20250526 17404600 1.0 FALSE MelbourneWater_1PCT_FloodExtent 002 Projected GDA2020 Linear Unit: Meter (1.000000) GDA2020_MGA_Zone_55 <ProjectedCoordinateSystem xsi:type='typens:ProjectedCoordinateSystem' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xmlns:xs='http://www.w3.org/2001/XMLSchema' xmlns:typens='http://www.esri.com/schemas/ArcGIS/2.8.0'><WKT>PROJCS[&quot;GDA2020_MGA_Zone_55&quot;,GEOGCS[&quot;GDA2020&quot;,DATUM[&quot;GDA2020&quot;,SPHEROID[&quot;GRS_1980&quot;,6378137.0,298.257222101]],PRIMEM[&quot;Greenwich&quot;,0.0],UNIT[&quot;Degree&quot;,0.0174532925199433]],PROJECTION[&quot;Transverse_Mercator&quot;],PARAMETER[&quot;False_Easting&quot;,500000.0],PARAMETER[&quot;False_Northing&quot;,10000000.0],PARAMETER[&quot;Central_Meridian&quot;,147.0],PARAMETER[&quot;Scale_Factor&quot;,0.9996],PARAMETER[&quot;Latitude_Of_Origin&quot;,0.0],UNIT[&quot;Meter&quot;,1.0],AUTHORITY[&quot;EPSG&quot;,7855]]</WKT><XOrigin>-5120900</XOrigin><YOrigin>1900</YOrigin><XYScale>10000</XYScale><ZOrigin>-100000</ZOrigin><ZScale>10000</ZScale><MOrigin>-100000</MOrigin><MScale>10000</MScale><XYTolerance>0.001</XYTolerance><ZTolerance>0.001</ZTolerance><MTolerance>0.001</MTolerance><HighPrecision>true</HighPrecision><WKID>7855</WKID><LatestWKID>7855</LatestWKID></ProjectedCoordinateSystem> 20230619 editor:arcpy_metadata ISO19139 11454000 ISO 19139 Metadata Implementation Specification 20230619 11454000 As Required Ongoing HTTP https://www.melbournewater.com.au/ Melbourne Water's Website Melbourne 3008 VIC enquiry@melbournewater.com.au Australia 8:30am-5pm 131722 Melbourne Water Corporation FloodInundationMapping, FloodExtent Melbourne Water Flood Extent withheld withheld MW_FL_FLOOD_EXTENT Greater Melbourne Spatial Data Layer withheld This feature class contain potential extent of inundation for the different flood events (1%, 2%, 5%, 10%, and 20% AEPs) associated with Underground Drains, Waterways, and Coastal (from Port Phillip and Westernport Bay) flood type associated with Melbourne Water Flood Management. The flood extent is a result of modelling studies under existing/base case conditions scenario flood event, and climate change 1% scenario by 2040, 2070 and 2100. FloodInundationMapping, FloodExtent Melbourne Water Corporation This layer is used for risk assessment, strategic planning and emergency response and, more specifically, to identify properties and buildings that may be subject to inundation for the different flood event (1%, 2%, 5%, 10%, and 20%). This layer supports Melbourne Water's responsibilities as the Floodplain Management Authority for the Port Phillip and Westernport region, by helping to identify and minimise all currently known flooding risks to public health and safety, property and infrastructure and by increasing community understanding and preparedness for floods via flood risk mapping, flood mitigation, drainage and waterways management and flood warning activities. Flood Mapping Active Esri ArcGIS 12.8.3.29751 MW Data initially captured by digitising flood extents and flood contours from hardcopy plans (flooding from waterways during 20 year, 50 year and 100 year ARI rainfall event) in 1998. Data captured via Drainage Survey Project 1996/97 (mapping of flooding from underground systems during 20 year, 50 year and 100 year ARI rainfall event). Data Consistency Project then undertaken in 2000/01 to complete second stage of flood studies and capture. Since that time, flood studies have been progressively carried out and used to map and update flood extents, as part of the flood mapping program and flood management strategy (to identify areas of flooding and minimise flood risk). Studies are carried out internally by Melbourne Water staff or externally by consultants, with the date of the study, study name, source and method of calculation (RORB, Tuflow, XP-Storm, Mike II, Survey, Lidar, contours etc) captured against each flood shape. The flood extents are updated when new information is received from flood mapping projects, post flood mitigation mapping projects, Developer works or certified survey plans. The new flood extent is accepted by the Melbourne Water team managing the project. After acceptance the new flood extent is sent to Melbourne Water GIS team who will remove the superseded flood extent and add the new flood extent to the GIS. This dataset is part of a package of data that contains flood