28
N.Z. Journal of Marine and Freshwater Research 12 (4): 429-56 December 1978 Rates of coastal erosion and accretion in New Zealand JEREMY G. GIBB* Department of Geology, Victoria University of Wellington, Private Bag, Wellington, New Zealand ABSTRACT Rates of coastal erosion and accretion for New Zealand are calculated for the period since early European colonisation. Methods used for calculating rates from cadastral plans, vertical aerial photographs and field measurements are described, evaluated, and illustrated with examples. The most natural reference line for measurements of shoreline changes and for defining the seaward boundary of land is the seaward limit of land vegetation. Measurements made from air photographs and plans at scales larger than 1:4000 have errors less than ± 1 m. As scales become small, errors increase proportionately. Along depositional shorelines, erosion and accretion generally occur at 0.5-4.0 m.y- 1 . Maximum erosion and accretion rates are 25.4 m.y- 1 at North Kaipara Head and 68.9 m.y- 1 at Farewell Spit respectively. Cliff recession generally occurs at 0.25 - 1.0 m.y- 1 with maximum rates of 2.25 m.y- 1 for mudstone cliffs at Cape Tumagain and 3.46 m.y- 1 for conglomerate cliffs at Ngapotiki. INTRODUCTION Coastal erosion is the process of removal of material at the shoreline which leads to loss of land as the shoreline retreats landward. Accretion is the product of deposition of material at the shoreline which leads to gain of land as the coast advances seaward. In this study, basic information collected by the author has been resolved into rates of coastal erosion and accretion (Appendix 1). Calculated rates cover the period since early European colonisation of New Zealand. Useful sources of information available for this type of study are listed in the references at the end of the text. Information was gathered between 20 March 1975 and 16 October 1977 from around New Zealand. Except for Fiordland and parts of the Marlborough Sounds, a systematic reconnaissance was completed of all accessible parts of the coast of the two main islands of New Zealand. Objectives of this paper are to make available existing New Zealand data on rates of coastal erosion and accretion (Appendix 1), to list sources of basic information, and to briefly illustrate, with examples, methods used for calculating rates. Patterns of coastal erosion and accretion around New Zealand will be dealt with elsewhere. THE SHORELINE By definition, the shoreline, or seaward boundary of any land, is the intersection of a specified plane of water with the beach (Allen 1972). In New Zea- land the seaward boundary of any land is defined in Section 35 of the Crown Grants Act, 1908 as " . . . . the line of high-water mark at ordinary tides". This line is interpreted as the mean of all high tides occurring "in the ordinary course of nature through- out the year", and is generally termed "mean high- water mark" (MHWM) (Kelly 1971). The shoreline shown on hydrographic charts, cadastral and topo- graphic maps of New 2^ealand is MHWM (Mr W. Watson, Cartographic Branch, Department of Lands and Survey, Wellington pers. comm.). By law, the land surveyor is required to make tidal observations every day for 365 days when fixing the seaward boundary of any land (Adams 1971). It is impractical, however, to determine MHWM by this method and then to trace that level along the coast by spirit levelling (Mr N. C. Gardiner, Chief Sur- veyor (rtd), Department of Lands and Survey, Well- ington, pers. comm.). In practice, therefore, MHWM is usually estimated from the position of natural markers such as the seaward limit of land vegetation, a line of driftwood, or a "wetted" line along the beach. Over the past century land surveyors in New Zealand have adopted seven different "shore- lines" to represent the seaward boundary of any land (Fig. 1). The seaward limit of land vegetation has been the most commonly preferred 'shoreline' (Figs 1 & 2). Received 23 December 1977; revision received 31 May 1978, *Present address: Water and Soil Division, Ministry of Works and Development, P.O. Box 12041, Wellington North.

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Page 1: GIBB—COASTAL EROSION AND ACCRETION · 2019. 3. 24. · Coastal erosion is the process of removal of material at the shoreline which leads to loss of land as the shoreline retreats

N.Z. Journal of Marine and Freshwater Research 12 (4): 429-56 December 1978

Rates of coastal erosion and accretion in New Zealand

JEREMY G. GIBB*

Department of Geology, Victoria University of Wellington,Private Bag, Wellington, New Zealand

ABSTRACT

Rates of coastal erosion and accretion for New Zealand are calculated for the period sinceearly European colonisation. Methods used for calculating rates from cadastral plans, verticalaerial photographs and field measurements are described, evaluated, and illustrated withexamples. The most natural reference line for measurements of shoreline changes and fordefining the seaward boundary of land is the seaward limit of land vegetation. Measurementsmade from air photographs and plans at scales larger than 1:4000 have errors less than ± 1 m.As scales become small, errors increase proportionately. Along depositional shorelines, erosionand accretion generally occur at 0.5-4.0 m.y-1. Maximum erosion and accretion rates are25.4 m.y-1 at North Kaipara Head and 68.9 m.y-1 at Farewell Spit respectively. Cliff recessiongenerally occurs at 0.25 - 1.0 m.y-1 with maximum rates of 2.25 m.y-1 for mudstone cliffsat Cape Tumagain and 3.46 m.y-1 for conglomerate cliffs at Ngapotiki.

INTRODUCTION

Coastal erosion is the process of removal ofmaterial at the shoreline which leads to loss of landas the shoreline retreats landward. Accretion is theproduct of deposition of material at the shorelinewhich leads to gain of land as the coast advancesseaward.

In this study, basic information collected by theauthor has been resolved into rates of coastal erosionand accretion (Appendix 1). Calculated rates coverthe period since early European colonisation of NewZealand. Useful sources of information available forthis type of study are listed in the references at theend of the text. Information was gathered between20 March 1975 and 16 October 1977 from aroundNew Zealand. Except for Fiordland and parts of theMarlborough Sounds, a systematic reconnaissancewas completed of all accessible parts of the coast ofthe two main islands of New Zealand.

Objectives of this paper are to make availableexisting New Zealand data on rates of coastal erosionand accretion (Appendix 1), to list sources of basicinformation, and to briefly illustrate, with examples,methods used for calculating rates. Patterns of coastalerosion and accretion around New Zealand will bedealt with elsewhere.

THE SHORELINE

By definition, the shoreline, or seaward boundaryof any land, is the intersection of a specified planeof water with the beach (Allen 1972). In New Zea-land the seaward boundary of any land is definedin Section 35 of the Crown Grants Act, 1908 as". . . . the line of high-water mark at ordinary tides".This line is interpreted as the mean of all high tidesoccurring "in the ordinary course of nature through-out the year", and is generally termed "mean high-water mark" (MHWM) (Kelly 1971). The shorelineshown on hydrographic charts, cadastral and topo-graphic maps of New 2^ealand is MHWM (Mr W.Watson, Cartographic Branch, Department of Landsand Survey, Wellington pers. comm.).

By law, the land surveyor is required to make tidalobservations every day for 365 days when fixing theseaward boundary of any land (Adams 1971). It isimpractical, however, to determine MHWM by thismethod and then to trace that level along the coastby spirit levelling (Mr N. C. Gardiner, Chief Sur-veyor (rtd), Department of Lands and Survey, Well-ington, pers. comm.). In practice, therefore, MHWMis usually estimated from the position of naturalmarkers such as the seaward limit of land vegetation,a line of driftwood, or a "wetted" line along thebeach. Over the past century land surveyors inNew Zealand have adopted seven different "shore-lines" to represent the seaward boundary of any land(Fig. 1). The seaward limit of land vegetation hasbeen the most commonly preferred 'shoreline' (Figs1 & 2).

Received 23 December 1977; revision received 31 May 1978,*Present address: Water and Soil Division, Ministry of Works and Development, P.O. Box

12041, Wellington North.

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430 N.Z. JOURNAL OF MARINE & FRESHWATER RESEARCH 12 (4), 1978

METHODS

In this study, changes in the position of the coastover the past century were determined from cadas-tral plans, hydrographic charts, vertical aerial photo-graphs, field measurements, and information sup-plied by people living near the coast. Rates werecalculated by dividing the amount of horizontalshoreline displacement by the time interval betweeneach successive survey; negative values ( - ) areerosion and positive ( + ) are accretion.

Aerial photographs were studied at Head Office,Department of Lands and Survey, Wellington, whichholds copies of all aerial photographs of New Zea-land dating from about 1934 to the present day.Cadastral plans dating from mid 19th century werestudied in district offices of the Department of Landsand Survey around New Zealand, each of whichholds a complete set of plans for its respective LandDistrict. Hydrographic charts dating from 1842 werestudied at the Hydrographic Branch of the RoyalNew Zealand Navy in Auckland. Rates have been

FIG. 1—Seven reference lines used by New Zealandland surveyors to define the shoreline (MHWM)on cadastral plans over the century 1870-1970:1 - Geodetic MHWM (average height of the high-tides over an 18.6y period); 2-"Wetted" line-3 - Driftwood line; 4 - Toe of foredune or cliff;5 - Vegetation line; 6 - Crest of beach ridge orforedune; and 7 - TOD edge of cliff.

summarised from relevant publications and from un-published sources of information including New Zea-land Government Reports, consultant's reports, andtheses on coastal processes. For Appendix 1, 72% ofthe observations listed were gathered directly by theauthor, and 28% are from published and unpublishedmaterial.

FIG. 2—Waimangaroa River mouth (west coast,South Island) and associated southern coast, 1943-1976. Coastal erosion is occurring along 10 km ofcoast either side of the mouth.

a - Run 796, photo 4, 25 May 1943.b - Run 858, photo 13, 12 April 1955c-Run SN3777, Photo G/ l , 25 November 1974d - Run SN 2983, Photo L/l , 5 October 1976.

The left hand road leading to the coast in eachphotograph was used for measurements (see Table2). The proximity of the group of macrocarpa treesto the coast reflects the amount of erosion withtime. Note the truncation of the right hand roadleading to the coast by river erosion. (Aerial photo-graphs published by permission of Department ofLands and Survey, N.Z.).

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GIBB—COASTAL EROSION AND ACCRETION 431

ERRORS

Three possible sources of error may affect theaccuracy of rate calculations from plans or aerialphotographs. Firstly, successive cadastral plans of thesame locality may adopt different criteria for sea-ward boundaries (Fig. 1). Secondly, errors inherentin aerial photographs, such as relief displacementsand distortion away from the photo-centre, mayfalsify measurements (Kirk 1975). Thirdly, measure-ment errors may be made by the individual.

FIG. 3—a-Shoreline changes along the Waimangaroacoast (west coast, South Island) 1876-1976, plottedon aerial photographs taken in 1943. The obliquestrike of Holocene dune belts to the present coast-line is evidence that this coast is in the process ofrealigning, b - Ground photograph taken 12 Febru-ary 1977 looking north towards the group of macro-carpa trees (Fig. 2; fallen trees in the backgroundare evident on Fig. 2d). The erosion scarp shownis characteristic of actively eroding depositionalcoasts. (Aerial photographs published by permis-sion of Department of Lands and Survey, N.Z.).

The first possibility is dealt with by referring to thesurveyor's field book or traverse book and clarifyinghis definition of MHWM, and then by consistentlyusing the same reference shoreline (Fig. 1) at eachlocality for all measurements. In the present studythe reference shoreline was taken as the vegetationline along depositional coasts and the top edge ofcliffs along steeply cliffed coasts. The second pos-sibility of error may be controlled by establishing abase line of known length on each successive aerialphotograph as near to the photo-centre as possible.

The third possibility may be calculated if theaccuracy of measurements is known; it is generallythe most significant source of error. All measure-ments made in this study on aerial photographs andsurvey plans have an estimated accuracy of ±0.25mm. Based on this, errors have been calculated forvarious scales (Table 1). As scale decreases, errorsincrease and measurement error becomes highly sig-nificant with shoreline displacements of only a fewmetres. The most accurate measurements are achievedfrom plans and photographs at scales greater than1:4000. Small shoreline displacements of 2-5 m be-come insignificant in terms of error at scales between1:8000 and 1:16 000.

EXAMPLES

Methods used in this study for the calculation andevaluation of rates are illustrated by four examples.

AERIAL PHOTOGRAPHS

Figure 2 shows the Waimangaroa River mouth,15 km northeast of Westport, west coast, South Island(see Fig. 6). A baseline was established for 620 malong the section of road sub-parallel to the coastfrom the northern road junction to the right-angledcorner to the south. The scale of each photographwas calculated using the baseline length establishedon cadastral plans. Distances were measured alongthe southern beach road from the south end of thebaseline to the seaward limit of land vegetation.Results were converted to metres using the scale foreach photograph. Rates were calculated by dividingthese values by the time interval in years anddecimals between successive survey flights. Errorsbased on an order of accuracy of measurements oneach aerial photograph of ± 0.25 mm were thencalculated. The results show that between 1943and 1976 (33 y) about 74 m of coast has beenlost by erosion at Waimangaroa at a net rate of2.2 ±0.1 m.y-1 (Table 2).

Changes in position of the shoreline at Waimanga-roa since 1876 are summarised in Fig. 3. There hasbeen a net retreat of 235 m over the past 100 y(Item 027, Appendix 1). Past shoreline positionswere plotted from cadastral plans made in 1876 and1925 and from vertical aerial photographs shown inFig. 2.

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432 N.Z. JOURNAL OF MARINE & FRESHWATER RESEARCH 12 (4), 1978

3 j

TOWiMSHJF | 9 3 8

SUPiRSCPtD BY S.O. MS<>f SiSi^

! % i ? >

FIG. 4—Survey Office plan 1938 of Brighton, west coast, South Island. The 1973 position of MHWM (vege-tation line) was plotted by the author from aerial photographs. Coastal erosion has resulted in a retreat ofthe shoreline along 7 km of this coast. The amount of erosion from 1867 to 1973 was measured directlvtrom we line scale on the original plan. (Plan published by permission of the Department of Lands and

FIG. 5 ~ T W O examples of field measurements fromreference points dating past shorelines. (Upper) -Stern view of Fusilier on Santoft beach (Fig. 6)20 March 1975, landward of recently constructedforedune. The wreck dates the approximate posi-tion of MHWM in 1884. Amount of accretion wasmeasured from the wreck to present-day MHWM.(Lower) - Concrete gun-emplacement at Kaitokebeach (Fig. 6) 21 March 1975, outflanked by coastalerosion exposed on the beach during low-waterspring tides. It marks the 1940 position of thesecond dune in from the sea. The amount oferosion was measured from the gun-emplacementto the position of the present-day secondary dune.

