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H 0R IZ ONrT AL R E C EST 0ON O3F TI1-1 E- CIOAS.T:'THE i4AL.TON --SE:NSABJDAGH METHOD FOR H-URR:ICAM:E ELOISE OF- SEPT'EMBER i 9715 by J a ftes H. fla lis i L Li e Ana Lys isIResarch Sect ion Bureau of Coasta--l Data Acq~uisition Divisioni of lenaches and Shores F- orida Department of Natural Resources BEACHES AND SHORES 'TECHNICAL AND DEEIGN MEMORANDUM NO. 63--i Felaruar-y 1983 Reviewedi by M eache-:s and ShOTres Resource Center Institute of Sc ienc~e and Publ:ic: Affa irs Fl[or idca State Un iiversi tly F I[or i cia Of fi ce of Coast a 1. Manjagemen~t FI. or idca Depa r tmen t of Env i ronment al. lkeg itat i o-r Funded by A grant from -the U. S% Office L-f Co-astal Zone Managerfenti (uneri onaL[ Oceanic and Atfj-os-pheric Administraition forme r (nderthe CoastaL Zone Managemi-ent Act of i972, as amended) th r ou ghi Fl[or ida Off ice of Coas,:taL Manageme-nt GB F Lor ida Departmen-t o-f EnvIronmei-n-tall Regu [at ion- 459 ~~~~~~~~and .F56b Fl[or idca Depar tme-nt of Hirt ur iR.1i e no. 83-1 JANZi!2 FO REWOR D C ONTENTS Th 1� work presents and describes a cowputer mode I for Pagje the prediction of duno-bl~uff eros5ion due to hurricane impact. The work constitutes partial ful~lfiLment of conltracturat FOREWORD .. ....... - .... .... ob.)liga tions with the Federal. Coastal. Zone Management Program (Coasta I Zonie Management Act of '1972, as amended) INTRODUCTION .......... ........ --- ...........''" through the 1-torida Office of Coasta I Mantagement s;ubject to provisions of contract CM--37 entitled 'Engineering Support HURRICANE CONI)ITIONS AT LANDFALL ............2 Enhancetment Program' (DNR contract no. C0037) . The work is adopted as a Beaches and Shores Technical. and Design PEAI( STORM SURGE STILL WATER LEVEL ......-....2 Memorandum in accordance with provisions of Chapter 1 6r-33, F. A. C. MEASURED EROSION ............-.......4 At the time of submission for contractural. compl~liance, PREDICTED EROSION-.......- -........ 6 James 4. Eta s i [L i e was the Contract Manager, and Adim i n i strator of the Anal~ysis5/Research Section, Hal N. Dtean was Chief SPECIAL ISSUES ..................10 of the Bureau of Coastal. Data Actuisition. Deborah E. Athos was Director of the Division of Beaches and Shores, anti Forward Speed of the Hurricane at Landfal.1 .....0 Dr. E [ton J1. Gissendanner was Executive Director of the Department of Natural Resources. ShartI.Lj)e Recession as an TIndicator of Beat: &a. Coast Stabitity ............1i4 AFPLIED COASTAL ENGINEERING COMPUTER MODEL .....- -16 Discussion of rje-uired Input..... ...1i7 Results ...........-........20 Deborah E. Flack, Di rector Some Coastl Enginee i eqCniertos2 C) ~~~ C) ~Division of Beaches and Shores CLOSUREosiertins.. 28 r- Cn) REFERENCES .....-.... ....... 29 C/Di r- APPENDIX I.......-.......-.... 31 Q4~~~~~~~~~~YJ~~~~~~~~~ ~~AFPENDIX ITI................5 m ~~~~~CZ cri m C zm HIORIZONTAL RECESSION OF THE COAST: THE WALTON -- SENSABAUGH pnhidle cost of Fa (aut 0 ies west Of P METHOD FOR HURRICANE ELOISE OF SEPTEMBER 1975 City) in September, 1975. Pre-storm profiles were by surveyed in October, 1973; post-storm profi les James H. Ralsilli e were measured within 4 weeks following hurricane impact. Analysis and Research Section, Bureau of Coastal Data Acquisition, Division of Beaches and Shores, Department of Following the work of Edelman (1968, 1970) and Valianos (1975) Natural Resources, 3900 Commonwealth Elvd., Tallahassee, FL 32303. Wa Lton and Sensabaugh determined before and after average beach slopes from which a si eple geometric mass conservation model INTRtODUCTICON was derived as illustrated in Figure 1. It is desirable -that a successful beach-dune-bluff HUlRRICANE CONDITIONS AT LANDFALL horizontal recession prediction methodology is available which Schwerdt, Ho and Watlkins (1979) report that at Lancdfall considers all the factors characterizing the nearshore, beach Hurricane Eloise had the following characteristics: and coast, and possible storm and hurricane events. Whilelowing character . o ap = 1.77 inches Hg considerable work has been accomplished toward this goal, a comprehensive and successful model has not been demonstrated 2. p 28.2 inches H9 3. R = 18.0 nautical miles to exist. This is in large part due to the lack of data which 4. v = 23.0 knots quant ify water level, wave and profi Le behavior during extreme f event impact for a wide range of nearshore, beach and coastal where &p is the pressure gradient, p is the central pressure cond i t ions. 0 of the hurricane, R is radius of maximum winds, and v is the However, an importantly viable alternative is to use simplified methodology for single events, where adequate forward speed. pre- and post-storm data are available. The approach PEAK STORM SURGE STILL WATER LEVEL accomplishes two goals: 1. it attempts to provide reliable The peak storm surge Level achieved during Hurricane results for the characteristics of the extreme event should Eloise has been subject to some controversy. Chiu (1977) such an event again strike the same or a simi lar area, and reports that the U. S. Army Corps of Engineers, Mobile 2. it provides comparative information for derivation of a District, measured high water marks ranging from +12 to +16 more comprehensive model as data from more storms are feet NGVD. lsing numerical modeling techniques, the National acc uflIlu La 'ted. Weather Service estimates that the mnaximlum surge at the One such method is proposed by Wa Lton and Sensabaugh (1979) for Hurricane Eloise which struck the northwestern 2 Etay-Watton County Line was about +10.5 feet NGVD (Elurdin, '1977) 40 - Measured pro-sltom profile Work accomplished by the Florida Department of Natural. ---eooured Post -3torM PrffiIG 30 - ----~~--Predicted post-storm profile Resource,-, Division of Beaches and Shores (Dean and Ch iu, 19812) suggests that the peak surge was at about +12 feet NGVD. 20- An additional analysis is possible using the nickpoint Elevation concept used in fiuviaL geology (see Figure 1). A ,sample of (Ft NGVDj -- tr ug ee~S- 10- Str-ug ee 69 p r of 1 L es5 in W a It on Co un ty ( 1 e, represent ing the eastern Lckporl port ion of Wa Lion county, co Inc id inrg w ith rad ius of max i mu 0-.-.--.- winds for the first q~uadrant of Hurricane Eloise) intd ic a t es tha t t he elIe vatii on aof s ig9ni f Icanrvt d e flte ct ion i n 5 0 0 50 100 150 200 250 300 35 the slope of the eroded profile has an elevation of +10.36 Distance from the DUR Monument in Feet feet NGVI), with a standard deviation of 0.56 feet. Figure I. Illustration of Walton --Sensabaugh geometric constraints for Figure 2a ilkustrates that r-esults of the nickpoint analysis dune erosion. represent a randow spatial. distribution (i~e., no apparent trend with distance front the center of the hurr icane). Th e nature of the spatial distribution is further substantiated in Figure 2b which i 1lustrates a good fit to a Gaussian distribution plot. Assuming that the niclkpoint is not significantly altered as the store surge water Level recedes and any sL uwp ing is recogn ized and accounted for, then the i ckpo-.irwt analytical procedure appears to provide a reasonable weasure of the peak storea surge water level (including setup) for Hurricane Eloise, MIEASUIRED EROSION Frofi ILe data for analysis are selected to represent the radius of max iwuw wind velocity reported earLier, and linclude Walton County profi ILes frow R-37 to R-127. Because there is 4 I I I 15 * * * a , . a per iod of two years between the prof i Lt surveys, the 14 - n-69 _ possibi lity of non-representat ive profi le conditions at the Elevation 12- 0 oveoeO. 