Mobile District, Corps of Engineers
Mobile, Alabama









TABLE OF CONTENTS
age
I. Introduction 1

II. General Description of the Project Area 1

III. Field Measurements and Procedures 1

1. Test site and operating period 1

2. Sampling grid and tracer sand preparation 2

3. Injection of tracer and recovery of samples 2

4. Measurements of environmental factors 3

A. Visual observations 3

B. Recording instruments 3

IV. Results, Discussion and Conclusions 4

V. Recommendations 6

Appendix: List of Figures 7









I. INTRODUCTION

The study described in this report was authorized by a contract dated

October 19, 1976 between Department of the Army, Mobile District, Corps of

Engineers, Mobile, Alabama and the Engineering and Industrial Experiment

Station, University of Florida. The purpose of this study was to determine

the actual direction of littoral transport along the north shore of Santa

Rosa Island in the vicinity of Pensacola Beach, Florida. To accomplish this

objective the sand tracer method was used for the study. Visual observations

and instrument recordings of the environment factors were also made during

the tracing operations. The investigation covered a time span from September

14, 1976 to March 12, 1977.


II. GENERAL DESCRIPTION OF THE PROJECT AREA

Santa Rosa Island is a barrier island facing the Gulf of Mexico that

lies between Pensacola Beach and Fort Walton Beach, Santa Rosa Sound, sit-

uated on the north of the island, is an integral part of the intracoastal

waterway between Panama City and Mobile Bay. Frequent barge traffic as

well as recreational boating was observed during the sand tracing operations,

The area of immediate interest to this investigation was the north shore of

Santa Rosa Island near Pensacola Beach. It stretches from Avenida 10 to

Santa Rosa Villa, a highly developed recreational community.

III. FIELD MEASUREMENTS AND PROCEDURES

1. Test site and operation period:

The sand tracing operation and environmental factor observations were

carried out in November 1976 and again in February 1977, The location of

the test sites are shown in figure 1. The categories and operating duration

are shown in the following table.









environmental factor observations


Site A 13-14 Nov. 1976 13-14 Nov. 1976
15-20 Feb. 1977 15-20 Feb. 1977

Site B 13-14 Nov. 1976 13-14 Nov. 1976
19-20 Feb. 1977

Site C ------------- 19-20 Feb. 1977


2. Sampling grid and tracer sands preparation:

A. The November 1976 operation: The grid system established at site A

is shown in figure 2. The initial spacing was 25 feet apart, but was expanded

to 50 feet and finally 100 feet between sampling stations, A similar grid

was established at site B as shown in figure 3.

B. The February 1977 operation: The initial spacing of 25 feet was

too close. Therefore, 50 feet spacing between the sampling stations are adopted

for site A. The grid system is shown in figure 4.

C. Tracer sands: Sands were collected from site A and B shortly before

the tracing operation. These sands were coated with fluorescent dye in the

Coastal and Oceanographic Engineering Laboratory (COEL), University of Florida.

These colored sands were then injected in the predetermined coordinate system

as shown in figures 2 to 4.

3. Injection of tracer and recovery of samples

A. November 1976 operation: Approximately 100 pounds of tracer sand

was dumped instantaneously into the water at site A and B. The location of

the injections are shown in figures 2 and 3. A dredge-type sand sampler was

used for collecting the samples and the sampling stations were according to

the predetermined coordinate system. The sampling frequency was based on the

tidal cycles (approximately 24 hours). In this way, the field crew could

work alternatively between sites A and B. Each sample was put into a sampling


sand tracing









environmental factor observations


Site A 13-14 Nov. 1976 13-14 Nov. 1976
15-20 Feb. 1977 15-20 Feb. 1977

Site B 13-14 Nov. 1976 13-14 Nov. 1976
19-20 Feb. 1977

Site C ------------- 19-20 Feb. 1977


2. Sampling grid and tracer sands preparation:

A. The November 1976 operation: The grid system established at site A

is shown in figure 2. The initial spacing was 25 feet apart, but was expanded

to 50 feet and finally 100 feet between sampling stations, A similar grid

was established at site B as shown in figure 3.

