Minnegang Creek Flood Study Report - Wollongong City Council

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Appendix CHistorical Flood DataRECORDED FLOOD LEVELSFigure C-1 is a catchment plan with recorded flood levels for the following storm events:• 14 December 1985• 23 October 1987• December 1990• 17 August 1998RAIN GAUGE LOCATIONSFour rain gauge stations are located in the vicinity of the Minnegang Creek catchment. The gauges andthe organisations that operate them are as follows:• Berkeley B44 gauge (Sydney Water)• Port Kembla SPS 176 gauge (Sydney Water)• Port Kembla (Manly Hydraulics Laboratory)• Station 68110 Northcliffe Drive, Berkeley (Bureau of Meteorology)The first three of these gauges are continuously monitoring stations. Rainfall is available in five minuteincrements at each of the stations. Rainfall is only available in daily increments for the Bureau ofMeteorology station.The locations of these gauges in relation to the Minnegang Creek catchment are shown in Figure C-2.SV8507-DO-001 Rev 2 C-118/10/02
RAINFALL - 17 AUGUST 1998 CALIBRATION EVENTRainfall from the Berkeley B44 gauge was used for the generating hydrographs for the 17 August 1998storm event. This gauge was chosen as it is the closest gauge to the Minnegang Creek catchment of thecontinuously monitoring gauges listed above. The rainfall recorded at this gauge, for this event is asfollows:Gauge Name: Berkeley B44 (Sports and Social Club)Data Source: Sydney WaterTime of Collection: 9:00am on the 17/8/98 to 9:00am on the 18/8/98Time Rain(mm)Time Rain(mm)Time Rain(mm)Time Rain(mm)Time Rain(mm)9:05 1 11:50 0.5 14:35 0.5 17:20 1.5 20:05 49:10 1 11:55 0.5 14:40 0.5 17:25 0.5 20:10 39:15 0.5 12:00 0 14:45 0.5 17:30 1.5 20:15 1.59:20 0.5 12:05 0.5 14:50 0.5 17:35 1 20:20 1.59:25 0.5 12:10 0.5 14:55 1 17:40 1.5 20:25 19:30 1.5 12:15 0.5 15:00 0.5 17:45 0.5 20:30 0.59:35 0 12:20 1.5 15:05 0.5 17:50 0.5 20:35 09:40 1 12:25 1 15:10 0.5 17:55 0 20:40 0.59:45 1 12:30 1.5 15:15 1.5 18:00 0.5 20:45 0.59:50 1 12:35 1 15:20 0.5 18:05 1 20:50 0.59:55 0.5 12:40 1 15:25 0.5 18:10 1 20:55 110:00 1.5 12:45 1 15:30 0.5 18:15 1 21:00 1.510:05 1 12:50 1 15:35 0.5 18:20 2 21:05 0.510:10 1.5 12:55 0.5 15:40 0.5 18:25 2 21:10 110:15 1 13:00 1 15:45 0.5 18:30 1 21:15 0.510:20 1 13:05 0 15:50 0 18:35 0 21:20 0.510:25 0 13:10 0 15:55 0.5 18:40 0.5 21:25 0.510:30 1 13:15 0.5 16:00 0.5 18:45 1 21:30 0.510:35 0.5 13:20 0 16:05 0.5 18:50 2 21:35 110:40 0.5 13:25 0.5 16:10 1 18:55 1 21:40 0.510:45 1 13:30 0 16:15 0.5 19:00 1.5 21:45 0.510:50 1 13:35 0.5 16:20 1 19:05 0.5 21:50 1.510:55 0.5 13:40 0.5 16:25 0.5 19:10 1 21:55 0.511:00 0.5 13:45 0 16:30 0.5 19:15 1 22:00 0.511:05 1 13:50 0.5 16:35 0.5 19:20 1 22:05 111:10 0.5 13:55 0.5 16:40 0.5 19:25 1 22:10 0.511:15 1.5 14:00 0 16:45 0.5 19:30 3 22:15 0.511:20 1 14:05 0.5 16:50 1 19:35 4 22:20 011:25 0.5 14:10 0.5 16:55 0.5 19:40 7.5 22:25 0.511:30 1 14:15 0.5 17:00 1 19:45 4.5 22:30 011:35 0.5 14:20 0.5 17:05 1 19:50 6.5 22:35 011:40 1 14:25 0 17:10 1 19:55 4 22:40 011:45 0.5 14:30 0.5 17:15 1 20:00 6 22:45 0SV8507-DO-001 Rev 2 C-218/10/02