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GIBB—COASTAL EROSION AND ACCRETION 433

CADASTRAL PLANS

Cadastral plans show surveyed land boundaries,including MHWM, for describing and recordingownership. Those held by the Department of Landsand Survey are of three kinds: transfers of CrownLand are recorded on Survey Office plans (S.O.s),Public Land on Deposited Plans (D.P.s), and MaoriLand on Maori Land plans (M.L.s).

The 1867 survey office plan (S.O. 1938) shown inFig. 4 is of the gold mining town of Brighton at themouth of the Fox River between Westport and Grey-mouth, west coast, South Island (see Fig. 6). In the1870s, Brighton boasted a casino, billiard saloons, and53 pubs (Nolan 1975). Today no trace of this townof several thousand people is left. A combination ofcoastal erosion and the passing of the gold rush haveled to its destruction.

TABLE 1—Measurement errors on plans of variousscales based on a plan measurement accuracy of±0.25 mm.

Scale

1:100 0001:63 3601:31 6801:15 8401:79201:60001:39601:20001:10001:792

Measurement Error(m)

± 2 5± 1 6± 8-+• 4

± 2± 1.5•+• 1 .0•+• 0 . 5± 0.25-i- 0.2

The 1867 position of MHWM shown on the planrepresents the vegetation line. Aerial photographstaken in 1973 were used to plot this same line onthe old plan using proportional dividers and geo-graphic fixed points common to both plan and aerialphotographs. Shoreline changes indicate 50-76 m ofcoastal erosion over a period of 106 y (Items 021 &022, Appendix 1).

FIELD MEASUREMENTS

Field measurements were made from a knownreference point or line dating a past shoreline to thepresent day shoreline. Two examples are shown inFig. 5. Figure 5 (upper) shows the wreck of Fusilieron Santoft beach, Wellington west coast (Fig. 6).This steel barque of 404 tons was wrecked in 1884,settling between low- and high-water marks. Overthe 97 y since the wreck the coast has built out about100 m at a net rate of 1 m.y x (Item 113, Appendix1). A foredune has been constructed and is engulfingthe wreck.

Fig. 5b shows a World War II concrete gun-emplacement at Kaitoke Beach, Wanganui (Fig. 6)that has been outflanked by coastal erosion. In 1940,it was constructed on the second dune in from thesea and is now well seaward of the foredune. Thecoast has retreated by 70 m at a net rate of 2 m.y-1

over the past 37 y (Item 114, Appendix 1).

TABLE 2—Calculation of rates of coastal erosion from measurements made from aerial photos of theWaimangaroa coast (Fig. 2) with two examples of calculation of errors (R = rate; D = horizontal distance;T = survey interval).

FlightDate

25/5/43

12/4/55

25/11/75

5/10/76

EXAMPLES

(a) D =

=

R =

=

.'. R =

(285.

- 3 7

D

T

Photo- Horizontalscale Distance

(D, m)

1:6630 285.1

1:6460 248.1

1:6810 218.6

1:6710 211.4

.1 ± 1.66) - (248.1 ±

± 3.28 m

- 3 7 m ± 8.9%

11.9 y

-3.11 m ± 8 . 9 %

-3.1 ± 0.3 m.y1

Measure-ment Error

(m)

±1.66

±1.62

±1.70

±1.68

1.62) m

SurveyInterval(T, y)

11.90

19.55

1.89

(b) D =

=

R =

=

.". R =

NetErosion

(m)

-37.0

-29.5

- 7.2

(285.1 ±

-73.7 ±

-73.7 m

1

(R,

- 3

- 1

- 3

1.66) - i

3.34 m

±4.5%

33.34 y

-2.21m

-2.2 ± 0

± 4.5%

i.l m.y-1

Rate

m.y-1)

.1 ± 0.3

.5 ± 0.2

.8± 1.8

(211.4 ±

NetRate

(m.y-1)

2.2 ± 0.1

1.68) m

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434 N.Z. JOURNAL OF MARINE & FRESHWATER RESEARCH 12 (4), 1978

170°E North Cape

-35S Cape Brett71

65

195; North Kaipara Head

TASMAN SEA

395

- 40114; Gun-emplacement

113; Fusilier wreck

045; Farewell Spit

CHRISTCHURCH

SOUTH ISLAND

040,035.

027; Waimangaroa^ 030,025

021;022; Brighton

345Cape Turnagain; 342

340335

WELLINGTON330

Ngapotiki; 326Palliser

SOUTH PACIFIC OCEAN

OtagoPeninsula

PuysegurPoint

220

FIG. 6—General location of every fifth item in Column A of Appendix 1. Aerial photographs, survey plans,and field books for determining rates of coastal movsment are held in Lands and Survey district offices inthe cities and towns named.

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GIBB—COASTAL EROSION AND ACCRETION

CONCLUSIONS

Rates of erosion or accretion may be determinedfor any locality around the New Zealand coast fromeither cadastral plans or vertical aerial photographsheld in offices of the Department of Lands andSurvey.

The seaward limit of land vegetation is the mostnatural reference line to use for defining the seawardboundary of land on the open coast.

Measurements of shoreline changes made fromaerial photographs and plans at scales larger than1:4000 generally have errors less than ± l m . Errorsincrease proportionately as scales become small sothat small shoreline displacements of 2-5 m becomeinsignificant at scales between 1:8000 and 1:16 000.

Along depositional shorelines in New Zealanderosion and accretion has generally occurred at ratesof 0.5-4.0 m.y1 . The highest accretion rate recordedwas 68.9 m.y"1 at Farewell Spit (Item 045, Appen-dix 1), whereas the maximum erosion rate recordedwas 25.4 m.y~l at North Kaipara Head (Item 195,Appendix 1).

Cliff recession has generally occurred at 0.25-l.Om.f1 with maximum rates recorded of 2.25 m.y-1

for mudstone cliffs at Cape Turnagain (Item 342,Appendix 1) and 3.46 m.y"1 for conglomerate cliffs atNgapotiki (Item 326, Appendix 1).

ACKNOWLEDGMENTS

I sincerely thank the following people who con-tributed so much to this study: the Chief Surveyorsand staff of the Department of Lands and Survey inNew Zealand, the Hydrographer and staff of theHydrographic Branch, Royal N.Z. Navy, staff of theMinistry of Works and Development, Mr Jack Johan-sen, Wellington Regional Water Board, and to allthose people living near the coast who supplied in-formation and assisted during field work.

Professor H. W. Wellman and Sir Charles Flemingsupervised this aspect of my doctoral research pro-gramme and with Dr J. D. Collen read the manuscriptand provided constructive criticisms. Mr E. Hardydraughted the figures and my wife, Ann, kindly typedAppendix 1 and draft manuscripts. Financial sup-port was provided by the Soil Conservation andRivers Control Council and the Internal ResearchCommittee of Victoria University and is gratefullyacknowledged. The permission of the SurveyorGeneral, Department of Lands and Survey, to pub-lish aerial photographs of Waimangaroa and thecadastral plan of Brighton is acknowledged.

REFERENCES

(Numbers refer to those listed in Column (/),Appendix 1)

1. ADAMS, E. C. 1971: "The Land Transfer Act1952". 2nd ed. Butterworth, Wellington. 700 pp.

2. ALLEN, R. H. 1972: A glossary of coastal engineer-ing terms. Coastal Engineering Research CenterMiscellaneous Paper 2-72. 55 pp.

3. ANONYMOUS. 1975-77: Local informants whosenames were not recorded (Westland, 4 informants;Nelson, 5; Taranaki, 4; Northland, 3; East Coast,7; Coromandel, 1).

4. ARMON, f. W. unpublished 1970: Recent shore-lines between Banks Peninsula and CoopersLagoon. M.A. thesis lodged in the library, Univer-sity of Canterbury, Christchurch. 171 pp.

5. BECA CARTER HOLLINGS & FERNER LTD. unpub-lished 1977: Omaha foreshore erosion investiga-tion. Report to Rodney County Council, 32 pp.(Available from Beca, Carter, Hollings & FernerLtd., P.O. Box 6345, Auckland).

6. BLAKE, G. J. 1967: Tidal hydrology in PegasusBay. Earth Science Journal 1 (2): 149-52.

7. BURGESS, J. S. unpublished 1971: Coastline changeat Wanganui, New Zealand. Ph.D. thesis lodgedin the library, University of Canterbury, Christ-church. 145 pp.

8. CHESTERMAN, I. J. 1977: Pers. comm. (Holidaybach owner, Ohiwa Spit, Bay of Plenty).

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10. DE LACY, H. 1977: Menacing sea eating intoSouth Canterbury. N.Z. Farmer 98(21): 21-23.

11. DINGWALL, P. R. 1974: Bay-head sand beachesof Banks Peninsula. N.Z. Oceanographic InstituteMemoir 15. 64 pp.

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13. FANCOURT, T. J. 1977: Pers. comm. (Chief engi-neer, South Canterbury Catchment Board, P.O. Box160, Timaru).

14. FLEMING, C. A. 1953: The geology of the Wanga-nui Subdivision. N.Z. Geological Survey Bulletin52. 361 pp.

15. FOLK, R. L. 1968: "Petrology of SedimentaryRocks". Hemphills, Austin, Texas. 170 pp.

16. FURKERT, F. W. 1947: Westport Harbour. Trans-actions of the Royal Society of N.Z. 76(3): 373-402.

17. GARDINER, N. C. 1977: Pers. comm. Chief Sur-veyor (rtd), Department of Lands and Survey,Wellington.

18. GIBB, T. G. Personal measurements from airphotographs held by Department of Lands andSurvey, Head Office, Wellington.

19. Personal field measurements.

20. unpublished 1973: Report on coastal pro-cesses and erosion Southern Hawke's Bay Hau-moana to Clifton. Internal report of Water andSoil Division, Ministry of Works and Development,Head Office, Wellington. File ref. 75/14/56. 18 pp.

21. unpublished 1975: A geologic and quan-titative report on the coastline from Cape Tura-kirae to Pencarrow Head with special reference toFitzroy Bay. Internal report of Water and SoilDivision, Ministry of Works and Development,Head Office, Wellington. File ref. 75/19/56. 18 pp.

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436 N.Z. JOURNAL OF MARINE & FRESHWATER RESEARCH 12 (4), 1978

22. 1977: Late Quaternary sedimentary pro-cesses at Ohiwa Harbour, Eastern Bay of Plenty,with special reference to property loss on OhiwaSpit. Water and Soil Division, Ministry of Worksand Development, Wellington. Technical Publica-tion 5. 16 pp.

23. GIBB, J. G. & JONES, I. E. unpublished 1977:Coastal erosion, protection and development atWainui Beach, Gisborne. Internal report of Waterandb Soil Division, Ministry of Works and Develop-ment, Wellington. File ref. 75/13/56. 17 pp.

24. GORDON, I. 1975: Pers. comm. (Fanner, OceanBeach, Hastings).

25. HAWERA COUNTY COUNCIL. Plan of coastalerosion at Ohawe Beach, 1959-66. Plan 122.(Available from Hawkes Bay Catchment Board,P.O. Box 233, Napier).

27. HEALY, T. R., HARRAY, K. G., & RICHMOND, B.1977: Bay of Plenty coastal erosion survey. Depart-ment of Earth Sciences, University of Waikato,Occasional Report 3. 64 pp.

28. HOBBS, R. J. unpublished 1975: Some planningimplications of coastal erosion. Dissertation forDiploma of Town Planning lodged in the library,University of Auckland. 41 pp.

29. HOLMES, R. W. 1919: Littoral drift as affectingharbour construction in New Zealand. Proceedingsof the N.Z. Society of Civil Engineers 5: 74-141.

30. HOLMES, P. D. L. 1976: Pers. comm. (Chiefengineer, Taranaki Harbour Board, New Ply-mouth) .

31. HYDROGRAPHIC BRANCH, ROYAL NEW ZEALANDNAVY: Hydrographic charts. (Hydrographer, CdrI. S. Monro).

32. KELLY, E. M. 1971: "Summary of the LawRelating to Land Surveying in New Zealand". 4thed. Rev. B. H. Davis. Hutcheson, Bowman andStewart, Wellington. 296 pp.

33. KIRK, R. M. 1969: Beach erosion and coastaldevelopment in the Canterbury Bight. N.Z. Geo-grapher 25: 23-5.

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40. MCINTYRE, R. unpublished 1958: Coastal erosion,South Canterbury up to 1958. Internal report ofMinistry of Works and Development Residency,Timaru. File ref. 13/7/1. 16 pp.

41. MCLEAN, R. F. & BURGESS, J. S. 1975: Bar depthand beach changes around a New Zealand rivermouth port: Wanganui 1850-1870. Proceedings ofthe Second Australian Conference on Coastal andOcean Engineering: 61-1A.

42. MCLEAN, R. F. (ed.) 1976: Case studies ofcoastal progradation in New Zealand during thepast century: Report prepared for the InternationalGeographical Union's Working Group on thedynamics of shoreline erosion. 98 pp.

43. MINISTRY OF WORKS AND DEVELOPMENT: Plansof coastal erosion, Clifton and Waimarama beaches.File 75/14/56. (Held by Water and Soil Division,Ministry of Works and Development, Head Office,Wellington).

44. Plan of coastal erosion, Waitaki Boys'High School. 1861-1976. File 19/12 (Held byMinistry of Works and Development Residency,P.O. Box 340, Oamaru).

45. NAPIER HARBOUR BOARD: Napier, hydrographiccharts of Napier Harbour.

46. NELSON LAND DISTRICT: Department of Landsand Survey, Nelson. Cadastral plans (Chief Sur-veyor, O. L. Amor).

47. NELSON HARBOUR BOARD: Nelson, hydrographiccharts and survey plans of Port of Nelson.

48. N.Z. GEOLOGICAL SURVEY 1973a: Quaternarygeology - North Island 1:1000000 (1st ed.) N.Z.Geological Survey Miscellaneous Series Map 5,DSIR, Wellington.

49. N.Z. GEOLOGICAL SURVEY 1973b: Quaternarygeology - South Island 1:1000 000 (1st ed.) N.Z.Geological Survey Miscellaneous Series Map 6,DSIR, Wellington.

