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 Executive summary
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 Appendix














Group Title: St. Augustine beach nourishment project : Anastasia State Park St. Augistine Beach 1996 Phase I Report
Title: St. Augustine beach nourishment project : Anastasia State Park St. Augistine Beach 1996 Phase I Report
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Title: St. Augustine beach nourishment project : Anastasia State Park St. Augistine Beach 1996 Phase I Report
Series Title: St. Augustine beach nourishment project : Anastasia State Park St. Augistine Beach 1996 Phase I Report
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Creator: Donohue, Kerry Anna
Publisher: Coastal & Oceanographic Engineering Dept. of Civil & Coastal Engineering, University of Florida
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Table of Contents
    Front Cover
        Front Cover
    Title Page
        Page 1
    Table of Contents
        Page 2
    List of Figures
        Page 3
    Executive summary
        Page 4
    Main
        Page 5
        Page 6
        Page 7
        Page 8
        Page 9
        Page 10
        Page 11
        Page 12
        Page 13
        Page 14
        Page 15
        Page 16
        Page 17
    Reference
        Page 18
    Appendix
        Page 19
        Page 20
        Page 21
        Page 22
        Page 23
        Page 24
        Page 25
        Page 26
        Page 27
        Page 28
        Page 29
        Page 30
        Page 31
        Page 32
        Page 33
        Page 34
        Page 35
        Page 36
        Page 37
        Page 38
        Page 39
        Page 40
        Page 41
        Page 42
        Page 43
        Page 44
        Page 45
        Page 46
        Page 47
        Page 48
        Page 49
        Page 50
Full Text




UFL/COEL-97/008


ST. AUGUSTINE BEACH NOURISHMENT PROJECT:
ANASTASIA STATE PARK
ST. AUGUSTINE BEACH



1996 Phase I Report


by


Kerry Anne Donohue
and
Robert G. Dean


May, 1997


Prepared for:


St. Johns County, Florida













ST. AUGUSTINE BEACH NOURISHMENT PROJECT:
ANASTASIA STATE PARK
ST. AUGUSTINE BEACH

1996 Phase I Report








May, 1997


Prepared for:


St. Johns County



Prepared by:

Kerry Anne Donohue

and

Robert G. Dean


Coastal and Oceanographic Engineering Department
University of Florida
Gainesville, FL 32611










TABLE OF CONTENTS


LIST OF FIGURES ..............


EXECUTIVE SUMMARY .........


1. INTRODUCTION ..........


2. BACKGROUND ............


3. DATA COLLECTION .......


3.1 Topographic Surveys .......

3.2 Sand Samples ............

3.3 Photographic Documentation..


4. DISCUSSION.................

4.1 Beach Profiles ...........

4.2 Sediment Analysis .........


5. SUMMARY AND CONCLUSION


6. REFERENCES ...............


APPENDIX A:


APPENDIX B:


APPENDIX C:


APPENDIX D:


................................ 3


................................ 4


................................ 5


................................ 5


................................ 8


................................ 8

................................ 9

............................... 10


............................... 10

............................... 10

. . . . . . . . . . . . . . . .. 15


. ............................... 17


. ............................... 18


BEACH PROFILES: SOUTH SECTION .............. 19


BEACH PROFILES: ANASTASIA STATE PARK ...... 32


SEDIMENT SIZE STATISTICS SOUTH SECTION .... 40


SEDIMENT SIZE STATISTICS ANASTASIA
STATE PARK ................................... 47









LIST OF FIGURES


FIGURE

1

2

3

4

5

6


7

8

9

10

11


PAGE

Aerial Photograph of St. Augustine Beach and Inlet .................... 6

PhaseI SurveySchedule ...................................... 7

Erosion Rates: St. Augustine Beach South Section .................... 7

ErosionRates: Anastasia StatePark .............................. 8

Profile Locations ........................................... 9

Beach Profiles at Monument R147 C Street, St. Augustine Beach, South
Section ................................................ 11

Total Volume of Sand Above NGVD in South Section ................. 11

Total Volume of Sand placed by Dredge in South Section ............... 12

Additional Beach Width since January, 1996 South Section ............. 12

Density of Sand Volume above NGVD since January, 1996 South Section ... 13

Total Volume of Sand Above NGVD Anastasia State Park ............. 14


12 Additional Beach Width since January, 1996 Anastasia State Park ......... 14

13 Density of Sand Volume above NGVD since January, 1996 Anastasia State
Park .................................................. 14

14 Grain Size Distribution for St. Augustine Beach R146.3 ............... 15

15 Mean Diameter of Sand- South Section ........................... 15

16 Standard Deviation of Sand Size Distribution South Section ............. 16

17 Mean Diameter of Sand Anastasia State Park ...................... 16

18 Standard Deviation of Sand Size Distribution Anastasia State Park ........ 17










EXECUTIVE SUMMARY


The following report documents the results of the monitoring of the 1996 St. Augustine Beach
Nourishment. Two sites were nourished by the US Army Corps of Engineers in the Spring of
1996, in conjunction with a maintenance dredging project at St. Augustine Inlet,. Wading beach
profiles were measured and sediment samples were collected periodically during nourishment
and for six months after the initial placement of sand.

The southern site, located south of Anastasia State Park, was nourished first, commencing in
February, 1996, and concluding in April, 1996, whereby 110,000 m3 (144,000 yd3) of sand was
placed over a shoreline length of 800 m (2,600 ft). The northern site, in southern section of
Anastasia State Park, commenced nourishment in May, 1996, and was finished in June, 1996. At
this site, only 300 m (1000 ft) of shore line was nourished with 20,000 m3 (26,000 yd3). The total
volume of sand placed at the two sites, 130,000 m3 (170,000 yd3), was considerably less than the
240,000 m3 (314,000 yd3) of sand originally proposed for the sites. The proposed volume was
not met due to various factors, including severe weather conditions before and during sand
placement, a northeaster which hit 20 days after placement commenced, equipment malfunctions,
and the start of turtle nesting season on June 15, whereby it is required that dredging operations
cease.

At the southern site, 7 profiles were monitored during the placement phase. After the placement
was completed, 4 profiles were added to include the adjacent "spreading out" area. At the
northern site, 7 profiles were monitored during the placement phase and for 6 months after
operations ceased.