B. The February 1977 operation: The initial spacing of 25 feet was

too close. Therefore, 50 feet spacing between the sampling stations are adopted

for site A. The grid system is shown in figure 4.

C. Tracer sands: Sands were collected from site A and B shortly before

the tracing operation. These sands were coated with fluorescent dye in the

Coastal and Oceanographic Engineering Laboratory (COEL), University of Florida.

These colored sands were then injected in the predetermined coordinate system

as shown in figures 2 to 4.

3. Injection of tracer and recovery of samples

A. November 1976 operation: Approximately 100 pounds of tracer sand

was dumped instantaneously into the water at site A and B. The location of

the injections are shown in figures 2 and 3. A dredge-type sand sampler was

used for collecting the samples and the sampling stations were according to

the predetermined coordinate system. The sampling frequency was based on the

tidal cycles (approximately 24 hours). In this way, the field crew could

work alternatively between sites A and B. Each sample was put into a sampling


sand tracing









cloth bag (2" x 4") with station number marked on the label, and then, sorted

into sample sets for shipping to Gainesville for tracer count in COEL.

B. February 1977 operation: Sands were collected at two locations of

site A for making tracers. The sands collected at the high-water mark were

dyed blue and green. The sands collected 100 feet bayward from the high water

mark were dyed yellow and red. These tracer sands were put back in four

locations. Their relative positions are shown in figure 4. The purpose of

this arrangement was to see if grain size and injection position influenced

the sand tracing technique. However, only blue tracers were counted for

the time being. The blue tracer alone was considered adequate for the purpose

of determining the littoral drifting direction.

The sampling frequency was chosen to correspond to the high and low water

level. The sampling procedure was similar to that for November 1976 operation,


4. Measurement of physical parameters:

A. Visual observations: Wave parameters such as height, length, direction,

and period, were observed during sampling operations. Littoral drift currents

were obtained by following a dye pack. These data are presented in the

results and conclusion section of this report.

B. Recording instruments: Two tide recorders were installed. One was

located at the Pensacola Beach Causeway Bridge. The second tide gage and a

wind anemometer were located at the private pier of Dr. C. Gifford. The

data are presented in the results and conclusion section of this report.









IV. RESULTS AND CONCLUSIONS


1. Results

The results are organized according to date and sampling sites in the

following tables:

A. November 1976 operation:


Equal Concentration Contours


Environmental Factors


Figures Site Figures Site

November 13, 1976 5a, 7a A, B 6a, 8a A, B

November 14, 1976 5b, 7b A, B 6b, 8b A, B


Wind records for the tracing operating period are given in figures 9a

and 9b. Tide records are presented in figures 10a through lOf.

B. February 1977 operation:


Date Equal Concentration Contours Environmental Factors

Figures Site Figures Site

February 15, 1977 la A 12a A

February 16, 1977 llb A 12b A

February 17, 1977 11c A 12c A

February 18, 1977 11d A 12d A

February 19, 1977 lie A 12e, 13a, 14a A, B, C

February 20, 1977 11f A 12f, 13b, 14b A, B, C


Wind records for the

figures 15a through 15e.

17a-17e.


period from February 15 to 20, 1977 are given in

Tide records are presented in figures 16a-16d; and


Date










2. Discussion and conclusion:


elliptical bars


arp point

transverse bars


land


F. Considerable bottom changes have taken place between November 1976

and February 1977. The shoals in figure 6b have grown both in size

and in height, as shown in figure 4b. A transverse bar situated

between 200 to 300 feet East (figure 4a) in the NE direction has

grown out of the water surface. Sandpipers standing on the dry

ridge of this transverse bar can be seen in figure 4c.


t


er


A. The observed wave parameters in Santa Rosa Sound are directly

related to the wind conditions.

B. There is an observable correspondence between the littoral transport

and littoral drifting currents.

C. Figures 5a and 5b have shown that the longshore movement was strong

than the on/offshore components.

D. Figures 7a and 7b have shown that the tracer sands moved around

the sharp land feature first and then towards the beach.