50. NOLAN, T. 1975: "Gold Trails of the West Coast".Reed, Wellington. 88 pp.

51.0TAGO LAND DISTRICT: Department of Lands andSurvey, Dunedin. Cadastral plans. (Chief Surveyor,R. C. Petre).

52. PEARSE, R. unpublished 1950: Recent changes inthe Sumner foreshore and estuary and the influ-ences involved. MA thesis lodged in the library,University of Canterbury, Christchurch. 195 pp(in 2 vols).

53. PETRIE, C. D. 1977: Pers. comm. (Landowner,Kuaotunu Beach, Coromandel Peninsula).

54. PICKRILL, R. A. 1976: The evolution of coastallandforms of the Wairau Valley. N.Z. Geographer32: 17-29.

55. PULLAR, W. A. 1977: Pers. comm. (Scientist, rtd,Rotorua).

56. PULLAR, W. A. & SELBY, M. J. 1971: Coastal pro-gradation of Rangitaiki Plains, New Zealand. N.Z.Journal of Science 14(2): 419-34.

57. REDFERN, P. 1974: Biology and distribution ofthe toheroa Paphies (Mesodesma) ventricosa(Gray). Fisheries Research Bulletin 11. 51pp.

58. REVINGTON, D. 1977: Pers. comm. (Chief Engi-neer, Bay of Plenty, Catchment Commission, P.O.Box 364, Whakatane).

59. SCHOFIELD, J. C. 1960: Sea level fluctuationsduring the last 4000 years as recorded by a chenierplain, Firth of Thames, New Zealand. N.Z. Journalof Geology and Geophysics 3(3): 467-85.

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GIBB—COASTAL EROSION AND ACCRETION 437

60.Spit

1967: Sand movement at Mangatawhiriand Little Omaha Bay. N.Z. Journal of

Geology and Geophysics 10: 697-731.

61. SHAW, M. 1975: Pers. comm. (Goldminer, Gilles-pies beach, Westland).

62. SMITH, R. K. unpublished 1977: Progradationand retrogration of the sand country in the Gis-borne and East Coast District. Internal report ofWater and Soil Division, Ministry of Works andDevelopment, Head Office, Wellington. File ref.75/13/56. 8 pp.

63. SOUTH AUCKLAND LAND DISTRICT: Departmentof Lands and Survey, Hamilton. Cadastral plans(Chief Surveyor, K. W. Walsh).

64. SOUTHLAND LAND DISTRICT: Department ofLands and Survey, Invercargill. Cadastral plans(Chief Surveyor, G. A. Wilson).

65. STEVENS, G. R. 1973: Late Holocene marine fea-tures adjacent to Port Nicholson, Wellington, NewZealand. N.Z. Journal of Geology and Geophysics76(3): 455-84.

66. SYMES, R. 1976: Pers. comm. (Farmer, Manu-tahi, Hawera).

67. TARANAKI LAND DISTRICT: Department of Landsand Survey, New Plymouth. Cadastral plans (ChiefSurveyor, T. Bright).

68. WATSON, W. 1977: Pers. comm. (CartographicBranch, Department of Lands and Survey, Welling-ton).

69. WAIRARAPA CATCHMENT BOARD: Masterton. Planof coastal erosion, Riversdale beach. Plan 1/49601(Held by Wairarapa Catchment Board, P.O. Box41, Masterton).

70. WELLINGTON LAND DISTRICT: Department ofLands and Survey, Wellington. Cadastral plans(Chief Surveyor, M. Armstrong).

71. WESTLAND LAND DISTRICT: Department of Landsand Survey, Hokitika. Cadastral plans (Chief Sur-veyor, S. M. Williams).

72. WRIGHT, L. W. 1969: Coastal changes at theentrance to the Kaipara Harbour 1836-1966. N.Z.Geographer 25(1): 58-61.

APPENDIX 1—(Overleaf) Rates of coastal erosion and accretion around the New Zealand coast tabulatedfor 471 localities. Key to columns: (A) = localities numbered consecutively as shown on Fig. 6; (B) =locality names; (C) = NZMS 1 grid reference; (D) = land forms, their age of formation, and lithologyof material forming the coast at each locality and (E) = texture of beach sediments (for abbreviation in(D) and (E) see Appendix 2)

Column (F) = survey years, information on significant erosion events, tectonic movements, establishmentof coastal subdivisions, and aggregate mining of beaches; (G) = land gained from accretion ( + ) or lostfrom erosion ( —) is tabulated as a horizontal distance in metres for each locality; (Items 312, 313, 314,and 324 record land gained by tectonic uplift from the 1855 Wellington earthquake); (H) = rates oferosion/accretion (m.y-1) for each survey interval; (I) = net rate (m.y-1) for entire survey period; and(T) = references (numbers listed correspond with those in reference list at the end of the text, and addressesof local informants are held by the author).

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438

(A) (B)

N.Z. JOURNAL OF MARINE & FRESHWATER RESEARCH 12 (4), 1978

(C) (D) (E) (F) (c) ( H ) (0 (0N 2 H 5 1 LITHDLOGY SURVEY INTERVAL ACCRETIONS) OR RATES NET RATE DATA

GRID REF. AND AGE BEACH <v] EROSI0N( -X m ) (™>y~ ) (m«y~ ) SOURCE

JACHSON'5 BAY

002 JACKSON'S BAY S87/B07137

003 BRUCE BAY 578/300463

• 04 ERLICE QAY S78/335482

0D5 HUNTS BEACH S7B/350525

0D6 GILLE3PIE5 BEACH S70/507690

• 07 LlAimiA S57/263270

008 KCfclTIKA S5D/519559

S44/723B9Q

H d

H d

H,r/s

H r

S/G

S/G

S/G

G/5

G

S/G

S/G

1904-1920

1920-1962

1962-1971.

1362-1975

1935-1975

1884-1928

1925-1950

1930-1975

1945-1975

1945-1975

1867-1914

1914-1953

1958-1975

1930-1944

1944-1963

-50

-200

-100

+ 1D

-30

-120

-100

-300

-20

-250

-20

• 61

-3.13

-4.76

-a.34

+0-77

-0.75

-2.73

-4.0

-6.67

-0.67

-8.3

-0.43

+ 1.39

+1.47

+6.29

D

-5.0

+0.77

-0.75

-3.33

-6.67

-0.67

-6.3

3

71

19

3

012

• 13

GREVKQUTH S44/745958

RAPAHDE TRIG D 544/766974

014

015

D16

0 1 7

018

019

020

0 2 1

022

023

024

RAPAHOE

ei.RRVTD'jJN

BARRY TOWN

BARRYTDiiJW

BARRY TOLJN

BARRY TOWN

BARRYTOUN

TIRGMOANA

TIRQnDANA

NINE MILE BEACH

CARTER5 BEACH

544/772985

544/BZ309B

S37/825112

S37/B26121

S37/827130

537/831177

S57/B32187

S37/896393

537/897395

S3D/963593

S24/D7B753

NORTH BEACh S24/037753

H r S AkS7aT. -M/ST.

G

G

S/G

S/G

S

1C88-1910

1910-1971

1910-1935

1935-1971

1898-1936

1082-1901

1901-1929

1929-1975

1950-1975

1930-1975

193D-1975

1930-1975

1930-1975

1930-1975

1930-1975

1867-1973

1667-1973

1950-1975

1880-1919

1919-1968

1BB0-1919

1919-1968

1867-1884

1884-1905

1905-1921

1921-1955

1955-1968

1B76-1925

1925-1943

1943-1955

1955-1974

1974-1976

-2D

-50

-14

-24

-30

0

-50

-60

-60

-100

-160

-140

-90

-140

+ 110

-76

-50

-60

+853

+ 160

+954

+500

-104

+76

-79

-82

-37

-29.5

-7.2

-0.91

-0.82

-0.56

-0.67

-0.63

0

-0.62

-0.63

-1.JU

-2.4

-2.22

-3.56

-3.11

-?.O

-3.11

+2.44

-0.72

-0.47

-2.4

21.88

+3.26

24.46

10.2

0

-6.09

-5.49

-3.06

+5.B3

-1.61

-4.56

-3.11

-1.51

-3.81

-1.18

-2.4

-2.22

-3.56

-3.11

-2.0

-3-11

+2.44

-0.72

-0.47

-2.4

+11.51

+16.52

-2.42

-2.35

29

46

46

46

46

46

46

46

46

18

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GIBB—COASTAL EROSION AND ACCRETION 439

(A)

oze

(B) ( C )

NTH WAIHANGARDA S2<t/2288aO

(D)

H,d

(E)

E/S

0 2 9

0 3 0

0 3 1

JONES CREEK

NGAHAUAU

HECTOR

524/245815

S24/336901

524/344908

032

033

034

NIKAU 524/385978

NIKAU 524/391992

MDKIHINUI TRIG AP. 517/394002

LITTLE UANGANUI S1S/512165 H,d

TE NflMU S1B/522187 H-d

S18/527Z14

KONGAHU SCHOOL

Qi*1

01*2

0(.3

KARAMEA

KARAMEA

KARAMEA

FAREWELL SPIT

S1Z/6'*9367

S12/552398

S1Z/553<*19

S1/398182

TO MblM

FAREWELL SPIT S1/39B1B2 H3m S

TD LUM

WIDENING DF SPIT OVER ENTIRE LENGTH

WIDENING DF SPIT OVER LAST 2/3 LENGTH

EROSION DF INSIDE DF 5PIT DUER FIRST1/3 LENGTH

(F)

1H9Q-1905

1905-1921

1921-191*3

19^3-1973

190<4-T96B

1899-1931

1931-196fl

1373-189**

1694-196B

1897-1975

19D2-1975

1875-1888

1BB8-19I.7

19^7-1975

1975-1977

1879-1891

1891-1901

' 1901-1968

1B79-1B91

1B91-1901

19D1-1966

1B79-1B91

1891-1926

1926-1955

1955-1963

1963-1968

1968-197<*

197<t-1977

1879-1891

1891-1926

1926-1936

1936-1968

1679-1B91

1891-1926

1926-1936

1936-1972

1891-1926

1926-1936

1936-19G8

1937

1B67-196B

193B-196B

1936-196B

1851-193B

1938-196**

196*1-1970

1970-1975

1851-1938

1938-1961*

1851-1938

1938-1961*

1936-1961*

(G)

-125

-99

-51

- 35

-17D

+<*a

- 1 9

0

+61

-<*0

- 3 2

- 1 1

- 1 1

- 8 0

+68

-94

- 5 7

+3

- 5 0

-B1

-B.6

-6.4

-2.8

-2.2

0

(I)

0

-32

-24 .

-65

-12

-2B

-67

SCHOOL MOUED INLAND

+90

+ 100

+ 140

0

+ 2471

+ 92

D

+6993

+792

+72.5

+270

-64

-8.33

-6.19

-2.32

-1.17

-2.66

+ 1.25

-0.51

0

+0.B2

- • . 5 1

-0.44

-0.B5

-0.19

-0.32

-6.67

-0 .5

-0.36

-1.19

+6.1B

-8.55

-0.B5

+0.25

-1.43

-2.79

-1.06

-1.39

-0.41

-D.96

0

-0.51

-3 .0

-2.34

0

-0.91

-2 .4

-1.B1

-0.34

-2 .8

-2.09

+0.B9

+3.33

+4.67

0

+95.04

+15.33

[I

+B0.3B

+3D.46

+0.8B

+10.38

-3.73

-2.66

+0.30

+0.64

-0.51

-0.44

-0.38

-1.D1

-D.93

-1.76

-1.38

-1.3D

-1.39

+0.89

+3.33

+4.67

+ 20.5

+68.89

+3.03

36

46

46

46

46

46

46

46

46

4fi

46

45

46*"

46

46

18

46

46

f>6

46

46

46

46

46

46

46

46

16

-2.46 . -2.46 46

Continued on next page.

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440 N.Z. JOURNAL OF MARINE & FRESHWATER RESEARCH 12 (4), 1978

APPENDIX 1 — (Continued)

(A) (B) (c)S1/159231

(D) (R) (F)

•1*7

048

•It 9

•5Q

051

•52

PAKAbJAUr

PAKAWAU

WAIKATO

liJAIKATD

AUARDA BAY

•QNETAHLJTI BAY

33/099135

S3/1DZ125

33/091*09.7

S3/D9Z0BD

59/416801

S9/426770

070 RABBIT ISLAND 520/554283

• 7 1 TAHUWANUI BEACH S20/597287

072 TAHUNANLJI BEACH S2D/5BB287

BOULDER BANK

H 3 d

H ' d

051

055

056

D57

05B

•59

D60

061

062

063

064

065

066

067

0G8

D69

KAITERITERI

KINA

HINA-

RUBY BAY

RUBY BAY

RUBY BAY

RUBY BAY

MAPUA

flAPUA

RABBIT ISLAND

RABBIT ISLAND

RABBIT ISLAND

RABBIT ISLAND

RABBIT ISLAND

RABBIT ISLAND

RABBIT ISLAND

. S9/3975S7

S14A33411

S14A3540B

S14A54347

S14A56343

S14A61338.

514A66333

S14A67334

514A72329

S1I .A73321

SUA79322

•SHA93316

SU/505310

S14/51I.307

SHt/527303

S20/545293

H3r

Ul,f

U 1 f

H 3 r

H3r

H3r

H3r

H3r

H^d/r

H,r/d

H3d

H3d

H3d

• H 3 d

H 3 d

H , d

G

G/S

G/S

075 CENTENNIAL INN -PAEKAKARIrtI

G/S

G

1870-1923

1923-193B

'1953-1961*

1B95-19H

19U-1975

igitO-1975

1925-1975

19UD-1975

1850-1963

1850-1690

1890-1951*

195it-1963

18^*2-1888

1888-19i*2

191*1*-195U

1842-1930

1930-191* i*

1961-1975

1961-1975

1912-1945

1945-1964

1912-1964

1912-1964

1970-1975

1912-1961

1912-19S1

1923-1967

1923-1957

1923-1967

1923-1967

1923-1967

1923-1967

1923-1967

1967-1975

1923-1967

1850-1969

19^8-1971

1971-1975

1975-1977

1850-1943

1943-1944

1944-1950

1950-1954

1954-1956

1956-1957

1957-1958.