While it was anticipated that the short length of the project would severely limit the longevity of
the nourished sand in its initial placement site, the monitoring results indicate that the project is
performing much better than anticipated. After 4 months, at least 50% of the sand was expected
to leave the area at the southern site. However, 94% was still in the area after 4 months. When
the monitoring stopped, 6 months after completion of placement, 68% of the sand was still in the
initial segment of beach. At the northern site, the initial nourished beach segment was so small
that essentially all the nourished sand left the area before the 6 months. The erosion rate at the
northern site is extremely high, on the order of 7 m/yr (21 ft/yr), as compared to the 1 m/yr (3
ft/yr) erosion trend at the southern site.

Two factors of the nourishment that are relevant to its performance include the larger sand
particle diameter of the nourished sand, and the placement of the material at an elevation higher
than mean sea level. These factors seem to be favorably affecting the nourishment's longevity,
especially at the southern site.









1 INTRODUCTION


This report is the first in a series documenting the evolution of beach nourishment at St.
Augustine Beach, Florida, (Figure 1). In the Spring of 1996, the US Army Corps of Engineers
(USACE) placed approximately 130,000 m3 of beach quality material at two sites on the beach
face as a part of a maintenance dredging project of St. Augustine Inlet. This was the first time St.
Augustine Beach had an on-shore nourishment project of this magnitude. The quantity was
considerably less than the planned 240,000 m3 of sand, as dredging operations were limited by
severe weather conditions and dredging equipment malfunctions. These problems caused the
sand placement operations to extend over a four month period, from February to June of 1996,
significantly greater than the planned one month period. Both sites were monitored every four
weeks during placement and for a six month duration after the dredging and pumping operations
ceased, (Figure 2). The USACE plans to repeat the maintenance dredging/beach nourishment
project in 1997. This monitoring study involved topographic surveys and sediment analysis at
the two sites. The proposed study is planned to continue for another year. Nourishment during
the Fall, 1997 is being considered.

2 BACKGROUND

The nourishment areas have many interesting facets. Before the present St Augustine Inlet was
cut and stabilized in the 1940's, a natural migrating inlet existed. The presence and maintenance
of the stabilized inlet has stressed the study areas, which are located between 5.8-8.8 km (3.5-5.2
miles) south of the inlet. Approximately 900,000 m3 of material has been dredged from the inlet
since 1970 (USACE, 1990), all of which has been placed in the offshore or near shore region.
The 1987 report, Florida's East Coast Inlets, Shoreline Effects and Recommended Action
(UFL/COEL-87/017) states that the USACE net littoral transport rate estimate in the St.
Augustine Inlet area is between 270,000-310,000 m3/year. A wave height rose produced by the
US Weather Bureau in Jacksonville shows the dominant waves propagating from the east and
northeast. The 1976 St John's County Beach Erosion Study identified two eroding locations in
the county's shoreline: one immediately south of the inlet, and the other at St. Augustine Beach.
Unsurprisingly, these were the two sites chosen for the 1996 beach nourishment.

The south study area ranged from DNR Monuments R145-R149. The beach at the south site is
eroding at an average rate of 1.16 m/year, since the construction of the stable inlet in the 1940's.
(Figure 3) The site has been identified consistently as an eroding beach. The USACE 1977
Feasibility Report for Beach Erosion Control in St. John County mentions the 4 km (2.4 miles)
stretch of beach in front of St. Augustine Beach as one characterized by an erosional trend. The
erosion is mainly caused by the federally maintained inlet 6.5 km (4 miles) north. The portion
2.8 km (1.7 miles) north of A St. (126 m south of R146) to 1.3 km south of A St. is in an initial
stage of advanced erosion. The remnant of a smaller revetment, extending from the edge of a
large revetment at the north end of the site, to A St, was visible in January, 1996. It was buried
by nourished sand initially. However, it became exposed again in October, 1996.







































gourishmeint AreaJ2
Filled: from 5/10 In b/t 5
Final length' "Wlm


-. Rock Rcclmenl





lounrishment Area #
i'illed: from 2120 1o 42,M
Final Length: .42m


Figure 1: Aerial Photograph of St.


Augustine Beach and Inlet (taken 11/88)












Figure 2: Phase I Survey Schedule


January 1, 1996




South Survey,............................. -
March 1
Northeaster 3/10-3/12

South Survey


May 1
South Survey
North
Nourishment
Began
orh .....................111 8 I. .. ).
North & South July 1
Survey




North & Sout'"""""""""""""''
Survey September 1





North & South
Survey November 1


.............................................. re N ourishm ent
Survey: North and
February 1 South

South Nourishment Began

..................................................... South Survey

April 1

.South Survey



June 1 ...............................................
oth North & South
North Survey
Nourishment
Ended

.......................................................... N north & South
August 1 Survey




.......................................................... N north & South
October 1 Survey






. ce..... ..... .......... ............................... N north Survey


EROSION RATES: ST AUGUSTINE BEACH: SOUTH SITE
--- R145
600 ....A M.. 4
R147A
S .....4 : 8A
oo"o .. ... . .. I- R149
F- 500 ^"--


"400
O AVERAGE SLOPE::
SM i,-1M.2 MR OR -3.8 FT/
2 300 ,.- :--: .... .
0

200. "0.
I -------------

100

1950 1960 1970 1980 19
YEAR
Figure 3: Erosion Rates at St. Augustine Beach: South Site










There is a 670 revetment separating the two nourishment sites. This revetment, constructed in
1964, was extended 550 m to the south in 1975, with coquina rock. The revetment was
extended approximately 30 m again by a private property owner to its current configuration.
This places the revetment's south edge at 156 m south of R145, which was the north edge of
where the nourished sand was initially placed at the south site .

The north nourishment site is Anastasia State Park, ranging from monuments R139-R141. It
experiences 7.36 m/year of erosion, (Figure 4). Rip-rap is scattered on the beach, located
approximately 30 meters seaward from the baseline set for this study (baseline is approximately
the vegetation line). The rip-rap is more consolidated in the southern end of the park. Rip
currents are known to be common in this area, as the discontinuity of the shoreline causes waves
to build up in this area (Olsen, 1988).



