Wave data recording program Brisbane Region 1976-1994
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· • Queensland Conservation data report No. W09.2 - • \CWDepartment of Environment and ISSN 0158-7757 RE133 August 1994 . Herltaqe Wave data recording program Brisbane Region 1976 - 1994
Wave data recording program, Abbot Point Region • Abstract This report provides summaries of primary analyses of (Report No.W06.1) 6 May 1977 to 9 August 1979 wave data recorded in water depths of 60 metres and Wave data recording program, Weipa Region greater, offshore near Brisbane in southern Queensland. (Report No.W07.1) 21 Dec. 1978 to 7 Apr. 1983 Data was recorded using a Datawell Waverider buoy, and Wave data recording program, Gladstone Region covers the period 30 October 1976 to 30 June 1994. The (Report No.W08.1) 19 Dec. 1979 to 16 May 1983 data was divided into seasonal groupings for analysis. No Wave data recording program, Brisbane Region estimations of wave direction data have been provided. (Report No. W09.1) 30 Oct. 1976 to 30 June 1983 Wave data recording program, Bowen Region This report has been prepared by the Coastal Management (Report No.W10.1) 14 Sept. 1978 to 15 Nov. 1984 Branch, Division of Conservation, Queensland Department Wave data recording program, Moreton Island Region of Environment and Heritage on behalf of the Beach (Report No.W11.1) 15 June 1983 to 12 Apr. 1985 Protection Authority. Wave data recording program, Bramston Beach Region (Report No.W12.1)16 Dec. 1981 to 28 Oct. 1985 While reasonable care and attention has been taken in Wave data recording program, Hay Point Region collecting, processing and compiling wave data in this (Report No.W13.1) 22 Mar. 1977 to 25 May 1987 report, the accuracy and reliability of this information is not Wave data recording program, Gold Coast guaranteed in any way by the Beach Protection Authority. (Report No.W14.1) 20 Feb. 1987 to 30 June 1994 The Authority accepts no responsibility for the use of this Wave data recording program, Kirra information in any way. (Report No.W15.1) 25 Aug. 1988 to 30 June 1994
August 1994 Contents 1.0 Introduction Beach Protection Authority, c/ Queensland Department of 2.0 Recording equipment Environment and Heritage, PO Box 155, BRISBANE 3.0 Wave recording and analysis procedures ALBERT STREET QLD 4002. 4.0 Data losses 5.0 Wave climate Copyright © Queensland Government 1994. 6.0 Data presentation Apart from any fair dealing for the purpose of study, 7.0 References r-esearch, criticism or review as permitted under the Copyright Act, no part of this report can be reproduced, Appendices stored in a retrieval system or transmitted in any form or by Appendix 1 Details of wave recorder installation any means, electronic, mechanical,photocopying, Appendix 2 Major meteorological events recording or otherwise without written permission.
Other reports in this series: Tables 1: Wave statistics; wave period (Tp)/wave height Wave data recording program, Cairns Region Table (Hsig) occurrences, all data, all directions (Report No. W01.1) 2 May 1975 to 3 Sept. 1978 Wave data recording program, Cairns Region Table 2: Wave statistics; wave period (Tp)/wave height (Hsig) occurrences, summer data, all directions (Report No.W01 .2) 2 May 1975 to 11 June 1985 3: Wave statistics; wave period (Tp)/wave height Wave data recording program, Mackay Region Table (Report No.W02.1) 17 Sept. 1975 to 5 Nov. 1976 (Hsig) occurrences, winter data, all directions Wave data recording program, Mackay Region (Report No.W02.2) 17 Sept. 1975 to 23 Aug. 1985 Figures Wave data recording program, Townsville Region Figure 1: Locality map (Report No.W03.1) 19 Nov. 1975 to 23 Feb. 1979 Figure 2: Percentage (of time) exceedance of wave Wave data recording program, Townsville Region heights (Hsig) for all wave periods (Tp) (Report No.W03.2) 19 Nov 1975 to 29 Dec 1987 Figure 3: Histogram percentage (of time) occurrence of Wave data recording program, Sunshine Coast Region wave heights (Hsig) for all wave periods (Tp) (Report No.W04.1) 5 Apr. 1974 to 5 July 1977. Figure 4: Histogram percentage (of time) occurrence of Wave data recording program, Burnett Heads Region wave periods (Tp) for all wave heights (Hsig). (Report No.W05.1) 5 May 1976 to 5 May 1982 Figure 5: Wave parameter relationships Wave data recording program, Burnett Heads Region Figure 6: Daily wave recordings (Report No.W05.2) 5 May 1976 to 13 Oct. 1988 Figure 7: Cyclone tracks
Wave data recording program, Brisbane Region - 1976-1994 •August 1994 • ISSN 0158-7757 1.0 Introduction Wave parameters resulting from this processing include the As part of its long-term data collection program, the Beach following: Protection Authority has been recording wave characteristics along Queensland's coastline since 1968. S(f) energy density spectrum This has been done using a series of wave recording Hsig significant wave height (time domain), the stations. This report summarises the primary analyses of average of the highest one-third of the waves wave data collected at the Brisbane station. In addition, in the record brief details of the recording equipment, the method of Hmax highest individual wave in the record handling raw data and the type of analyses used are Hrms root mean square of the wave heights in the provided. record (time domain) Tsig significant wave period (time domain), the average period of the highest one-third of 2.0 Recording equipment waves in the record All the Beach Protection Authority's wave recording stations Tz average period of all zero upcrossing waves use the Waverider system manufaGtured by Datawell b.v. of in the record (time domain) the Netherlands. In this system, a waverider buoy is used to Tpeak wave period corresponding to the peak of the determine the sea surface fluctuations at an offshore energy density spectrum location. Vertical acceleration of the buoy is measured by Tc average period of all the waves in the record an accelerometer mounted on a stabilised platform in the based on successive crests buoy and twice integrated to give displacement. The instantaneous water level data are then transmitted to the These parameters form the basis for the summary plots and shore station as a frequency modulated high frequency tables attached to this report. radio signal.