36feeI NGVD tihle of hurricane impact exists. Inspection of before and (Ft NGVD) (Ft NGVD) " -99 -Oo-I- .0, after prof i le p Lots revea Is cases where post-storm prof i le Io__ ��_ 00 m -g '3- D U . n<3 = conditions could not possibly have been caused by storm 0 o o 9- I aid dav.a0.56 feet impact (e.g., construction and fill activity), or where 8- 407 50 60 70 60 90 100 iSO 220 230processes other than onshore-offshore transport were c Learly 40 50 60 70 80 90 00. 110 i20 130 DNR Monument Number in Walton County of more importance. A total of 63 prof I les are used in the analysis, where 6 are eliminated from the visual inspection and Figure 2a. Spatial distribution of the nickpoint elevation.following impact of Hurricane Eloise. 21 are unavai lable either because the monument was not recovered or was destroyed. Dune-bluff horizontal recession resulting from Hurricane Eloise is demonstrated in Figure 3a to be random; the corresponding Gaussian plot is provided in Figure 3b. For '3 � � � . � . � . � �the coastal segment selected, the average dune-bluff n12- - _horizontal recession is 53.7 feet with a standard deviation of 12.5 feet. Nickpoint n -- Elevation Measured vdlumetric changes between surveys, again, (Ft NGVD) �10 - exhibit random behavior as illustrated in Figure 4a, closely verified by the Gaussian plot of Figure 4b. The average volure loss is -7.26 cubic yards of sand per lineal foot of 81 2 5 20 30 40 8 90 60 98 80 beach with a standard deviation of 7.16 cu yds/ft. Per Cent Frequency of Occurrence Less Than or Equal to Stated Nickpoint Elevation PREDICTED EROSION Figure 2b. Probability plot of data of.Figure 2a. Although Walton and Sensabaugh (1979) state that their method '..... was applied for a number of cases in the Florida Panhandle area and gave reasonable results .....', they did not publish supporting evidence. Such evidence is to be presented here. 6 50 40 Dune-Bluff too vero-ge 53.7 feet 30 - Horizontal 'vI o o 2Horizontal � f 20- averoge -7.26 cu. yd$/tt. Recession t - --- 0 o Measured 0 - (Feet) 5- Volumetric 0 0 0 0 DNR Monument Number in Walton County mt� 30 - Id de. 7.16 cu.o y d. /t. Figure 3a. Spatial distribution of dune-bluff horizontal recession -40- following impact of Hurricarie Eloise. .50 40 50 60 70 80 90 100 110 120 130 DNR Monument Number in Walton County Figure 4a. Spatial distribution of the measured volumetric change following impact of Hurricane Eloise. 90 . - - I '0 80- / 70 - Dune-Bluff 40 Horizontal 60- 30- Recession 20- (Feet) 50- 0 � Measured 40- Vol unletric -10 Change 0 9~( (cu yds/ft) -20 3c -30- 20 1 2 5 10 20 30405060 70 0 90 9095 98 99 1 2 5 10 20 30 40 50 60 70 80 90 95 99 99 Per Cent Frequency of Occurrence Less Than Per Cent Frequency of Occurrence Less Than or Equal to Stated Volumetric Change or Equal to Stated Recession Figure 4b. Probability plot of the data of.Figure 4b. Figure 3b. Probability plot of data of Figure 3a. 7 8 D)ue to the colp Lexity of topographic conditions, it is The average predicted volumetric loss using the Walton- not possible to assess the success of the prediction method Sensabaugh method is -7.85 cu yds/ft (a standard deviation of for Hurricane Eloise using -iuantitative mathemfatical mea�ns. only 0.31 cu yds/ft), which deviates from the measured However, qualitative assessment from visuaL inspection yields average Loss given earlier by a reasonably small value of the summarized results of Table 1. As noted in Figure I 0.69 cu yds/ft. the upland extent of the Wal ton-Sensabaugh horizontal recession is indicated as a vertical Line. In nature, however, SPECIAL ISSUES the slope of this Line is seldomr vertical. The assessment Several considerations regarding the Watton-Sensabaugh factor of Table I ,therefore, represents the absolute method for Hurricane Etoise and other reLevant issues as distance that the predicted vertical recession line mtrust' he they pertain to coastal engineering applications deserve moved horizontally to closely represent actual recession. special attention. Discussion follows. Table I. Assessment of HorizontaL Recession Predictionn Forward Speed of the Hurricane at Landcfal Using the Walton-Sensabaugh Method. --------------- .---.-------------------------......... Various investigators (Dean, 1976; van de Graaf, 1977; Goodness of Number Acc um. Assessment Dune-BLuff Recession of Per Per Factor Hughes, 1981; Hughes and Chiu, 1981; Kriebel, 1982) have Prediction Profiles Cent Cent (feet) �------------ .--�--�--�-. -.--------------- noted a relationship between storm duration upon Landfall Excellent 22 34.9 34.9 0 to 3 Good 13 20.6 55.6 3 to 6 and the extent of horizontal recession. Generally, the Moderate 22 34.9 90.5 6 to 12 Poor 6 9.5 100.0 12 to 1I Longer the storm event impacts the shore, the greater the horizontal recession. If, for comparative purposes, one assumes that the peak Results of the Walton-Sensabaugh method are provided, storm surge is approximateLy maintained for twice the radius profi e-by-profi e, in Appendix I. When reviewing plots of maximum wind, then for Hurricane ELoise the peak storm in Appendix I, the reader is rerminded that the pire-stormf surge will have impacted the panhandle coast for 1 hour and i.urvey was made 23 ,months prior to hurricane impact. Hence, 34 minutes. It is to be noted, however, that Hurricane ELoise actuaL profile cont figurat ions mlay not have been as represented had a significantly high forward speed (23 knots at Iandfa l.). by the 1973 survey, which may account for sonme of the deviation The probability plot of Figure 5 includes data for 74 Gulf between lmeasured and predicted horizontal recession. Coast hurricanes at landfall (data fromn Schwerdt, Ho and I 0 Watkins, 1979), and shows that at Landfall the median forward speed of a GuLf Coast hurricane is 10 knots. Hurricane 0 Gulf Coos! Hvrlcone (1900-1978) n 74 40 - 0 Eost Coca Hsrficot.es(1900-1978) n /7 _ Eloise exceeded the expected average forward speed by 230%; In fact, there is a 97X chance that the forward speed should Hurricane - Forward be less than the 23-knot forward speed recorded for Eloise. Speed (knoSpeed 20- If, by applying the same assumption used above, Hurricane ELoise had a wmaximum, wind radius of 18 nautical miles, but with a forward speed of 10 knots, then the peak storw surge I 2 5 l0 20 30 40 500o 70 0 90 95 98 99 would have been 3 hours and 36 minutes. Hence, for the latter Per Cent Frequency of Occurrence Less Than case one would expect more horizontaL recession. K riebeL or Equal to Stated Forward Speed (1982) notes that, in terms of the surge, Hurricane ELoise Figure 5. Probability plot of the forward speed of hurricanes for was probably not a 100-year event, but wore nearly represents the East and Gulf coasts (data from Schwerdt, Ho and Watkins, 1979). an event Lying between a 75- and 100-year occurrence; Dean (personal communications) suggests that in terris of erosion, Eloise represents about a 40-year event. How much more horizontal recession should be expected for the Latter case suggested above is not known with certainty. However, it is strongLy suggested, from studies cited earlier in this section, that peak storm surge duration and dune-bluff volumetric erosion are not Linearly related. The relationship is usually represented as exponential (Figure 6); more precise knowledge about the behavior of such curves will be possible only after the collection of more data for for a variety of storwe and hurricane i mpact intensities and coastal, conditions. 