EROSION RATES: ANASTASIA STATE PARK


1000
900
8- 00
z
Too
L 700
z 600
0
O
So500
400
0
L 300
_ 200
z
S100
0


-R- R138
A... R13g
R-1- R140
............. .. -
R141


AVERAGE SLOPE:
-7.4 MYR OR -24.1 FT/YR


1950 1960 1970 1980 191
YEAR
Figure 4: Erosion Rates at Anastasia State Park


3 DATA COLLECTION



3.1 Topographic Survey

A standard survey level was used to determine the elevation, while a 100 m tape measured
distances seaward. A compass was used to establish the azimuth of the profile lines.
Mobilization of a boat for offshore soundings would have increase the monitoring costs
substantially, and was not justified considering the reduced accuracies attainable by sounding
and the small nourishment volumes placed. At the south nourishment site, 12 profiles were
surveyed each visit. These profiles are presented in Appendix A. At the Anastasia State Park
site, which was nourished later, 7 profiles were monitored on 7 dates. These profiles are









presented in Appendix B. The locations of these profiles are illustrated in Figure 5. Each profile
was surveyed to wading depth, unless pumping operations prevented entrance to that section of
the beach. Initially, the surveys were scheduled around low tide. However, during the days in
which both sites were surveyed, time permitted only one of the two surveys to be performed
during low tide. This affected the length of the profiles, as the tidal range fluctuated 1.5-1.75
meters. The gentle slope of the beaches made this wide tidal range even more pronounced.
Also, the "wading depth' was a function of the wave climate, which varied from mild to severe
throughout the year.



R139
140 Anastasia State Park
." .. (North Section)
R141 -
A__ armored
R142 -Shoreline N
Fishing
Pier
15 -- --------
R145 -P
R146A ...... St Augustine Beach
R147A ........ (South Section)
R148 ...

R149 ------ Surveyed Profile Locations
Shore Baseline

Figure 5: Profile Locations



3.2 Sand Samples

At a minimum, one sediment sample was collected during each survey at the waterline from the
profiles where the DNR Monuments were located. On occasion, samples were collected at 20
meter intervals along the profile. The samples were dried, split, weighed, saturated in water for
24 hours, and the size characteristics determined by a Rapid Sediment Analyzer (RSA), an
apparatus developed by the University of Florida Coastal Engineering Laboratory The
apparatus makes use of the particles' settling velocities to determine the sediment size
distribution. Periodically, sediment samples were compared with sediment size distribution data
obtained by the traditional sieving method, and the mean diameters fell within 0.01mm. Over
100 samples were analyzed. These data are presented in Appendices C and D.








3.3 Photographic Documentation


Both color and black and white ground photography was used to visually document changes in
the beach as the nourishment evolved. In the southern section, photos were taken in a panoramic
sequence at an elevated position approximately 50 meters north of R147, close to the center of
the nourishment, and at critical locations in the nourishment placement process. In Anastasia
State Park, sequential photographs were taken at R141. The reader may contact the authors
regarding the availability of the photographs.


4 DISCUSSION


The beach profile and sediment data are discussed briefly below, with all results found in the
appendices

4.1 Beach Profiles

During the 1996 project, the sand was pumped hydraulically on to the berm, which was
approximately 2.5 m above NGVD. Figure 6 is an example of a profile in the center of the south
section nourishment site, R147. This is the standard shape of the profiles measured inside the
nourishment area. Interesting variations in the data occur when the profiles are compared to the
January pre-nourishment profiles. The baseline for this section was established at a 0 degree
azimuth line, commencing from a beach walk over piling, as a replacement for R148 (which was
missing). The profile lines followed a 85-90 degree transect towards the Atlantic Ocean. Figure
7 clearly shows the progression of the sand being placed on the beach until May 2, when
placement was finished. After May 2, the sand in non-equilibrium quickly disperses to the
adjacent beaches. This "spreading out" loss remains constant until September, when both inside
and outside the nourishment area experience volume deficits.

Note that Figure 7 only includes the sand volumes above NGVD. Various approximation
methods were investigated to extrapolate the short profiles, so the fluctuations of sand volumes
in the surf zone could be compared between each survey. However, a satisfactory method was
not found. Thus, while the above NGVD volume and density figures presented are accurate,
sand bar formation and dispersion below NGVD is only displayed in the profile plots of
Appendices A and B. Figure 8 is the cumulative amount of sand the dredging company emptied
from the hopper dredge at each survey date. The sand normally was hydraulically pumped from
the hopper onto the beach. The dredger's final volume was approximately twice the above
NGVD volume calculated by the surveyed profiles. The sand not accounted for was either
below NGVD, or was carried away by longshore or cross shore transport processes.








147 C Street South Section
-- Jane
S...... Fe24
3.0 E-Min ---
2 .0 ............ ........... ....... ........ ... .." ...
--+-- i~rfl
2.5 *e** --F- 120o
-20y2
2 ...... .......... ..... ...... u .......

1.5 -.0- jU 2
S .5 ......... ....... j pt2
,,,-- -o ... .... ............. ..- .........




5 -0.5
-1.0- ........


-1.5
I 00 ......i. i
-1 .5 ......... .... ... .......... .. ..... i.. ...... ...............



0 20 40 60 80 100 120 140 160
Distance Seaward (m)
Flaure 6: Beach Profiles at DNR Monument 147a C St.




Total Volume of Sand above NGVD South Section
Since January, 1996 St Augustine Beach Nourishment 1996
- Tm 8wuy Ar
.......... ................ .i .. ...... . ........... .. .... A Int "W i At m
4-r-

Nu n0 e ARbr Marc Nbrtheaoter
70 F n ..i ........... ..- --. ... ... ............. I ........... .






S1...............
o .. -. .... .... .. .... 'W .......... ..... .... .... ....
50 ........ .. .... .. .. .................. :....... ....... III ... ..... ... ..............
s 4 0 .... . ...... .... .. ... ...... .............. .. ..... ........... .... ...............