1958-1960

1924-1970

1894-1940

1940-1977

SURGE1 SEPTEMBER 11-13, 1976

-19

+ 1D

+57

-M30.

-15D

-10

-20

-100

+ 100

+00

+ 100

+20

+40

+t«D

+30

+50

0

-6

-3

0

-22

-26.2

-1.5.5

-10

-37.7

+81.7

-50

+37

0

-50

-84

-Z5

-380

+445

-73

-10

-32

+658

+43

+36

+26

+7

+23

+55.2

-12

-6

-1)

( H )

-0.36

+0.67

+2.19

21.0

-2.45

-0.3

-0.4

-2.88

+0.88

+2.0

+ 1.50

+2.22

+0.87

+0.74

+3.0

+0.57

0

-0.43

-0.21

0

-1.16

-0.5

-0.87

-2.D

-0.77

+ 1.67

-1.14

+0.84

0

+ 1.14

+0.23

-1.14

-1.91

-3.13

-8.64

+3.74

-3.17

-2.5

-13.33

+7.08

H35.83

+5.25

1-18.0

• 26 .0

+7.0

H1.5 •

+ 1.2

-0.26

-0.16

(0

+0.51

-6.BB

-0.3

-0.4

-2.ee

+0.68

+1.77

+0.96

+0.49

-0.43

-0.21

-0.42

-0.5

-0.87

-2.0

-D.77

+1.67

-1.14

+0.84

0

+1.14

+0.23

-1.14

-2.1

-B.64

+3.74

-3.93

+B.16

+1.2

-0.22

(I)

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GIBB—COASTAL EROSION AND ACCRETION 441

(A) (B) (C) (D) (E) (F) (G) (H) (i) ())

• 7fc PAEhAKARIKI N160/4B9576 H^t! G 1894-1897 - 7 -2.3 7G

1897-1906 -fc -0.67 70

1906-1926 -18 -0 .9 70

1926-1940 +21 +1.5 70

1940-1958 -5D -2.78 7D

195S-1977 D D -0.72 19

D77 PAEKAKARIKI N160/491579 H,d E 1926-1941 -9 -G.f 70

19*41-1963 Ci 0 . 70

1963-1977 0 D ' -D.18 19

1907 FIRST SUBDIVISION OF PAEKAKARIKI COAST 70

078 PAEKflKARIKI PARADE N160/4955B7 ROAD FILL 1907-1976 0 0 70

079

060

0 6 1

D82

D63

PROFILE 3

TRIG BEflCH

TRIG D

PROFILE 4

PROFILE

N160/5OO596

N156/506613

M15G/512624

l»156/50a6 ie

N156/513633

H3d S/G

(STORM SURGE SEPTEMBER

H3d G/S

H3d G/E

H3d G/5

(STORM SURGE SEPTEMBER

1976-1977

1S74-1968

1966-1977

1 1 - 1 3 , 1976

1874-1968

1874-196B

1874-1943

1943-1948

1948-1952

1952-1966

1966-1973

1973-1977

1874-1943

1943-194B

1948-1952

1952-1966

1966-1973

1973-1977

11-13 , 1976

-2

+48

- 1

- 1 )

+32

+ 17

+26

-13.8

+ 1.2

+4.4

-2.9

+3.D

0)

-5

-9.7

+3.9

-4.4

-10.£

-3.0

-2.5)

- 2

+0.51

-•.14

+0.34

+0.18

+0.36

-2.76

+0.3

+G.31

-D.41

+D.75

-0.07

-1.94

+0.9B

-D.31

-1.46

-0.75

-0.03

+0.46

+G.34

+0.1B

+0.17

-0.2B

19

70

19

19

70

70

70

1B

1B

16

18

18

19

7D

18

18

18

1B

18

19

19D6 FIRST SUBDIVISION OF RAUMRTI CDWST

PROFILE 6 N156/516649 H d S 1874-1880

1880-1920

1920-1968

1966-1977

(STORM SURGE SEPTEMBER 11-13, 1976

PROFILE 7 N156/518666 H3d S 1874-1680

1BBD-1943

1943-1952

1952-1958

1958-1977 -6 - 0 . 3 2 -0 .23

(STURM SURGE SEPTEMBER 11-13, 1976

PROFILE B N156/51B6B2 H d S 1B74-1BB0

1880-1905

1905-1952

1952-1958

1958-1966

196C-1973

1973-1977 +5.3 +1.33 +0.52

(STORM SURGC SEPTEMBER 11-13, 1976

Continued on next page.

- 5 0

+29

- 5

- 1 1

-11)

- 4 0

+35

+ 12.4

- 2 5

- 6

- 6 )

+40

+20

- 2 4

+ 2.2

+4.4

+5.2

+5.3

-4 )

-8.33

+0.73

-0 .10

-1 .22

-6.67

+D.56

+ 1.30

-4.17

-0 .32

+6.67

+0.B

-0 .51

+•.37

+0.55

+0.74

+ 1.33

Page 14: GIBB—COASTAL EROSION AND ACCRETION · 2019. 3. 24. · Coastal erosion is the process of removal of material at the shoreline which leads to loss of land as the shoreline retreats

442 N.Z.

APPENDIX 1 — (Continued)

(A) (B) (c)

087 PROFILE 9 N156/519694

088 PROFILE 10 N156/5Z370B

089 KENAKENA TRIG N156/527714

090 KENAKENA POINT N156/527714

091 PROFILE 11 N156/532717

092 PROFILE 12 N156/54B727

JOURNAL OF MARINE & FRESHWATER RESEARCH 12 (4), 1978

093 PROFILE 13 N157/556733

094 LJAIKANflE N157/5G3739

095 PROFILE 14 N157/5G9745

096 PRDFILE 15 N157/57B757

097 TRIG H N157/584765

098 PROFILE 16 N157/58977Z

(D) (E) (F) (G) ( H )

rSURGE SEPTEMBER

S

" 3 "

(STORM !

1B80-1905

1905-1968

! 11-13, 1976

1880-1905

1905-1968

(STORH SURGE SEPTEMBER 11-13, 1976

1920 FIRST

H3d S 1BB0-1B92

1892-1905

1905-1968

H d S 1877-1892

1892-1914

1914-1940

iaao-1968

I SURGE SEPTEHBER 11-13, 1976

H3d 5 1BB0-ia98

1898-1923

1923-19GB

1968-1977

(STORM SURGE SEPTEHBER 11-13, 1976

H3d S 1880-1898

1898-1923

1923-1948

1948-1968

1968-197S

1976-1977

(STORH SURGE SEPTEMBER 11-13, 1976

1923-19Z4 FIRST

H3d S 1880-1924

1924-1948

194B-1968

1968-1977

H3d S 1880-1898

189B-1957

1957-1968

1968-1977

(STORH SURGE SEPTEMBER 11-13, 1976

H3d S 1880-1908

19DB-1957

1957-1968

1968-1976

1976-1977

11-13, 1976

+143 +5.72

+52 +0.83 +2,

-4)

+119 +4.76

+52 +D.83 +1

-1)

SUBDIVISION OF PARAPARAUHU COAST

+22

+73

+96

+60

+60

+40

+ 171

-1)

+26

-40

+71

-a

-2)

+1.83

+5.62

+ 1.51

+4.0

+2.73

+1.54

+ 1.94

+1.44

- 1 . 6

+1.58

-0 .89

+2.54

+1.94

+121 +6.72

+32 +1.2B

+4 +0.1S

+24 +1.2

-B - 1 . 0

-2 - 2 . 0

-3)

SUBDIVISION OF UAIKANAE COAST

I SURGE SEPTEMBER

S

(STORM SURGE SEPTEHBER

iaao-i9oa

1908-1964

1964-1968

1968-1977

1914-1964

1964-1968

1968-1976

1976-1977

11-13, 1976

+ 116

+13

+45

-a

+120

+ 1B

-4)

+B0

+38

+51

-6

-2

-6)

+14

+34

+33

-B

+17

+17

-6

-Z

-6)

+2.64

+0.54

+2.25

-0.89

+6.67

+0.31

+1.64

+2.85

+0.77

+4.64

-0.75

-2.0

+0.5

+0.61

+8.25

-0.89

+0.34

+4.Z5

-0.75

-2.0

(I)

70

70

19

70

70

12

12

70

19

70

70

70

19

19

70

70

70

70

19

19

19

70

70

70

70

70

19

19

70

70

70

19

19

70

70

Page 15: GIBB—COASTAL EROSION AND ACCRETION · 2019. 3. 24. · Coastal erosion is the process of removal of material at the shoreline which leads to loss of land as the shoreline retreats

GIBB—COASTAL EROSION AND ACCRETION 443

(A)

D99

1D0

101

102

104

105

1D6

107

108

109

110

111

112

113

111.

115

116

117

11a

119

120

121

122

123

12k

125

126

127

126

(B)

TRIG T

TE HQRO

SIMS ROAD

SWAMP RDflO

DTAKI BEACH

•HYDERABAD• WRECK

UAITAREfiE BEACH

WAITARERE BEACH

MANAWflTU MOUTH NTH

FOXTUN dEACH

FOXTON BEACH

HIMATANGI

HIMATANGI

TANGIMOANA

' F U S I L I E R ' WRECK

KAITOKE BEACH

KAITOKE BEACH

UIANGAWUI AIRPDRT

STH UJflNGftNUI

CASTLECLIFF

K f l l IWI BEACH

DKEHU

MAXWELL

TRIG T

PATEfl

PATEA

POWER HOUSE RDAD

HANUTAHI ROAD

HANAUiAPOU

MANflUJAPQU

(c)N157/G08B08

N157/615S23

N157/6238<tO

N157/629855

N152/712092

N152/73D180

N152/73219B

N1<*5/736208

N11.B/737238

N14B/739253

N1W71.2290

NHtB/7fc732O

N1 £.8/71.831* 7

Nlt.3/702615

N138/566809

N13B/559816

N138/5D0823

•N137/53081.0

N137/511.B1.7

N137A1.0917

N137/l*1<*931

N137/39593B

N137/37991.2

N136/053053

N136/D50053

N129/985105

N129/95311.8

N129/93D18O

^129/922192

(D)

H , d

Hjd/r

H 3 r

H 3 p

H3p/d

H,d

H 3 d

H 3 d

H 3 d

MOUTH

H 3 d

H 3 d

H , d

H 3 d

H , d

H 3 d

H 3 d

H 3 d

H 3 d

H 3 d

H3d

Llm

Urn

him

H 3 d

H 3 d

Urn

Urn

him

LJm

(E)

S

G/S

G

G

S

5

S

S

MIGRATION N(+)

S

5

S

5

• S

S

s

s

5

s

s

s

s

s

s

s

5

s

s

S/G

S/G

(F)

1879-1918

1918-1968

1B79-1918

1918-1968

1918

1880-1968

1880-1968

1S7D-193D

1878-1975

181*2-1972

18<t2-1972

18i»2-1889

18B9-1962

AND S ( - )

18(42-1962

1889-1953

1889-1962

1889-1971

1889-191.3

1881*-1975

19<*D-1975

191*0-1975

191*0-1975

1379-1891.

1894-1921

1921-191*2

19U2-1962

1879-1891.

1891.-1921

1921-191*2

191.2-1962

1962-1970

1876-1893

1893-1916

191*2-1955

1953-1963

1963-1969

19D1.-1951.

1904-1951.

19Ql*-195l.

1872-1905

1905-1976

1872-19D5

1905-1939

1939-1976

19D1-1976

1fl7(*-1927

1B7t.-1953

1953-1976

191*0

1871*-1953

1953-1976

(G)

+ 19

+ 100

0

+G0

FIRST SUBDIVISION OF

+67

+67

+ 2 0

+350

+1.60

+1720N

-32005

+70

0

+300

+50

+20

+90

-70 .

- 5 6

- 5 0

- 6 0

-6Q

-120

+ 9 0

+50

+ 100

+200

+ 100

+ 10

- 2 5 . 5

-9.9

-7.6

-U.G

- < • .

-16

-20

-36

+6D

-60

-32

+59

+76

- l *

- 2 2

-1.8

- 2 D

EXTRACTION OF 1V,000i

-1.2

-23

( H )

+0.66

+2.0

+ 1.2

TE HOflO COAST

+0.76

+0.76

+0.26

+2.69

+3.5t.

36.6

-1*3.81.

+0.5B

0

+1..11

+•.61

+0.37

+ 1.0

- 2 . 0

-1 .6

-1.1*3

-1..0

-2.22

-5.1.5

+1*.5

+3.33

+3.70

+9.09

+5.00

•+1.25

-1.5

-0.1.3

-0.69

-0.1.6

-0.69

-0.32

-O.l*

-0.72

+ 1.82

-0.85

- 1 . 0

• 1.71*

+2.D5

-0.05

-0.1*2

-0.61

-0.87

TI GRfWEL

- 0 . 5 3

- 1 . 0

( i )

+ 1.31*

+0.67

+0.67

+0.76

+1 .0

+0.26

+2.69

+ 3.51.

12.333

+0.5B

0

+l*.11

+0.61

+0.37

+ 1.0

-2 .0

-1 .6

-1.1*3

-1.81

+5.05

-D.56

-0.32

-0 .1 .

-0.72

0

+0.99

-0.05

-0.1.2

-0.67

- -0.61.

Continued on

( f )

70

70

7D

70

70

70

70

12

19

70

70

31

70

31

1*2

U2

1*2

1.2

19

19

19

19

1*1

1.1

t*\

<*1

7

7

7

7

7

1d

14

7

7

7

70

70

70

67

19

67

67

19

67

67

67

19

66

67

19

next page

Page 16: GIBB—COASTAL EROSION AND ACCRETION · 2019. 3. 24. · Coastal erosion is the process of removal of material at the shoreline which leads to loss of land as the shoreline retreats

444

APPENDIX 1 — (Continued)

(A) (B) (c)

N.Z. JOURNAL OF MARINE & FRESHWATER RESEARCH 12 (4), 1978

129

1 3 0

131

132

133

134

135

lib

137

138

139

140

1H 1

142

143

144

145

146

147

148

149

150

151

SIGGB TRIE

HMJR0T0 ROftD

OH AWE BEACH

LHAWE BEACH

RAINE ROAD

WINKS TRIG

NORMANBV RDAD

GLEN ROAD

PIHAMA

PUNEBU

GANUI

LJAITAHA

Tli-LiKA

TIPQKA TRIG M

LJAREA RIVER

STENT RDAD

STENT ROAD

LEITH RDAD

AMU AHU ROAD

GAKURA

0AI1URA

HAREKALuE STREAM

i\IELJ PLYMOUTH

N129/B64234

N129/796267

N129/778275

N129/773277

N129/764277

(1129/723264

N129/676288

K1Z9/655294

W128/496372

N123A93377

N118/3B2505

N11B/360597

rMHB/358604

N11B/35661O

N118/69B372

N106/370703

N1D8/372710

(M10B/463813

l\J10B/51684Z

!M10B/525a43

N10B/531B45

N10B/59B9D5

N109/S58927

15?