In the original configuration of the Brisbane station, first 4.0 Data losses installed on 30 October 1976, the shore station consisted of Data losses can be divided into two categories - losses a WAREP Waverider receiver and a DIMA digitiser/recorder. due to equipment failure and losses during data processing The WAREP receiver controlled the timing of data recording due to signal corruption. Common causes of data corruption and provided a paper chart of the water level signal. Wave include radio interference and a spurious low frequency data were recorded by the DIMA unit in 20-minute bursts component in the water level signal caused by a tilting and digitised at 0.5 second intervals (2.0Hz). The data were accelerometer platform in the Waverider buoy. recorded on digital cassettes and, along with the paper charts, transferred to Brisbane office for processing. Analysis of data recorded by the WAREP/DIMA and the PC based systems include some data rejection checks. In the On 1 November 1991 , the wave recording system was case of the WAREP/DIMA data, the length of the record can upgraded to a personal computer-based system utilising the be shortened to exclude corrupt data points. In the PC Datawell DIWAR Waverider receiver/digitiser. The water based analysis, a small number of spurious data points can level data, digitised at 0.39 second intervals (2.56Hz), are be corrected by an interpolation procedure. Otherwise the recorded in bursts of 4096 points (approximately 27 entire series is rejected. minutes) and recorded on the hard disk of the PC. The proprietary software running on the PC controls the timing Details of data losses for the Brisbane wave recording of data recording and processes the data in 'near real time' station are included in Appendix 1. to provide a set of standard sea-state parameters which may be accessed remotely via the public switched 5.0 Wave climate telephone network. Recorded data and analysis results are The wave climate presented in this report is based on downloaded daily to a central computer system in Brisbane statistical analyses of the parameters obtained from the for checking and archiving. recorded wave data. Programs developed by the Authority provide statistical information on percentage of time Further information on the operation of the Waverider buoy occurrence and exceedance for wave heights and periods. and the recording systems can be obtained from the The results of these analyses are presented in tables 1, 2 sources listed in section 7 of this report. and 3 and figs.2, 3 and 4. In addition, similar analyses are carried out on the relationships between the various wave parameters and these are presented in fig.5. 3.0 Wave recording and analysis procedures Over the period 20 February 1987 to 31 October 1991, 6.0 Data presentation wave data have generally been recorded four times a day No attempt has been made to interpret the recorded data for at 0300, 0900, 1500 and 2100 hours (Australian Eastern design purposes or to apply corrections for refraction, Standard Time). During storm events the recording diffraction and shoaling to obtain equivalent deep water frequency might have been manually switched by the waves. Before any use is made of this data, the exact operator to record eight times a day. Since 1 November location of the buoy and the water depth in which the buoy 1991, the PC-based recording system has recorded data was moored should be noted. This information is given in at (nominally) hourly intervals. Appendix 1. The data presented does not include any information on wave directions. The Waverider recording Recorded wave data are analysed in the time domain by system is designed to record only vertical movements of the the zero upcrossing method and in the frequency domain by water surface. Other means must be used to correlate wave spectral analysis. Spectral analysis of the WAREP/DIMA directions and wave records. data was performed by the autocorrelation method providing 50 lags at a spacing of 0.2 Hz. The PC-based When major meteorological events such as cyclones analysis uses Fast Fourier Transform techniques to give occurred during the recording period, these have been 128 spectral estimates in bands of 0.01 Hz. The zero noted. They are summarised with the maximum wave upcrossing analysis is equivalent in both systems. heights recorded and other comments in Appendix 2.
For analysis, summer has been taken as the period from 1 November to 30 April of the following year. Winter covers the period 1 May to 31 October in any one year.
2 Wa ve data recording program, Brisbane Region - 1976-1994 ·August 1994 • ISSN o158-7757 7.0 References From 1 November 1991, one-hourly samples approximately Datawell, Operation and service manual for the 26 minutes long have been taken giving 4096 water surface Waverider - series 6000 elevation figures for that period from which sea state Datawell, Manual of Waverider receiver type parameters are calculated and recorded. WAREP - mark II Datawell, Manual of the digital Waverider receiver Number of records analysed: 33 589 type DIWAR Number of days in recording period 30 October 1976 to 30 Datawell, Manual of the digital magnetic tape recorder June 1994: 6452 type DIMA - mark II Number of days of data lost due to equipment failure and Lawson and Treloar Pty Ltd (1991), Real time wave signal corruption (see 4.0 above): 1067 analysis package Percentage of recordings available for analysis: 83.46% Bureau of Meteorology, Monthly weather review Periods during which four recordings a day were taken: 6-8 February 1978 Appendices 20-27 July 1978 Appendix 1 Details of Brisbane Region wave 10 January 1979 recorder installations 31 January - 25 February 1979 Details of wave recorder installation 7 January 1980 Location: 153°37' East, 27"25' South; 9.0 kilometres 14-20 February 1981 E of Point Lookout (see fig.1) 7-10 April 1981 Period: 30 October 1976 to 24 November 1988 8-16 April 1982 Water depth at buoy: 70 metres relative to Australian 17 June 1982 to 31 October 1991 height datum Periods during which five recordings a day were taken: Location: 153°37' East, 27°29' South, 11.0 kilometres 27 January 1982 ESE of Point Lookout (see fig.1) Period: 25 November 1988 to 31 October 1991 Periods during which six recordings a day were taken: Water depth at buoy: 80 metres relative to Australian 2 March 1989 height datum Periods during which eight recordings a day were taken: These two locations were calculated using radar ranging 27-28 February 1980 and compass bearings to prominent landmarks. 22-25 October 1985 13-17 August 1985 Location: 153°37' East, 27°23.88' South, 9.31 kilometres ENE of Point Lookout (see fig.1) Period: 31 October 1991 to 13 July 1994 Water depth at buoy: 76 metres relative to Australian height datum
This location was .measured using GPS fixing procedures. Water depths are accurate to +/- 1 metre.
Note: Between 13 July 1994 and 29 August 1994, the location was 153°37.14' East, 27°24.38' South, 9.22 kilometres ENE of Point Lookout (see fig.1) where the water depth was 80 metres relative to Australian height datum. On 29 August 1994, the buoy was shifted to about 11km ESE of Point Lookout.
Period of data collection 30 October 1976 to 30 June 1994
Location of recording stations 30 October 1976 to 1 October 1987, Department of Harbours and Marine Pinkenba Depot
1 October 1987 to 10 January 1989, Department of Harbours and Marine, Queensland Government Hydraulics Laboratory, Deagon
11 January 1989 to 23 October 1991, Point Lookout Surf Life Saving Clubhouse
24 October 1991 to present, Point Lookout Hotel
Recording Normal recording interval: Two 20-minute records daily at 0300 hours and 1500 hours between 30 October 1976 and 16 June 1982.
Four 20-minute records daily at 0300 hours, 0900 hours, 1500 hours and 2100 hours between 17 June 1982 and 31 October 1991.