0 50 100 150 200 250 300
Days Since Start of Nourishment
Figure 7: Total Volume of Sand Above NGVD In South Section




On May 2, 5 days after the south nourishment operations ceased, the additional beach width in
the nourished area ranged from 27 to -26 meters. Figure 9 shows how the additional dry beach
width fluctuated as the nourishment evolved. Figure 10 illustrates the movement of the
nourished sand in the cross sections of the profiles, above NGVD. Both Figures 9 and 10
indicate an erosional hot spot in the R148-R149 region, just outside the nourished area.
However, a closer look at profiles R148-R149 in Appendix A indicate that the January 9 profiles
were unseasonably high. Since all profiles are compared to this pre-nourishment profile, it
appears as if this area is an erosional hot spot.


11










Dredging Records
Sand Collected by Hopper Dredge

!120
"D 12 0 ......... ......... .............. ............. ............. ........ F h e

I8 0 .. ....... ... ......... .. .............. . ....................... .... ...
LA 9 .. .. ... ............ ............................... ..... ...... .............. ..... ....... .................
( 6 0 ........ .............. ............. .............. ... ... . . . .. ......... ..... .. ...... .............. ....
two
.. ..... ... ............... .............. .............. ... .. ....... .. ........ ....
70

5 Q ............... ......... .. .. ............ ...... ....... ....... . .. .......... ............ ....
w 40
30 r..1.
S30 irc Nortthester
M 20 .
10 ..... ..

0 10 20 0 40 50 60 70
Days Since Stat of Nourishment
Figure 8: Total Volurr .SWn.Colected by Dredge
In 1oum becuon







Additional Beach Width since January, 1996
South Section --- P24
-.... M lar
50 -+-


30 --*-- jul28
5 0 ......... ............... I ............... ....... .. ....... ................"......... . .
...0 ma- .ry
S4 0 .....4 ....... ...." ............ . ....... ... ........... .......... .o .-. j .............
S.I // \ 'ju

-20





N End of Nourishmnt
-30 ..-...... ........- .. . .-.. ......... ............ -E t N i h t
-. -S p ...........



R145 R14A R147A R148 R149

0 200 400 600 800 1000 1200 1400
Distance South from R145 (m)
Figure 9: Additional Beach Width Since January, 1996 In South Section




It is interesting to note that the northern end gained more from the "spreading out losses", which
could be explained by waves propagating from the south, typical in the summer months when
those surveys took place, or could be due to the presence of the revetment projection at the north
end.


12












Density of Sand Volume, Since Januar 1996
"m South Section -*- F
S-160 A-- *-- 9
...e o -. .. ............... ............... ...... ........ ............ ................... Qn, ""
1 2 0 I- ....... ............... ...... ............... ... .. ...... ................ j' ... .
S10 Ii -i-
.. .1............/..............0.. ..... ..... .......u ...

= ,0 .... ....... ...... .. .. ............

20 -...... ... ........
4: 0 ........ ".
__ -20 .. .. . ".

S-40 R146A IR14-A j R148A 149
0 200 400 600 800 1000 1200 1400
< Distance South from R145 (m)
Figure 10: Densityo~f e Since January, 1996







A severe northeaster hit the region from March 10-13, 1996. The north Florida Atlantic coast
experiences a typical March significant wave height of 0.5 meters. However, from March 10 to
March 13, waves were ranging between 1.0- 2.1 meters. The storm halted beach pumping
operations for over 2 weeks. The effect of the storm is evident in all the March 29 profiles, and
in Figures 9 and 10 which vividly display the sand lost. During the 20 day interim between
surveys, Figure 7 shows how 14,000 m3 of sand was lost above NGVD, even though the
dredger's log indicates that 11,000 m3 was placed on the beach in that same 20 day interim.


Anastasia State Park received much less sand than planned by the USACE. The sand was placed
between May 15 and June 15, when the dredging/pumping activity ceased due to the onset of the
turtle nesting season. Most of the sand was placed between R140 and R141. Figure 11
illustrates the evolution of the total volume of sand inside and outside the initial sand placement
area. The presence of the rip-rap in the swash and surf zone consistently caused difficulty in
documenting the presence of any sand bars. Thus, only above NGVD data was considered for
the park site. The additional dry beach width in between these two monuments on June 29 (14
days after nourishment completion), ranged from 6 to 24 meters, seen in Figure 12. There
appears to be a minor nodal point and/or erosional hot spot at R139.7, which is evident both in
Figure 12, and in Figure 13, which displays the density of sand volume.








Total Volume of Sand above NGVD
1in Anastasia State Park

S12 i i I N ourAm A
o ... .. ..... ........... .. .. . .. ...

,8 1: .......
8




-1 .... ... . i .... .. .. ....... ...... ....... ..... .... I..... ...
.0

02

t-


0 20 40 60 80 100 120 140 160 180
Days Since Start of Nourishment
Figure 11: Total Volume of Sand Above NGVD since January, 1996
in Anastasia State Perk



Additional Width of Beach, Since January, 1996
Anastasia State Park

S --A-. Ju.i2
--D- July25 *'|
" 30 AOuau g ""
2 --,- o-0 .1 ,
"5 2 0 "" '- I " D ie l ** 1,

10







S-20
<20 -- R14 R141


0- Anastasia State Park
0 I ... ....... .. .. .....
3 60 ........ ..... .. .... 0 "'w ud "2 ..... ........... ............. ....... ..............

.0 ;4 Sept 22' 1

















10 -- ^^Oat 27n
A-

















20
10
0
-100 0 100 200 300 400 500 600
Longshore Distance South from DNR139 (m)
Figure 12: coronaa! Ilac .Wldfb Sce January, 19A o















Density of Sand Volume, Since January, 1996
n Anastasia State Park
7 0 ........ -. ..... ....... A ... .. . .. ...- .-... ...


A 0 ."--', ......... 2"
6 0 J.... .......: .............. ... .-a

". 0. ........
4 0l



0




-100 0 100 200 300 400 500 600
Longshore Distance South from DNR139 (m)
Figure 13: Density of Sand Volume Since January, 1996
In Anastasia State Park











4.1 Sediment Analysis


For the southern site, the average mean diameter of the native beach sand was 0.18 mm, while
the average mean diameter of the fill material was 0.35 mm (Figure 14). The larger beach fill
diameter should enhance the longevity of the project. The sand collected during the placement
phase (February-May) have the largest mean diameter (Figure 15). As time progressed, the sand
became well sorted, with the mean diameter fluctuating around 0.18 mm, the native mean grain
size. In Figure 16, the varying standard deviations at R145 and R148A indicate that the
nourished sand is slowly progressing into those border areas. In all other areas, the sand is
medium to well sorted.