153

151.

155

156

157

15B

PUKETAPU TRIG N109/730972

(D)

NEW PLYMDUTH N109/661.926 H^d

FITZROY BEACH N109/66S929 H^d

FITZRQV BEACH N109/672933 H3d

FIIZROY BEACH N109/675937 Hjd

FITZROV BEACH B1D9/679942 H3d

BELL BLOCK N109/71Q966 H3d

UILLS ROAD N 109/721.967 H j

(E)

G/S

G/S

E/S

G/S

G/S

G/S

G/S

S/G

S/G

S

S/G

G/S

(F) (G) ( H ) ( I )

19QB-195S

1902-1930

1871-1966

1871-1959

1959-1966

1940-1976

1945-196D

1872-1976

1879-1930

1912-1947

1920-1876

1920-1976

1881-1950

1BB0-1937

1937-1959

1880-1937

1937-1959

1880-1937

1937-1959

1B81-1953

1881-1953

1881-1953

1892-1975

1865-1961

1865-1961

1865-1961

1925-1975

1842-1901

1901-1921

1921-1944

1944

1842-1921

1842-1958

1B42-195B

1B42-195B

1842-195B

1881-1687

1907-1974

1B52-1945

1945-1950

1950-1957

1957-1970

1970-1976

1917-1945

1945-1950

1950-1957

1957-1964

1964-1970

1970-1976

- 3 0

- 9

- 6 0

- 5 1

- 9

- 4 0

EXTRACTION OF 36,6DOm

35

- B

0

0

-5

D

+ 4 0

+50

+42

- 2 0

+22

- 1 2

+ 14

+20

+ 10

0

+20

+ 6 4

+ 3 2

D

- 1 D

- 1 0

- 9

SEAWALL BUILT, CLIFFS

- 8 6

- 6 8

- 6 7

-100

+9

NEW PLYMOUTH HARBOUR

- 2 8

- 2 3 . 5

- 1 1 . 9

a

-9 .D2

- 0 . 9 2

-20.0

-12.3

0

-9.6

-2.7

-0.44

-0.6

-0.32

-•.63

-0 .58

-1 .29

-1 .11

5 GRAVEL

-0.34

-0.16

D

•-D.09

D

+0.70

+2.27

+0.74

-0 .91

+0.39

-0.55

+0.19

+0.28

+0.14

0

+0.21

+0.67

+0.33

0

-0 .17

-D.5

-0.39

STABILISED

-1.09

-D.59

-0 .58

-D.86

+0.D8

BREAKWATER

-0.42

-D.25

-2.38

D

-0.69

-D.15

-D.71

-2.5

a-1.37

-0.41

-0.07

-0.60

-0.32

-0.63

-0.63

-1.11

-0.34

-0.16

D

D

-0.09

a

+ 1.14

+D.2B

+0.13

+0.19

+0.28

+0.14

0

+0.21

+0.67

+0.33

D

-0.2B

-1.09

-0.59

-D.58

-0.86

' +0.08

BUILT

-0.42

-0.37

-a .76

160 AIRPORT

161 fllRPDrU

N109/7429B2

N1D9/747990

G/S

E/5

1937-194B GRAVEL EXTRACTION WILLS RDAD TO PUKETAPU

1917-1964 -45 -0 .96 -0.96

1917-1964 -15 -D.32 -0.32

( J )67

67

67

25

39

67

67

67

67

67

67

67

67

S7

67

67

6''

67

67

30

67

67

67

10

67

Page 17: GIBB—COASTAL EROSION AND ACCRETION · 2019. 3. 24. · Coastal erosion is the process of removal of material at the shoreline which leads to loss of land as the shoreline retreats

GIBB—COASTAL EROSION AND ACCRETION 445

(A)

16Z

163

16".

165

166

167

163

169

170

171

172

173

171.

175

176

177

17B

179

1 8 0

181

182

183

(B)

itiAITARA

DTARADA RDAO

5TH ONAERO

STH ONAERD

NTH ONAERO

NTH ONAERO

URENUI

BROWN TRIG

OLD NTH ROAO

OLD NTH ROAD

CARRS RDAO

CARRS ROAD

H I M ! TRIG

PUHEARUHE ROAD

PARIQKARIWA POINT

MONUMENT

PARININIHI TRIG

UHITE CLIFFS

RAPANUI STREAM

MOHAKATINO

MOHAKATINO

MANUKAU BARRIER

(c)N99/BDOO06.

N99/B350D5

N1D9/91D000

N99/9210D3

N99/927QO3

N99/934004

N99/951006

N99/968D17

N99/976D2".

N99/983D30

N99/987033 . •

N99/99DO37

N99/999O47

N99/045110

N99/061123

N99/070126

N99/D95151

N100/118191

N1OD/135238

N91/150305

N91/151313

N46.098258

(D)

H , d

H , d

TtH/ST.-S/ST.

Tt

M/ST.-S/ST.

TtH/9T.-S/ST.

Tt

H/ST.-S/ST.

H 3 .

TtM/ST.-5/St.

Tt

M/ST.-S/ST.

TtH/ST.-S/ST.

TtH/ST.-S/ST.

TtH/ST.-S/ST.

TtH/ST.-S/ST.

TtH/ST.-S/ST.

TtH/ST.-S/ST.

TtM/ST.-S/ST.

TtH/ST.-S/ST.

Tt

M/ST.-S/ST.

TtH/ST.-S/ST.

TtH/ST.-S/ST.

TtH/ST.-S/ST.

H , d

(E

S / B

S / E

S

s

s

s

S/G

5

S

s

s

s

s

s

s

s

s

s

s

s

5

s

181* MANUKAU BARRIER NW0B2291

1fl5 MANUKAU BARRIER NUS/D77300

186 MflNUKflU BARRIER NW065330

187 MANUKAU BARRIER

188 WHATIPU

1913-195Q

1919-1975

1SSZ-1937

1882-1931

1883-1955

1883-195B

1970-1975

1B83-195B

1883-1960

1883-1990

1883-1975

1683-1975

1880-1975

1866-19flB

1955-1975

1937-1969

1S53-1919

1919-1969

'1853-1919

1919-1969

1853-1919

1919-1969

1853-1919

1919-1959

1853-1919

1919-1969

18£»t*-1853

1953-1890

1890-1910

1910-1919

1919-1930

1930-19140

19£.0-195<t

19514-1960

1960-1968

196B-197*t

(G)

-13Q

-2t

-30

-fi

-liO

-80

-30

0

-17.5

,-12.5

-21..0

-30.0

-36

-30

-10

-12

(H) (I)

+110

-<.DS

+120

-381.

+336

-61".

+&72

-960

0

+280

a-180

-100

+500

+710

+20

+10

+80

-2.89

-0.&3

-0.35

-0.1Z

-0.53

-1.D7

-6.0

a

-0.23

-0.16

-1.26

-0.33

-0.38

-D.29

-0.5

-0.38

-1 .BS,

-2 .a

-0.11

-0.5

-D.09

+ 1.7".

-"..8

+ 1.67

-8.16

+ 1.82

-7.68

+5.09

12.28

10.18

19.2

-2.89

-0.1.3

-0.55

-0.12

-0.53

-1.07

-6.D

0

-D.23

-0.16

-0.26

-0.33

-0.38

-0.29

-0.5

-0.38

-1.89

-2.0

-0.11

-0.5

-0.09

-1.08

-2.57

-2.28

-2.40

-2.1.8

67

67

67

67

S7

19

67

67

67

S7

67

67

67

J

67

67

67

31

31

31

31

31

31

31

31

2a. •

-9.09

5D.D

50.71

+3.33

+ 1.25

13.33 +10.15

Continued on

31

42

42

1.2

42

42

42

next page

Page 18: GIBB—COASTAL EROSION AND ACCRETION · 2019. 3. 24. · Coastal erosion is the process of removal of material at the shoreline which leads to loss of land as the shoreline retreats

446

APPENDIX 1 — (Continued)

(A) (B) (c)

N.Z. JOURNAL OF MARINE & FRESHWATER RESEARCH 12 (4), 1978

19D

191

192

MURIUIAI BEACH N41/951616

MURIUIAI BEACH N41/94364B

STH KAIPARA HEAD N33/6B8042

PAPAKAMJI SPIT 1133/744110

N33/65715S

NTH KAIPARA HEAD N32/5B3146

KAIPflRA HEADLIGHTHOUSE

NTH KAIPARA HEAD N32/550159

197

198

199

20Q

NTH KAIPARABARRIER

BAVLYB BEACH

TE iilAEUIAE BAY

TE WAEiilAE BAY

N27/500350

N23/263685

S175/692263

S175/696261

TE UIAEWAE BAY

TE WAEWAE BBV

TE WAEWAE BAY

S175/736237

S175/752224

S175/757212

205

206

207

208

2D9

21Q

211

2 1 2

213

21*.

215

DREPUKI

KAWAKAPUTA BAY

COLflC BAY

RIUERTDN

RIUERTON

FERRY ROAD

ORETI BEACH

ORETI BEACH

ORETI BEACH

TDETOES BAY

TRIG A

5175/817125

S176/920Q1.7

S176/996D65

S176/076071

S176/100089

5176/223033

S181/Zl»99fl8

S181/27093B

5182/280916

S1B2/1.83777

S182/5077B5

(D)

" 3 "

H3d

H,d

V

(E)

s

S/G

G/S

S/E

S/G

(F)1B*i<i-1890

169D-191D

1910-1919

1919-191*0

191.0-1960

1960-1968

1968-197i.

1971-1975

1971-1975

1852-1926

1926-1966

1652-1926

1926~19<.2

igiiZ-1952

1952-1966

1926-1960

1652-1879

1679-1926

1926-191.3

191*3-1960

1652-1926

1926-191.3

191.3-19G0

1962-1972

1915-1976

1689-1963

1889-19D1

1901-1926

1926-1963

1963-1976

191*6-1963

1963-1976

1946-19G3

19G3-1976

191.6-1963

1963-1976

1976-1977

1 Bfl£.-1926

1928-1977

1909-1969

1881.-1963

1881-1963

1658-1966

1656-1966

1863-1963

1926-1963

1907-1963

1907-1963

1888-1969

1686-19^7

(G)

+360

D

-2D

0

-5D

-20

-772

+ 1235

+309

+B75

+663

+ 160

-250

-772

-1111

-617

-2<*7

+586

+926

+ 123

+ 15

-60

0

+24

+70

+24

0

-17

-35

-20

-in

o

• 30

0

+200

+25D

(H)

0

+2.0

+2.B

+0.65

0

-1.0

-2.69

-1.18

-3.OB

-D.29

• D.38

• 10.0

D

(0

+3.D

40. D

0

12.5

-5.0

10.43

3D.8B

+4.18

54.69

66.3

11.43

-7.35

28.59

23.Sit

36.29

14.53

+7.92

54.45

+7.24

+1.5

+6.38

-12.5

-5.0

+4.06

+17.61

-7.35

-25.44

+15.14

+ 1.5

+0.25

+0.67

+0.28

0

+0.6

+ 1.35

+3.57

+k.UG

+0.06

-D.51

+0.25

+0.67

+0.28

D

+0.8

+1.35

+3.57

• d.l.6

+D.06

-0.51

(I)42

42

31

42

42

42

42

3

3

72

72

64

64

64

£4

64

Page 19: GIBB—COASTAL EROSION AND ACCRETION · 2019. 3. 24. · Coastal erosion is the process of removal of material at the shoreline which leads to loss of land as the shoreline retreats

GIBB—COASTAL EROSION AND ACCRETION 447

(A) <;B)

216 UIAITUNA TRIG

217 TDETGES BAY

?1B TDETDE5 BAY

(c) (D)

S1B2/632831 H3r

E182/703830 H3d

51B2/733821 H,d

(E) (F )

18B9-19D6

1906-1966

1875-1928

1928-1965

192B-1952

1952-1969

(G)

- 1 D

-zu

- 2 6

+ 6 8

+1.0

( H )

- • . 5 9

-D-fc

-0 .53

+ 1.81.

+ 1.67

+2.35

( I ) (I)

61.

219 UAIPAPA

221 HAIDANE HAV

222 PDRPOISE BAY

223 PORPUISE BAY

22*. P0RPGI5E BAV

225

239

21.0

21.1

UAIPATI BEACH

226 WAIPATI BEACH

227 TAHAKDPfl BAV

:Z6 TAHAKOPA BAY

229 CATLIN5

S1B3/B13731* H,d

S1B3/B56731* H,,d

5183/950732 .

5183/995731.

B1H3/DQ175*i H,d

S1B1*/3O9B62

S1flt./323667

S18t./50G967

516^/518972

S179/5571Q0

5179/572122

S179/59011.2

b179/611155

5179/630165

MGLYNLLX BAY

MDIYNEUX BAY

MGLYNELJX BAV

MOLYiMtUX BA/

MQLYNEUX HAV

ALLANS BEACH

WICKLIFFt BAY

PIPIKARETU BEACH S16V357SD1.