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Minnegang CreekFlood Study
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© Kellogg Brown & Root Pty Ltd, 20
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SummaryThis report presents the det
Page 8 and 9:
The RatHGL modelling indicated that
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FIGURESSectionPageFigure 2-1 Catchm
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ABBREVIATIONSAEPAHDARIAR&RDCPIFDLEP
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2 Catchment DescriptionThe Minnegan
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Figure 2.1CATCHMENT AND STUDY AREAM
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Illawarra Flood Study investigated
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The catchment was divided into 64 s
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To determine the peak flow from the
Page 27 and 28:
5 Hydraulic Modelling5.1 INTRODUCTI
Page 29: Table 5-1 MIKE 11 river branchesBra
Page 32 and 33: elationship that is determined from
Page 34 and 35: interaction between the numerical m
Page 36 and 37: significantly affected since the ex
Page 38 and 39: Since Points A and B correspond to
Page 41 and 42: 5.9 MODEL SENSITIVITY ANALYSESSensi
Page 43 and 44: 555053.09RANCHBY AVEElevation (m AH
Page 45 and 46: Creek and pass directly over Northc
Page 47: 5.12.4 Overland flow pathsAs discus
Page 50 and 51: Table 6-1 Peak design dischargesBra
Page 52 and 53: 55.050.0PMF Flood Level1% AEP Flood
Page 58 and 59: 1% AEP velocities and flow distribu
Page 60 and 61: 2524.52423.5RL (m)231% AEP velociti
Page 62 and 63: RL (m)3433.53332.53231.53130.53029.
Page 64 and 65: Figure 5-6.Table 6-2 Piped drainage
Page 66 and 67: that handrails above these structur
Page 68 and 69: flooding within the catchment are n
Page 70 and 71: 35.01% AEP flood level - blocked ca
Page 72 and 73: 20.01% AEP flood level - blocked ca
Page 74 and 75: Appendix AReferencesBureau of Meteo
Page 76 and 77: Appendix BGLOSSARYSV8507-DO-001 Rev
Page 78 and 79: hydraulicshydrographhydrologyMIKE 1
Page 82 and 83: Time Rain(mm)Time Rain(mm)Time Rain
Page 85 and 86: Appendix DRAFTS HYDROLOGIC MODELSV8
Page 87 and 88: MHE .5359 .3573 12.10 12.10 5.000 1
Page 89 and 90: Mannings n 0.025 0.025 0.025 0.025
Page 91 and 92: Mannings n 0.025 0.025 0.025 0.025
Page 93 and 94: MH94 67.500 15.00 1.500 2.500 .0000
Page 95 and 96: Appendix EMIKE 11 HYDRAULIC MODELSV
Page 97 and 98: EXIST ; DENISE2 ; 0.005; 0.133; 100
Page 99 and 100: 22.40; 88.40;23.30; 100.00;25.10; 1
Page 101 and 102: 27.26; 128.96;27.43; 137.64;28.08;
Page 103 and 104: 1; 1.250;0;1.800; 1.250; 0.000; 0.0
Page 105 and 106: PIPE_10; 0.108; EXIST;57.000; 159.0
Page 107 and 108: Appendix FMIKE11 RESULTS SUMMARYThi
Page 109 and 110: BRANCH CHAINAGE PMF 1% AEP 2% AEP 5
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Minnegang Creek Flood Study Report - Wollongong City Council

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