Metadata Name Description
Resource Name: EXTENT_100Y_ARI
Title: 1 in 100 year flood extent
Anzlic Id: ANZVI0803003630
Custodial Program: Water Resources Policy (WSG, DSE)
Custodian: Department of Environment, Land, Water & Planning
Abstract: Polygon data delineating modelled statistical flood extent with an Average Recurrence Interval (ARI) of 100 years. For historical/actual flood extents, refer to 'Historic_extent' layer.
Also known as the 1 in 100 year flood layer, it is used, amoung other things, in the creation of 'Land Subject to Innundation' areas as used in Planning Scheme Zones. The 1 in 100 year data is not restricted.
This data is part of a group of layers depicting a range of statistical ARI extents. Current layers include 5, 10, 20, 30, 50, 100, 200, 500, 1000 year intervals, each in a seperate dataset.
The layer called EXTENT_PMF represents areas of 'probable maximum flood' and is also part of this group.
The data is statistically derived using hydrological models, historic flood extents and heights.
Search Words: HAZARDS Flood, WATER Rivers, HUMAN ENVIRONMENT Planning, WATER Hydrology, WATER Surface
Nominal Input Scale: Generally 1:100,000 with data inside flood-proneTownship boundaries at 5 000 or better
Currency Date: 02 February 2018
Dataset Status: Completed
Progress: In Progress
Access Constraint: Creative Commons Attribution 4.0 International licence, Copyright and Attribution, Terms of Use - http://creativecommons.org/licenses/by/4.0/
General
Data Existence:
Metadata Name Description
Resource Name: EXTENT_100Y_ARI
Title: 1 in 100 year flood extent
Anzlic Id: ANZVI0803003630
Custodian: Department of Environment, Land, Water & Planning
Owner: Department of Environment, Land, Water & Planning
Jurisdiction: Victoria
Abstract: Polygon data delineating modelled statistical flood extent with an Average Recurrence Interval (ARI) of 100 years. For historical/actual flood extents, refer to 'Historic_extent' layer.
Also known as the 1 in 100 year flood layer, it is used, amoung other things, in the creation of 'Land Subject to Innundation' areas as used in Planning Scheme Zones. The 1 in 100 year data is not restricted.
This data is part of a group of layers depicting a range of statistical ARI extents. Current layers include 5, 10, 20, 30, 50, 100, 200, 500, 1000 year intervals, each in a seperate dataset.
The layer called EXTENT_PMF represents areas of 'probable maximum flood' and is also part of this group.
The data is statistically derived using hydrological models, historic flood extents and heights.
Search Words: HAZARDS Flood, WATER Rivers, HUMAN ENVIRONMENT Planning, WATER Hydrology, WATER Surface
Purpose: Mainly used for municipal planning and risk assessment. The EXTENT_100Y_ARI layer is deemed the most appropriate to use for determining areas at risk of flooding. This layer directly inputs into the Land Subject to Innundation overlay. (LSIO)
Geographic Extent Polygon:
Geographic Bounding Box:
-34
141
 
150
-39
Beginning Date: 01DEC1997
Ending Date: Current
Maintainence and Update Frequency: As required
Stored Data Format: ArcSDE in the CSDL Master version stored as file geodatabase on Gippsland GIS server GIGIS
Available Format(s) Types: ESRI and CAD export formats supported
Lineage: Primary
Positional Accuracy: Precision: 5m to 100m Initial data, flagged as 'modified = 20000101' varies in accuracy, and should be treated with caution, particularly at scales less than 1:25,000. Data with 'modified' values later than 20000101 are quite accurate and mostly sourced from flood studies. This data is suitable to use at township and parcel level. Reliability field provides clues to the accuracy, where a value of 1 is best and 3 is worst.
Atribute Accuracy: Attributes are verified and should be accurate. Overall reliability of the source material is indictaed in RELIABILITY field, where 'HIGH' is good and 'LOW' is poor quality source information.
Logical Consistency: Attributes are consistent with other related layers eg flood height contours
Data Source: Flood data dates back to mid 1800s and historically has been predominantly located in DNRE Floodplain Management. Some data is located in Water Authorities.
Completeness: Floodplain Management Unit mapping conventions on definitions of flood mapping height data will be followed .
Contact Organisation: Department of Environment, Land, Water & Planning
Contact Position: Dataset Data Manager
Address: PO Box 500
East Melbourne   Vic 3002
Australia
Telephone: 03 9637 9014
Facsimile: 03 9637 8600
Email Address: viktor.brenners@dse.vic.gov.au
Metadata Date: 2018-12-12 00:00:00.0
Additional Metadata: Recommend liason with Floodplain Management Unit to clarify use of this layer
Refer to mapping reports for each major data capture effort to be kept at DNRE Floodplain Management Unit.
Resource Name: EXTENT_100Y_ARI
Title: 1 in 100 year flood extent
Object Name: FLOOD.EXTENT_100Y_ARI
Column Name Column Name 10 Obligation Unique Data Type Reference Table Comments
AREA_SM AREA_SM O N NUMBER(38,8)
ARI ARI O N NUMBER(10)
GAUGEID GAUGEID O N VARCHAR2(20)
METHOD METHOD O N VARCHAR2(50)
MODIFIED MODIFIED O N NUMBER(10)
NOTE_CODE NOTE_CODE O N NUMBER(10)
PERIMETER PERIMETER O N NUMBER(38,8)
PLAN_NO PLAN_NO O N VARCHAR2(20)
RELIABILITY RELIABILTY O N VARCHAR2(50)
REPORT_CODE REPORTCODE O N NUMBER(10)
SCALE SCALE O N NUMBER(10)
SOURCE SOURCE O N VARCHAR2(50)
STUDYARI STUDYARI O N VARCHAR2(12)
STUDYID STUDYID O N VARCHAR2(12)
VERSION VERSION O N NUMBER(4)