Wa ve data recording program, Brisbane Region - 1976-1994 •August 1994 • ISSN 0158-7757 3 Appendix 2 Major meteorological events
Meteorological Central Date Estimated Maximum Maximum Tp event pressure position Hsig Hmax (secs) (HPa) of cyclone recorded recorded relative to (metres) (metres)
. buoy (km)
Low pressure system 1004 19-05-77 4.38 6.26 12.32 offshore from Brisbane
Low pressure system 1008 30-07-79 offshore from Brisbane 4.67 8.73 10.99
Cyclone Paul 992 08-01-80 530 ESE 4.25 9.84 9.28
Cyclone Ruth 998 14-02-80 610 NE 4.02 6.30 9.83
Cyclone Sina and high 1002 10-03-80 1250 NNE 3.70 5.27 8.41 pressure system near and Tasmania 1032
Low pressure system 1008 08-05-80 offshore from Brisbane 5.21 8.06 11.73
Cyclone Cliff 994 15-02-81 220 NNE 4.33 7.16 9.64
Low pressure system 1012 22-05-81 3.75 5.21 8.54 offshore near Fraser Is
Cyclone Abigail 984 27-01-82 790 E 4.00 5.37 9.73
High pressure system 1040 04-06-83 5.27 10.04 11.02 in Tasman Sea
Low pressure system 1008 22-06-83 3.81 5.78 8.75 offshore from Brisbane
High pressure system 1032 08-04-84 5.22 7.31 10.58 over Tasman Sea and and low pressure system 1000 off south-east Queensland
High pressure system 1036 20-05-84 4.13 6.78 11.24 over Tasman Sea
Low pressure system 1004 09-07-85 3.93 6.79 9.08 offshore from Brisbane
High pressure system 1032 27-10-85 3.87 4.98 10.16 over Tasman Sea
High pressure system 1024 25-01-86 3.77 6.79 10.51 over Southern Ocean and and low pressure 996 system off south-east Queensland
Low pressure system 1008 17-06-86 3.99 6.90 12.44 off south-east Queensland
4 Wa ve data recording program, Brisbane Region - 1976-1994 ·August 1994 • ISSN 0158-7757 . Meteorological Central Date Estimated Maximum Maximum Tp event pressue position Hsig Hmax (secs) (HPa) of cyclone recorded recorded relative to (metres) (metres) buoy (km)
Low pressure system 1012 05-03-87 4.65 9.08 9.52 off Queensland
High pressure system 1028 09-04-87 3.87 5.82 9.51 over Tasman Sea
High pressure system 1036 09-05-87 3.63 6.33 9.65 over Tasman Sea
High pressure system 1036 01-10-87 3.60 5.05 9.11 over Great Australian Bight
Low pressure system 1004 15-01-88 4.29 6.81 10.36 off south-east Queensland
996 10-02-88 3.92 6.39 12.73 Low pressure system . over New South Wales
Low pressure system 1004 16-02-88 3.94 6.12 9.26 off northern and Queensland and high 1024 pressure system over Tasman Sea
High pressure system 1028 06-03-88 4.02 6.59 14.94 over Great Australian Bight
Low pressure system 1008 11-04-88 4.10 6.28 11.29 over Brisbane
High pressure system 1032 30-05-88 3.75 6.38 9.87 over Tasman Sea
Low pressure system 1000 05-06-88 4.48 7.19 9.71 off Victorian coast
Low pressure system 1012 05-07-88 3.97 6.71 8.78 over Queensland and and high pressure system 1032 over Tasman Sea
High pressure system 1032 12-07-88 4.48 9.16 9.24 over Victoria
Low pressure system 1000 15-09-88 4.62 7.05 9.43 off Brisbane
High pressure system 1024 06-11-88 4.19 7.24 9.53 over Tasman Sea and and low pressure system in 1004 Coral Sea
Wave data recording program, Brisbane Region - 1976-1994 ·August 1994 •ISSN 0158-7757 5 Meteorological Central Date Estimated Maximum Maximum Tp event pressure position Hsig Hmax (secs) (HP a) of cyclone recorded recorded relative to (metres) (metres) buoy (km)
Cyclone Aivu 995 05-04-89 800 NNE 3.94 6.42 10.33
Low pressure system 1000 25-04-89 6.11 9.11 10.62 . off south-east and Queensland and high 1028 pressure system off southern central NSW
Low pressure system 1004 29-05-89 4.76 7.37 10.33 off south-east Queensland
Low pressure system 1004 19-08-89 4.74 6.76 10.03 off south-east Queensland
High pressure system 1024 07-09-89 4.09 5.81 9.43 over Tasman Sea
Cyclone Nancy 975 01-02-90 375 NE ** ** **
High pressure system 1032 09-06-90 4.49 7.57 10.32 over Tasman Sea and and low pressure system 1008 off central Queensland
Low pressure system 1008 07-11-90 3.98 6.61 10.02 off Brisbane
High pressure system 1020 13-01-91 1.92 2.53 7.65 off central NSW
Low pressure system 1006 11-05-91 3.00 5.25 9.9 off south-east Queensland coast
Passage of front 1020 24-06-91 2.90 4.85 9.5 through south-east Queensland with a high pressure system over central Queensland
Passage of trough 1024 22-11-91 3.20 5.50 10.2 through south-east Queensland with a high pressure system off central NSW
Low pressure system over south-east 1004 12-12-91 ** ** ** Queensland
6 Wa ve data recording program, Brisbane Region - 1976-1994 ·August 1994 •ISSN 0158-7757 Meteorological Central Date Estimated Maximum Maximum Tp event pressure position of Hsig Hmax (secs) (HPa) cyclone recorded recorded relative to (metres) (metres) buoy (km)
Cyclone Betsy 978 13-01-92 650 NE 4.39 8.45 9.50
Cyclone Daman 998 18-02-92 400 E 4.30 8.08 13.20
Cyclone Fran 980 15-03-92 260 N 3.59 6.82 10.26
High pressure system 1036 05-04-92 3.90 6.42 8.80 over Tasman Sea
Low pressure system 994 13-05-92 ** ** ** over Tasman Sea
High pressure system 1008 25-11-92 2.07 3.65 7.10 off Queensland and ·trough across southern Australia .
Cyclone Roger off 992 17-03-93 420 NE 7.36 13.09 12.00 south-east Queensland
High pressure system 1032 14-09-93 2.70 4.84 8.45 in Tasman Sea
Low over southern 1000 04-10-93 3.07 5.41 7.65 NSW coastline
Cyclone Rewa 992 21-01-94 300 ENE 3.23 5.47 9.93
** No data available due to buoy equipment failure.
The highest significant wave height (Hsig) recorded was 7 .36 metres on 17 March 1993 due to the passage of Cyclone Roger off the south Queensland coast. The highest maximum wave height (Hmax) recorded was 13.09 metres on 17 March 1993 due to the passage of Cyclone Roger off the south Queensland coast. Meteorological information obtained from Monthly Weather Review, published by the Bureau of Meteorology.