12 11 l Shorealine Recession as an Indicator of Beach and Coast Stab i ity The Bureau of Coastal Data Acquisition has one of the AV\ fMost intensive programs of profi le data acquisition in the i Cumulotive Volume Dune United States (Sensabaugh, Balsillie and Bean, 1977; Balsillie, I a ZRecession, AVe 1982a, 1982b; Pentluite, Bean and Balsillie, 1983). The profile surveying program is concentrated about two efforts. The first / ~-....-Role of Dune Recession, AVe / Al is collection of profile data represent ing norsna ly encountered - ~__. beach and coast conditions which are used to establish -Time (t)----- regulatory Coastal Construction Control Lines and, wore -Time {t)--- recently, state-wide condition surveys. Second, the Bureau Figure 6. Time dependent erosion trends (after Hughes and Chiu, 1981). surveys post-storm profi Les in accordance with the Shoreline Emergency Reaction Function (SERF) of the Division of Beaches and Shores. Regarding such data, several issues require discussion. In siwmplest coastal engineering terwinology, horizontal recession tmay be regarded as either short-termf or long-term. Short-terma horiiontal recession results frow, storm or hurricane impact; long-term horizontal recession occurs as the result of refraction-related longshore and onshore-offshore transport processes and because of eustatic sea Level rise. Now, while for the detertmination of tong-terfm recession rates the position of the shoreline is often used, one must be very careful when using post-storm, information as comparative data. The reason is straightforward: storm.s frequently cause a seaward shift in the shoreline location due to dune-bluff erosion. The seaward shift is quite obvious for Hurricane Eloise. Figure 7a illustrates the 13 14 random spatial distribution of the shift for the study aW 2I sid. day.= 40.1 feet area; Figure 7b provides the probability plot. Eloise seaward a overaoe' + 24.4 etat resulted in an average seaward shift of the shoreline of 100-o o : �P --- O - -o - --a-e-0--'-- 24.4 feet, with a high standard deviation of 40.1 feet. U) o -- - - ----- --- --- ...... .. _ V -G-- 0- - The rather large amount of scatter in the data may be due to Llandward-loo - the 23-month period between surveys, but the results 40 50 60 7 0 so 90 00 10 120 130 never-the-less demonstrate that one must be careful when DNR Monument Number in Walton County using post-storm profi les to determine long-term recession Figure 7a. Spatial distribution of the shoreline shift following impact of rates where the shoreline is the reference contour. Hurricane Eloise. When considering erosion of the beach (i.e., note that this model is primarily for horizontal recession of the coast), one must recognize that vertical recession (i.e., scour) of the inundated portion of the profi le wi iL be greater cluring than following storem impact, due to post--store recovery. The WANDS 150 computer model accounts, to some extent, for post-storm recovery (i.e., 3 to 4 weeks following impact), but does not 100- s L seaward allow for prediction of scour. 50- APPLIED COASTAL ENGINEERING COMPUTER MODEL a, o- _snl The Walton-Sensabausgh (WANDS) method for prediction of ' landward -50 dune-bluff horizontal recession result ing from a Hurricane o Eloise type event has been programmed to support the coastal - t00 l 2 5 10 20 3040506070 80 90 95 9899 engineering needs and responsibilities of the Division of Per Cent Frequency of .Occurrence Less Than or Equal to Stated Shoreline Shift Beaches and Shores. Computer programs in support of the task are written in AFL (i.e., A Programrming Language) and Figure 7b. Probability plot of data of Figure 7a. supported by the Natural Resources Management Systems and Services data center's IBM 4341 Model Group II processor. APL programs written by the author for dune-bluff recession prediction are listed in Appendix II. . 15 1X~~~~~~~~~~~~~~ (WIa Lion --- Sensabaurh Miethod) ii)RliAT' INPUTIf FORM Disrunion Of Requiried Input Data requtired for the WANDS computer model. are Listed OF S HM( E PROMFIA-C, I NF-ORM AT r1ON onl the data input form of Figure ft. Somre cli sulssion- of the E x pon Ient: Sca le Farctor [--5Y Survey Date *.LL.- .data is necessary. t moy ONSHOREE PROFILE IDAiFA Offshore profiLe ii-iformat ion may be obtained from the u... st (lata from1) the sho 11 L i II I I up anIId Dist E tov R iSt ELev 1)i :1 E Lev Beache~s and Shores Technica l and Design Memorandum No. (ft) (fl (fL) ( ft ft)4 (ft 82-4-11 (Efatsil~Lie, ilBlb). If not yet availLable La, NI DMV I 0 0- 11 Zs4,S ~ tzi,2 ~1 programming has been deve Loped to determine exponent 2 -.44 12 9-i~~ 47 22 i h f f i i t d t f f i i t~~~ ~ ~ ~ ~ zs 43 -7 13 2N 215.f 23 __ 4 s&$2 ....i1 .. .. ruirin as ipt d istne mesrd fro t he o L l.y 5 1.0-7 16 2___ 6- If i s t II q s h a r e ~~~~~~~~~7 yj.5, L 17 27 9 25 k, 19 29 corresponding number of depth va lues as- discussedl in i ( P .24.. 20 30 Beaches and Shares Technica l and Design Memorandum No, survey Date./, 175 Prof i Le Type: 82-1-:( (Baf5itiie. i982a). Distance-depth data pairs d ie)y shou Ld be entered at a constant spac ing of not greater than -CTOINRMIN i) NR R ef M ooI: .2--!P Coaunt..I y Name: 50 feet. ----- - Terfaina L input of onshore prof i le data is required since Deg is 5 -tane range is Located (4'./or M . (e9 145 ft wethfsec ri f is edre oo)t pre- and post-construction profiLe data subitmitted with, for 145 1 )I Di stance from. yhlorei ol3t CL 3 instance a permit appLication, wiLL invariably not be tnlaCt, Coi~c i dent with DNR reference mtonuiment [orations at-d, therefore DIITAV:11-(1Jf)].tj with DNR profi les. 'Profi Le Type' includes either a pre- or F i L.e I.0. 1) .sport l Lo ee post -ronst rtic t i on d esc ri p tor ( i e. e, enteprod a s 'Pre-Const *or frIptDt 'Post-Con-5t , or soe other Pert inent descr iption). S to()rm(I Surce R..e turn I C ( oI rc e Deot e rm(aina tio oiI)af 'D is t a Ic r ange i s fl-nilm til e R ef M ao' i s E I vva tio ao oct -I t he a I.onrkg!tio ar e dti rIc t i cmI anIId dis t anIc e t he r angeq ( i . F,, thife N V D Year5 pr-o f i I e foar w h i ciih thI e finto L)d is!- to- b e a pp ie-d ) isv fr-om the C nearest Di4R rnference ei-noument (F igllre 9). Ranges jsho Lit 4 ---. . ..-.- -.-.