PENGUIN BEACH S16l*/35i.82O

PURAKANLJI BAY 5161./252B78

HARRINGTON

UAIKOUAITI

LIAIKOUAITI

KAKANUI

OAMARU

5155/232906

S155/295033

5155/302037

S136A85551*

5136/51.1*653

5

S

S

5

5

S

S

5

S

E

S

S

s

s

S/G

S/G

5 / G

S/G

S

S

s

s

5

5

S

S

i

r

1868-1935

1935-191.6

191.8-1967

1888-1935

1935-191.6 •

191.8-1967

1891.-1967

1891.-191.8

1891.-1958

1958-1977

1B9li-19lt8

191.8-1977

1B97-1967

1897-1967

1691.-1967

1891.-1967

1BB9-1933

1933-1967

1865-1891

1891-191.6

191.8-1951

1951-1975

1975-1977

1B91-191.6

191.8-1951

1951-1975

181.7-1962

1962-1977

161.7-1962

1B1.7-1962

181.7-1962

181.7-1962

1939-1969

1B67-1BB8

1888-1952

1952-1972

1876-1972

1867-1972

1891-1975

1862-1968

1B61-1968

1861-1968

1957-1977

186D-1971

- 3 8

+ 6 5

- 3 0

- 6 6

+170

- 3 0

+ 5 0

+ 6 0

+21.

+ 16

+ 6 0

0

+ 5 0

- 7 0

+357

+ 153

- 6 D

0

0

-360

+ 109

-131.

- 8 5

+ 119

- 1 3

+6

0

- 8 0

+380

+290

+ 145

+ 7 0

+300

-166

- 3

+ 6 3

+239

+ 133

+1.35

+3D

+ 20

+ 11.

-100

+ 6 3

-0.81

+5.0

-1.58

-H.D

+13.08

-1.58

+0.68

+ 1.11

+0.38

+0.8!*

+ 1 .11

D

+0.71

-1 .0

+3.81.

+ 1.61.

-1.36

0

n

-6.32

+36.33

-5.58

-1.2.5

+2.09

-1..33

+0.25

0

-5.33

+3.30

+2.52

+ 1.26

+ • .61

+ 10.0

-7 .9

-0.05

+3.15

+2.28

+ 1.27

+5.16

+0.28

+0.19

+0.13

-5 .0

+0.56

-O.Dl.

+0.91*

+0.68

+ 1.11

+0.1.8

+0.72

+0.71

-1 .0

+3-61*

+ 1.61.

-0.77

-1..20

+1.33 .

-0 .62

+3.30

+2.52

+ 1.26

+0.61

+ 10.G

-1.D1

+2.28

+1.27

+5.16

+0.2B

+•.19

+0.13

-5.0

+0.56

61.

61.

1 6

61.

Si*

1 8

6k

6k

ek

19

61.

19

51

5 1

5 1

5 1

5 1

5 1

5 1

5 1

16

1 8

19

5 1

18

1 8

5 1

19

5 1

5 1

5 1

51

1.2

5 1

5 1

5 1

5 1

5 1

5 1

5 1

5 1

5 1

15

51

Continued on next page.

Page 20: GIBB—COASTAL EROSION AND ACCRETION · 2019. 3. 24. · Coastal erosion is the process of removal of material at the shoreline which leads to loss of land as the shoreline retreats

448APPENDIX 1 — (Continued)

(A) (B) (c)

N.Z. JOURNAL OF MARINE & FRESHWATER RESEARCH 12 (4), 1978

(E) (F) (G) (H)

1B61-1939

1939-1945

1945-1954

1954-1959

1955-1961*

1964-1967

1967-1970

1970-1971

1871-1973

1973-1971.

1974-1976

-50.9

- a . 5

- 2 . 1

- 2 . 1

-D .3

-a .3

-0.3

-0.3

-0.4

-D.7

-1.5

-0.65

-1.42

-a.23

-0.1.2

-0.D6

-D.10

-• .10

-••18

-n.29

-0.1.7

-1.07

(I) (I)

"249 STH liJAITAKI FAN 5137/615732

• 250 STH WAITAKI FAN S137/65D775

251 STH UAITAKI FAN S128/671B03

252 STH UAITAKI FAN S12B/683828

253 NTH WAITflKI FAN S128/7Q690D

254 NTH UAITAKI FAN S128/714939

H 2 a

H,a

1861-1939

1939-1945

1945-1954

1954-1959

1959-1964

1964-1967

1967-1970

1970-1971

1971-1973

1973-1974

1974-1976

1955-1972

1955-1972

1943-1969

1943-1969

1943-1969H z . G

(STORMS JUNE 13, AUGUST 2 , 1974

H^a G 1943-1969

255

2 5 6

2 5 7

258

259

2 6 0

2 6 1

2 6 2

263

2 6 4

265

2 6 6

2 6 7

2 68

NTH lilAITAKI FAN

NTH lilAITAKI FAN

U1AIHA0 RIVER

WAINONG

MAKIKIHI

ST ANDREWS

PATITI POINT

TIMARU

TIMARU •

CAROLINE BAY

BENVENUE

WASHDYKE

SEAFORTH

STH OPIHI

S12S/717975

S128/718005

S128/717059

5119/709189

S119/706231

S119/734354

S111/796495

5111/792503

5111/793513

S111/782524

S111/778534

S111/793563

S111/816595

S111/850635

H 2 a

H 2 a

H 3 r

H ? b

H 3 r

H2a

(STORMS

H 3 r

H j r

H , r

H 3 d

H , r

H , b

H3r/.

H^r/e

G

0

G

G

G

G

JUNE 18, AUGUST

G/S

G/S

G/S

5

G/S

G/S

G/S

G/S

1943-1969

1974-1977

19U3-1969

1899-1953

1958-1963

1953-1977

1953-1977

1877-1957

1957-1963

2, 1974

1879-1967

1S79-1967

1879-1967

1879-1967

1879-1967

1865-1934

1934-1956

1956-1967

1967-1973

1865-1932

1932-1967

1967-1977

1670-195S

1967-1977

-35.7

-8.2

-9.2

-3.4

-0.6

-•-3

-D.fi

-•-3

-0.2

-1.4

-0.6

-9.9

-32.5

-39.9

-20.9

-37.9

-6.0)

-45.5

-34.6

-7.3

-9.7

-27.1

-18.3

-6.8

-4.6

-20.1

-5.5

-6.0)

-80

+150

+5DQ

+300

-375

-170

-126.6

-33.3

-12.6

-100

-140

-80

-121

-40

a.46

1.37

0.91

0.66

0.12

a . i a

• .20

0.18

0.14

0.93

0.43

0.59

1.97

1.55

• .81

1.47

1.76

1.34

2.59

• .33

0.46

3.66

0.38

a.20

G.25

0 . 5

• .91

1.70

5.68

3.41

4.26

2.46

5.75

3.03

2.10

1.49

4 . 0

8 . 0

1.37

4 . 0

-0.50

-0.59

-1.97

-1.55

-0.81

-1.47

-1.76

-1.24

-0.38

-0.63

-0.38

-•.20

-0.28

-0.91

+ 1.70

+5.63

+3.41

-4.26

-3.17

-3.21

-1.6?

13

13

3

13

10

I.Z

13

Page 21: GIBB—COASTAL EROSION AND ACCRETION · 2019. 3. 24. · Coastal erosion is the process of removal of material at the shoreline which leads to loss of land as the shoreline retreats

GIBB—COASTAL EROSION AND ACCRETION 449

(A) (B) (C) (D)

269 BRDUINS 9EACH 5111/905688 H,r/o

270 NTH DRARI S102/947726 H,,

272 NTH RANGITATA 51Q3/D4579S H-i

273 BEACH ROAD S103/077822 H

274 TUENTYONE ROAD S103/110844 H^

(E)

G/5

G/S

G/S

G/S

G/S

G/S

(F)

1670-1958

1967-1977

1900-1958

1939-1967

1939-19S7

1939-1961

1961-1977

1939-1965

1939-1965

(G)

-60

-40

-5D

-9.7

-8.6

-6.D

-7.D

-19.1

-23.7

(H)

-0.G8

-4.0

-D.86

-0.35

-0.31

-0.27

-D.<*4

-0.73

-0.91

(i)

-D.G5

-0.31

-0.3k

-0.73

-D.91

(I)41]

13

to

ia

10

275

276

277

27B

279

2 8 0

282

283

284

285

2B6

2B7

2B8

289

2 9 0

2 9 1

292

293

294

295

296

297

298

299

3GD

301

302

3C3

304

3D5

306

307

NTH HINDS

TANSEY'S HDAD

STH ASHBURTDN

NTH ASHajRTON

bJAKANUI

SEAUIElil

CORBETTS ROAD-

KYLE ROAD

MAINWARING'S ROAD

STH RAKAIA

RAKAIA ROAD

McEUEDYS ROAD

McEUEDYS ROAD

TAUWJTU

BIHDLINGS FLAT

OHAINS BAY

SUMNER

CLIFTON

SDUTHSHORE

OARO BEACH

OARO BEACH

STH KAIKOURA

STH KAIKQURA

STH KAIKDURA

STH KAIKOURA

5TH KAIKOURA

KAIKOURA PENINSULA

KAIKOUHA PENIN5ULA

KAIKDURA PENINSULA

NTH KAIKOURA

NTH KAIKOURA

NTH HAIKQ'JRA

S1D3/145B65

S103/198B95

5103/255925

S103/285943

S1O3/32796B

S103/363989

S92A43035

S93/47J052

S93/537083

593/603110

593/665134

S93/703151

S93/703151

S93/752163

594/067201

S85/375356

564/114514

SBV108518

S84/105535

S56/8057B6

556/806793

549/890885

S49/902690

S49/9S789B

S49/950902

549/963B9D

S49/972875

349/588883

S49/985BW

S49/972SG2

549/969950

SW9B79B0

H 2 a

H 2 »

H 2 .

V

H I

H 2 .

H 2 .

!VH 3 r

H 3 r

H 3 r

H 3 r

H3r/d

H 3 d

H 3 d

H 3 d

H , d

H 3 d

H 3 d

H3d/r

H3d/r

H3d/r

H3d/t

H-,d/r

LS/ST.-M/ST.

H 3 r

H 3 r

H 3 r

H 3 r

H . r

G/S

G/S

G/5

G / 5

G/S

G/S

G/S

G/S

G/S

G/S

G/S

G

G

G

G

G/S

S

s

5

S

5

S

G/S

G/S

G/F

G/S

G/S

G

G

G

E/G

G/S

G/S

1939-1965

1941-1965

1941-1965

1941-1976

1942-1976

1942-1976

1Q4 ? 19*?fi

1942-1976

1942-1976

1942-1976

1942-1976

1943-1975

1943-1975

1931-1945

1945-1962

1962-1965

1965-1967

1943-1975

1862-1952

1952-1966

1870-1970

1928-1930

1930-1950

1950-1977

1849-1928

1928-1930

1930-1936

1936-1950

1950-1977

1920-1963

1942-1974

1942-1974

1942-1974

1942-1974

1942-1974

1942-1974

1942-1974

1942-1974

1942-1974

1942-1974

1942-1574

19L,2_ig74

1942-1974

-6 .0

-13.1

-9 .1

-23.8

-28.6

-23.3

-11.4

-14.6

-21.2

+ 12.1

-21.0

-66.6

-0.64

-15.5

-1.5

-3 .1

-98.3

+5Q

0

+23D

+ 18

+20

- 4 0

D

+110

+ 12

+ 152

-116

+ 120

+ 18.3

+3.7

+25.0

+ 15.2

-2.4

13.8

15.2

-1D.7

-3.1

-15.2

-11.3

+?7.5

+ 11.3

-0.23

-0.55

-0.3S

-0.6B

-0.84

-0.69

-1.36

-0.34

-0.43

-0.62

+0.36

-0.66

-2.OB

-0.D5

-0.91

-0.51

-1.53

-3.07

+0.56

0

+2.3

+9.0

+1.D

-1.48

0

+55.0

+2.0

+10.86

-4.3

+2.79

+0.59

+0.12

+D.S1

+0.49

+0.D8

+0.45

+G.4B

-0.33

-0.10

-D.47

-n.35

+0.09

+0.35

-0.23

-0.55

-0.38

-0.68

-0.64

-0.69

-0.34

-0.43

-D.62

+0.36

-0.66

-2.08

-0.5S

-3.07

+0.46

+2.3

-0.04

+ 1.23

+2.79

+0.59

+0.12

+0.81

+0.49

+0.08

+D.45

+0.46

-0.33

-0.10

-0.47

-0.35

+ •.69

+D.35

18

1B

16

1B

1S

18

18

18

18

18

18

18

33

33

33

33

18

4

4

11

52

52

49

52

52

52

52

19

6

34

34

34

34

34

34

34

34

34

34

34

34

34

Continued on next page.

Page 22: GIBB—COASTAL EROSION AND ACCRETION · 2019. 3. 24. · Coastal erosion is the process of removal of material at the shoreline which leads to loss of land as the shoreline retreats

450 N.Z.APPENDIX 1 — (Continued)

JOURNAL OF MARINE & FRESHWATER RESEARCH 12 (4), 1978

(A) (B) (c) (D)

3 0 8

3D9

31D

3 1 1

3 1 2

313

315

3 1 6

3 1 7

318

319

320

321

3 2 2

323

324

NTH HAIKOURA

HAPUKU

HAPUKU

MANGAMAUNU

HUE-TE-TAKAPENINSULA

PALMER HEAO

PETDNE BEACH

PENGARROW

PENCARROtil

KOHANGAPIHIPIRI

KOHANGATERA

FITZROV BAY

BARING HEAP

UA1NUIDMATA

ORONGDRONGO

DRDNGDRONGO

TURAKIRAE HEAD

SI»9/0D5995

S49/D27013

S't9/Q3102'*

S49/0290I.1

• 1H/3H1M

N164/378T.8

" * / u w

N164A07138

N164A05129

N164A12122

N164A18110

N164/424106

N164/426068

N164A38064

N164/446061

N164/455055

N164/464038

H3r

H,r

H3r

H3r

H3r

H , r

H 3 d

H 3 r

H , r

H 3 r

H 3 r

H 3 r / d

H 3 r

H , r

H 3 r

H 3 r

K 0

339 ORUI N163/5i.9515

3UD CASTLEPOINT N159/6S7SB7

341 CAPE TURNAGAIN W155/02617B

3kZ CAPE TURNAGAIN N155/0351B1

343 CAPE TURNAGAIN N155/043187

3Uk CAPE TURNAGAIN N151/0£t5216

(F.)