Wa ve data recording program, Brisbane Region - 1976-1994 ·August 1994 • ISSN 0158-7757 7 Table 1. Wa ve statistics - Wa ve period/Wave height occurences - All data, alldirections l
Significant Peak energy wave period (seconds) wave height Totals
- - - - (metres) 0 2.99 3 - 4.99 5 - 6.99 7 8.99 9 10.99 11 12.99 13 - 14.99 > 14.99
0.00 - 0.25 1.26 - - - - - 0.25 - 1.51 0.26 - 0.50 1.24 0.08 2.50 4.72 3.49 1.25 - - 13.28 0.51 - 0.75 0.25 20.64 41.47 83.69 109.50 31.08 2.33 0.42 289.38 0.76 - 1.00 0.24 62.11 120.72 321.77 313.57 84.87 7.89 0.42 911.59 1.01 - 1.25 - 50.35 165.78 437.17 357.90 77.29 7.00 0.08 1095.58 1.26 - 1.50 - 18.35 165.06 381.37 354.30 75.00 6.08 0.42 1000.58 1.51 - 1.75 - - 115.68 267.10 239.48 62.19 5.64 0.08 692.51 1.76 - 2.00 - 2.33 69.64 224.77 180.19 48.19 3.85 - 526.71 2.01 - 2.25 - 0.06 31.68 159.46 119.48 35.33 1.33 - 347.26 2.26 - 2.50 - - 12.52 127.31 80.14 23.69 3.89 0.04 247.58 2.51 - 2.75 - - 2.21 77.53 58.59 15.75 1.58 0.15 155.81 2.76 - 3.00 - - 0.52 41.70 40.08 17.94 2.48 0.04 102.76 3.01 - 3.25 - - - 20.93 24.13 10.04 0.84 0.04 55.97 3.26 - 3.50 - - 0.04 7.24 18.83 7.55 0.52 - 34.19 3.51 - 3.75 - - - 6.74 14.49 3.08 0.16 - 24.47 - - - 3.76 - 4.00 ; 2.11 9.40 2.92 - 14.43 4.01 - 4.25 - - - 1.10 6.98 2.08 0.28 - 10.45 4.26 - 4.50 - - - 0.08 5.74 1.12 0.04 - 6.97 4.51 - �.75 - - - - 3.46 0.57 - - 4.03 4.76 - 5.00 - - - - 1.22 0.02 - - 1.24 5.01 - 5.25 - - - - 1.71 0.76 - - 2.47 5.26 - 5.50 - - - - 0.02 0.66 - - 0.68 5.51 - 5.75 - - - - 0.10 0.44 - - 0.54 5.76 - 6.00 - - - - - 0.18 - - 0.18 6.01 - 6.25 - - - - 0.25 0.21 0.02 - 0.48 6.26 - 6.50 - - - - 0.02 0.20 - - 0.22 6.51 - 6.75 - - - - - 0.15 - - 0.17 6.76 - 7.00 - - - - - 0.20 0.04 - 0.20 7.01 - 7.25 - - - - - 0.08 - - 0.12 7.26 - 7.50 - - - - - 0.03 - - 0.03
Totals 2.99 153.93 727.80 2164.81 1943.08 502.85 44.32 1.69 5600.94
Values are durations in days rounded to two decimal places.
8 Wa ve data recording program, Brisbane Region - 1976- 1994 ·August 1994 ·ISSN 0158-7757 Table 2. Wave statistics - Wave period/Wave height occurences - Summer data, alldire ctions.
Significant Peak energy wave period (seconds) wave h.eight Totals ------(metres) 0 - 2.99 3 4.99 5 6.99 7 8.99 9 10.99 11 12.99 13 14.99 > 14.99
0.00 - 0.25 0.50 ------0.50 0.26 - 0.50 - - 0.25 1.97 0.53 - - - 2.75 0.51 - 0.75 - 7.43 21.77 36.43 32.70 3.89 0.63 0.29 103.14 0.76 - 1.00 - 30.30 67.50 186.77 128.72 25.49 0.71 0.13 439.92 1.01 - 1.25 - 28.32 84.15 245.82 157.93 23.13 0.83 - 540.18 1.26 - 1.50 - 7.92 83.50 237.38 168.24 22.70 2.37 - 522.11
1.51 - 1.75 - 1.50 59.79 151.61 116.71 21.95 3.10 0.08 354.76
1.76 - 2.00 - 0.06 29.58 137.88 82.33 19.94 2.04 - 271.84 2.01 - 2.25 - - 15.73 99.72 64.65 12.45 0.42 - 192.97 2.26 - 2.50 - - 6.20 81.14 41.01 11.21 1.58 - 141.14
2.51 - 2.75 - - 0.96 45.09 32.19 5.95 0.54 - 84.73 2.76 - 3.00 - - 0.48 27.93 22.30 9.97 1.73 - 62.40 - 3.01 - 3.25 - - 14.06 15.52 4.25 0.04 - 33.87 - - 3.26 - 3.50 - 0.04 4.98 12.56 2.73 0.35 20.66 3.51 - 3.75 - - - 4.23 8.69 2.45 0.04 - 15.41
3.76 - 4.00 - - - 0.94 5.55 1.84 - - 8.34
4.01 - 4.25 - - - 0.51 5.11 1.58 0.28 - 7.49 4.26 - 4.50 - - - 0.04 2.50 0.37 0.04 - 2.95 4.51 - 4.75 - - - - 2.21 0.07 - - 2.27 - 4.76 - 5.00 - - - - 0.97 0.02 - 0.99 5.01 - 5.25 - - - - 1.09 0.26 - - 1.34
5.26 - 5.50 - - - - 0.02 0.16 - - 0.18
5.51 - 5.75 - - - - 0.10 0.44 - - 0.54
5.76 - 6.00 - - - - - 0.18 - - 0.18 6.01 - 6.25 - - - - 0.25 0.21 0.02 - 0.48 6.26 - 6.50 - - - - 0.02 0.20 - - 0.22
6.51 - 6.75 - - - - 0.02 0.15 - - 0.17
6.76 - 7.00 - - - - - 0.20 - - 0.20
7.01 - 7.25 - - - - - 0.08 0.04 - 0.12
7.26 - 7.50 - - - - - 0.03 - - 0.03
Totals 0.50 75.54 369.96 1276.50 901.92 171.89 14.77 0.51 2834.35
Values are durations in days rounded to two decimal places.
Wa ve data recording program, Brisbane Region - 1976-1994 •August 1994 • ISSN 0158-7757 9 Table 3. Wave statistics - Wave period/Wave height occurences - Winter data, alldirectio ns.