�.. ....... . b e s e I. ec t ed A ,s shoare -IIoar IIa L p ro0f i L e . The, comfpas di rect i ion Figure 8. Required input data and data input form. 17 ia indicator (i.e., N = north, S = south, E = east, W = west, Selected Profile . etc.) will, generally, be N or S for the east and lower Gulf Locolion is given sLocaion given W145 coasts and E or W for the panhandle coast. The use of more as W145 specific compass direction Indicators, such as NE for I Upland R-1 , 145fl. -[ northeast, are encouraged, CC CL Tn -n many cases onshore topograph ical Informat ion wi II be R-100 _I13Jf e ava i lab le only to the mean h igh water l ine (Mi-IWL). There will be a need, therefore, to determine the addtional distance from Dune Line the MHWL to the shoreline (i.e, 0 NGVD), in order to obtain Beach the 'Distance from Shoreline to CCCL- (i .e, CCCL is the Coastal Construction Control Line). The foreshore slope can be used to determine the additional distance, since the berm crest is a Offshore wreasure of the MHWL. Table 2 lists foreshore slope data compi led for the Florida panhandle coast. Characteristic Figure 9. Example of determination of "Distance Range is from Ref Mon" (see foreshore slope information for other coasts wi Ill need to be Figure 8). compiled from existing studies and published literature. Other required data on the form would appear to be straightforward.' Results Four output formats are available from the dune-bluff hor i zontal recession computer model. Figure 10 illustrates the format of the plotted results where the solid line represents the pre-recession profile, the dashed line depicts the eroded profile, and the dash-dot-dash line is the storim surge still water level. The horizontal scale Is set at 1 inch = 50 feet, the vertical scale at i inch = 10 feet. Plots are formiatted to provide a 20 19 IN) < - .0, en 0oooc Table 2. Foreshore Slope Statistics for Florida Panhandle Coast.1 vrg I 1969 1970 otl Station C ttstb~Mnhy_ Sept. Oct. Nov. DecI Jan. Feb. ,far. Apr. May Jun. Joly Aug. Mean V) St. A dre.-s Mean For-nhor. Slope 8.7 6.0 6.4 5.9 5.0 8.4 4.9 S.3 5.1 5.4 7.0 6.9 7.0 0 State Park Std. Deviation, 3.95 2.08 2.54 2.01 2.01 1.23 1.92 1.6S 1.01 2.951 .56 1.16 M CD No. Obsorvations 2S 30 2S 20 29 26 17 17 21 is 27 30 i Groyton eoo Faroshore Slope 11.8 8.1 7.5 7.S 8.0 6.0 3.0 5.0 7.1 6.7 7.0 7.0 7.2 State Park 01t1, Deviation 5 .69 2.30 2.27 1.60 1.43 I.S6 1,10 1.52 3.08 2.28 2.54 1.63 -h II No. Observations .-26 30 28 29 31 28 30 28 30 27 28 27 -I - (D Crystal 140a0 Foroshoro Slope 7.6 0.0 7.6 8.8 8.4 7.2 5.8 8.3 8.7 8.5 0.1 9.1 8.1 a B ...h Std. Deviation 3.15 3,61 2.45 3,52 2.80 3.31 2.54 2.27 2.67 3,23 1.88 2.70 1 No. Observations 30 29 27 20 30 26 29 30 31 20 21 160 J.C. 0,051CC Moan Poreshoro Slope 7.8 7.0 4.2 4.6 2.6 2.7 12.1 10.0 11.8 12.9 Stat e P ark Std. Deviation - .22 2.78 2.5 9 3.41 2.10 1.96 ---- 3.70 2.89 3.40 2.89 a No. Observatio n s -- 29 21 20 25 24 21 25 30 28 31 Navarre Mano PForeshore Slop ---- 10.7 9.7 8.0 10.3 9.4 9.0 9.3 10.5 6.3 9.3 9.0 9.3 Btah 54td. Deviation - --- 3.50 4.40 4.13 2.57 2.80 4.02 3.78 3.79 2.3. 4.47 3.94 No. Observations -- 12 20 22 2 6 19 24 30 30 28 28 31 0 Fort Piokes Moano orshor. Slope 9.0 1 0.3---------- - - - ---9.8 10.9 11.4 10.9 10.8 11. 7 10.6 State Park Std. Deviation 2.6 4 4.44 --2.80 3.66 4.66 3.25 2.79 3.37 o-i No.0bser- -tionm 25 12�30 2-4 29 30 31 31 Reportedi in degrees.- Data from Balsillie (197 5) VD �-~ ~ ~ ~~ ~~~~~~~~~~.- m~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~CY 0 j I~~~~~~~~~~ Beach Std.Deviorion 3.15 3.61215 3.52 280 3.31 254 2.27 2.7 J.ZJ 1.0 / I -m -.. 1bservntionl 00 29 27 28 50 26 29 30 31 30 51 16 f 1 ~~~~~~~~~~~~IC 2~~~~~~~~~~~~~~~~~~~~~~~~~~ U) Srare Prk Std Ocviaion --- 3.22 .78 2.9 3.41 .1(1 196 --- 3.70 289 1 I . I No. Obscrv~~~~~ricn~~~ -- 29 21 25 25 23 21 -- 25 30 28 51 ~ ~ ~ ~ ~ ~ ~ I - Navarre ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~~~~1 .ea -0.0r lp -- 0797851.59490951. 639390 93r J ~ ~~~~~~~~~~~~~ 1 1~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~N 0 ID~~~~~~~~~~~~~~~~~~~~~~I' r,~~~~f.N - I '' 21 1/~~~~~~~ FLORIDA DEPARTMENT OF NATURAL RESOURCES DIVISION OF BEACHES AND SHORES worksheet on which project dimensions and elevations, and BUREAU OF COASTAL DATA ACQUISITION DUNE-BLUFF RECESSION PREDICTION engineering assessments May be drafted. Additi ona p ots (WaLton -- Sensabaugh Method) are automati caLLy generated shou ld more' than one p Lot be ADMINISTRATIVE INFORMATION required to adequately represent a given range. F i Le Number . ..... ........ .......................... Test Responsible for Data Input .............. James H. Balsillie Pertinent input and administrative information and Initials ................................ Date Job Compteted (mo/da/yr) , ... _ ..............2 2 19132 horizontal recession results are printed in standard format ---------------_ _----------------------- (including a key to the plots) as i llustrated by Figure 11. INPF'U INFORMATION Certain terms appearing on Figure 11 which may be ambiguous, A. OFFSHORE PROFILE DATA Exponent (i.e., Shape Coefficient) ......... ......6667 are defined in Figure 12. Scale Coefficient ..........1..................i54 Date of Frofite Survey ......1.... ...1 73 Entered onshore profi te data are Listed by a third B. ONSHORE PROFILE SURVEY report (Figure 13), and are referenced to both the shoreline Date of Profi le Survey ............................11 75 Profi Le Type . e........................ Pre--Const and the CCCL. C. STORM SURGE DATA Where offshore power curve fit data are not yet Storm Surge ELevation (ft NGVD) ....................36 Storm Surge Return Period (years) ....0 .............. avai Lab e from Beaches and Shores Technical and Design Source of Inforwation ...........no..... ....JHB Memorandum No. 82-1-II (Batsi ttie, 1982b), one may enter D. DNR REFERENCE MONUMENT INFORMATION DNR Reference Monument I.D ...............R-123 appropriate data from which the results of Figure 14 are County ......................................WaLton Range to Mon Distance (ft) ........ produced as a fourth report. CCCL to Shoreline Distance (ft) ................8134.8 --------------------------------------------------------------- Some Coastal Engineering Considerations PREDICTED F:ESULTS FOR HORIZONTAL DUNE-BLUFF RECESSION AppLication of the WANDS model requires the Erosion Distance Measured from the ShoreLine (ft) . .... 23.3 Erosion Distance Measured from the CCCL (ft) ......11.5 consideration of two issues: i. the model is calibrated to Angle of Eroded Surface (tangent) . ...... 0.06289 provide average dune-b Luff recession va ues, and 2. wh i le the Angle of Eroded Surface (degrees) ..................3.603 storm surge Level of Hurricane Eloise approaches Volume of Sand Deposited Offshore (cu yds/ft) ...... 8.662 VoLume of Sand Eroded from Upland (cu yds/ft) . ....8.85 that of the 100-year event, the amount of d:lne-bluff Offshore Profi Le Closeout Distance (ft) ..............1 recession does not. Due to the significantly high Offshore Profi le Closeout Depth (ft NGVD) ............5. forward speed of Eloise, dune-b uff recession was probhably KEY TO THE PLOT(S): Solid Line -- Surveyed P:rofi Le [oes than is to be expected fromn a L'tower average forward Dashed Line -- Eroded Profi Le (Predicted) Dash-dot-dash Line --- Storm Surge Water Level sp eecl . Figure 11. WANDS dune-bluff recession results: the data listing. 