E. Many distinctive land features have been observed in the project

area, such as crescent sharp points (e.g. site B), and the semi-

elliptical submerged sand bar which is superimposed with transverse

bars in the NE and NW directions. It seems that all these have a

strong indication of edge wave effects.










G. Different patterns of tracer contour maps between November 1976 and

February 1977 are clearly observable. Contour map figures 5 and 7

are characterized by one peak region while figures lla to llf have

many peaks and valleys.

H. Peaks of the contour map, figures lla to llf, correspond to the

shoals in figure 4b and transverse bar in figure 4c very well. It

may be explained that the tracers left the point of injection and

moved along various route until they stopped at the shoals and

transverse bar.

I. There were relatively high concentration contours along the line

which was parallel to the shore and 300 feet north. A sudden

change in water depth, consequently, a sudden reduction of current

velocity bayward along the line was realized. This may explain

why the deposition of tracers along this line.

J. A study of the sequence of figures lla to llf may shed light for

bar formation in that area.



V. RECOMMENDATIONS



1. It would be desirable to extend the sand tracing study to cover the

summer months.

2. Correlation analyses between (1) distinctive land features, (2) sand

movements and environmental factors, would be most beneficial prior

to any shoreline activities such as a beach nourishment project.

3. The present study provided for the collection of considerable data and

the determination of the direction of littoral transport. It is recom-

mended that the study be extended to obtain additional information about

sand transport from the data already collected.
-6-










G. Different patterns of tracer contour maps between November 1976 and

February 1977 are clearly observable. Contour map figures 5 and 7

are characterized by one peak region while figures lla to llf have

many peaks and valleys.

H. Peaks of the contour map, figures lla to llf, correspond to the

shoals in figure 4b and transverse bar in figure 4c very well. It

may be explained that the tracers left the point of injection and

moved along various route until they stopped at the shoals and

transverse bar.

I. There were relatively high concentration contours along the line

which was parallel to the shore and 300 feet north. A sudden

change in water depth, consequently, a sudden reduction of current

velocity bayward along the line was realized. This may explain

why the deposition of tracers along this line.

J. A study of the sequence of figures lla to llf may shed light for

bar formation in that area.



V. RECOMMENDATIONS



1. It would be desirable to extend the sand tracing study to cover the

summer months.

2. Correlation analyses between (1) distinctive land features, (2) sand

movements and environmental factors, would be most beneficial prior

to any shoreline activities such as a beach nourishment project.

3. The present study provided for the collection of considerable data and

the determination of the direction of littoral transport. It is recom-

mended that the study be extended to obtain additional information about

sand transport from the data already collected.
-6-



























APPENDIX

List of Figures









LIST OF FIGURES


Figure No. Page

1. Site Location Map 8

2. Sampling Grid at Site A, November Operation, 1976 9

3. Sampling Grid at Site B, November Operation, 1976 10

4. Sampling Grid at Site A, February Operation, 1977 11-13

5a through 5b. Equal Concentration Contour for Site A, November
Operation, 1976 14-15

6a through 6b. Observed Littoral Current and Wave Parameters at
Site A, November Operation, 1976 16-17

7a through 7b. Equal Concentration Contour for Site B, November
Operation, 1976 18-19

8a through 8b. Observed Littoral Current and Wave Parameters at
Site B, November Operation, 1976 20-21

9a through 9b Wind Records, November Operation, 1976 22-23

10a throughlOf. Tidal Records, November Operation, 1976 24-29

11a through 1lf. Equal Concentration Contours for Site A,
February Operation, 1977 30-39

12a through 12f. Observed Littoral Current and Wave Parameters
at Site A, February Operation, 1977 40-42

13a through 13b. Observed Littoral Current and Wave Parameters
at Site B, February Operation, 1977. 43-49

14a through 14b. Observed Littoral Current and Wave Parameters
at Site C, February Operation, 1977 50-51

15a through 15e. Wind Records, February Operation, 1977 52-56

16a through 16d. Tidal Records, Private Pier, February Operation, 57-60
1977

17a through 17e. Tidal Records, Causeway Bridge, February Operation, 61-65
1977








I.