Significant Peak energy wave period (seconds) wave height Totals
...... (metres) 0 2.99 3 4.99 5 6.99 7 8.99 9 10.99 11 12.99 13 14.99 > 14.99
0.00. 0.25 0.76 . . . . . 0.25 . 1.01 0.26. 0.50 1.24 0.08 2.25 2.75 2.96 1.25 . . 10.53 0.51 . 0.75 0.25 13.20 19.70 47.26 76.80 27.19 1.71 0.13 186.24
0.76 • 1.00 0.24 31.81 53.21 135.01 184.85 59.38 7.18 0.29 471.99 1.01 . 1.25 22.02 81.63 191.37 199.99 54.17 6.17 0.08 555.42 1.26 . 1.50 . 10.43 81.56 144.01 186.07 52.30 3.71 0.42 478.50 1.51. 1.75 . 0.83 55.�9 115.49 122.76 40.24 2.53 . 337.75 1.76. 2.00 . 40.06 86.88 97.86 28.25 1.81 . 254.87 2.01 . 2.25 . . 15.93 59.74 54.83 22.87 0.92 . 154.28 2.26. 2.50 . . 6.31 46.17 39.13 12.48 2.30 0.04 106.44 2.51 . 2.75 . . 1.25 32.45 26.39 9.79 1.04 0.15 71.08 2.76. 3.00 . . 0.04 13.77 17.78 7.98 0.75 0.04 40.36 3.01 . 3.25 . . . 6.87 8.61 5.79 0.80 0.04 22.10 3.26. 3.50 . . . 2.27 6.28 4.81 0.17 . 13.53 3.51 . 3.75 . . . 2.51 5.80 0.63 0.13 . 9.06
3.76. 4.00 . . . 1.17 3.84 1.08 . . 6.09 4.01 . 4.25 . . . 0.59 1.87 0.50 . . 2.96 4.26. 4.50 . . . 0.04 3.24 0.75 . . 4.02
4.51 . 4.75 . . . . 1.25 0.50 . . 1.75
4.76. 5.00 . . . . 0.25 . . . 0.25 5.01 . 5.25 . . . . 0.63 0.50 . . 1.13 5.26. 5.50 . . . . . 0.50 . . 0.50 5.51 . 5.75 ...... 0.00 . . . 5.76. 6.00 . . . . . 0.00 ...... 6.01 • 6.25 0.00
6.26. 6.50 ...... 0.00
6.51 . 6.75 . . . - . . . . 0.00 6.76. 7.00 ...... 0.00
7.01 . 7.25 ...... 0.00 . . . 7.26. 7.50 . . . . . 0.00
Totals 2.49 78.39 357.84 888.35 1041.09 330.96 29.46 1.18 2766.66
Values are durations 1n days rounded to two decimal places.
10 Wave data recording program, Brisbane Region - 1976-1994 •August 1994 • ISSN 0158-7757 . ' . o . 0 0 ... M· M -: M . '.. t(). (., � � � 26"50 . � 26'50'
kilometres • WAVE RECORDING STATIONS A WAVERIDER BUOYS DEPTH IN METRES TO MEAN SEA LEVEL WAVERIDER BUOY LOCATIONS 1 30 October 1976 to 24 November 1988 2 25 November 1988 to 31 October 1991 21·0·· 3 July 31 October 1991 to 13 1994 27'0' 13 July 1994 to 29 August 1994 29 August 1994 to Present time.
27"10'
MORETON
BAY
. . . . 21·_20· �-- : �·-:· 0 27'20'
4 to Scale QUEENSLAND
0 .. (., 21·40· �
LOCALITY MAP
Beach Protection Authority Wave Data Recording Program Figure Queensland 1 BRISBANE REGION Queen.lend Oepartmenl of En�ronment and Heritage
Wave data recording program, Brisbane Region - 1976-1994 •August 1994 •ISSN 0158-7757 11 0\ 0\
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I : ...... --� ...... •...... •. • •...: ...... •.. I I :I .. �- : .. ; ... : ... �- �- ...... : ...... -� . . • � � :��� � � � i ··-
: : : : : : : : ' ' . .t.t: : : � ·1• •t••t!1:••r•••••r•••••·• !••·••••••••••>• ••:•1•:••1•••r••t•••• t••••·•:·•·•·•·•••••••··•� 0 1 lfffFT ! :1:1r1 rr 1 1 : : . : ...... • :t :: : : 0 . .. ; . . . ; ...... : .. ; . . . : ...... ; ...... · .... . : . .. : . . 0 ... � ...... •.; ...... �-. �-. -� ... �- ... : ...... ; . ; : ; . . . .; ...... --�...... · .·· -.·- .· .. -- ...... · ; : .. ·· · : - · i- ..... < ;. __ ; . ;..... -: ...... ;. - · . -- . . ; . -·.. ·- .. ...: --..- : ....-- : --. . : -- ...... · ·: . . ··· ···-,;·: -·...···..·······. . -·····...... : . . ; . . . --:-...... ----- :...... -_; ...... -- -· ·· . ··-� �-- � ---·: -- ··· :---...... · .. ... : ... : ...... :- -.:---···· ·- �-- ·· ·-- . . · · ...... -- . . . . - ... '.--. '...... : ...... - --....; ...... · ...... ; ... ; .... ; ...... ;...... ; ...... ; ...... : .. ; : ... ; .. -: :· . -- . . • ...... : .. �-. : ... �-- ...... -� � �- -:--..... -:--...... -� -· - �- --�- -�-. . . -� · · .• .. .. ·--�-··j··. ·j····--:···-----:--...... ·;-·· ...... --: --:--·=··· j····j·····+--·····:--··--··· -�-----···-- ··--· - _ :__ ...... : ... : . . ; ...... : ...... : : ...... : : . ; .. ; :; . : . ; . ; . : . -:-- : - ; : ; ; ...... i i i i i i i i i i i i i i ...... 8 0 0...... 0 Hsig (m)
PERCENTAGE (of time) EXCEEDANCE OF WAVE HEIGHTS (Hsig) FOR ALL WAVE PERIODS 30 October 1976 to 30 June 1994
Beach Protection Wave Data Recording Program Authority Queensland BRISBANE REGION Figure 2 OueentlWld Oepertment of Eni.Aronment and HerJt•o•
12 Wa ve data recording program, Brisbane Region - 1976-1994 •August 1994 • ISSN 0158-7757 30
25
...... s 20.08 20 '+-< 0
0 ...... � 0.04 0.38 0.33 0.22 O.LI 0.15 0.06 O.ol 0.04 0.()2 0.00
0.25 0.50 0.75 1.00 1.25 1.50 1.75 2.00 2.25 2.50 2.75 3.00 3.25 3.50 3.75 4.00 4.25 4.50 4.75 5.00 5.25 5.50 5.75 Hsig (metres)
25 Winter data
20 1906
...... s '+-< 15 0
Hsig (metres) Summer data 25
...... s '+-< 0 15
� O 0.113 0.24 0.19 0.12 0.o7 0.02 004 0.01 Cl.Cl! 0.00 001 .IKI O.CJO O.IX)
0.25 0.50 0.75 1.CJO 1.25 1.50 1.75 2.00 2.25 2.50 2.75 3.00 3.25 3.50 3.75 4.00 4.25 4.50 4.15 5.00 5.25 5. 50 5.75 6.00 6.25 6.50 6 75 7.IXl Hsig (metres) All data
HISTOGRAM PERCENTAGE (of time) OCCURRENCE OF WAVE HEIGHTS (Hsig) FOR ALL WAVE PERIODS (Tp)
Beach Protection Wave Data Recording Program Authority Queensland BRISBANE REGION Figure 3 OueensJ.nd Department of Environment end Heritage
Wa ve data recording program, Brisbane Region - 1976-1994 •August 1994 •ISSN 0158-7757 13 40 37.63
,...... (l) 30 .§ ...... 2S 0 ..._..
20 8c: (l) I:: IS ::I (.) (.) 10 0 �
0.()C) 1.116 II-'----- II 13 IS
Wave Period (Tp) (secs) Winter data
4S04
40
,...... (l) E ·.:::: 30
'O..._.. (l) (.) c: 2!1
::I� (.) (.) 0 10 ·--··-······-...... -
2.67 IUl2 II -1--�11�1�:.__--'111111111111t 9 11 13 IS Wave Period (Tp) (secs)
40 Summer386S data
3S ------
,...... (l) 30 .§ ...... 2S 0 ..._..
