Floodplain Mapping Index for Western Australian Rivers

FPM Map Index (DWER-023) from the Department of Water and Environmental Regulation comprises polygon map sheets describing the availability of hard copy floodplain mapping plans. The dataset covers 25 specific river systems and townsites across Western Australia, including the Swan, Avon, and Blackwood Rivers.

Use Cases

• Identify available hard copy floodplain mapping plans for specific townsites like Geraldton or Carnarvon using the polygon map sheets.
• Cross-reference the map index with other FPM dataset layers, such as FPM Flood Level Contours or FPM Extent of Flooding, to locate detailed flood data.
• Analyze spatial coverage of floodplain development advice across the 25 listed areas, including the Peel Inlet and Murray River systems.

Strengths

• Produced by the authoritative Department of Water and Environmental Regulation for regulatory floodplain development advice.
• Covers 25 distinct river systems and townsites across Western Australia, providing broad geographic coverage.
• Integrates with 12 other defined FPM dataset layers for comprehensive floodplain analysis when loaded in sequence.

Limitations

• Dataset scope is limited to major river flooding; it does not address stormwater drainage or environmental considerations.
• Specific quantitative details like row count, column count, and file sizes are unknown, limiting pre-analysis assessment.
• Data is focused on availability of hard copy plans rather than containing the raw flood elevation or extent data itself.

Provenance

Source

Department of Water and Environmental Regulation, Geospatial and Data Services Manager.

Collection Method

Floodplain mapping produced by the department for development advice; dataset comprises index polygons of available hard copy plans.

Time Range

null

Freshness

Last updated March 2026.

Geography

Western Australia, covering 25 specified river systems and townsites from Toodyay to Busselton.