33.5;;;1?~


Np

>1-



I I


aROA


S..--


Site


Site A


Site C


pg


ALATEA INN


WHITE SANDS RESORT Q ^\C


Figure 1. Site location map


-- ."-'


34
r
.t
r


Ldj~
r


SSi~




















0 0 0 0 -o





0 0 0 0 C





0 0 0 0





0 0 0 0


o 0 0 0 0 0 0 0 0


o 0 0 0 0 0 0 0 0




0tae inetn 0point- 00 0 0
/ ^ / ^/ / / / / / / / /y '^ /~


Distance (ft.)


Figure 2. Sampling grid at site A, November operation, 1976


-300 o





0





-200 o

-P-
4-


)U 0




0
r-


a100o





o



77-~7
























o 100


0


0 0


Distance (ft.)


Figure 3. Sampling grid at site B, November operation, 1976
















Run No.
Color code:


0 0 0
o o o o








o o o o



0 0 0 0



0 o o
o a. a a


4275


0 a


175 o o


0 0


o o0


o F


0 0


@.- tracer injecting point

75 o o o o


'25 o o


0 0


Figure 4a. Sampling grid at site A, February operation, 1977


Date:
Time:


F o



E o


D o


o D


o B


SO 0 0 0 e o o o A


--W oo o o o o o \E--

300 200 100 00 100 200 .300
Distance (ft.)


125








































300




200




-100


Distance (ft.)


Figure 4b.


Shoal location


-12-


shoal


300


200


100


300


- ef 11 a W6-


[-





































300



200




100


transverse bar


Distance (ft.)


Figure 4c. Transverse bar location


-13-










Numbers = tracer sand count per 40 gm sample

@ = tracer sand injection point


Santa Rosa Sound





- water line

Land -


Distance (ft.)


Figure 5a. Equal concentration contours for site A
Date: 11/13/76


4-,
4-


100














Numbers = tracer sand count per 40 gm sample
H = tracer sand injection point


Santa Rosa Bay


__ w water


Land


200 100


Distance (ft.)


Figure 5b. -Equal concentration contours for site A
Date: 11/14/76


200


u_

u
100 .5
-4->
-n




9 -, -J


0 0 0

wave length: 10 ft.
wave height: 9 in.
wave period: 2 sec.
0 wave direction: NE300
date: 11/13/76 Time: 9:30 CST



O 0 0


0 0 0 0 0 0


Average current speed 0.23 fps


0 0 0 0 0 0





0 0 0 0 0 0


--,

0 0 0 0 0 0 0 0 0 0
-I*I













0 0 0 0 0 0 0 0 0 ,
o o o o a o < o o 8 o
t^
0 0 -->-^ 0 0 0 0 0 (i


Distance (ft.)


Figure 6a. Observed littoral current and wave parameters at site A




















wave length: 25 ft.
wave height: 1 ft.
wave period: 2 sec.
o Wave direction: NE
date: 11/14/77 Time: 8:40 CST



0o0
I~!O05"


o 0 0 0 o 300 0

Average current speed 0.72 fps


o0 0 a o o




0 o 0 0 o o -200 0


4-

0 00 C,
0 o 0 0 0 0 U 0
4'4"


0 0 0 0


0 0 0 0
OOO O


OO OO


0 0 0 0
tracer injecting point
0 0 0 0


Distance (ft.)


Observed littoral current and wave parameters at site A


Figure 6b.











Numbers = tracer sand count per 40
= tracer sand injection point



Santa Rosa Bay


gm sample
T 200


03 -
50

water line /

/ JLand


201 100 0

Distance (ft.)

Figure 7a. Equal concentration contoursifor site B
Date: 11/13/76
I











Numbers = tracer sand count per 40 gm

Stracer sand injection point













Santa Rosa Sound




water line / Land


0
Distance (ft.) I
I


200


Figure 7b.


Equal concentration contour for site B
Date: 11/14/76









wave length: 15 .ft.
wave height: 7 in.
wave period: 1.6 sec.
wave direction: NE
Average current speed V, = 0.25 .ft/sec
Date: 11/13/76 Time: 15:37 17:00


distance


represents sampling stations


,dye pack dropped


Figure 8a.