20 8c: (l) I:: IS ::I (.) (.) Ill 0 � 11.03 !UIS 0--'----- 9 II 13 IS Wave Period (Tp) (secs) All data
HISTOGRAM PERCENTAGE (of time) OCCURRENCE OF WAVE PERIODS (Tp) FOR ALL WAVE HEIGHTS (Hsig)
Beach Protection Authority Wave Data Recording Program Queensland BRISBANE REGION Figure 4 au.. ntl#WS O..,ertmant of En�ronmanl and Hentage
14 Wave data recor.ding program, Bris bane Region - 1976-1994 ·August 1994 • ISSN 0158-7757 40 2.5
2.0
"' ·;; J: -;;- 0 20 E 1.5 J: c 0 � E 1.0
0 0.5 1.0 1.5 2.0 2.5 3.0 0 2 3 rotio Hmo1e / Hsig Hs;g (m)
80 1.8
60 1.6
"' ·;; J: ;. 40 � 1.4 J: g � E
20 1.2
0 1.0 0.8 1.0 1.2 1.4 1.6 1.8 0 2 rolio H5ig / Hrms Hs;g (m)
20
15
N
10 �.... 2 .g E
5
0 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 0 5 10 15 ratio Tp / Tz Tp (sec)
40 4
30
-� t::. 20 �2 c 0 � E
10
0 1.0 1.5 2.0 2.5 3.0 0 5 10 15 ratio Tp / Tsig Tp (sec)
WAVE PARAMETER RELATIONSHIPS 30 October 1976 to 30 June 1994
Beach Protection Authority Wave Data Recording Program Q�nsland BRISBANE REGION Figure 5 Oue«laland Oepettmem of Environment•nd Hercage
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- - :::J :::J J J
c c :::J :::J J J
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ro.... ro.... � �
.0 .0 Q) Q) LL LL
DAILY WAVE RECORDINGS � 30 October 1976 to 30 June 1994 -.:h Protection Authority Wave Data Recording Program Queensland BRISBANE REGION Figure 6.1 Oueenaland Oepertment of Environment and Herftage 16 Wa ve data recording program, Brisbane Regio_n - 1976-1994 •August 1994 • ISSN 0158-7757 Q) c: ro .c 5 "> () "' � ()Q) z;:c Q) ·;:::: ------CD 0 0 Q) � � -� (/) > > """"'---- 0 0 z z - <...... -===::::- --=-- ...... () () �-=== 0 � 0 � � -=--- a. a. Q) :rs Q) � (/) (/) � � � __.- > --=-- O> O> � :::I --;::::-- :::I :::::J � :::I J J c: c: :::I J:::::J J >- >- ro ro � � ..... a...... a. ..... ro..... ro � ~ � .c � .c Q) Q) LL LL I'-- c: I'-- ro m -;,,- -i.o 0 LO 0 .!E,,,- ,- a. I- DAILY WAVE RECORDINGS 30 October 1976 to 30 June 1994 Beach Protection Wave Data Recording Program Authority Queensland BRISBANE REGION Figure 6.2 OueentJend Department ofEnvit0nment an.clHer1tag• Wave data recording program, Bris bane Region - 1976· 1994 ·August 1994 • ISSN O 158-7757 17 Q) c: ro ..0 en (.) (.) ·;:: Q) Q) co 0 0 Q) - � > > i:i5 0 0 z z - - (.) (.) 0 0 a. a. Q) Q) CJ) CJ) O> O> :J :J <( <( :J :J "'"") ...., c: c: :J :J "'"") "'"") >- >- ro ro � � a.,_ a.,_ <( <( ro,_ ro,_ � � ..c ..0 Q) Q) LL LL co DAILY WAVE RECORDINGS 30 October 1976 to 30 June 1994 Beach Protection Wave Data Recording Program Authority Figure 6.3 Queensland BRISBANE REGION Oueen1land Oepenment of Environment and H•,i,;age 18 Wave data recording program, Brisbane Region - 1976-1994 ·August 1994 • ISSN 0158-7757 Q) c ro � ..c (.) en Q)(.) Q) ·;:: a:l 3 0 7!i£ 0 Q) - -3- > � > Ci) 0 0 z z - - (.) (.) 0 0 a. a. Q) Q) (f) (f) Ol:l :lOl <( <( :l :l J -:> ~ -:> c c :l :l -=l -:> £ -:> � � >- >- ro ro � � a..... a..... <( <( ro.... ro.... � � � � ..cQ) ..cQ) � !.L � u.. CJ') CJ') c -== 5 c f'-. __:=> f'-. ...-.. rom ro m E -:> T"" -:> T"" -LO ..-:t" (") C\J 0 -..-:t- C\J 0 co co ..-:t" C\J ' 0 T"" T"" T"" .2>en �T""a. I I- DAILY WAVE RECORDINGS 30 October 1976 to 30 June 1994 Beach Protection Wave Data Recording Program Authority Figure 6.4 Queensland BRISBANE REGION Oueenaland Oepenment ot Envin>nment and He,,tage Wa ve data recording program, Brisbane Region - 1976- 1994 •August 1994 • ISSN 0158-7757 19 Q.) c s==> .0cu CJ) (.) (.) ·c c=::: Q.) Q.) co ?; 0 � 0 Q) -$- ==;::: --=-- --- � ..- Cl) / > > � -=:-: - 0 0 z. z - - (.) (.) 0 0 a. a. Q.) Q.) Cl) Cl) O> O> ::J ::J <( <( ::J ::J -, -, c c ::J ::J -, < -, -.,__ >- --=s: >- �� cu cu � � � ...... a. a. ~ <( � <( ...... � cu ��. cu � � - -==== ;::=:s= .0 .0 � Q.) Q.) � LL � LL 0 0 coo coo - cu O> cu O> E -, ,..... -, ,..... -co I!) ">t" C') � ,..... 0 (i;'">t" (\J 0 (X) co ">t" (\J 0 .Q> .._.. ,..... ,..... ,..... CJ) a. I I- DAILY WAVE RECORDINGS 30 October 1976 to 30 June 1994 Beach Protection Wave Data Recording Program Authority Figure Queensland BRISBANE REGION 6.5 20 Wave data recording program, Brisbane Region - 1976- 1994 ·August 1994 •ISSN 0158-7757 Q) c as � ..c --- -====-- en Q) Q) ·;;:: (.) (.) co f 0 z==- 0 Q) ...... � - > > U5 --::::::_ 0 0 � z � z < - ...... � 0(.) � 0(.) 0.. 0.. Q) Q) Cl) Cl) O'l O'l :::::l :::::l <( <( :::::l :::::l ...., ...., c c :::::l :::::l ...., ...., >. >. as as � � .....0...... 0.. <( <( .....as .....as � � .�· � � ..c ..cQ) � Q) ;;,:;> LL LL ---==== -=? � � c co c co - as m as m E --,� --,� - C\J 0 1.0 0 LO 0 -1.0O'l v ct) � !!!.