G/S

G

G

G

G

G

S/G

(F)

325

326

327

328

329

3 3 0

3 3 1

3 3 2

333

334

335

336

337

338

NGAPDTIKI

NGAPDTIKI

NGAPOTIKI

UHITE ROCK

WHITE ROCK

TE KAUKAU POINT

TE KAUKAU POINT

TE KAUKAU POINT

GLENBURN

FLAT POINT

KAIUHATA RIUER

HOMEWOOD

HOMElilOOD

RIUERSDALE BEACH

N16B/871859

N16B/867858

N168/B63853

N16B/915B80

N168/925880

N16B/939874

N168/940877

N16B/943B78

N166/336207

N166/424270

N163/45133D

N163/463361

N163/4B63B3

N168/525455

H 3 r

H 3 .

H3a/r

VH 3 r

Hh-DtS/ST.-M/ST.

Mh-DtS/ST.-M/ST.

Mh-DtS/ST.-M/ST.

H,r/d

H 3 d

H , a

SM/ST.

SM/ST.

H , d

G

G

G

G/S

G/S

G

G

G

S

S

G

G/S

G/S

S

H3s/r

P

M/ST.

WaM/ST.

IllD

M/ST.

M/ST.

191*2-19714

191.2-1971*

1942-1974

1914 2-1971*

1855-191+7

1855-191*7

181*0-1956

1855

1S55-191.1

191.1-1971*

1655-191.1

191*1-1971.

1855-191.1

191*1-1974

1855-1956

1855-191.1

191.1-1971.

1B55-19I.1

191.1-1971.

191+1-1971+

1B55-1941

191.1-1971.

1855-191.1

191+1-1971.

1855-1975

1855

191+I+-1973

191+4-1973

191+1.-1973

191+1.-1973

194I+-1973

191*1.-1973

191.1*-1973

191.1.-1973

1971.-1977

1927-1967

1962-1977

1957-1977

1957-1977

1903-1953

1953-1972

1972-1971*

1970-1977

1962-1977

191.3-1975

191*3-1975

191*3-1975

191.3-1975

(G)

+1.0.9

+30.5

+ 18.3

-5.2

+15

+ 100

+270

EARTHQUAKE ADVANCED

• 13

+6

+ 15

• 18.5

+1.

•52

-30

-15

+37

EARTHQUAKE UPLIFT 2,

-269.3

- 9 8 . 7

-22 .3

- 2 0 . 1

- 2 0 . 7

-12 .2

-6.9

-10

-ma

-1*0

-2B

-2

+52

-35

-17

-1.0

-'..6

-6D

-72

-2<*

-52

(H)

+ 1.32

+0.98

+0.59

-0.17

+0.16

+1.09

+2.33

SHORELINE 30-

+0.15

•D.18

+0.10

+1.18

+0.06

+2.33

+0.15

+0.22

•0.12

•0.60

-0.91

-0.1*5

+0.32

+0.77

•0.11.

0

+0.31

45m ABOUE HHU

- 9 . 4 5

- 3 . 4 6

-0.79

-0.71

-0.73

-0.43

-D.21.

-0.26

-3.33

-2.5

-2.67

-2.0

-0.1

U)+1.3Z

+a.9fl

• 0.59

-0.17

•0.16

+1.09

+2.33

+0.69

•0.15

+0.18

-0,45

+0.10

+0.31

-9.45

-3.46

-0.79

-0.71

-0.73

-0.43

-0.24

-0.26

-3.33

-2.67

-2.0

+1.06

-1.84

-a .5

-5.7

-0.31

-1.88

- 2 . 2 5

-0 .75

-1 .63

0

5

-D

-1

-2

-0

- 1

i 7

.31

.SB

.25

.75

.63

(r)34

34

34

21

21

21

69

69

69

3

3

Page 23: GIBB—COASTAL EROSION AND ACCRETION · 2019. 3. 24. · Coastal erosion is the process of removal of material at the shoreline which leads to loss of land as the shoreline retreats

GIBB—COASTAL EROSION AND ACCRETION 451

(0 (B) (c) (D) (E) (F) (c) (H) ( I ) (I)345 CAPE TURNAGAIN N151/049230 Wo

H/ST.

31.6

31.7

31.8

3 4 9

3 5 0

3 5 1

352

353

354

355

356

357

358

359

360

361

362

363

J3G4

CAPE TURNAGAIN

WHANGAEHU

UHANGAEHU

UAIMARAMA

WAIMARAMA

UJAIMARAMA

WAIMARAMA

UAIMARAMA

UAIMARAMA

HAUPOURI

KIDNAPPERS

KIDNAPPERS

KIDNAPPERS

CLIFTON

CLIFTON ROAD

TE AWANGA

EAST ROAD

HAUMOANA

OUTFALL

N151/041243

N151/D41256

N151/048272

N142/4D59B1

N142/403983

N142/402987

N142/400991

N142/406977

N142/40002O

N135/467159

N135/455205

N135/438199

N135/419208

N135/41D210

N135/411210

N135/388221

N135/36924O

N135/361Z56

N135/353276

UoM/ST.

TM/ST.

TM/ST.

Mt( I )K/ST.

H , d

H 3 d

H 3 d

Mh+Mt(I)M/ST.-S/ST.

H 3 d

PmM/ST.

CONGL.

U 2 n

CONGL.

Hpl»

CONGL.

H , r

H 3 r

H 3 r

H , r

H 3 r

H 3 r -

G

G/S '

G/S

G

G/S

G/S

5

G-CONGL.

S

-

G/S

G/S

G/S

G

G

G

G

G

G

1943-1975

1943-1975

1943-1975

1937-1952

1952. -972

1972-1976

1937-1952

1952-1972

1972-1976

1976-1977

1965 COflSTAL

1937-1952

1952-1972

1972-1976

1976 1977

1972-1976

1964-1977

1904-1977

1930-1977

1950-1976

1937-1976

1937-1976

1936-1948

1948-1963

1963-1974

1931-1933

1933-1937

1937-1949

1949-1957

1957-1974

1948-1963

1963-1969

1969-1976

1936-1948

1948-1963

1963-1969

1969-1974

1974-1976

1936-191.8

1943-1963

1963-1964

1964-1969

1969-1974

1974-1976

1936-1948

1948-1963

1963-1969

1969-1974

- 3 6

- 3 6

- 1 2

-13.5

-12.8

-7.5

-3.3

-6.7

-2.2

-9.7

SUBOIUISION

-28.2

•3.0

-5.4

-2.4

-6.8

-3.4

+5.1

- 1 0

-5.0

-16.0

-8.0

-n.6

-14.0

-50.1

-6.72

-8.4

-41.16

-17.64

-9.24

-16.0

-6.8

-18.0

+2.0

-24.0

-2.0

-7.4

-10.6

-4.0

- I4.6

+21.2

-15.9

-13.3

-4.6

-18.0

-3D.0

+108.2

-166.7

-1.13

-1.13

-0.38

-0.9

-0.64

-1.5

-0.22

-0.34

-0.55

-13.86

ESTABLISHED

-1.88

•0.15

-1.35

-3.43

-1 .7

-0.26

•0 .07

-0 .21

-0 .19

-0 .41

-0 .21

-0.05

-0.93

-4.55

-3.36

-2.1

-20.58

-2.26

-0.54

-1.07

-1.13

-2.57

+0.17

-1.6

-0.33

-2.4

-5.3

-0.33

-0.97

+21.2

-3.1B

-2.66

-2.3

-1.5

-2.0

+13.03

-33.34

-1.13

-1.13

-D.38'

-0.85

-0.55

-0.79

-1.7

-0.26

+0.07

-0.21

-0.19

-0.41

-0.21

-1.7

-1.93

-1.46

-1.05

-0.78

-2.79

18

18

18

26

26

26

26

26

26

26

3

26

26

26

26

26

43

43

24

18

18

18

20

20

18

43

43

43

43

43

20

20

23

20

20

18

13

19

20

20

20

18

18

19

20

20

18

18

Continued on next page.

Page 24: GIBB—COASTAL EROSION AND ACCRETION · 2019. 3. 24. · Coastal erosion is the process of removal of material at the shoreline which leads to loss of land as the shoreline retreats

452

APPENDIX 1 — (Continued)

(A) (B) (c)

N.Z. JOURNAL OF MARINE & FRESHWATER RESEARCH 12 (4), 1978

370

371

372

373

374

375

N134/3JS312

SOUTHERN HAUKE HA* N134/335336

B134/335378

WEST SHORE

BAY VIEW

UHIRINAKI

TANGOIO

N124/303407

N124/29B473

N124/312523

N124/342577

MURIUAI BEACH M07/320294

UAIKANAE BEACH N9B/33D33D

WAIKANAE BEACH

N98/37036Z •

(D)

H3r

H,r

n 3 u

H,d

(E)

S/G

G

376

375

380

3S1

3B2

383

2BU

TITIRANGI

TUAMDTU

SPONGE BAY

TUAHINE POINT

UAINUI BEACH

UIAINLJI BEACH

UAINUI BEACH

N9SAQ5353

N98A25327

N96/440326

N98/444323

N98A'*7335

N9Q/1.523147

N98/I.6O35G

H 3 d

Diu-Lwh.M/ST.

Sa-cS /ST. -M/ST.

Sa-cS /ST . -M /ST .

H 3 d

H 3 d

H_d

(F) (G)

LJAINUI BEACH N98/47D364

MAKARORI BEBCH N98/503386

'3 U

H,d

1936-19*48

1948-1962

1962-196".

1961.-1969

1969-1972

1972-197".

1936-191.B

1948-1962

1962-1969

1969-1972

1972-1974

1939-1940

1940-1941

1941-1942

1942-1943

1943.75-1943.96

1943-1946

1946-1948

1948-1950

1950-1952

1952-1954

1936-1§69

1969-1974

1882-1906

1906-1936

1936-1969

1969-1974

1936-1974

1936-1974

1934-1972

1931-1934

1934-1972

1886-1975

1886-1910

1910-1942

1942-1975

1886-1910

1910-1942

1942-1975

1886-1910

1910-1942

1942-1975

1886-1926

1926-1975

1886-1975

1887-1976

1887-1976

1887-1976

1889-1976

1914-1976

1921-1976

1891-1976'

•4 .0

+6.0

+2.6

+10.6

•6 .8

-19.3

•3 .0

•4 .0

+8.3

+ 1.7

-29.2

+19.D5

-42.29

+17.72

+11.43

+8.57

+16.19

•4.38

+8.57

-21.72

•4.76

+ 13.0

-23.7

+50.0

+20.0

• 18.5

-16.5

• -29 .1

-28.7

-29.1

+20.0-

-28.7

+290

+19

+44

+20

+ 18

+15

+47

+ 16

+22

+2?

+35

+ 1 0

- 6 2

-49.8

-2D.5

-17.8

0

+8.1

- 1 . 1

+11.1

(H)

+0.33

+0.43

• 1.3

• 2.12

+2.27

-9.65

+0.25

+0.29

+1.19

+G.52

-14.6

+33.42

-34.38

+15.41

+13.45

+40.81

+6.11

+2.67

+4.49

-7.78

+3.75

+0.39

-4.74

•2.08

+D.67

•0.56

-3 .3

-0.77

-0.76

-0.77

•6.67

-0.76

+3.26

+0.79

+ 1.38

+0.61

+0.75

+U.47

+ 1.42

+0.67

+0.69

+0.67

•o.aa

+0.20

-0.70

-0.56

-D.23

-0.20

0

•0.13

-0.02

.+0.13

+0.28

-0.32

•1.88

•-0.28

+0.78

-0.77

-0.76

-0.77

-0.21

•3.26

+ 1.07

+0.90

•0.67

+D.51

-0.70

-0.56

-0.23

-0.20

0

+0.13

-D.02

+0.13

(I)20

20

20

20

20

20

20

43

43

43

43

18

18.

19

18.

42

42

42

42

42

42

42

42

42

42

42

42

42

Page 25: GIBB—COASTAL EROSION AND ACCRETION · 2019. 3. 24. · Coastal erosion is the process of removal of material at the shoreline which leads to loss of land as the shoreline retreats

GIBB—COASTAL EROSION AND ACCRETION 453

(B) (c) (D) (E) (F)

3Q7

3B8

3B9

3 9 0

3 9 1

3 9 2

393

394

3 9 5

3 9 6

3 9 7

3 9 6

399

4 0 0

4 0 1

4 0 2

403

4 0 4

4 0 5

4 0 6

4 0 7

4 OB

4 0 9

4 1 0

4 1 1

4 1 2

4 1 3

TATAFDURI BEACH

TURIHAUA BEACH

POUAUIA BEACH

UHANGARA BEACH

TOLAGA BAY

TOLAGA BAY

KAIAUA BAY

ANAURA BAY

TOHOMARU BAY

HAUTAI BEACH

HAUTAI BEACH

KAUIA KAUIA BAY

KAWA KAIiJA BAY

KAUIA KAUIA BAY

HICKS BAY

GPAPE

OMARUMUTU

LOWER WAIAUA

TIRDHANGA

HIKUUIAI BEACH

HIKUUAI BEACH

OPOTIKI

UIAIOTAHI BEACH

yAIOTAHI BEACH

WAIOTAHI SPIT

OHIUIA

OHIUIA

N96/521395

N9B/53J412

N9B/570436

N9B/6D7492

N89/68B710

N89/682726

N90/705802

N89/6918B3

NB1/701010

N63/9GB570

N63/8B5590

N63/767617

N63/74762B

N63/732643

N6Z/69B677

N7D/B38218

N70/B20215

N7O/B0O212

N69/7B0209

N69/750207

N69/722206

N69/720206

M69/6B0206

N69/655207

B69/6302DB

' N69/610211

N69/601212

H 3 d

H 3 d

H , d

H 3 d

H 3 d

H 3 d

H 3 d

H 3 d

H 3 d

H 3 d

H 3 d

H 3 r

H 3 r

H 3 r

H 3 d

H 3 d

H 3 d

H 3 d

H 3 d

H 3 d

H3d

H 3 d

H , d

H 3 d

H 3 d

H 3 d

H , d

OHIWA SPIT

415 • DHOPE SPIT N69/56321B H.d

•416 OCEAW ROAD N69/540223. H,d

417 OHOPE BEACH N69/500234

418 OHOPE BEACH B69/470247

'3U

H3d

H.d

B/S

S/G

S

S

1896-1976

1920-1976

1915-1955

1955-1975

1396-1975

1B96-1976

1896-1976

1906-1976

1910-1976

1B96-1976

1913-1976

1912-1976

19QG-1975

1900-1975

1900-1975

1916-1976

1945-1964

1964-1971

1945-1964

1964-1971

1945-1964

1964-1971

1945-1964

1964-1971

.1945-1964

1964-1971

1BS6-1976

.1945-1964

1964-1971

1945-1971

1945-1971

1945-1971

1945-1971

1890-19D8

19DB-1938

1938-1945

1945-194B

194B-1959

1959-1970

1970-1976

1BS7-187B

1B7B-1909

1909-1945

1945-1959

1959-1965

1965-1970

1970-1971

1971-1976

1886-1945

"1945-1976

1944-1977

1944-1977

1953-1976-

(c)D

+22. U

-7 .6

-11.8

+ 1.6

+68. D

+27.2

+<*.2

-1.3Z

+61*. D

+3D.1

+39

+75

+ 13Q

+25

-68

+32

-50

-15

+25

-30

+22

+5L-

-20

+14

+8

+15

'-47

-30

+ 100

-100

-80

-15

-61

-5

-120

-25

-35

-40

-12

-4B

+30

+23

•+B0

( H ) (I ) (I)

