Minnegang Creek Flood Study Report - Wollongong City Council

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555053.09RANCHBY AVEElevation (m AHD)4540353047.7247.6241.9539.8438.4434.7731.8030.23LAKE HEIGHTS CULVERTBARINA AVEBARINA PARK DETENTIONBASIN EMBANKMENTMIRRABOOKA RD2527.3426.9326.3025.7725.4127.7827.5826.9826.9825.7924.4024.1526.6126.8126.612021.5820.6620.6119.0115-0.1 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0Chainage (km)Elevation (m AHD)3530252015105019.01WERINGA AVE17.0616.7112.8012.8010.079.368.71JANE AVE BRIDGE8.548.547.507.475.244.843.883.222.651.981.610.881.081% AEP flood levelGlobal roughness: 0.02Global roughness: 0.007U/s of properties: n=0.15Invert levelChainage0.60NORTHCLIFFE DR CULVERT0.400.550.57ILLAWARRA YACHT CLUB CULVERT0.450.40-0.05-51.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2.0 2.1Chainage (km)Figure 5-4HYDRAULIC ROUGHNESS SENSITIVITYMINNEGAN BRANCHMinnegang Creek Flood Study
555053.09RANCHBY AVEElevation (m AHD)4540353047.7247.6241.9539.8438.4434.7731.80LAKE HEIGHTS CULVERT30.23BARINA AVEBARINA PARK DETENTIONBASIN EMBANKMENTMIRRABOOKA RD2527.3426.9326.3025.7725.4127.7827.5826.9826.9825.7924.4024.1526.6126.8126.612021.5820.6620.6119.0115-0.1 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0Chainage (km)35Base caseElevation (m AHD)3025201510519.01WERINGA AVE17.0616.7112.8012.8010.079.368.71JANE AVE BRIDGE8.548.547.507.47PMF tailwater level50% AEP tailwater levelInvert levelChainageNORTHCLIFFE DR CULVERTILLAWARRA YACHT CLUB CULVERT05.244.843.883.222.651.981.610.881.080.600.400.550.570.450.40-0.05-51.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2.0 2.1Chainage (km)Figure 5-5TAILWATER LEVELS SENSITIVITYMINNEGAN BRANCHMinnegang Creek Flood Study
Page 1 and 2: Minnegang CreekFlood Study
Page 3: © Kellogg Brown & Root Pty Ltd, 20
Page 6 and 7: SummaryThis report presents the det
Page 8 and 9: The RatHGL modelling indicated that
Page 10 and 11: 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: 5.9 MODEL SENSITIVITY ANALYSESSensi
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 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:
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Minnegang Creek Flood Study Report - Wollongong City Council

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