extent, contour and spot height features derived from various flood studies, reports, plans and imagery, and includes both modelled and observed data. Melbourne Water's flood modelling data comprises 3 main data groups as follows: Modelled Flood Extents: Extent_{n}%_AEP, where n = 1, 2, 5, 10, 20 % Annual Exceedance Probability. Modelled Flood Contours: Contour_{n}%_AEP, where n = 1, 2, 5, 10, 20 % Annual Exceedance Probability. ESRI File-Geodatabase https://www.melbournewater.com.au/ HTTP Melbourne Water's Website Feature Class 0 OBJECTID OBJECTID OID 4 0 0 Internal feature number. Esri Sequential unique whole numbers that are automatically generated. Shape Shape Geometry 0 0 0 Feature geometry. Esri Coordinates defining the features. STUDY_FID STUDY_FID Integer 4 0 0 STUDY_NAME STUDY_NAME String 30 0 0 UPSTREAM_LIMIT UPSTREAM_LIMIT String 40 0 0 DOWNSTREAM_LIMIT DOWNSTREAM_LIMIT String 40 0 0 STUDY_BY STUDY_BY String 30 0 0 STUDY_DATE STUDY_DATE Date 8 0 0 ACCEPTED_ON ACCEPTED_ON Date 8 0 0 ACCEPTED_BY ACCEPTED_BY String 30 0 0 SURVEY_SOURCES SURVEY_SOURCES String 30 0 0 CALCULATION_METHOD CALCULATION_METHOD String 50 0 0 FLOOD_TYPE FLOOD_TYPE String 50 0 0 FLOOD_EVENT FLOOD_EVENT String 50 0 0 MODELLING_SCENARIO MODELLING_SCENARIO String 80 0 0 COMMENTS COMMENTS String 150 0 0 FLOOD_STUDY_1PCT_POINTS_FOLDER FLOOD_STUDY_1PCT_POINTS_FOLDER String 50 0 0 REASON_FOR_CHANGE REASON_FOR_CHANGE String 150 0 0 FE_FID FE_FID Integer 4 0 0 created_user created_user String 255 0 0 created_date created_date Date 8 0 0 last_edited_user last_edited_user String 255 0 0 last_edited_date last_edited_date Date 8 0 0 GlobalID GlobalID GlobalID 38 0 0 VALIDATIONSTATUS Validation status SmallInteger 2 0 0 PARENT_CLASSIFICATION_ID PARENT_CLASSIFICATION_ID SmallInteger 2 0 0 Shape_Length Shape_Length Double 8 0 0 Length of feature in internal units. Esri Positive real numbers that are automatically generated. Shape_Area Shape_Area Double 8 0 0 Area of feature in internal units squared. Esri Positive real numbers that are automatically generated. Flood Extent 5PCT Waterways 1 CALCULATION_METHOD FLCalculationMethod Domain Values for Calculation Method field Coded Value Default value Default value String REASON_FOR_CHANGE FLReasonForChange Domain Values for Reason for Change field Coded Value Default value Default value String VALIDATIONSTATUS 6 Validation Status The current record's validation status. Coded Value Default value Default value SmallInteger Flood Extent 5PCT UG Drains 2 CALCULATION_METHOD FLCalculationMethod Domain Values for Calculation Method field Coded Value Default value Default value String REASON_FOR_CHANGE FLReasonForChange Domain Values for Reason for Change field Coded Value Default value Default value String VALIDATIONSTATUS 6 Validation Status The current record's validation status. Coded Value Default value Default value SmallInteger Flood Extent 2PCT Waterways 3 CALCULATION_METHOD FLCalculationMethod Domain Values for Calculation Method field Coded Value Default value Default value String REASON_FOR_CHANGE FLReasonForChange Domain Values for Reason for Change field Coded Value Default value Default value String VALIDATIONSTATUS 6 Validation Status The current record's validation status. Coded Value Default value Default value SmallInteger Flood Extent 2PCT UG Drains 4 CALCULATION_METHOD FLCalculationMethod Domain Values for Calculation Method field Coded Value Default value Default value String REASON_FOR_CHANGE FLReasonForChange Domain Values for Reason for Change field Coded Value Default value Default value String VALIDATIONSTATUS 6 Validation Status The current record's validation status. Coded Value Default value Default value SmallInteger Flood Extent 20PCT Waterways 5 CALCULATION_METHOD FLCalculationMethod Domain Values for Calculation Method field Coded Value Default value Default value String REASON_FOR_CHANGE FLReasonForChange Domain Values for Reason for Change field Coded Value Default value Default value String VALIDATIONSTATUS 6 Validation Status The current record's validation status. Coded Value Default value Default value SmallInteger Flood Extent 20PCT UG Drains 6 CALCULATION_METHOD FLCalculationMethod Domain Values for Calculation Method field Coded Value Default value Default value String REASON_FOR_CHANGE FLReasonForChange Domain Values for Reason for Change field Coded Value Default value Default value String