Grand Size Disibution for St. Augusine Beach R146.3

10I 0 l- : m







80 -O = -...
50










Grain size (mn]


Figure 14: Grain Size Distribution for St. Augustine 1996 Beach Nourishment: Native and Fill Sediment Comparison
Figure 14: Grain Size Distribution for St. Augustine 1996 Beach Nourishment: Native and Fill Sediment Comparison


Mean Diameter of Sand, South Section


0.52



0.4A2 ...........



0.32 A
!X


I 4
0.22 -


1456


South Section Fra U
..' ........................... .. .......... A mw hI w L.
;* Meci.9Wa .
S* Ar 20 W
x oV M1 f.






O 22X Ameaneur
.............. ...... ..... ..................... 3 JX SI2 W







S 0 0i ,|22W
V OW 23 ML


A A I 29 Bi

o WL Water Lin



R146A R147A R148A R149


12' j ',,'
0 200 400 600


800 1000 1200 1400


Distance South from R145 (m)
Figure 15: Mean Diameter of Sand in South Section


I









Standard Deviation
South Section 24V*_
a umh e2WL
X Apdari l.
T My2WL
...... ............................... ............... ............... ............. 0 June I V&
A JuwaW.
C 0 July 25 Wl.
.B V Sp 22 WL
.... ] i I.fve sa- ....... ,
SMptive San -- 1 anOBuom
f _5 ..... ................................... -... ...... ............... ......
X 1.5 e 24 s
Mardi 29 m
S 0 X Apdi2OBorm
S 1.0 * II WL = Water tine
1 .0 ..... ............. ... .... ..... ... .. .. .............. ......... T-.-. ............. .. ... ...

O.5 ............ . .. .9
145 R146A R14A R148 R149

0 200 400 600 800 1000 1200 1400
Distance South from R145 (m)
Figure 16: Standard Deviation of Sand Size Distribution in South Section





In Anastasia State Park, the native mean grain size diameter was 0.175 mm. The mean diameter
varies more at R141, in the nourished area. However, with the exception of the R141 June 28
sample, all samples are well sorted, ie., have standard deviations less than 0.5. The influence of
the nourished sand size distributions at the park is minimal because of the small amount placed.




Mean Diameter of Sand, Anastasia State Park

Native Sand-- Jan sm
S ............. ........ .... .. .......... . .......... A Ju ,1 W ...........
0.23 ... A w .........
M June2BW.
July25VW
S .22 ..... .............. ...... .............. ............. A g.
0.22
E 0O Se p22WL
2 ........... A..
... 0.21 .- . ........... ....... ... .
0.21
.a WL = Water Une


0.19
E ... ............. ......... .................. .............. .............. ......... .... ..... ...

. . . . .. .. . ... .. . . . .. . . . . .. . . . .. .. . .. . .... .. .. . . .. . . . .. . . . .. . . ...






-100 0 100 200 300 400 500 600
Distance South from R139 (m)
Figure 17: Mean Diameter of Sand in Anastasia State Park









Standard Deviation, Anastasia State Park
0 .7 ...... ..................... .......................
Naive Sand A --- I Jwi .
SJume 28 WL
0.6* Jy25WL
S .............. ............. ......................... .. A 2 WL........
SAug 22W.
0 SWt22V.
WL = Water Lne A o27 W
0 .5 ..... ...... . ...... .... ............. ..... ..... o .. .. .

S 0.4 ..... ...... ..... D c I .....
S0.4
S . .. .......... ........... ..... ......... ......... ........ ... ... ......... .. ... ..... .. ....
0 .
Si o

..... *.. .* | .
0 .. . ..... ...... ............. ....... ... .......... . .... .. ......... ... .... .. ..... .....
02
S R1M39 R14p, R141
-100 0 100 200 300 400 500 600
Distance South from R139 (m)
Figure 18: Standard Deviation of Sand Size Distribution
in Anastasia State Park






5 SUMMARY AND CONCLUSION



In conclusion, it is evident that the nourished sand on the beach is providing a significant
measure of protection. The small volume placed and the short nourished beach length will
severely limit the life span of the project. While both sites in general had short nourished beach
lengths, when comparing the two sites, the longer south section is retaining the original volume
considerably better than the shorter Anastasia State Park site. This scenario reinforces the trend
of increased longevity with nourished beach length; however, this interpretation is complicated
by the difference in background erosion rates: 7 m/yr at the northern site, verses 1 m/yr at the
southern site. If the characteristics of the south section nourishment (deep water wave height and
group speed, shoreline orientation, vertical length of nourished sand in profile) are considered,
the expected half life of the nourished sand is on the order of 4 months. However, as of the last
survey, 68% of the nourished sand was still in the initial beach segment. At 4 months after
construction, 94% of the nourished sand was still in the initial beach segment. The increased
longevity is attributed to the coarse sand fill, and the placement of sand at a considerably high
elevation on the beach profile. The effect of the these two factors is a subject needing further
documentation and analysis.









6 REFERENCES


Florida Coastal Engineers, Inc.. "St. Johns County Beach Erosion Study" Jacksonville, Florida
1976.

Olsen Associates, Inc.. "Shoreline Restoration Study. Anastasia State Recreation Area St. Johns
County, Florida". June 1, 1988. #NR-87101011.

U. S. Army Corps of Engineers, Jacksonville District. "St. Johns County Beach Restoration
Management Plan". 199?.

U. S. Army Corps of Engineers, Jacksonville District. "Feasibility Report For Beach Erosion
Control. St. Johns County, Florida. 1977.

U. S. Army Corps of Engineers, Jacksonville District. "St. Johns County, Florida, Beach Erosion
Control Project", 1990.

War Department: Beach Erosion Board, Washington, D.C.. "Report on the Effects of Proposed
Navigation Improvements on Adjacent Shore Lines at St. Augustine, Florida". 1947









APPENDIX A






145 In Front of Revetment (Outside Nourishment Area)
St Augustine Beach: South Section
5-
5 . . . . . . . . . . . - - - - - - --- - -. . . ... . .. . - - - - - - - - - - -- - - - - - - - - -- ----- -
S-0- January 9 (estimated)
--A-- June 1
4 -- --- June 28
i l ... '.. July 25
I August 22
E 3. ............ ....... ... ..... ............ Septem ber 22
... O October 27

> 2

O 1
.. ...... .. . . . . -- - -_ _-.. .


