Minnegang Creek Flood Study Report - Wollongong City Council

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RL (m)3433.53332.53231.53130.53029.5291.0 m/s2%1% AEP velocities and flow distribution1.4 m/s43%2.0 m/s44%1.1 m/s14%40 50 60 70 80 90 100Offset (m)RL (m)3433.53332.53231.53130.53029.5290.9 m/s2%2% AEP velocities and flow distribution1.4 m/s43%1.6 m/s45%1.1 m/s14%40 50 60 70 80 90 100Offset (m)5% AEP velocities and flow distribution20% AEP velocities and flow distribution343433.533.53333RL (m)32.53231.5310.9 m/s2%1.4 m/s45%1.5 m/s45%1.1 m/s13%RL (m)32.53231.5311.4 m/s41%1.7 m/s48%1.1 m/s11%30.530.5303029.529.52940 50 60 70 80 90 100Offset (m)2940 50 60 70 80 90 100Offset (m)Figure 6-12VELOCITY AND FLOW DISTRIBUTIONSMELINDA 0.328Minnegang Creek Flood Study
6.2 RESULTS OF THE RATHGL MODELLINGThe RatHGL modelling indicates that the capacity of most of the piped drainagesystem is restricted by the capacities of the stormwater inlets.To determine the capacity of the pipes, the stormwater pits in the system wereassumed to have an unlimited inlet capacity. The capacity of the piped drainagesystem, assuming the inlet capacities of the system were not limiting, is presented inTable 6-2. The layout and naming of the pipe system is shown inSV8507-D0-001 Rev 2 6-5118/10/02
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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
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The RatHGL modelling indicated that
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FIGURESSectionPageFigure 2-1 Catchm
Page 12 and 13: ABBREVIATIONSAEPAHDARIAR&RDCPIFDLEP
Page 14 and 15: 2 Catchment DescriptionThe Minnegan
Page 16: Figure 2.1CATCHMENT AND STUDY AREAM
Page 20 and 21: Illawarra Flood Study investigated
Page 23 and 24: The catchment was divided into 64 s
Page 25 and 26: 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 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 80 and 81: Appendix CHistorical Flood DataRECO
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
Page 111 and 112: BRANCH CHAINAGE PMF 1% AEP 2% AEP 5
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BRANCH CHAINAGE PMF 1% AEP 2% AEP 5
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Minnegang Creek Flood Study Report - Wollongong City Council

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