23 24 *10 0 It Iran 0-13I ONSHORE FROFILE SUrRVEY DATA E UopI Sara Data: v a County: WaLton Ferot i t I D.0. Test 10 Profite Location: 0 ft from R-123 e Profi Le Survey Date (da/oto/yr): il 75 Distance Distance Elevation i20 - racascionUp Land froot o ~ dkt.snca stalin ouraje frot -the CCCL Shore Line F- - - - - - ---------- - (feet) (feet) (feet NGVD) to clot-ut dlstancl ---I asia ~~~~~~~~ -* coona oda~~~~~~~~~~~~~~~~~e .00 ~~~~~~134,80 .00 34.80 _100.00 3.44 our race- 72.131') 162.00 5.77 G O -Z~i~"n~E~i-~-~ 76.80 -513O8 10.39 v 84.00 -50.O0 10.76 dapth 110,80 i24.00 20,79 134.80 .00 22.01 200 -too 0 t 000 3 0 0 1A5.00 11I00 26.02 150.80 16.00 26.28 Distance from tha CCCL in Feet 155.80 21,00 24.42 184.80 50.00 22.11 234.80 100,00 21.97 Figure 12. Definition Sketch. 287.00 153.00 21.52 NOTE: -ye distances denote Locations upland of the CCCL. Figure 13. WANDS dune-bluff recession results: onshore profile survey data. 25 25 In terfas Of coastal engineeoring applications, the first ENTER OFFSHDRE DISTANCES: Issue is straightforward. Average dunie-bluff recession 50 100 150 200 250 300 350 400 450 500 550 600 Occurring In the region of radius of wax imum wit-ds of Eloise 650 700 750 1300 850 900 950 1000 1050 1100 1150 1200 ENTER CORRESPONDING ELEVATIONS AN +VE VALUES: was 53.7 feet with a standard deviation of 12.5 feet. 2.03 6 3.232 4,235 5.13 5.953 6.722 7.45 8~143 Figure 3a illustrates that about 80% of the measured recession 8.808 9.449 18.07 10.67 11.26 11,83 12.38 12.93 13.46 13.98 14.5 i5 15.5 1 5.98 16.46 16.94 values are within + one standard deviation of the average. The coastal engineer, therefore, way find it prudent to CoUntY - ------- Ref Mon I.D.- --- Survey Date consider sorrie additional recession depending on local EYPDNENT EXPONrENT FIYE.D AT 2k/3 condIt ions and proposed design constraints. N 6T,-Y FID--- D IRECT LOCARITFIMIC The second issue is wore difficult to assess, since METHOID MIETHOD there are present ly no wethods ava ilab le by which to Scale Coefficient; 0.15 0.15 0.15 Exponent: 0.6667 0.~6667 0.6667 deterwine the additional awount of expected recession. Correlation Coefficient: 0.9939 0.9939 0.9939 RMS Errcrr: i.327E--3 7.603E1i5 5.174F-15 Again, however, the coastal engineer efight consider ane additional amount of recession which, based on overall Project conditions, wou Id appear prudent to inc lude. Figure 14. WANDS dune-bluff recession results. offshore power curve values. CLOSURE The Walton - Senisabaugh wethod for the prediction of dune-btuff horizontal recession due to the impact of a Hurricane Eloise type event has been assessed, based on data measured within the region of impact (i.e., first %Uadrant of the hurr icane. The WANDS computer model should be app lied on the basis of this assesswent. The computer approach now allows for the prediction of dune-bluff horizontal recession in a watter of emintes, rather than the hours previously req~uired usinig graphical and interpretivye tr i a -and-error proceduores, ACKtNDOWLEDCGMENT S Draft inrg of riany of the figures in this report was accoep)Lished by L. J. Peyiquitp. 27 28 REFERENCES Kriebel, D. l.., 19E2, Dune and beach response to hurricanes: M. S. Thesis, Civil Engineering Department, University Balsi tlle, J. H., 1975, Analysis and interpretation of littoral of Delaware. environment observation (LEO) and profi Le data along the western panhandle coast of Florida: U. S. Army, CoastaL Pen-tuite, L_ J., Dean, H. N., and Balsi I ie, .. H., 19B3, Engi neerilng Research Center, Technical Meemorandum No. 49, Florida coastal profi te Location maps: Florida 104 P. Departcment of Natural Resources, Divsion of Beaches and Shores, Beaches and Shores Technical and Design Balsi LLie, J. H., 1982a, Offshore profile description using Memorandum No. 83-2, 30 p. the power curve fit, Part I: explanation and discussion: Beaches and Shores Technical and Design Memorancldum No. Schwerdt, R. W., ilo, F. P., and Watltins, R. R., 1979, 82-1-I, Florida Department of Natural Resources, 23 p. Meteorological criteria for standard project hurricane and probable maximum hurricane windfields, Gulf and Balsi Ltie, J. H., 1982b, Offshore profi Le descrription using East coasts of the United States: National Weather the power curve fit, Part II: standard FLorida offshore Service, U. S. Department of Comimerce, National Oceanic profi Le tables: Beaches and Shores Technical and Design and Atmospheric Administration, Technical Report NWS 23. Memorandum No. 132--I-II, Florida Departsment of Natural Resources. Sensabaugh, W. M., Balsillie, J. H., and Bean, H. N., i977, A progrars of coastal data acquisition: Coastal Burdin, W. W., 1977, Surge effects from Hurricane ELoise: Sediments 77, A. S. C. E., p. 1073-10E5. Shore and Beach, v. 45, no. 2. Vallianos, L., 1975, Beach fill planning - Brunswick County, Chiu, T. Y., 1977, Beach and dune response to Hurricane Eloise North Carolina: Proceedings of the 11th Conference on of September 1975: Coastal Sediments '77, ASCE, Coasta Engne ng, ASCE. p. 116-134. van de Graaf, J., 1977, Dune erosion during a storm surge: Dean, R. G., 1976, Beach erosion: causes, processes; and Coastal Ensineering, v. 1, p. 99-134. refnedia measures: CRC Reviews in Environmental Control, CRC Press, Inc., v. 6, issue 3. Walton, T. L., Jr., and Sensabaugh, W. M., 1979, Seawall design on the open coast: Florida Sea Grant Report Dean, R. G., and Chiu, T, Y., 1982, Walton County storm surge No. 29, 24 p. model study: Florida Department of Natural Resources, Division of Beaches and Shores, 64 p. Edelman, T., 19t68, Dune erosion during stortm conditions: Proceedings of the 11th Conferenrce on Coastal Engineering, ASCE, v. 1, chap. 46, p. 719. Ede Iman, T., 1972, Dune erosion dur ing storm condi ti ions: Proceed inns of the .13th CoastaL oEngineeri ni Conference, ASCE, v. 2, chap. 70, p. 1305-1311. Hughes, S. A., 1901 , Beach and dune erosion during severe storms: Ph.D. Dissertation, Coastal and Oceanographic Engineerlng Department, Ilnversity of FLorida, Gainsevi LLe. Hughes, S. A., and Chiu, T. Y., 1981, Beach and dune erosion during severe storlms: Coastal and Oceanographic Engineering Department, University of Florida, Faineevi lLe, (funded by the FLorida Department of NatulraL Rrsotrrces, Division of Beaches anrld Shores, and Fl.nrida Sa (l;ranl' Program,). 30 29 aot on County E R- 3 30 APPENDIX I wa Iton County Prof i Le P Lot! ;epreeenlt ino the Rad i iu of I O~~~~~~~~~~~~~~ Maxiotmuni ind Speed for Hurricane ELoise, Sept. 1975 F Key to the Plots: Pre--StortI Survey (Oct. 1973) - z-.... I V -too too 200 0.0. 400 Post-Storti Survey (0tu. 1975) Storei Surge Still Water Level (10.36 Ft NGVD) 40 Predicted Dune-BLuff Erosion Profile a tan Ca nty E R~~~~~~~~~~~~-38 8 I 30 N ~~~~~~~~~~~~~~~~~~~~~~~~~40 - Walton County 30 -R~9 3 20~~~~~~~~~~~~~~~~~~~~~~~~~ 0 0 F 1 O *~otto 0 0~ ~~1 i 0Distance fron the 04R mnnument in Feet 40 40 - aalton Ct on Countylo n Couny E R-40 E R-43 30 30 - 3 0 V v F I F C0. -I- I I ,-, II vo -10 cl 200 400 V -0 0 t 1 00 3 400 40 _ Wa1ton County E R-41 4laton CouOty e E R-44 G I '30 4 40 R 4 20 It- ei \3 I I I " I , I 40~~~~~~~~~~~~~~~~~10 0�lo0 D i a nc flon th NR oi u Count y . n40 e IOsr~ncD fro, Zhe DNR onInuena in nt Fe Distance fro0 the DNR Monument in Feet qO~~~~~~~~~~~~~~~~~~~~~~~~~4 a0Otoo County Oa I to County n 0-52 E R - 52 I 0~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 0-40 30 V~~~~~~~~~~~~~~~~~~~~~~~~~~~~ F ~.----------........................ --------- ---------- - -- ----------- - --- ................... ............................................... I 0 '0--. I I 0-100 0 ...................~~~~~~~~~~~~~~~~~~~~~ 10 20... .... 40a 4 0 OuaIt aon Coau nty OatI ton Coo n t R -534 O~~~~~~~~~~~~~~~~~~~~~~~~~ 0-43 3 0- 3 0 .-<-~..::-~ ........................................................---------.----------......................... -tO0 ~ ~ ~ ~~~~~~~ ~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ( I0 40 0 I n .0 20 rlon u nty O I~~~~~~~~~~~~~~~~~~~~~~~~~~~3 i~~~~~ H nI --, V---~ -0 0 n-ton~~~~( toI0o0--. 400 o t00 C tOO 200 --iO.0 ~~~~~~~~ 400 0 40 4- on toh County Uot ton County E R-54 O 0~~~~~ ~ ~~~~~~-St1 3 e. e ~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 30 2- T to~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ U..... I ~~~~~~~~~~~~~~ I t V-too c 00 200 --4tt. 400~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~'~... o~~~~~~, 100 tOO 20-.4000 -10 -- Oltotnce Irom the 0140 Nonunnot to Feet Olotuice Iron Ice .qf '09 nuflfiO r nt in eetI no~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Io ICountyIIt 20~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ -it~~~~~~~~~~~~~~~~~ I20 aItaI H~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ .- 6 It 0~~~~~~~~~ ~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ -....... . .~ 0 o 4O 0 0h.. 00 40~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ - 40 - ~ L0IT0 Itn CountyI ItWat Iton CounIty nt E~~~~~~~~~~~~~~~~~~~~~ 0-5 E 0-6 30~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ o~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ e 2'0~~~~ ~ ~~~~~~~~~~~~~~~~~~~~~ - I 20 - n~~~~~~~~~~~~ I In0I IcefromIheDNRManumeI I0 ton County a0 �-62 n Walton County R-6n R __ E R-67 20 T 2, n ........................................ . ........................... ....... FI -' IiI I;�-4 40v~~~~~~~~~~~~~~~~~~~~~~ - 04 -t100 o 100 2-*30400 v-to 0o -.-......40 Ualton County 40 2 02R-63 Uelton County e R-74 D 40 40 on C 0 6. R E R-7 / - o - - o10 C too 200 vI0t0 400 10'. ,'0 . ~~~~~~~~~~~~~~~~~~~10 40 - ualton County � Ral ton County E R-75 30 e 30 -- n t -. Distance fron the D0R Monument in Feet Distnce froa the D00 tonument in Feet 40 - Wdlton County Ualton County E R-84 I~~~~~~Wlo onYE 8 20 ,0 4 -O - 4 tt ................... .... ............. - F30 v, ............... ----I - ZO- ................................................... F _-- - ~ 1O _ < ; G V G I o i>>.- , I , I V ~1OO 100 0 I , V -100 100 200 400 R-88 ! v1 0 o e DR n F 0 istance to, t h e DIIR- n 2n0 in Fee t o 0 O-3-O.0. 20- 400 0 - \ 30 to *-v*-.--i t10 140 lion County 40 E R-?9 Oulton County E R-76 30- 04 3 V G~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 6 ~ ~ ~ ~ ~ ~ ~ 04 O t00 C 100 2OZ 0.... 400 0 o T~- V too C 100 200 0*~: B�.-.. 400 40 - 40 Uat ton County U aIton County E R~~~~~~~~~~~~~~~~~-SO E 5-27 30 - 30 e~~~~~~~~~~~~~~~~~~~~~ 0 0 2 0 n . - -....... F ........ . N~~~~~~~~~~~~~~~~-: ------ O~~~~~~~~~~~~~~ ~ ~~~~~~~~~~~~~~~~~~~~ 10 C -ZO 4000 0 40 O i I 0 au Iton County O saton County E s-Si E 02-75 30 - 30 -3 202 0~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ I F _~_~~~~____ ~ _lt~.~._...... ~-._~__F Y . N - --,, ---- N v -too tOO ZOO 3~-- -0.~ 400 V IO~ C 100 20 "--o~o,. 400 o 0 Distonce ton, tho SONR tonument in Feet Distunce from the DOR Itanutent 0n FNet 40 40 - H I tOhl Count Ity alton County R-12 R- I06 3 I 20 3 20 -- o 'x~~~~~~~~~~~~~~~~~~~~~~~~~ t ~ ~~~~~ 10 ............~~~~~~~~~~~~ .............................................................. ..........................-----------------------------.............. U"~ .... .. . H ~~~~~~~~~~~~~~~~~~I 0 -, O~~~~~~~~~~~~~~~~~~~ 0nCna~ 40 -- 40 -- Uol ton County oton out R-It3 o ~~~~~~~~~~~~~~~~~~~~~~~~~~~e V ~~~~~~~~~~~~~~I V F~~~~ - ! 0 . . ... aI -t00 C t00 400too-200 (otO0 2 400 4'0 -~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Jot ton County o Utnttoo COunty � ~~~~~~~~~~~~~~~~~~~~v R-li �20 0 o ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ix ,~~~~~~~2 . I V-tOO Ctoo 20 -.... . .. 400 V v u ..... 0~~~~~~~~~~~~~~~~~~~~~ -[0 t10t0 200 -~-400 -10 ---o Diotonco Irom toe 000 ttonuiont In FeetDi s ta nce Iroe the 0f10 Monument in Feet 40 Q ot an County Uo I I On Caunty E R -I 01 I0E R- 930 e 3 v~~~~~~~~~ F 2 F O2 ---- .--.---' 0 I ..* .1 10 tOO------ 20 --'40400 -3I 0 D-0 �- V0 100 C 0 O 4 0~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 40 - 40- Walton County Wdlton County 0 0R-102 0 R-06 30 - I 2- V~~~~~~ 0 0 n 0 t I 0 I 0 N N v I O.4 I 0 0 v 0 0 D D~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ O 0~~1 40 4~~~~~~~~~~~~~~~~~~~0 Walton County Waton County E 0-105� -0 E R It0 0 n L n ! G- F � �tIt o ~ ~ r -- N v I o o 0 00v I 0 I 4 0 aV a Ir - to 0 20 ?I. 4 n u tOi 200 a -n.r 400 0 - ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~~~~~1 0istao~I~ h 0 o~oti 1e I nce I ron the tDlt Oontinnt in Foel t.~~~~~~~~~~ I 1 40 -- � 0~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 0-0 0- U a~~ ~ ~ ~~~~~~~~~~~~~~~~~~. I toon C ouuntty R-qO~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ I 6 -~ ~~~~~~~~~~~~~~~~~~~ 30 I e v 22 ...............-------.--.-------- ..................-.--------------------.--------.-----.----------------.--------.-----.-------------o '~~~~ ~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ U0 C 10 ..... 0 0~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~~~~~~~~~~~0 4O ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~-- I I 10- 9 3 - .................... T ...........................................................t ...................--"---"------.................................... ------------------- ............ . ... I0 o~~~~4 0 40 - n c a f r o m T 0 0 a n u I e f) f 1 n F d ft c E f r 0 a t h o n u m e n t I n F e 2 I 20 e V~~~~~~~t -- 14~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~0 -- ~ 40 - ~~~~~~~~~~~~~~~~~~~~~~~~~~~Jltton County Out ton County ER t 30 --e i~~~~t I *~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~"C I 0 .--I.... ~~~~oo ~~~00 200 to o --" 0 400 0~~0 -to ~~~~~~~~~~~~~~~~~~~~~~-to -- Oslonce Iron the 0140 nonuoerit in FeetDilslunce from th~e @00 Ionnuenl In Feet ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~40 40 - ~~~~~~~~~~~~~~~~~~40- Luti n County 0-I E O~~~~~~~~~~~~~~~~~Ut~ ton County R-II2 .......... --------------- .... ---------------- 20~~ ~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ i 2 -- F ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~~~~~~~~~~~~3 -- a u n t y U I t C o u n t .......................... .. . ........... , ._.---_ ......... ................... - -................................................ 40 ' u aIton Coaty Ut nton County O ~~~~~~~~~~~~R-tZO E R- t23 30 -- 30 -- o ~~~~~~~~~~~~~~~~~~~~~~~~~e 20 I 2 n . it F to - G I I t r~~0 I I0o o 0 N .... ,0{ , I 0 4 0 40 -- OtonCounty. Ouatton County 20 -- � to -- o .-~-'IF7.~ C ~ ~ ~ ~ ~~ ''- ''' 'O 100.. O 0~~~~~~~~~~~~~~~~~~~~~~~~~~~ -tO - -I0 Distan~e Iron, the 001R Monument in Feet Di s tunce from the 000 Mtnlouoent to Feet IS EROSION HOW Th is WORI(SFACE provides for dune-b Luff horizontal. recess Hon using the method developed by WalIton and Sensabaugjh (1979) for APPENDIX II ~~~~~~Hurr icane Eloise which struck the panhandle coast of Florida in September 1979. Foltowing is a description of how to use the workspace: APL Programs i.Operate in tile workspace using the fuIll screen siessions for wanager ( i e. SMAPL ) Dune-DLuff Recession 2. 