-o-- -------------------
-0

-- -1- - - - - - .: . .- - . . .
w------------- --- .

-I I 1 I I I I I
-2
0 20 40 60 80 100 120 140 160

Distance Seaward (m)






145.3 -On Stoop in Front of Revetment


(Outside Nourishment


E


(9
z
0

I)
w


Ar


ea)



- \ :


St Augustine








0- ----- -- -- --


Beach: South Section


January 9 (estin
--iA-- June 1
--D-- June 28
*** ... July 25
August 22
-- September 22
... O... October 27



V


F


120


. . . . .i. .


140


160


Distance Seaward (m)


nated)


I I


20


I I


40


60


I I


80


100


- r. I I I.






145.6 Edge of Revetment

St. Augustine Beach: South Section





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






.. ..... ... . ...... .. .. ... .. ....


IIl


N---


40


60


80


100


120


Distance Seaward (m)


E





0
0U
w-

CD
W,


-1



-2


20


140


160


.


---- January 9
...A.. February 24
-'-"- March 9
----- March 29
-f- April 20
-'O-" May2
--- June 1
--L- June 28
.***...* July 25
- August 22
-I- September 22
*0 .... October 27


.


. . . . . .


I






145.7 South Edge of Revetment and Nourishment
St. Augustine Beach: South Section
5 - - - - - - - -- - --- - - - - - - -- -- - - --.. .- - - - - - --.-.-.. . . . . . .__-_-_-- --.* .. . . . .
S- January 9
A.... & February 24
4 .. March 9
S---- March 29
- April 20
01 3 . . . .- . .. 1 - - --- - - - - - - - - - - - - - - - - - - -. . . . . . ...... . . . . . ---- - - - - - - -- -
S. "'-..' May 2
S--A-- June 1
S2 -- --0-- June28
> .... July 25
4, August 22
Z1 . .... .. ... . September 22
S. October 27

> . . . .- - - .

-2 0 .------.-.... .. .. .. .- I. ...... . ... -- - - - . .... . ........- - .--


-2 ,
p I I i l I I I p
0 20 40 60 80 100 120 140 160

Distance Seaward (m)







146 Beside 2 Story White Slate House

St. Augustine Beach: South Section









; ------------- ...... --------: s ~
A-









"-" \ \
'-



-
... ... ...










II I I I IP I I


20


40


60


80


100


120


140


- Janua
SA .... Febru
-*- March
--- March
-V-- April 2
-*O--- May2
-A-- June
-D-- June
S ..." July 2
V Augus
I-T- Septea
S*0 .... Octob








I


160


Distance Seaward (m)


Q


(D
(9


0
tC
O



U.


ry 9
ary 24
9
29
!0


28
5
t 22
mber 22
er 27







146.3 A Street


St.


E






0
c>

UJ


100


120


Distance Seaward (m)


Augustine Beach: South Section







.-! \I
- - - - - - - - - - - - - - - -

................ .. ........ I . .
Ai


-f-i V


N


--
-- - - - -
- 0- -
I ',


- January 9
A .... February 24
.-.-.- March 9
---4-- March 29
9-- April 20
* 0-- May2
--A--- June 1
--D--- June 28
*....* July 25
August 22
S September 22
* ..... October 27


I ~-i--~~-


I I


20


40


60


80


140


160


I I I I I n


dh ~,


. .


U







146.7 B Street
St. Augustine Beach: South Section

January 9 (estimated)
.....- .... .... February 24
S-.1-.. March 9
-- -- March 29
i . . . . . . -- - - - - - - - - --.. . . . . . . . . . . - A p i 2
-- April20
-'O'-'" May 2
"... . .......... --A-- A gJune 1
\1--E-- June28
July25
.-,--- August 22
S September 22
..... O October 27



.. ..... .. ... .. .. ... .. .... -- -- - - - - - .... .. _.... ..... .


20


40


60


80


100


120


140


160


Distance Seaward (m)


E



z
C



0

ci
4-j
C>


I )


-












3.0

2.5


40


60


80


100


120


140


160


Distance Seaward (m)


147 C Street
St. Augustine Beach: South Section
0- January 9
... February 24
S-'-- March 9
- - - - - . . .. . . .,. . . . . . .,.... . . . - - --- - -r c 2
-4.--- March 29
S--- April 20
S.-.0- May 2
-- ....... --A - June 1
S:I ---- June 28
.** July 25
-7 August 22
S.. .... --- September 22
..... ' ''^ \ .... 0 .... O ctober.27
0 October 27
.-....--'-VT----- .'. ---------


'd
- _- .- ..- .- ..- . ....... .... . . . . . . . . . . . . . .

. . . . . . .. . . . . . . .. . . . .. . . . . . . If -.- - - -

A2
- - - - - - - - . . . . . . . . - - - - - - - - - - -


E

(1

O
C
0

JD
U)
W


2.0

1.5

1.0

0.5

0.0

-0.5

-1.0

-1.5


-A


20


------------







147.5 Dune Walk-Over with Platform
St. Augustine Beach: South Section
SJanuary 9 (Estimated)
.... .... February 24
S- ............. March 9
3 r i i ----- March 29
-f- April 20
E .-.o-... May2
,9z 2 ........ .............. .... .. -- ,--- --.-' \ .. ...... ........._ _ _..._ A u g ust 22Ju ly.Ju n e 1
- 2 ---- June 1
--A-- June 28
S'" July25
Z ...... August 22
SSeptember 22
0 ":.'.''.. : .... .. October 27

> 0 ---------------
w .. : ..

1 ,. ... .