VALIDATIONSTATUS 6 Validation Status The current record's validation status. Coded Value Default value Default value SmallInteger Flood Extent 1PCT Waterways 7 CALCULATION_METHOD FLCalculationMethod Domain Values for Calculation Method field Coded Value Default value Default value String REASON_FOR_CHANGE FLReasonForChange Domain Values for Reason for Change field Coded Value Default value Default value String VALIDATIONSTATUS 6 Validation Status The current record's validation status. Coded Value Default value Default value SmallInteger Flood Extent 1PCT UG Drains 8 CALCULATION_METHOD FLCalculationMethod Domain Values for Calculation Method field Coded Value Default value Default value String REASON_FOR_CHANGE FLReasonForChange Domain Values for Reason for Change field Coded Value Default value Default value String VALIDATIONSTATUS 6 Validation Status The current record's validation status. Coded Value Default value Default value SmallInteger Flood Extent 1PCT Coastal  9 CALCULATION_METHOD FLCalculationMethod Domain Values for Calculation Method field Coded Value Default value Default value String REASON_FOR_CHANGE FLReasonForChange Domain Values for Reason for Change field Coded Value Default value Default value String VALIDATIONSTATUS 6 Validation Status The current record's validation status. Coded Value Default value Default value SmallInteger Flood Extent 10PCT Waterways 10 CALCULATION_METHOD FLCalculationMethod Domain Values for Calculation Method field Coded Value Default value Default value String REASON_FOR_CHANGE FLReasonForChange Domain Values for Reason for Change field Coded Value Default value Default value String VALIDATIONSTATUS 6 Validation Status The current record's validation status. Coded Value Default value Default value SmallInteger Flood Extent 10PCT UG Drains 11 CALCULATION_METHOD FLCalculationMethod Domain Values for Calculation Method field Coded Value Default value Default value String REASON_FOR_CHANGE FLReasonForChange Domain Values for Reason for Change field Coded Value Default value Default value String VALIDATIONSTATUS 6 Validation Status The current record's validation status. Coded Value Default value Default value SmallInteger CC Flood Extent 1PCT Waterways 2100 12 CALCULATION_METHOD FLCalculationMethod Domain Values for Calculation Method field Coded Value Default value Default value String REASON_FOR_CHANGE FLReasonForChange Domain Values for Reason for Change field Coded Value Default value Default value String VALIDATIONSTATUS 6 Validation Status The current record's validation status. Coded Value Default value Default value SmallInteger CC Flood Extent 1PCT Waterways 2040 13 CALCULATION_METHOD FLCalculationMethod Domain Values for Calculation Method field Coded Value Default value Default value String REASON_FOR_CHANGE FLReasonForChange Domain Values for Reason for Change field Coded Value Default value Default value String VALIDATIONSTATUS 6 Validation Status The current record's validation status. Coded Value Default value Default value SmallInteger CC Flood Extent 1PCT UG Drains 2100 14 CALCULATION_METHOD FLCalculationMethod Domain Values for Calculation Method field Coded Value Default value Default value String REASON_FOR_CHANGE FLReasonForChange Domain Values for Reason for Change field Coded Value Default value Default value String VALIDATIONSTATUS 6 Validation Status The current record's validation status. Coded Value Default value Default value SmallInteger MERGE_SRC MERGE_SRC String 255 0 0 CC Flood Extent 1PCT UG Drains 2040 15 CALCULATION_METHOD FLCalculationMethod Domain Values for Calculation Method field Coded Value Default value Default value String REASON_FOR_CHANGE FLReasonForChange Domain Values for Reason for Change field Coded Value Default value Default value String VALIDATIONSTATUS 6 Validation Status The current record's validation status. Coded Value Default value Default value SmallInteger CC Flood Extent 1PCT Coastal SLR 16 CALCULATION_METHOD FLCalculationMethod Domain Values for Calculation Method field Coded Value Default value Default value String REASON_FOR_CHANGE FLReasonForChange Domain Values for Reason for Change field Coded Value Default value Default value String VALIDATIONSTATUS 6 Validation Status The current record's validation status. Coded Value Default value Default value SmallInteger dataset EPSG 8.9.4(10.5.0) 0 Simple FALSE 0 TRUE FALSE 20230619