Observed littoral current and wave parameters at site B


-20-


i














wave length: 25 ft.
wave height: 1 ft.
wave period: 1.6 sec.
wave direction: NE
date: 11/14/76


Average current speed 0.77 fps


scale
O' 1o0'


Figure 8b. Observed littoral current and wave parameters at site B



















































5 mph

10 mph -

15 mph m

20 mph
Location: Private pier,Avenida 22, Santa Rosa Island

Date: 11/13/76


Figure 9a. Wind records



-22-

















































15 mph

20 mph

Location: Private pier, Avenida 22, Santa Rosa Island

Date: 11/14/76




Figure 9b. Wind records




-23-




















Location: Private pier, Avenida 22, Santa Rosa Island


Date: 11/9/76
+30 Time: 07:34 CST


+20

E
S+10

0

I>
~-10
Lii


Date: 11/10/76
Time: 07:34 CST


Hours


Figure 10a. Tide records
















Location: Private pier, Avenida 22, Santa Rosa Island


Date: 11/10/76
Time: 09:19 CST


Date: 11/11/76
Time: 07:50 CST


Hours


Figure 10b. Tide records

















Location: Private pier, Avenida 22, Santa Rosa Island






+3. Date: 11/11/76
Time: 07:53 CST
+2C
E
-,-
SI MSL

' > Hours
10
L.LJ


Date: 11/12/76
Time: 07:53 CST


Figure lOc. Tide records
















Location: Private pier, Avenida 22, Santa Rosa Island


Date:11/12/76
+30t Time:09:25 CST


Date: 11/13/76
Time:09:25 CST


Hours


Figure 10d. Tide records


+20
E
+10
0

1>
Lio

-20


















Location: Causeway bridge pier, Pensacola Beach


Date: 11/10/76
+30r Time: 08:22 CST


+20


-+10
r-
0


--10

-20

-30


Date: 11/11/76
Time: 08:22 CST


Hours


Figure l0e. Tide records



















Location: Causeway bridge pier, Pensacola Beach


Date: 11/11/76
+30t Time: 08:23 CST


+20
E
3-10

*r-
-10


LU

-20


-30


Date: 11/12/76
Time: 08:23 CST


Hours


Figure lOf. Tide records


I













', tracer injecting point'


300 200 100 00 100 200 300
Distance (ft.)


Figure 11a-l.


Equal concentration contours for site A
Date: 2/15/77 Time: 13:00 14:00 CST


I-- W













tracer injecting point


0//
,0


300 200 100 00 100 200 300
Distance (ft.)


Figure 11a-2.


Equal concentration contours for site A
Date: 2/15/77 Time: 20:00 CST


e--- W


--- o/











tracer injecting point


300 200 100 00 100 200 300
Distance (ft.)


Figure llb-1.


Equal concentration contours for site A
Date: 2/16/77 Time: 9:00 10:15 CST


30
^-


--- W


*60-


So~_












tracer injecting point


s'o-
- 60 oo-

220
a\ 0


300 200 100 00 100
Distance-(ft,)


Figure 11b-2. Equal concentration contours for site A
Date: 2/16/77 Time: 14:00 15:30 CST


200 300












0 tracer injecting point


15
Zo0
-........2 2




300 200 100 00 100 200 300
Distance (ft.)

Figure llc-1. Equal concentration contours for site A
Date: 2/17/77 Time: 9:00 CST













Stracer injecting point


-60
75









300 200 100 00 100 200 300
Distance (ft.)


Figure 1c-2. Equal concentration contours for site A
Date: 2/17/77 Time: 15:00 CST








































300 200 100 00 100 200 300
Distance (ft.)


Figure lld-1.


Equal concentration contours for site A
Date: 2/18/77 Time: 9:00 CST








































300 200 100 00 100 200 300
Distance (ft.)

Figure lld-2. Equal concentration contours for site A
Date: 2/18/77 Time: 15:30 CST













Stracer injecting point


o50
S100



--- @ --0



300 200 100 00 100 200 300
Distance (ft.)