-2 I I I I i
0 20 40 60 80 100 120 140 160

Distance Seaward (m)







148 Dune Walk-Over
St. Augustine Beach: South Section
January 9
3 ------ - - - - ..... A February 24
S*-.-.. March 9
--4--- March29
'0
2 -- April20
---s0" -May 2
E--A-- June 1
S. --D-- June 28
> 1 .... .............. ........................ .... July 2 5
SW August 22
Z , September 22
.... .... October 27

. , 0L- -

- - - --- . . . - - - - - --. - .; . . . . . . . .... - - . I . . . . . . . . . . ' ... .-- - - - -- n - - - - . .. . . .



-2
I I I I I I I I I I I
0 20 40 60 80 100 120 140 160

Distance Seaward (m)







148.5 Dune Walk-Over (Outside Nourishment Area)
St. Augustine Beach: South Section
3 -* ; -- - - - - : * - : * Y " "

January 9 (estimated)
2 ..................................--A-- June 1
S---- June 28
...July 25
E August 22
....1 -- . September 22
> ... *** October 27

z
S-- --- -- .-- -----....... ...-






-2
I I I I I I 1 I i
0 20 40 60 80 100 120 140 160 180
Distance Seaward (m)







149 Dune Walk-Over (Outside Nourishment Area)
St. Augustine Beach: South Section

S-- January 9 (estimated)
S--A-- June 1
--]-- June 28
... July 25
i J August 22
E ........... ...................... .... ... ... .. .. .... S e pte m be r 2 2
%%=oo 2September 22
o 0....O ... October 27



O
0 --

-.L
-2 .....-1 .....


-2

0 20 40 60 80 100 120 140 160 180
Distance Seaward (m)










APPENDIX B







R138.7 Anastasia State Park
St Augustine 1996 Beach Nourishment Project


-- ---- --









S........


E




z
C1
0



UJ
a)


20


LI- .~ -


I I


40


60


80


100


120


140


Distance Seaward (m)


I I


160


I I I I


Jan9
----- Junl
-V- Jun29
SO-. Jul25
.. -- -- Aug22
--4 -- Sept22
........... Oct27
-- -- Dec1







i ...O... ...i... .. ....... .. .. o
s^ : : :I


............






R139 Anastasia State Park
St Augustine 1996 Beach Nourishment Project


2.0


1.5
E

01.0


z0.5
C
0

>0.0
a)
LU
-0.5


-1.0


20


40


-" Jan9
----- Junl
-9-- Jun29
S-*O' -' Jul25
---A-- Aug22
--0-- Sept22
........... ct27
--~-- Dec1
. . . . . ... . . . .


v








- 0-


60


80


100


120


140


160


Distance Seaward (m)


I I


,: . ............................................
-:-- --------



b ^'^


.............







R139.3 Anastasia State Park
St Augustine 1996 Beach Nourishment Project


- Jan9
--- -- Junl
- - Jun29
--*O-- Jul25
--A-- Aug22
--[0-- Sept22
........... Oct27
--+-- Dec1


E




z
C3

0
O


U)
w


80


100


N.....
'N1
fl


-



..
I-- l


120


1.5


1.0


0.5


0.0


140


160


Distance Seaward (m)


2.0


Q


1-.


. . . . . . .

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

M Y- --- --


N.


-0.5


-1.0


~oIz

I I


20


40


60


,


I I I I I I I


j


------------


------------


. ............. .. .... ...
--- 0


P







R139.7 Anastasia State Park

St Augustine 1996 Beach Nourishment Project


2.5


'

.
-

- \


o ....... .......


20


- - - -


,- 1.5
E



(9
z 0.5


40-
O


Ci0
-0.5


40


I I


60


80


I I


100


.. .. . .. .. . . . . . . . . . . .


I


120


140


Distance Seaward (m)


January 9
------ June 1
-YVf- June 28
- .0-" July 25
--A-- August 22
- -- September 22
...... October 27
- -- December 1


I I


-1.5


160


11ON


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








E


''''


..........







R140 -


Anastasia State Park


St Augustine 1996 Beach Nourishment Project


'~Y7\ ~~N


40


60


80


100


120


140


Distance Seaward (m)


E



O

0
C'
a)
Zi
oJ


20


160


Jan9
S------ Junl
S--- Jun29
S-. ... Ju125
..... .... ............ ......... - A ug22 ... ..........
-- -- Sept22
S........... Oct27
--+-- Dec1



. . . . . .. ... . . .. . .. . . -- -- - - - -
a i I i i
"^. ::
"''
: --
........ ^ S ..., .- .., ....-^ ..


-- .







R140.5 Anastasia State Park

St Augustine 1996 Beach Nourishment Project


L v\\ ''-


Y \ X\\
. ... . .. .* .
Y, %\,


i '
S \)'\
o *A. vN


I l -l ----


20


40


0







CD
4-a

O
=


60


80


100


120


140


160


Distance Seaward (m)


I I


r.. . . .. . . .. . . ... . .


*- January 9
-- -- June 1
-if- June 28
*-*0-- July 25
--A-- August 22
- -0-- September 22
...... October 27
- -+-- December 1


I- I-"-------I---

I ^nII


I


I


......................




......................


~'`'~''~'~'~''

a.







R141 Anastasia State Park
St Augustine 1996 Beach Nourishment Project


\\



m.1 \\


E


(3
z
C-
0
CO
u.


40


60


80


100


'- --- - - - -







j L-

4.


120


140


160


Distance Seaward (m)


S ... . .....


I^


KC


20


- January 9
------ June 1
-y.- June 28
-0-" July 25
--A-- August 22
- -'-- September 22
........ October 27
- '--- December 1












I I I


o










APPENDIX C







Mean Diameter of Sand, South Section
St Augustine 1996 Beach Nourishment


0.52


200


X


-A
:X








1145


400


---------- V -------





(
......... ...



R146A


600


.. . .. .. .. .. .. .
Native R148A




R148A


800


X

R14





L A



I



R14


E
E
Ls
a)

E
t-

(0
Co~


1000


I


0.42





0.32





0.22


1200


Distance South from R145 (m)


-HI


7A


Nc


WL=



R149


H


0.12


iter Line




i


1400


i





I


February 24 WL
A March 9 WL
March 29 WL
S April 20 WL
V May 2 WL
O June 1 WL
A June 28 WL
E July 25 WL
O August 22 WL
V September 22 WL
m October 27 WL
- I January 9 Berm
X February 24 Berm
March 29 Berm
April 20 Berm


1,







Median Diameter: South Section
St Augustine 1996 Beach Nourishment


0.6



0.5


E
E 0.4



E 0.3



0.2


X










...................
K>


A



...... .. .. .



