1 in 100 year flood extent

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.

Data and Resources

1 in 100 year flood extent

shp format

Use Order Resources to get access to spatial data in various formats and extents.

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Additional information

Field Value
Date Published 1997-12-01
Date Updated 2018-12-31
Agency Department of Environment, Land, Water & Planning
License Creative Commons Attribution 4.0 International
[Open Data]
Citation Copyright © The State of Victoria, Department of Environment, Land, Water & Planning 2019
Attribution Copyright © The State of Victoria, Department of Environment, Land, Water & Planning 2019
Data Temporal Coverage: 1997-12-01 to 2019-12-31
Geospatial Coverage 141,-39,150,-34
Geospatial Scale Generally 1:100,000 with data inside flood-proneTownship boundaries at 5 000 or better
Geospatial 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. 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.
Full Metadata URL http://services.land.vic.gov.au/catalogue/metadata?anzlicId=ANZVI0803003630&publicId=guest&extractionProviderId=1
Recent Downloads Count 16 (August 2014)