'Type onto -the screen__NLT .....NPT . and enter the requested data. Then wait uint il the p tot appears on the screen or the ilessaue. ... .MORE ..... appears at-l the lower r ight hand corn-er of the screen (MORE i nd ica tes that you tiust p age -the screen). 3. Naaes your plots with a uniq~ue label when asked. 4. Use the Full Screen Mode (i~e., PF2 key and COPY ON ID fi Lename) to get, fi1Le cop ies of the reports. 5. Report nawes are TABLEi * ONSHORE and SHAPE.. TADLE~iL Iists; -the resu Its basic resu Its of the recessioin model I 4OSHORE i sts the onshore prof i le data tha t your prov ided , and SHAPE g i yes the offshore pi-of i le c urve coeff icvients where not yet ava i Lab Ic frori Beaches and Shores Techn i ca l and Desi gn Mewoiran-duw No. 02-1 -11 (provided you have the oiffshore data to enter). L. Ex it the workspace ( i.e., enter the CMS env iroi-went) and invoke either toe GPRINT or ADMOPUJV modulIe commands (folI owed by the f i enafwes -that you provided). )FNS AND ANNX ANNY AVG AXES AXIS AXE A3D) BY CITE C G W RT CHA(RT CHECKNAME CHIA CLEAR CLIP CL.OSE CL0SEGP CNS COIBN COLOR CONTOUR COPY COPYID COPYN CORN CSINIT DECOMMENT DRAW ENCODE ERASE ERF FTILL FILL.ENCODE FIT FITFIJN FITF0 FIXVP FIAT FRAME FREQ FRME FSSAVE FSSHOW FTCF G EP GRFEIELD HCHART HIDE IHOR INDEVO INDEVi INDEV3 INPUT INTERPOL-ATE INTERSECT IONS INTO ISONETR]:C LABEL LDLX L.OLIY LINEAR LOADSSAUX LOADSEWS LOG LI)GLOG LOG9 MAGNIFY MEMBER MODE MEG NEWPROF OBDLANI(S OfjLIIQUE OF ONSHORE OPEN OPE NGI- OUlI UT PERSPECTI VE P IECHART PI ELADEL P IELAD! PLO FLF PLO1 ` 0TT 1 POL I-Y POWER PR-EF`AR:SE FIRCFILEI PUT PUJT F I I F I -. A D RESTORE RESUL.TS RETICLE IROT ATE RSL.TS SAXES EAXISX SAXISY SAYIE IS IAt C SCIESSOR1 SCRA TCIAH SA E S1IIRFSM SKETCH EL SLAB-EL SLBLX Sl...W.Y g.L itZ gm SE 1FI EI-D SPL_ 9"U PLINE iO T SE STEP STEREO STI ItII E TYIL E SURFACE SURGE, SIJHV11 SXFM aso THRFE E VI E W 9T TITE T T ri ,II4L.ATE TIRAVERSE TYPE LINE USING VCAT V ER V IIF W V (I WPO R T vhi; VS WAND)S WANDS2 WIDTH- W ITH IWROG11) WR]I'' E WITC ESS W3D XB[LANK.S XIII iEL.0T FIUINIT iPtNS 11 O F,'E.ATFIVE S"FEI-1 [39] 'Enter Fi Le Numebr )VARS [41] 'FulL naftle of the eng ineer responlsib le -for the input data: A AA A (4A AD AE ALPHA ALPHANUM AP APLFVSS [42] NAME*-D APLI Issc AP1_21SSC ASPEC Al 2 A2 El DIB BSPEC C431 SURGE C co CEPEC CTLSM C TL~ C6 DATS DI1ST DNR E [EXP FFF FILE FULLPATA FUJLLPATC FULLPATG GDDMCODE GDDMENT HOW I IN INC LAIIA LANDe LADC L.ADD LADE LADJF 1.AEIG LA8H LNX LNY N NAME NELJX 9SURGE[0]V INEWY NUM OFF D AT E oNDATE OPENFILES PROC ACL PROFID RETPER R i SURGE SEQND SOURCE SSX SEY TABLEi TYPEPR X XA XE XEP [I] 0 PURPOSE OF FUNCTION; REQUEST STORM SURGE INFORMATION. XN XNP X~s xi Y YA YE YEP YMAX YN [2]�------------------------------------------ YNP~ YSE yl Y2 ALEIHA 6MC ALDSI( AE:FEM n ,S M ny [3] Ei CP qOPyCTL COPyNAME C 1 R CvP DD M C E F 1; 1,4] STIPRM SURGE~ INFOg: m G P F'ITM SG F ITP-`TS G F LGA mS1Gw OF)( (JFy OLD PA [5] 'Enter -storm surge etevat ion in feet NGVD: PC PEl..t P0 ETS LLIW Ci2 Q SF SI M SF SVP [6] CS[-'ECi-C4-O SW TM N ~~~~~~~~~~~~~~~~~~~~[7] 'Enter the return event which th is storm surge represents' [0 (e~g" 100 for the 100-year return event):, r.9] RE TPER4-0 vIINPLJT[O]' C[I0] 'Sourc e of store surge i nforma ti on (e.9., NOAA, U aof F, et c. ,: vINT [11] SOURCE*-ri C1] a PROEOF FUNCTION: REQUESTS INPUT DATA EXCEPT FOR, STORM SURGE [12] 1 E2] a INFORMATION. [13] SEQN04-SEQ~N04A [3] C. i[ 4:1 WANDS 15] OF1R PIROFILE:' C 6] 'Enter Exponent:' 17] EXP'-O VWANDS[O]v CO] 'Enter Shape Factor:' v WANDE;ACFG;ADFG;CEGH;DEGHl;D;AR1 ;AR2;1(;AR;J;MjAI ;CCiE;EJHiT;AREACirCiRHWTF f9] SEC-- ST;XC; YD [i10 'Date of Survey:' E1] a PURPOSE OF FUNCTION: DETERMINES DUNE-BLUFF HORIZONTAL RECESSION Cii] OFFDATE(-M [2] n USING THE WALTON--SENSAPAUGH METHOD01 (1979) FOR HURRICANE ELCUSEE 1-12] ------ ---------------------�' --------- ----- [33 F SEPT 197-5, WHERE THE PROFILE IS9 NOT INUNDATED. E131 ' ' [4] Xi+-X[4'X] 1-141 'ONSHORE PROFILE. DATA;':1 yfe Liii 'Enter distances tecasured from or ignat shoreLine at 0 NGVD' [6] A MAJOR OFFSHORE AREAS. C 161 ' (EntIer inI asc end inq nIumber i C a I or der inI fee t) :'[7] YA4-C-2 1-17] xi-O] [0]1 XA4.(YA�A)*(1�EXP) CrJ ] 'Enter e tevation corresponding to dlistances just specified (Ft NGVD) :' [] XC4-Cx4 Ci 19 Y(-O [10] ACFG4-(30-(YA--2) )x(XA-XC) 20] 'Date of Survey:' Eli1]' Yl)(-A X(XC*EXF,) V21 1 ONDATE-ti E12] AOFGq-(30-( (YA+YD)i2) )x(XA-XC) I.2 2 I 'Pr of i t e Type (Pre-Const or Post--Const ) : ' [3] CIZGI-IiXCx30 r"31 TYPIEI<R*-In [14] DEGI.I(-(30--(YD-2) )xXC f-2 ---------------------------�' FI5.] Df- (ACFG--ADFG)+--(CECIA-DEGI-) 15 EiEEENE16] AONSIIOREz AREAS EXCEPT FOR AREA CCI E 1-261 'Pr"-' MONMET NF:' LI?] ARIC-AR24-10 [17 I ' En1er DNR reference monument number (e~g R-26 ) Cie K LI 0] 1i 20I U] UM4-f I 19] ARF, 4( (Y1ICI [] 43 0 J CI< [+ J ]4.3 0 )-2 xX Xi [K]I-X1 I C K1]I 1.YI iy]'eminut y Nafie: '201'o i RIAR AR I~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~. 10 (211 L ] 4-1(1 I4II, -III ) 'LIr ci !.; ta n Ce thIIa - r ang e tinIIe is. f rom th1 I - .e rfeCr enIce mon)IIumIletI .' [ E221 --611SII<,a0,XI- 1 ['3'2 '( .n ._ H30indiate rai'3e is 300 feet northi of ip' if i ed m~ollu~ellt ) I'231 J&O 3.3-I biI(1- L' 124] 1-3: NEWX(-( i tX )-J .5-1] 'FIlter dist.Ince fromt thie normal exis~t ing shoret ine to the CCCL in feet: I 215,I 11,(Yi [i -YJ1' ['2 1) -(X i[EI]--X i E2 1 f.3 5'I D I S f i-UO [26]I A I vY1[ C2]-(x X I[E2 1 [36:: - ---.�--------------*---------~~~~~~~~~~~~~~~~~- v.7 H11 EWY1-YI L I I- ( M XJ X1 1-3/:1~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 120L] Ao I-e I' ( C I 11E WJY~ [1 Yi .1 -2) +:t ) 1.291 XI (NEWjX:1+ Xi [201 AR24-AR2,(((NEWY..IitqYY),-2)+30)xO.5 [31]-)I LIX1CI]<)Xi[.2] [30) YYi-YYNEWY 1:321 BSEI-iC (X(XC+NEWJX) [31) NEW'X [33) -)L2x1C:1i'Y[+Yl 132) 4L3xxNEWXX[Nf2] E34) Y24-Dx( I80-01) [33) D4--NI---Y-(X('+NEWX) E35) A24-DxXC [34) Y2+.Etx 130-a I [36) CCiEi-O.SXA2xXC [353 A2-94-xXC [37) EJHI(-(((itoYi)42)4-30)X(i+8XJ) [36) CCiEf-G.5xA2xXC 1:38) AREAf-(+/ARI )-(+/AR)))+EJHI [37) EJHIt-((Y[2j-2)4-30)xX[2l 1:39) C IRHO-IQ( ((A2+C) �2) +30) XNEWX [38) AREA4-(+/AR1 )+(+/AR2) E40) RESULTS [39) CIRHO4t-(((A2.#NEWY)-,2)-t30)xNEWX 1'41) AE(-AREA--CiRHQ [40) AE+-AREA-Ci RHQ 1-42) ADi-D+CC1E[1 A4DCIF E43) TESTt.-Ar-AD [42) TESJ(-AE-AD [44) ] -. [43) TEST [45) - 4L 3 x TEST >0 [44) J(-J-10. 5 f46) RESULTS [45) Ct-NEWY [47) 40 [46) 4L2xiTEST(0 I.40) - Li :Xi f-1 4,Xi [47) RESULTS 1[49) Yi 4-iWY [48) 40O ['50) A~i (-1,4,ARl [49) --L,)xi((pXi)~i)A(NEWX:�XIC1)) [5i)j AR2<- t0 [-50) L3: Ni-N-1- P5 2) -L3x IpXi:~O [5 1) _J4-0.5 r.153].) 40 [52) X I -1+~X I [54) L2:WANDS2 [53) Y14-14-Y1 [54) -i4L4K(pXi)=0 [55) X X -(l q) "X X),X I[1) C56) Y y4- (p I q)Y y ,y I[1I VW4ANDS21[O)' [57:1 AR2'-AR2%(pAIR2)-1),(30.#(Yi[il+YY[pYYI))2)XXI[1)-XXcsX)xx 7 WAN4DS2;ACF-G;ADFG;GCLGH;DEGH;D;ARI ;AR2;1(;ARiJ;M;Ai;CCIE;E.JHilAFREA;CiRF-Q;T [58) 4L2xk(pXl )>0 EST;XC; YD [59) L4:'YOUR DATA DOES NOT EXTEND FAR ENOUGH IN THE UPLAND DIRECTION' [1) a P UPS OF FUNCTION: DETERMINES DUNE-BLUFF HORIZONTAL RECESSION [60) 'TO COMPUTE THE DUNE EROSION.' [ 2) f USING THE WALTQN--SENEABAUGH METHOD (1979) FOR HURRICANE ELOISE [3) a OF SEPT 1975, WHERE 1THE PROFILE IS INUNDA.YED. [4) A~R24-AR1 -XXf-YY(-t0 [6) N4(X-(1-X1(YC/))V RESULTSjLjKiyO;X(3i;YOi [73 Xit-(X'_.