R145


; D



R146A
i


200


R147A
I I


400


600


Native Sand









R148A -
:R148A


800


1000


February 24 WL
A March 9 WL
March 29 WL
S April 20 WL
V May 2 WL
O June 1 WL
A June 28 WL
O July 25 WL
o August 22 WL
V September 22 WL
+E October 27 WL
-*1 January 9 Berm
X Feb 24 Berm
March 29 Berm
m April 20 Berm

WL = Water Line



R149


1200


1400


Distance South from R145 (m)


I I


t I r I I I


I


X
- 0 .............








-~-----~-------
- .






Standard Deviation of Sand Size Distrubution, South
St Augustine 1996 Beach Nourishment


3.0



2.5


0
2.0

a,

1.5
CU
10


0.5



0.0


x


-- - -- - - - - -


Native Sand --...


- 45







,145


R146A


200


. . ... . . . . . . . . .


-- ---- .. .

R147A


400


600


. 1 ....... .. V .




0

R148A


800


1000


A





V


+
O





X

-K
V


WL=




R14<


120C


Section


February 24 WL
March 9 WL
March 29 WL
April 20 WL
May 2 WL
June 1 WL
June 28 WL
July 25 WL
August 22 WL
September 22 WL
October 27 WL
January 9 Berm
February 24 Berm
March 29 Berm
April 20 Berm


Water Line




1400

1400


Distance South from R145 (m)


"


-------------


...............







Comparison of Mean Diameter Along the Profile
March 29, 1996

0.36 ....... .............. .. .. .... .... R146.3: Sand Pumping in Progress
A/ R146.7: 3 Weeks After Nourishment
0.34 ---- R147: Not Yet Nourished
0 .3 2 ...................

E 0.30 ----- --
0.28

E 0.26 ....- ..Wa.te
0.26
.. 0 .2 8 -- - - ---- ------ -- -- ------ -- --------- -- - .....- .......
0.24 -

cU 0.22
2 0.20 .
0.--18 -. W water Linei- ---------

0.16 -

-110 -90 -70 -50 -30 -10 10 30
Distance Seaward from Water Line (m)











0.40
0.38
0.36
E 0.34

(0.32
c 0.30
0.28
0.26
" 0.24
0.22
4-0 0.22

E 0.20
i 0.18
0.16


Comparison of D50 Along the Profile
March 29, 1996


.. R146.3: Sand Pumping in Progress
-....... ................ .................. .. R146.7: 3 Weeks After Nourishment
--e-- R147: Not Yet Nourished






---


.......... .. ... .. .............. ........ .......... .................

S. . . . . -: i-I I.. .- - - -
-- -- - - - - - --.. . . . . ...- - - - -


- - ---- * : "-- : / -- -- --- ---- -----" -- ........... -; --- --- -\ --- -- ---:---- ----- -


. - . . . . .
_-- - - - - - - - - - - -
..I. . - - - - - I1 - - - - . . . . . . . . . . - - - -


-90 -70 -50 -30 -10 10

Distance Seaward from Water Line (m)


-110


30







Comparison of Sediment Standard Deviation Along the Profile


March 29, 1996


1.0


0.9


0.8


. 0.7

a,


0)
L0.6


c 0.5


0.4


0.3


0.2


-50


-30


-10


10


30


Distance Seaward from Water Line (m)


.. .... R146.3: Sand Pumping in Progress
- R146.7: 3 Weeks After Nourishment
---B-- R147: Not Yet Nourished


U-






I I
- - - - -




. . . . . .


.- . . . .


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














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


-110


-90


-70


i i i


. . .-


. . . .


/... .
"" ''**








I ^ ^ ^ .


-- ...

..... ....-- ---- ; -- ---- -- -- -- -- -- ------- ----- -
*II







Water Line
I


'-










APPENDIX D







Mean Diameter of Sand, Anastasia State Park
St. Augustine 1996 Beach Nourishment


0.23


100


200


- I


300


400


Distance South from R139 (m)


0.22


0.21


0.20


0.19


0.18


S* January 9 Berm
A June 1 WL
June 28 WL
S July 25 WL
V August 22 WL
o September 22 WL
A October 27 WL
E December 1 WL


0






V
Rf
I


E
E
L.

E

CO

a)
t-


Native S




















9


0.17


WL = Water


A








R140
I i I


3and --


600


Line











ll


R


500


-100


O









141....
A







Median Diameter, Anastasia State Park
St Augustine 1996 Beach Nourishment


0.24


0.23


0.22


0.21


0.20


0.19


0.18


0.17


0.16


-100


Water


0







R139
I


Line



*- - -- - --


100


* January 9 Berm -o
A June 1 WL
* June 28 WL
S July 25 WL
V August 22 WL
O September 22 WL
A October 27 WL
] December 1 WL


200


300


Native















....R 14.. .......



R140
i 1


400


500


Distance South from R139 (m)


Sand


E
E
L..


E
Ca
0


SWL=








.... -0 ......
I i


600


I I


U



.- - - - --. -. . . . .Q .




.......-.-.. ........ A .


. ... ... .. .. . .. . ..



--------~----- ~-------
R A


I I







Standard Deviation, Anastasia State Park
St. Augutine 1996 Beach Nourishment


0.7



0.6


100


Native Sand




WL = Water Line








----i~ ~~--------- - - - -- - -. .






R139
I I I


200


0- January
A June 1
June 2E
July 25
V August
O Septem
A Octobe
L Deceml


300


400


500


Distance South from R139 (m)


S9 Berm
WL U *
WL
WL
W L -- -- ...................
22 WL
ber 22 WL
r 27 WL
ber 1 WL



b e 1 W L . . . . . .. . . . . .. . . . ... . . . .





.
:. . . .- - - - - - --. . - - --- . . . : . . . . :- -- -- - - - -



- - - - - - - --- --- --** * * - - i- - -; -- - -



- - - - - - - . . . . . . . . . . .... .R i i . . . .
S i R141
I I iI ill


I


I-


............R 1 .
16




R14(


0.5



0.4



0.3


0.2


JL


-100


600




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