-� � "(j) 0.. I I- DAILY WAVE RECORDINGS 30 October 1976 to 30 June 1994 Beach Protection Wave Data Recording Program Authority Figure Queensland BRISBANE REGION 6.6 OuHnaland Oepettment of Envlronm•nt and Heritage Wave data recording program, Brisbane Region - 1976-1994 •August 1994 · ISSN 0158-7757 21 Q) c: � .0 u (/) Q)u Q) ·;:: co 0 0 Qj - > > Ci5 0 0 z z - - u u 0 0 a. c.. Q) Q) (J) (J) .O> 0) ::J ::J c:i:: c:i:: ::J ::J ...., ...., c: c: ::J ::J ...., ...., >- >- � � ::? ::? c..,_ c..,_ c:i:: c:i:: ,_ ,_ � � ::? ::? .0 .0 Q) Q) u. .:?- u. �� C\I C\I c: co c: co � O> ....,� O> T"" ...., T"" 0 (i)LO 0 LO 0 -T"" T"" c.. I- DAILY WAVE RECORDINGS 30 October 1976 to 30 June 1994 Beach Protection Authority Wave Data Recording Program Queensland BRISBANE REGION Figure 6.7 OufffWendO•pertment o1 Em.1ronm.m endH•,••o• 22 Wave data recording program, Brisbane Region - 1976-1994 • August 1994 • ISSN 0158-7757 Q) c «S ..0 (.) (/) Q)(.) Q) ·;:: co 0 0 (ri � ...... � > ----=- > i:i5 0 0 1 z � z ...... (.) (.) 0 � 5 0 � >� 0. 0. Q) Q) (/) (/) O> O> ::::l ::::l <( <( ::::l """) c c ::::l ::::l """) """) ...... 0. 0. <( <( ..0 ..0 Q) Q) u. u. ct) c co «S O> L______JL______JL,______J-=-__J�_____JL--_____J J -r- ct) C\I -r- 0 (i)LO 0 ..__.. -r- -r- 0. I- DAILY WAVE RECORDINGS 30 October 1976 to 30 June 1994 Beach Protection Authority Wave Data Recording Program Queensland BRISBANE REGION Figure 6.8 Ou� Oepenment of Environmenl end Herd.8ge Wave data recording program, Brisbane Region - 1976- 1994 •August 1994 •ISSN 0158-7757 23 Q) c ro .0 () () ·c(/) Q) Q) a:l 0 0 Q) ..... > > U5 0 0 z z .....() .....() 0 �-Zi7 0 0... 0... Q) Q) (fJ �· (fJ =- O> O> ::::J ::::J <( <( ::::J ::::J -, -, c c ::::J ::::J -, -, >- >- ro ro � � 0...... 0...... <( <( -s- ro.... � ro.... � � � � .0 .0 � Q) Q) LL LL '<;f" '<;f" c co c co - ro m ro m E -, T'"" -, T'"" -co lO ..q- Cl) T'"" 0 -o lO 0 lO 0 C\I T'"" T'"" .!2>(/) �C\I0... I I- DAILY WAVE RECORDINGS 30 October 1976 to 30 June 1994 Beach Protection Authority Wave Data Recording Program Queensland · BRISBANE REGION Figure 6.9 Oueenatand Oepanment or Environment and Herlt•o• 24 Wave data recording program, Brisbane Region - 1976-1994 ·August 1994 • ISSN 0158-7757 Q) ct!c: .0 en (.) (.) ·;:: Q) Q) Ill 0 0 Q) .� CJ) > > 0 0 z z - - ::==- (.) § (.) 0 0 a. a. Q) Q) CJ) CJ) 0) 0) ::l ::l <( <( ::l ::l """") """") c: c: ::l ::l """") """") >. >. ct! ct! ::? ::? a...... a...... <( <( ...... ct!...... ct! ::? ::? .0 .0 Q) Q) LL LL l{) l{) c: co c: co - ct! 0) ct! 0) E """") ..- """") ..- -..q- 0 (j)'l{) 0 l{) 0 0) ...... - ..- "Ci) a. I I- DAILY WAVE RECORDINGS 30 October 1976 to 30 June 1994 Beach Protection Authority Wave Data Recording Program Queensland BRISBANE REGION Figure 6.1 0 Ou .. ntland Department of Environment and Herrtagt Wave dqta recording program, Brisbane Region - 1976- 1994 • A:Jgust 1994 • ISSN 0158-7757 25 Q) c ..Q� en (.) (.) ·;:: Q) Q) co Cl Cl Q) ...... > > U5 0 0 z · z ...... (.) (.) 0 0 a. a. Q) Q) Cf) ::ii= Cf) O> O> :::J :::J <( <( :::J :::J ...., ...., c c :::J :::J ...., ...., c :::£: >- >- � � � � � ...... c.. c.. <( <( ...... � � � � =:e:- ..Q ..Q Q) Q) LL LL co co CCX> CCX> - � O> �O> ...., ,...... , ,.... E 0 .._.."""' C\J 0 ...-..LO 0 LO O> ,.... "(i) �a...... I I- DAILY WAVE RECORDINGS 30 October 1976 to 30 June 1994 Beach Protection Authority Wave Data Recording Program Queensland BRISBANE REGION Figure 6.1 1 Oueent.1W1d Oepenment ot Environment and Heritage 26 Wave data recording program, Brisbane Region - 1976-1994 •August 1994 • ISSN O 158-7757 Q) c co ..c en () () ·c Q) Q) co � Cl D Qj - > =C > Ci) 0 0 ? z ::;;;--- z � - - () () 0 0 a. a. Q) Q) Cf) Cf) 0) 0) ::J ::J ::J -:> c ::J -:> a...... ..c Q) LL DAILY WAVE RECORDINGS 30 October 1976 to 30 June 1994 Beach Protection Authority Wave Data Recording Program Queensland BRISBANE REGION Figure 6.1 2 Oueenet.nd Oepanmenc ofEn't'ironment andHeritage Wave data recording program, Brisbane Region - 1976·1994 •August 1994 • ISSN 0158-7757 27 Q) roc: ..0 (/) (.) (.) ·;;:: Q) Q) co 0 0 Qi - > - > -, U5 :::=- 0 0 z z 2 - - Ji (.) (.) 0 0 c.. c.. Q) Q) en en Cl Cl � :J :J <( --;¥;:: <( :J :J -, -, c: c: :J :J -, ...-- -, >- >- ro ro :: :: c...... c...... <( <( --= - ro..... ro..... :: :: ..0 ..0 Q) Q) L1. L1. DAILY WAVE RECORDINGS 30 October 1976 to 30 June 1994 Beach Protection Wave Data Recording Program Authority Figure Queensland BRISBANE REGION 6.1 3 QuHftajM(ID*Peflm•nt of Erwironmenl andHetitao• 28 Wa ve data recording program, Brisbane Region - 1976- 1994 ·August 1994 •ISSN 0158-7757 Q) c ...:;?' Ctl ..c � (..) (..) "' Q) Q) ·;:: 0 cc .