+d.4r

-0.19

-0.59

+0.02

+0.B5

+0.34

+0.06

-0.02

+0.80

+0.47

+0.61

+ 1.0

• 1.73

+ 1.12

•a . 80

+ 1.32

+0.40

-0.32

+0.G2

+0.B5

+0.34

+0.06

-0.02

•0.80

+0.47

+0.61

+1.0

+1.73

+1.12

•0.80

62

62

42

42

42

62

27

27

27

-7.14

-0.42

+2.14

-O.BO

+3.57

-1.58

+3.14

+0.56

-1.05

+2.0

+0.31

•0.58

-1.81

-1 .15

+5.56

-3.33

+2.B6

-6.67

+B.64

-7.27

-2 .5

-5.43

-0.16

-3.29

-1.29

-6.09

-8.60

-7.59

-10. T,

+0.B5

+2.26

+0.91

+0.70

+3.48

-0.69

+0.27

+0.38

-0.31

+0.56

+0.32

+0.31

+0.58

•-1.81

-1.15

0

-3.15

+1.33

+0.91

+0.70

+3.48

Continued on

27

27

27

27

27

27

27

19

27

27

27

27

27

27

55

55

22

fl

22

22

22

22

22

22

22

22

22

22

22

22

22

27

27

19

next page

Page 26: GIBB—COASTAL EROSION AND ACCRETION · 2019. 3. 24. · Coastal erosion is the process of removal of material at the shoreline which leads to loss of land as the shoreline retreats

454APPENDIX

(A)

4'.9

4 2 0

4 2 1

4 2 2

4 ^ 3

4 2 4

4 25

4 2 6

4 2 7

426

4 29

4 3 0

4 3 1

4 3 2

433

434

435

436

437

43B

439

N.Z.1 — (Continued)

(B)

LMAKATANE

UHAKATfiKE

ORINI

GDLF C0UR5E

AIRPORT

RANGITAIKI

RANGITAIKI

TARAUERA

TARAUERA

MATATA

HERERU ROAD

PIKDWAI

OTAMAHAKAU

R0DGER5 ROAD

PUHEHJ.NA BEACH

LITTLE UAIHI

MAKETU

KAITUNA

PAPAMOA BEACH

DOMAIN ROAD

TE MAUNGA

(c)N69/44D272

N69/42527B

N69/4OO292

N69/386297

*69/360306

N68/320314

N66/302319

N68/270331

N68/232338

M68/2QD347

N68/170359

N68/130376

N6B/ae0402

N68/03a433

N6B/990463

N68/945500

N59/9155D5

K58/870520

N5B/B20550

N58/760577

1(58/710607

Jou

(V

H 3 d

H 3 d

H 3 d

H 3 d

H 3 d

H 3 d

H 3 d

H-,d

H 3 d

H 3 d

H 3 d

H 3 d

H 3 d

H 3 d

H 3 d

H 3 d

H 3 d

H 3 d

H 3 d

H , d

JOURNAL OF MARINE & FRESHWATER RESEARCH 12 (4), 1978

441

4 4 2

4 4 3

MAUNGANUI

MOUNT MAUNGANUI

MATAKANA ISLAND

^58/655657

M58/654653

^5B/63565D

i444 MATflKANA ISLAND N58/625667

445 MATAKAIVA ISLAND

(D) (E) (F) (G) ( H ) ( i ) (I)5

S

5

S

S

s

s

E

S

S

S

s

s

s

5

5

S

s

5

S

5

5

5

S

S

5

S

1944-1961

1961-1974

1BB6-1962

1944-1961

1961-1974

1686-1968

1968-1976

1944-1961

1961-1974

1944-1963

1963-1974

1B86-1962

1944-1963

1963-1974

1886-1962

1943-1963

1963-1973

1943-1963

1963-1974

1943-1963

1963-1974

1943-1963

1963-1974

1943-1963

1963-1977

1943-1963

1963-1977

1943-1977

1946-1960

1960-1974

194B-1960

1960-1974

1948- I960

1960-1974

1943-1960

1960-1974

1943-1959

1959-1974

1943-1959

1959-1974

1943-1959

1959-1974

1852-1954

1852-1901

19D1-1927

1927-1948

1948-1954

1954-1970

1852-1901

1901-1927

1927-1948

1946-1954

1954-1970

1943-1977

+15

- 3 0

+ 2 0

+ 15

+26

+ 1D0

+60

+20

+ 14

+43

+22

+ 101

+30

+20

+ 101

+ 12

0

+ 14

+8

- 3 4

- 8

+ 1 0

0

+ 2 8

- 2 8

+ 1 9

- 1 9

- 1 3

- 9 0

- 2 2

+ 20

+5

+28

+ 15

- 8

+ 14

- 1 5

- 1 5

- 1 8

+ 8

- 1 8

- B

- 7 0 . 1

- 2 4 . 4

+158.5

+61.0

+292.6

- 7 0 . 1

+167.6

-126.D

+61.0

+61.0

-57.9

+62

+0.68

-2.31

+0.26

+0.B8

+2.D

+ 1.22

+7.5

+ 1.18

+ 1.08

+2.26

+2.0

+ 1.33

+1.58

+1.82

+ 1.33

+0.6

0

+0.7

+0.73

-1.7

-0.73

+0.5

0

+ 1.4

~Z.D

+0.95

-1.36

-a.39

-7.5

-1.57

+ 1.67

+0.36

+2.33

+ 1.07

-G.47

+ 1.0

-0.94

-1.0

-1.13

+0.53

-1.13

-0.53

-0.69

-Q.41

+6.1

+2.9

+48.77

-4.38

+3.42

-4.92

+2.9

+10.17

-3.62

+ 1.62

-0.5

+0.26

+1.37

+1.78

+ 1.13

+2.17

+ 1.33

+ 1.67

+ 1.33

+0.4

+0.71

-1.35

+0.32

a

D

-0.35

-4.31

+D.96

+ 1.65

+0.19

-0.97

-0.32

-0.84

-D.69

+3.54

+0.88

+ 1.82

27

27

56

27

27

56

19

27

27

27

27

56

2 7

27

5 6

27

2 7

27

2 7

27

2 7

2 7

2 7

2 7

27

2 7

27

2 7

27

27

27

27

27

21

27

27

2 7

27

2 7

27

27

27

4 2

4 2

42

42

UZ

3 1

42

42

42

42

31

2?

Page 27: GIBB—COASTAL EROSION AND ACCRETION · 2019. 3. 24. · Coastal erosion is the process of removal of material at the shoreline which leads to loss of land as the shoreline retreats

APPENDIX 455

(A) (B) (C) (D)

446 MATAKANA ISLAND N5B/550752 H d

1*1*7 MflTArfANA ISLAND N56/516800 H,d

(E)

443 H,flTIhATI

449 BOWENTDLIN

U A I H I GEACH

452 LJAIh l BEACH

453 UlAIHI BEACH

!M54/483B'*4 H d

N53A72862 H,d

I\J53/4 46899

N53/44BBg9 H,d

(VEGETATION LINE)

4 55 bJAIHI BEACH N53/44D912 H d

456 uJAIHI BEACH N53/42B933 H,d

J.5S BUFFALO BEACH NW200633 H d

•4 5 9 KUADTUWU NttO/215761 H d

^.60 MIRANDA IV*B/B102i.a H r

iUQ'\ MANGATAUHIRI SPIT N3l*/3DD213 H d

*.62 MftNGATAUHIRI SPIT N3i./29i.225 H,d

S

S/G

G/S

(F)

1960-197^

19D2-1966

191.6-1959

1969-1977

19ifB-1969

1969-1977

19i*B-1969

19S9-1977

1957-1961

1961-1961*

191*2-1963

1963-1961.

196i*~1969

1969-1975

1963-1961*

1964-1969

1969-1975

1929-1939

1939-1957

1957-1965

1942-1963

1963-1964

1964-1969

1969-1975

1929-1948

1942-1963

1963-1964

1964-1969

1969-1975

1919-1929

1942-1963

1963-1964

1964-1969

1969-1975

(c)

+127.9

( H ) ( i )

+21..0

-46.1

+66.D

-53 . D

+9.5

-6 .5

-7 .9

-1 .6

+3t*.5

D

-24.D

+ 15.7

+42.4

-55.0

+9.2

+33. n

-1.3

+6.6

-13.0

+3.5

+72.0

-12.2

+34.2

-30.5

+Z.0

+ 2.92

+D.57

-1.17

+3.93

+2.0

+0.48

-6.75

-3.40

-1.5

-1.33

0

-10.88

•e.D

-2.25

+68.75

-10.29

+ 1.71

-6.77

-1.53

- • . 2 9

+3.45

0

-3.0

+0.77

+44.17

-10.83

+ 1.65

• 1.74

-0.06

+6.88

-2.52

+0.63

+7.2

-0.55

+35.63

-5.92

+0.36

10. APRIL 1966 UIAIHINE STORM EIRDDED 14-15m DUNE

1961 ERODED 13m FOREDUNE

-401930-1969

1974-1977

1934-1957

1871-1934

1934-1953

1871-1934

1934-1953

1953-1973

1973-1976

-3.7

-80.5

+60

+32

+40

+15

-5

-1.03

-1.23

-3.5

+0.95

+3.56

+0.63

+ 1.67

-0.5

-2.33

+ 1.58

+2.0

-0.97

-0.73

+D.29

+D.36

+ 1.74

-0.13

+7.2

-1.D3

-1.23

-3 .5

+ 1.20

+D.41

(I)

27

27

27

63

63

63

63

63

18

63

10

35

35

3

53

59

60

GO

6D

60

5

5

Continued on next page.

Page 28: GIBB—COASTAL EROSION AND ACCRETION · 2019. 3. 24. · Coastal erosion is the process of removal of material at the shoreline which leads to loss of land as the shoreline retreats

456 N.Z.

APPENDIX 1 — (Continued)

JOURNAL OF MARINE & FRESHWATER RESEARCH 12 (4) , 1978

A)

163

465

466

4 6 7

4 6 8

469

4 7 0

( B )

MANGATAWHIRI S P I "

NGUNGURU SPIT

UHANANAHI SPIT

DKUPE BEACH

OKUPE BEACH

OKUPE BEACH

MIMIUIHANGATA BAV

MIMIUHANGATA 6AV

(c)N34/292238

N20/Q23080

N16/973218

N16/9353OO

N16/935307

N16/936314

N16/923314

N16/927325

(D)

H 3 d

H 3 d

H 3 d

H 3 d

VH 3 d

H 3 d

H . d

(E)

s

s

s

s

ssss

(F)

1fl71-193*i

193l*-195D

1950-1953

1953-1961

1961-1963

1963-1973

1973-1976

1871-193*.

19£.2-195D

1950-1953

1953-1961

1961-1963

1963-1966

1966-1968

1968-1973

1973-1976

191*2-1959

1959-1963

19<*2-1951

1951-1961

1961-1963

1880-1970

188D-1970

1880-1970

1880-1970

1880-1970

(G)

+<*a

- 7 6

+18

+ 15

+33

- 5 3

- 7

0

0

- 4 0

- 6 5

+20

- 4 5

- 4 5

- 6 0

- 3 0

- 2 0

0

+20

- 2 0

0

• 2 0

+ 150

+20

+6

- 4

( H )

+0.63

-12.67

+6.9

+1.8S

+ 16.5

-5.3

-2.33

0

0

-13.33

-8.13

+ 10.0

-15.0

-27.5

-15.0

-10.0

-1.18

0

•2.22

-2.0

0

+0.22

• 1.67

+0.22

+0.07

-0.04

( I )

-0.29

-2.52

-0.95

0

+0.22

.1.67

+0.22

+0.07

-0.04

( I )

6 0

6 0

60

6 0

60

5

5

60

60

60

60

60

6 0

5

5

5

5

60

6 0

60

6 0

60

9

9

9

9

9

APPENDIX 2—Standard abbreviations for Quaternary and older lithologies. Abbreviations marked with anasterisk are adopted from observations during field work and are not recorded on N.Z. Geological Surveygeological maps. Others are adopted from N.Z. Geological Survey Quaternary geological maps of N.Z.(1973a, b) and from Folk (1968).

PLEISTOCENELower Middle

Hid

WmWif

Upper

H2d

H2mH2a

Haj

t

Lithologies older than

Present day beaches

HOLOCENE

H3d*H3r*H3b*H3r/dH3mH3aH3jH3sH3t

LANDFORM

DuneBeach ridgeBarrier ridgeBeach ridge and duneCliffCliffCliffCliffCliff

f M/ST. Mudstone\ S/ST. Sandstone[ CONGL. ConglomerateJ G. O-1.O0)I S. «-l.O0)

LlTHOLOGY

SandGravelGravel and sandGravel and sandMarine and estuarine depositsAlluvial and glacial outwash fansLahar depositsASwamp and lacustrine depositsTillConsolidated mudConsolidated sandConsolidated gravelUnconsolidated gravelUnconsolidated sand