Flood Management Plan - Shire of Yarra Ranges

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Figure 29Flood Risk within the Shire of Yarra Ranges (from Melbourne Water Flood Matrix)44 Melbourne Water Shire of Yarra Ranges Flood Management Plan
7.2 Existing Flood Risks within the MunicipalityFlood modelling undertaken by Melbourne Water to date has identifiedapproximately 6,043 properties within the Shire of Yarra Ranges that areaffected 1 by 100 year ARI flooding from waterways and overland flows.Many of the high flood risk areas are associated with flooding are from majorwaterways. The drainage system both Council’s and Melbourne Water’s isbuilt to national standards and for most storm events does a good job.Stormwater systems today are generally designed to cater for a 1-in 5 yearARI and when an event beyond this occurs the overflow will follow the naturalvalleys of the land either along reserved floodplains, channels and roads. Insome suburbs in the municipality unfortunately this overflow can be throughexisting developed properties.Many suburbs were developed in a similar era where the undergrounddrainage network was constructed without consideration of overland flowpaths for when runoff from severe storms exceeds the capacity of theunderground drainage system.7.3 Future Flood Risks – Long-Term Future Pressures on ExistingDrainage Systems7.3.1 Greenfields Development and Urban ExpansionConsistent drainage design following ‘Australian Rainfall and Runoff’ (Council’sfavoured drainage design guidelines) and Melbourne Water’s ‘LandDevelopment Manual’ along with planning and building provisions within theShire of Yarra Ranges Planning Scheme will ensure that future developmentwithin the Municipality is designed and constructed to current drainagestandards that adequately provide new drainage infrastructure that suitablymanages the flood risk.Figure 30 shows the Urban Growth Boundary (UGB) within the Shire of YarraRanges and the land areas that have been included in the UGB since 2005.The UGB defines areas where urban growth will be encouraged within YarraRanges, clearly showing land that is designated urban, to be used for housing,industry and commerce, from that which is non-urban.All land within the UGB can expect urban growth leading to the year 2030 inline with the Victorian Governments ‘Melbourne 2030’ policy. If not properlymanaged, development in these areas has the potential to impact the qualityof drainage service currently provided by Melbourne Water and Council. It is1Affected properties refers to properties where inundation occurs in the 100 year ARI event, regardless of whether it is abovefloor flooding or not.Melbourne Water Shire of Yarra Ranges Flood Management Plan 45
Page 1 and 2: Flood Management PlanFor Shire of Y
Page 3 and 4: Table of Contents1 Executive Summar
Page 5 and 6: 1 Executive SummaryThis Shire of Ya
Page 7 and 8: Figure 1Flood Management Roles and
Page 9 and 10: ability to respond in an informed a
Page 11 and 12: Figure 2Shire of Yarra Ranges ward
Page 13 and 14: Figure 3Main waterways within the S
Page 15 and 16: 6.4 FloodingFor the purposes of thi
Page 17 and 18: Figure 5100 Year Flood Extent, Shir
Page 19 and 20: Figure 6Study Areas within the Shir
Page 21 and 22: YarraRiver TribDonRiverYarra RiverB
Page 23 and 24: WooriYallockCreekHoddlesCreekSlatyC
Page 25 and 26: MuddyCreekFigure 11Cardinia Creek S
Page 27 and 28: • Bungalook Creek is located in t
Page 29 and 30: OlindaCreekLilydaleEastDrainLogCree
Page 31 and 32: NewChumCreekMyersCreekDonnellyCreek
Page 33 and 34: SteelsCreekDixonCreekPaulsCreekFigu
Page 35 and 36: 6.7.1 Drainage & Assets Investigati
Page 37 and 38: Figure 24Customer Complaints - Shir
Page 39 and 40: Figure 26Engineering Studies - Shir
Page 41 and 42: Emerald SES unit which is located o
Page 43: BIG PATS CREEK 5840 MediumMISSISSIP
Page 47 and 48: 7.3.2 Urban Consolidation and Infil
Page 49 and 50: information to support Flood Emerge
Page 51 and 52: The extents for the 1% AEP event ha
Page 53 and 54: waterways and overland flows within
Page 55 and 56: een and should be taken. This inclu
Page 57 and 58: fund the required drainage upgrades
Page 59 and 60: • To regulate or prohibit any use
Page 61 and 62: 10 Improvement PlanThis Part of the
Page 63 and 64: 567Little known about recreationfac
Page 65 and 66: 161718Location of complaints caninf
Page 67 and 68: 12 How this document was developedT
Page 69 and 70: 13.1 GLOSSARYBelow are terms define
Page 71 and 72: ID Waterway Name ID Waterway Name I
Page 73 and 74: ID Waterway Name ID Waterway Name I
Page 75 and 76: Melbourne Water Shire of Yarra Rang
Page 77 and 78: Melbourne Water Shire of Yarra Rang
Page 79 and 80: APPENDIX B - ROLES AND RESPONSIBILI
Page 81 and 82: APPENDIX C - FLOOD RISK ASSESSMENTB
Page 83 and 84: APPENDIX D - FARM DAMS IN THE SHIRE
Page 85: APPENDIX E - MELWAYS MAPS SHOWING 1
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86 Melbourne Water Shire of Yarra R
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Flood Management Plan - Shire of Yarra Ranges

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