-"" 0 -:::: Q) � (J) > > < 0 ==:: 0 z z � � - s - (.) (..) 0 0 c.. c.. Q) Q) (J) (J) O'> O'> :::J .._,,____ :::J � <( z= <( :::J :::J ~ --:> � --:> c c :::J :::J --:> E --:> >- >- Ctl Ctl :::? ~ :? .....c.. c...... <( -? <( Ctl..... Ctl..... :? :::? ..c ..c Q) Q) � u. � u. 0) 0) ccx:> ccx:> - Ctl 0) Ctl 0) E --:> T""" --:> T""" -co 0 -L{) 0 L{) 0 �T""" T""" .!2'"' c.. I � DAILY WAVE RECORDINGS 30 October 1976 to 30 June 1994 Beach Protection Authority Wave Data Recording Program Queensland BRISBANE REGION Figure 6.14 Oueenaland Department of Envtronment end H•rrtag• Wave data recording program, Brisbane Region - 1976-1994 •August 1994 • ISSN 0158-7757 29 s= ze:;- - � --= - 0(.) 0(.) ::? a. � a. ==--- ::J ::J "'"") "'"") c: c: ::J ::J "'"") "'"") , >. >. � � st= � s;- � � ..... a...... a. <( <( ...... � � � � .0 .0 � 0 c: O> � O> ..- -LO 0 0 "'"") ..- .!!!,,..-a. I- DAILY WAVE RECORDINGS 30 October 1976 to 30 June 1994 Beach Protection Authority Wave Data Recording Program Queensland BRISBANE REGION Figure 6.1 5 Oueenslend Oepettm•nt of En\lfronment and Henlag• 30 Wave data recording program, Brisbane Region - 1976-1994 •August 1994 • ISSN 0158-7757 Q) I I I 1� 1 I I I c I I I� I ctl � .n u (/) Q)u Q) ·;:: co 0 0 Q) £ � - > > i:f.j 0 0 z z ---=------ - - . u u -� 0 � 0 c. c. Q) Q) Cf) s:-" Cf) � - :±:E: 0) 0) ::J � ::J � - :£ - - ::J ---.i:; J::J � J � c c :::=- ::J ::J J � J �- >- -e_ >- - ctl #" ctl :? :? ,_ � c.,_ � c. < :::=-.....- ,_ ,_ ctl ctl :? :? � � .n .n 4 � Q) Q) = .:===.-. LL LL ..- \ ...... c 0) c 0) - -7 ctl 0) ctl 0) I -, ...... E I I I I I I I J ..- I I I 1. I I --.:;t- N o · -o LO...... 0...... LO 0 "(i)0) �Nc. I I- DAILY WAVE RECORDINGS 30 October 1976 to 30 June 1994 Beach Protection Authority Wave Data Recording Program Queensland BRISBANE REGION Figure 6.16 OuHn1land Oepanmenf ot Environment and Heritage Wa ve data recording program, Brsbanei Region - 1976-1994 ·August 1994 · ISSN 0158-7757 31 Q) c ro ..c (.) en Q)(.) Q) ·;::: co 0 0 Q) :-=:: (f) > > 0 0 z z - - (.) (.) 0 0 c.. c.. Q) Q) (f) (f) C> C> ::::i ::::i <( <( J::::i J::::i c c ::::i ::::i J J >. >. ro ro � � c...... c...... <( <( ro...... ro � � ..c ..c Q) Q) u. u. � C\J C\J CO'> CO'> ...... ro a> ro a> J T""" E J T""" -c.o LO ..q- ('I) C\J T""" 0 ...... 0 LO 0 LO 0 C> �C\J T""" T""" ·u; c.. I I- DAILY WAVE RECORDINGS 30 October 1976 to 30 June 1994 Beach Protection Authority Wave Data Recording Program Queensland BRISBANE REGION Figure 6.17 Ou ..nsland Oepanmenl of En\Aronmenl and Heritage 32 Wave data recording program, Brisbane Region - 1976- 1994 •August 1994 • ISSN o 158-7757 <1> c: ell .0 "' (.) (.) ·c Q) Q) co 0 0 Q) - > > U5 0 0 z z - - � (.) ]£ (.) 0 0 � a. a. Q) Q) Cl) Cl) 0) 0) ::J ::J <{ <{ ::J ::J ...., ...., c: c: ::J ::J ...., ...., >- >- ell ell � � a...... a...... <{ <{ ..... ell..... ell � � .0 .0 Q) Q) LL LL Cf) Cf) c: CJ) c: CJ) ...... ell CJ) ell CJ) E ...., T""" ...., T""" '--'CO 0 -o LOT""" 0T""" LO 0 "Ci)0) �C\Ja. I I- DAILY WAVE RECORDINGS 30 October 1976 to 30 June 1994 Beach Protection Authority Wave Data Recording Program Queensland BRISBANE REGION Figure 6.18 Oueenaland Dep11rtmenr of Environm•nt and Heritage Wave data recording program, Brisbane Region - 1976-1994 •August 1994 • ISSN 0158-7757 33 Q) c: ctS .0 en u u ·c Q) Q) co 0 0 -Qj > > U5 --_£ 0 0 z z - - u u 0 0 0. 0. Q) Q) Cf) Cf) C> C> ::J ::J <( <( E s: ::J ::J -:> -:> c: ::Jc: � ::J -:> -:> >. >. ctS ctS � � ...... 0. 0. <( <( ...... ctS ctS � � .0 .0 Q) Q) u. u. .q- v c: O> c: O> ...... ctS O> ctS O> -:> ..- ..- E -:> -co lO .q- Ct) N ..- 0 -o lO 0 lO 0 C> �N ..- ..- ·en 0. ::r: I- DAILY.WAVE RECORDINGS 30 October 1976 to 30 June 1994 Beach Protection Authority Wave Data Recording Program Queensland BRISBANE REGION Figure 6.19 34 Wa ve data recording program, Brisbane Region - 1976· 1994 ·August 1994 • ISSN O 158-7757 170' 150' 160' 10' / Cairns 20' ,, ·-· \ " -� ·· �-- 30' 170' 150' 160' KEY TO CYCLONES N /V CLIFF ___,'"·--,;·'·· FRAN /' / / v ABIGAIL /\/ ROGER '· ,. '/ AIVU /V REWA 1 /V BETSY /V NANCY /\/ DAMAN Cyclone Tracks Beach Protection Authority Wave Data Recording Program Queensland Figure 7 Queensland D•pertment of Environment and Heritage BRISBANE REGION Wa ve data recording program, Brisbane Region - 1976-1994 •August 1994 • ISSN O 158-7757 35 36 Wave data recording program, Brisbane Region - 1976-1994 •August 1994 • ISSN O 158-7757 I .