Figure lie. Equal concentration contours for site A
Date: 2/19/77 Time: 11:00 CST













tracer injecting point





100-

50--- _
30
BD-


1 100


20

220-






300 200 100 00 100 200 300
Distance (ft.)


Figure 11f. Equal concentration contours for site A
Date: 2/20/77 Time: 11:00 CST















Date: 2/15/77


Wave height: 6 in.
wave period: 2.5 sec.
wave direction: NW
Average current speed: 0.51 ft/sec

Date: 2/16/77


wave height: 4 in.
wave period: 3 sec.
wave direction: NW
Average current speed:


0.23 ft/sec


Date: 2/17/77

wave height: 3 in.
wave period: 2 sec.
wave direction: NE
Average current speed: 0.21 ft/sec

Date: 2/18/77

wave height: 6 in.
wave period: 1.7 sec.
wave direction: NW
Average current speed: 0.33 ft/sec.

















Figures 12a, 12b, 12c, 12d
Observed littoral current and wave parameters at site A


-40-




















0 0


wave length: 12.5 ft.
wave height: 3 in.
wave period: 1.82 sec
wave direction: NW300
date: 2/19/77 Tim


F o.


D o



B o


0 0


e; 10:30 CST

0 0 0



o o0


0 0 ,0 0
3' 3 4! 1,'" 5W'o


0 0 0


0 0


,275


0 0


Average current speed: C1 = 0.46 fps

C2 = 0.59 fps



175 o 0 o "e o F

2


>125


0 0


0 0


o 0 o oD

0, 9 o o o o D


,75
>_ 4!" -{':


o 0. 0 @


o o0 0

0 .0 0


o B


N N


1O 200 150


-_Q --


IUO 50 go bO
Distance in feet


Observed littoral current and wave parameters at site A


u U


300


Figure 12e.


o E


~-?--C c~-~ _


m


c


I 3U


















G o


0 0 .0 0


12:30 CST


wave length: 10 ft.
wave height: 1 ft.
wave period: 0.5 sec.
wave direction: NW300
date: 2/20/77 Time:


0 0 0 0


E o


B o


0 0


Average current speed:


SG
o


C1 = 0.42 fps

C2 = 0.24 fps


175 o o


125


o o0


0 0 0 0


'25 o o


o o, 0 4o> o o o o
k-'\\ \ \.\ \


00 200 15o inn


50 00 50 100 150
Distance in feet


Figure 12f. Observed littoral current and wave parameters at site A


o F



o E


o D


o B














Date: 2/19/77
Time: 17:30 CST

Average current speed:
C = 0,32 fps
C2 0.45 fps





C


I\2


Observed littoral current and wave parameters at site B


0 50 100 (ft)
SCALE I


Figure 13a-1.














Date: 2/19/77
Time: 17:30 CST

Average current speed 0.35 fps


0 50s 10(ft)
SCALE


Figure 13a-2. Observed littoral current and wave parameters at site B















Wave length: 12.5 ft.
wave height: 10 in.
wave period: 0.5 sec.
wave direction: NW600
Date: 2/20/77 Time:


Average current speed: 0.51 fps


9:38 CST


scale
S 50 10b ft.


Observed littoral current and wave parameters at site B


Figure 13b-l.-














wave length: 12.5 ft.
wave height: 10 in.
wave period: 0.5 sec.
wave direction: NW600
Date: 2/20/77 Time:


Average current speed:


9:38 CST


scale

6 50 1bo ft.


Figure 13b-2. Observed littoral current and wave parameters at site B


= 0.44
= 0.36
= 0.58


fps
fps
fps














wave length: 8 ft.
wave height: 0.7 ft.
wave period: 0.5 sec.
wave direction: NW300
Date: 2/20/77 Time:


Average current speed 0.43 fps


14:00 CST


I I
0 50 100(ft)
SCALE


Observed littoral current and wave parameters at site B


Figure 13b-3.














wave length: 8 ft. Average current speed: C1 = 0.31 fps
wave height: 0.7 ft. C2 = 0.40 fps
wave period: 1.61 sec.
wave direction: NW300
Date: 2/20/77 Time: 14:00 CST ,






C
1
co


0 50 100(ft)
SCALE


Figure 13b-4. Observed littoral current and wave parameters at site B















wave length: 8 ft.
wave height: 0.7 ft.
wave period: 1.61 sec.
wave direction: NW300
Date: 2/20/77 Time:


Average current speed 0.41 fps


14:00 CST


0 50 100(ft)
SCALE


Observed littoral current and wave parameters at site B


Figure 13b-5.