-:((Y=C)/X))/X El] h~~~[1) PURPOSE OF FUNCTION: ACCUMULATES THE FINAL ERODED PROFILE DATA. FB 0i~~2'JUI/I [2) Lt-1I9 [90) I:ARIA 0 1(- XEI [3) X04-0 [10) '-- LIxiK;+1 [5) LI:X0t-XOLxI( [.i2) X4LI-(�N+1~ [6) X0i1-(1 x(204'XA,i4-XO) ) 0 Ei~~~~l YY(-(N+I~~~~~~~~~~~~tY ~~[7) L(-L-I [13 YY4j 4-0N+)5 C0) -) L Ix tL> I'14) L2:E4-0.5 '+ ['9) Y0I'-1ix(Ax((_IxX0i)44EXP)) C 16) Mi..(Yi[2]-YI[1])-4(,1[2---XiLi]) [10) XN*.-Ix(Xoi,X) [iol NEW~~~~~t-Yi[Il-mx~~~~~x-i Ci~[2) XE(--'IXKNEWX,HEWX, (-ixAC) ,*ixXA) r10) HFYo(-NY[1-MX1 [13) YE(-(tYi ),C,O,-IXYA [20) XfA4(YA-m))Ai+EXP r.IA V'L I_ 1 I .]XLC4 N E WYx A F2J (A LI 1,4- ( _ () -(Y ( [2 X A -X C f24] EL-Gl (V)3 ((AY)2)X X :' PLOTTI';IX;IE;XNN;YNN;XEN;YEZN;XNA;IIN;XXX;YYY;.[IE;YYE;ANE I ~~J LI [114 X ~xCXA 1 a PURPOSE OF FUNCTION: )ESSELATES PROFILE DATA FOR PLOTTING WITH [2)~~ ~~ aRHRONTAL. SCALE OF 1 INCHI 50 FEET AND A VERTICAL. SCALE. Of. I` D' (Alf G-C ADFG) 4 (C'EC.I-OEG) ]RO A 1'3 I INCH 1--I 0 FEET. 7 PLO;YLOC;XLOC ~~ YYY-XXX*-YYE'-~~~~~~~~~~~~~~~0 El) n~~C3 PURPOSE OF FUNCTION: PRODUCES THE FINAL PLOT(S) USING IlDm [5) XNN4-DIST+OXN [2) F EOITWARE FROM LTO 2 GRAPHFAR. cal 1xq-XNN'-,:0 [3) ERASE C 0) YNN~*I. xlq)YN [5) T514- I1I 19) XENt--XE+DIST [6) Pn4-STYLE 1 6 4 ,COLOR 7 7 7 (10) lE4-XEK'.l.50(- [71 gVP4- 10 10 86 50 [111) XENt-IE/XEN _____~. 0i6 006 08 3 1[12) YEN(-IE/YE 9 [13] xAr0x(rNl I0)[10) L2: [14) It-XNA,XNA+1500 [ill PLOT(YNP VS XNP) AND(YEP VS XEP) AND<YSS VS XSS) AND YMAX VS I[23 [15) LI :4L6)(l(pXNN)--0 [12) 10 ANNY 'Elev in Ft NGVDI [16) IINi-(XNN:�I[I])AXNN<LI[21 [13) 1 ANNX 'Dis~tance frol4 the CCCL. in Feet' [17) XNF"-XXX,IIN/XNN [14) YLOC4-10x(rYMAX-'I0) [18) YNp(-YyY, IIN/Y(WN [15) XLOC(-I[21-125 [19) IIE'-(XEN:I[I,`l)AXEN:.'I[21 [16) (XLOC,YLOC-2) TITL.E(CO,' County') [20) XEl:-XXX, I IE/XEN [17) (XLOQC,YLOC-4) TITLE(DNR,l ft from ',NUJM) [C2) YEP4-YYE,I1L YEN fig ] (XLOC,YLOC-6) TITLE 'Up!. Surv Date: ',ONDA[E [22J 4L4xi(XNNLpXNN](1[2'I)V(YNPEPYNPLeo) [19) -+o [231 ((XNNC(pXNF')+il)),XNP~pXNP)) LINEARU(YNNEUpYNP)-i1)),YNF'[PYNP)) C.20)' LI :YSS'-YSS+O.1 r.241 XNP4-XNF,,121' [21)I -*L2 [253 Y NP(- Y NP ,A A i. It ItxI V [26) L4:XNP4-XNPIC2I C27] YNP+-YNP~,,I xAix(1[2]-DI)T)~*EXP [2U1 Y R<ECO)3v E29) ((XEN~[(PXr.F')--l1),XEP[pXEFP)) LINEAri(YENE[(pYEP)+I)),YEFI[pYEP)) v RSLTS;DATE;DATijDAT2;D)AT3 [I0) XEF,4.XEPF, I[ C [2) El] PURPOSE OF FUNCTION: PROI)LCES THE WANDS DUNE-BLUFF RECESSION 131.] Y E P -YEP, A,)+EtEt x IflC [2) (2 DATA LISTING. [32) -)L2xlXEPLIXEP)(XEN[pXEH3 [3) DATEi--OTS[2),OTS[31,0TS[l1 [33) XEP4-Ii 4djXEP [4) D)ATIi-(20pl-'),(((20-I)FILE)p'.'),FILE),(((20-pNAME)p'.'),NAME) [34) YEPiq 4,l*4YEP [5) A1-A1(1P.)521((0DT~')TAE,2F' [35) L2:XSS'-I[iLIE2) [6) DAT2(-(20p'-),(20p' ,(2PX)'.,EPU2TAEC'',AP [36) YSS(-Gx(( lpX9S)-lpXSS) [37) YMAX4-40.+.i1YNP[,4YNP] [7) DAT24-DATr2,(((20-pOFFIDATE)p.,),()FFDATEI-),(40,?' [38) PLO CB] DAT2+-DAT2, (U20-PONDATE) p' 2>ONDATE) , (((20-s)TYFEP-R)? . ITYPEPR) [39) VIE~W [9) DAT2*-DAT2, (40p' I (U20-pl'CSPEC) p' ),fCSFEC), (U20-pTRETPER) p T [40) 'Do YOU WANT A HARD)COPY PLOT (YES OR NO)?1 RETPER) E41) ANS4-El [10) DA)T2*-DATr2,((F20-PEOURCE)P'.'),SOURCE) [42) --L3x (NS[ i =.Y') �11) DAT2i-DAT2,(40pl ,(2-NMp2,U)((0-C)2,O [43) .4L5 [12) DA'r2~-DAT2,(((20-pDNR)PI.1),DNR),(((20-pTDIET�''.'),iDIN'T),20p'-I [44) L3: 'GIVI T1lE PLOT A NAMEl' [13) Al(~-',(1-TEXp2,NW)((0-TITNW~2,DS [45) Ei-11 NEWX) [46) C'OPYN C [14) DAT3(-DAT3,(iOpl ,UOpDPCp.)TSE)((0pY) )T2 [4?j Lt15 XXX'-XNPE jXNP3 [15) l)AT3*-l)AT3, (l0p' '), (((iO-IT(AD�27))p'.'),TAD~-27) CA8) YyYY4YNI[pyNPj [16) DAT3*-DAT3,(((10-pT(AE--27))s)'.'),TAE-?27),(i0p' ' [49) YYEI-YEF"roYEPI [17) ] 3-A3((0-TAp.)TA,((0P(XA)'-)T1Y)1p- (.50) 14- I0 Fi [18 TADLEI4-LADD.E[I)U6 50 tLADA), 6 20 pDATi) E`51)I XNN14- pxNP) 4XNN [19) TADLEi(-TABLEi,C1) LABF,[i1)U21 50 LAD,21 20 PDAT2) [5)YNN'( pYNP) 4'YNN [20) TABLE14-TAEBLEi,[il LAl3G,[1)U(13 60 1'LABC), 13 10 PDAT3) L53) X1:N4((pXEN)-1 ),XEN [21) ALI-TDE,1 LADHA [5, A) YENA-( (PYCN) -i),~YFN [55)] *i6X t( pXNN) --0 ('561 -oLI x I (XNF'CpXNPJ)(<XNN[PXNN-) [57)- L 6RS L TS 1SHA FECOU)v y ~~~~~~~~~~~~~~~~~~~~~~~~v SliAl--E;CiAi ;D1 ;Ei ;A2i D2jE2iA3;D3;E3;Rl ;R2; R3 [I) * PUPOSEOF F'LNCTFION : DEIERMTHEE OFFSHORE PRFL POWER CURVE- FIT C2) 'I COEFFI CIENTS FOR NEW PROFILE DATA. v L ) C l Hv [3) ENTER DISTANCE OFFS1HOR.E: [4i Xi.O E5: ENTER CORRESPONDING ELEVATIONS AS +VE VALUES: [6:1 Y4- LA DO C 7 ] Cj- ( 4-/9X) 4./ ( (a)X) 2) 0Dc(X) x(mY ) )(+/0Y) +/ �( (0pY) 2) ------------------------------ [03 A -*C64-( (CC1 3xC[C3)--(C[2C[2xCC)) ( (C[I) 3*2)-( (pX)xt[2))) A. OFFSHORE PROFILE DATA 19) 1 -ci~i )xC[AJ)-((pX~xC[3)))((C[1)e2)- X Exponent (i.e., Shape Coefficient) D10) Z14-AiXX*Bl Scale Coefficient. O1il Ei4-(l(pX)x(+/(Zi-Y)*2))*0.5 Date of Profile Survey. C12) A22-(+/(Yx(X*(2-.3))))+(+/(X*4+3)) 1:13) Z21A2xX*2-3 B. ONSHORE PROFILE SURVEY [14) E2-(-(i1pX)X(+/(Z2-Y)*2) o0.5 Date of Profile Survey. [15) A3(*((C[4)-(C[1)x2+3))+pX) Profile Type. [16) Z3i-A3xXXi*23 E17) E34( (1-pX)x(+/(Z3-Y) *2) ) *0 5 C. STORM SURGE DATA Cie]8I)I Store Surge Elevation (ft NGVD). [19) County � ------------Ref Mon I.D0. .....Survey Date -- -------- Store Surge Return Period (years). [20) -------------------------------------- Source of Informat ion. [21) EFIPONENT ENPONENT FIYED AT 2/3' [221 Hoi U XE-- D. DNR REFERENCE MONUMENT INFORMATION [23) DIRECT LOGARITHMIC' DNR Reference Monument I.D. [24) METIOD METHOD' County. 25)� --------------------------------------- -Range to Mon Distance (ft). [26) Scale Coefficient: , (TAi) , ',(TA2),' ... CCCL to Shorelin Distance (ft). A3 [27) Exponent: ,(Tfi), ',(T2-3),' 1,T2+3 [20) R1&X CORR ZI [29) R2i-X CORR Z2 LADC [38) R34..X CORR Z3 E31) Correlation Coefficient: ,(TRi),' ',(TR2),' 1,TR3 Erosion Distance Measured from the Shoreline (ft) [32) RMS Error: ,(TEi), ',(E2),' ',TE3 Erosion Distance Measured from the CCCL (ft). [:33)7�.- Angle of Eroded Surface (tangent). Angle of Eroded Surface (degrees). vROWER[ON) Volume of Sand Deposited Offshore (cu yds/ft) v POWER Volume of Sand Eroded from Upland (cu yds/ft) [1) n PURPOSE OF FUNCTION: FITS A POWER CURYE. [2) LNX4..X Offshore Profile Closeout Distance (ft). 13) LNY-WY Offshor*e ProfiLe Closeout Depth (ft NGVD) [4)1 DO-(+/((LNX-((+./LNX)-pX))xL-NY))-(4 /((LNX-((+/LNX)-pX).)'2)) 15) AAix((4./LNY)-pY)--E(tDx((+/LNX)-'pX)) LADD FLORIDA DEPARTMENT OF NATURAL RESOURCES VLINEAR[CO) DIVISION OF BEACHES AND SHORES V X LINEAR Y- BUREAU OF COASTAL DATA ACQUISITION E1l a PIJRPOS*,E OF FUNCTION: FITS A LINEAR EQUATION. DUNE-BLUFF RECESSION PREDICTION E2) BBcD+/((X-((.f/X)-ppX))xY))-..(+/((X-((+/X)+pX))x2)) (Walton -- Sensabaugh Method) [3] AA(-((+/Y)-.pY).-(Eifix((.i./X)~pX)) v ADMINISTRATIVE INFORMATION LADA LABF F i Ic Number . ..... ................ .. .. INPUT INFORMATION FResponsilble for Data Input. In t *a s. )mte Job Comipleted (e,1/da/yr) ......................IG PfiEDICXTED RESUILTS FOR 11ORIZONTAL DUNE-BLLJFF RECESSION LABH KEY TO THE PLUNS) SoI d Line Surveyed Prof I Le Dashed Line -- Eroded Profil (Predicted) Dash-dot-dash Line -- Storm Surge Water Level