Service Description: The purpose of this data is to identify the potential depth of water in areas susceptible to static coastal inundation under present-day and future extreme sea level conditions.
The mapping supports land use planning and hazard communication by showing areas below projected water levels using a bathtub model.
Service ItemId: c4e44fbd432c4682b50e9381ba6808af
Has Versioned Data: false
Max Record Count: 2000
Supported query Formats: JSON
Supports applyEdits with GlobalIds: False
Supports Shared Templates: True
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Description: This dataset presents the extent of static coastal inundation under possible future sea level rise scenarios and potential depth for a 1%AEP. The mapping identifies low-lying areas susceptible to flooding from elevated sea levels due to tides, storm surge, and projected sea level rise.
Covers nine coastal inundation cells:
- Waimea Inlet
- Tāhunanui
- Rocks Road
- Nelson CBD
- Nelson Haven
- Boulder Bank to Pepin Island
- Delaware Bay estuary
- Delaware open coast
- Oananga Bay
Mapping is based on elevation only and does not reflect flow paths or wave effects.
Finalised April 2026, based on 2025 LiDAR and 2020-2024 modelling.
Developed by Tonkin & Taylor Ltd for Nelson City Council and recorded as Nelson Coastal Inundation Mapping Update, Phase B (v1), December 2024 and Addendum, April 2026.
Derived from 2025 LiDAR data and NIWA (2018) storm tide levels. Mapping uses a bathtub approach and does not account for overland flow paths, engineered structures, or future shoreline changes.
Copyright Text: Developed by Tonkin & Taylor Ltd for Nelson City Council.
Spatial Reference: 2193 (2193)
Initial Extent:
XMin: 1619553.46721446
YMin: 5429387.89136341
XMax: 1620898.59597664
YMax: 5430384.54117166
Spatial Reference: 2193 (2193)
Full Extent:
XMin: 1615595.0814
YMin: 5424407
XMax: 1649926
YMax: 5455442
Spatial Reference: 2193 (2193)
Units: esriMeters
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