Average current speed 0.40 fps


0 50 100(ft)
SCALE
Figure 14a. Observed littoral current and wave parameters at site C


Date: 2/1 9/ 77


Time: 16:03 CST














wave length: 10 ft.
wave height: 0.7 ft.
wave period: 1.75 sec.
wave direction: NW30"
Date: 2/20/77 Time:


Average current speed: C1 = 0,67 fps
C2 = 0.57 fps


13:00 CST


0 50 loo(ft)
SCALE


Observed littoral current and wave parameters at site C


Figure 14b.



















































10 mph -

15 mph

20 mph I

Location: Private pier,Avenida 22, Santa Rosa Island


Date: 2/16/77


Figure 15a.. Wind records



-52-



















































2.5 mph

5 mph

10 mph

15 mph

Location: Private pier,Avenida 22, Santa Rosa Island

Date: 2/17/77


Figure 15b. Wind records



-53-


















































10 mph

15 mph

20 mph

Location: Private pier, Avenida 22, Santa Rosa Island

Date: 2/18/77



Figure 15c. Wind records




-54-









































20hrs


10 mph -

15 mph

20 mph

Location: Private pier, Avenida 22, Santa Rosa Island

Date: 2/19/77



Figure 15d. Wind records


-55-



















































15 mph -

20 mph .

30 mph

Location: Private pier, Avenida 22, Santa Rosa Island

.Date: 2/20/77.




Figure 15e. Wind records



-56-















Location: Private pier, Avenida 22, Santa Rosa Island




Date: 2/16/77
+30 Time: 11:12 CST

+20

+10
o MSL


-10 Hours


Date: 2/17/77
Time: 09:05 CST


Figure 16a. Tide records















Location: Private pier, Avenida 22, Santa Rosa Island


Date: 2/17/77
Time: 09:10 CST


Date: 2/18/77
Time: 09:10 CST


Hours


Figure 16b. Tide records


-20

-30
















Location: Private pier, Avenida 22, Santa Rosa Island


Date: 2/18/77
Time: 09:35 CST


Date: 2/19/77
Time: 09:35 CST


Hours


Figure 16c. Tide records















Location: Private pier, Avenida 22, Santa Rosa Island


Date: 2/19/77
Time: 09:35 CST


Date: 2/20/77
Time: 08:38 CST


Hours


Figure 16d. Tide records


















Location: Causeway bridge pier, Pensacola Beach


+31. Date: 2/15/77
Time: 08:00 CST
+20
Date: 2/15/77
.-+I( Time: 16:25 CST
+10
0 MSL
0
> 0 Hours


-20

-30


Figure 17a. Tide records


















Location: Causeway bridge pier, Pensacola Beach


Date: 2/15/77
Time: 16:26 CST


Date: 2/16/77
Time: 16:26 CST


Figure 17b. Tide records


0


ni
ii-
















Location: Causeway bridge pier, Pensacola Beach


Date: 2/16/77
Time: 16:39 CST


Date: 2/17/77
Time: 16:39 CST


Figure 17c, Tide records


E
.+l,


-301


















Location: Causeway bridge pier, Pensacola Beach


Date: 2/19/77
0 Time: 09:00 CST


Date: 2/20/77
Time: 08:19 CST


Hours


Figure 17d, Tide records


C


I >
--10
Lii




















Location: Causeway bridge pier, Pensacola Beach


Date: 2/20/77
Time: 08:19 CST


I MSL I I I I 1 I


Hours


Date: 2/20/77
Time: 04:36 CST


Figure 17e. Tide records


+30

+201


E

0
0
I>
ai
S-10


-20

-30




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