Parent Layer: Coastal Flood Hazard Zones

Name: Coastal Flood Hazard Zone 3 (100 years + Rapid Sea Level Rise Scenario)

Display Field: Catchment

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Description: A TUFLOW hydraulic model was developed to simulate flood response across the Raupo Drainage Scheme in Kaipara District. This includes the town of Ruawai and surrounds, which are protected from the Wairoa River with a series of stopbanks and floodgates. These structures were included in the model, which was simulated for design events including the 1% (100 year), 2% (50 year), 10% (10 year) and 20% AEP (5 year), as well as the 1% AEP with Climate Change (100 year + CC) using a rainfall-on-grid approach.Additional Coastal Hazard scenarios (listed below) were simulated without rainfall, to present the implications of sea level rise on the district.CFHZ0 - 1% AEP SurgeCFHZ1 - 2% AEP Surge + 0.6 m SLRCFHZ2 - 1% AEP Surge + 1.2 m SLR CFHZ3 - 1% AEP Surge + 1.66 m SLRThe model outputs are able to identify the potential flooding extents, depths and velocities and can be used to assess the impact on the built environment, infrastructure, and community as well as, subsequently, aid in the development of effective mitigation measures.The model output for this layer is the flood hazard polygon for Coastal Flood Hazard Zone 3 (100 years + Rapid Sea Level Rise Scenario).Data provided by: Nicole Basher (Rivers and Natural Hazards) Data Published by: Divya Published on: Feb 2025

Service Item Id: 25ff899dca954790b5d0ca53a9ba6df5

Copyright Text: Water Technology, NRC, KDC

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Spatial Reference: 2193  (2193)  LatestVCSWkid(0)

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Fields:

• OBJECTID ( type: esriFieldTypeOID, alias: OBJECTID )
• Catchment ( type: esriFieldTypeString, alias: Catchment, length: 254 )
• ModelID ( type: esriFieldTypeString, alias: Model ID, length: 254 )
• PublishedYear ( type: esriFieldTypeInteger, alias: Year )
• InundationLevel ( type: esriFieldTypeString, alias: Inundation Level, length: 254 )
• SeaLevelRise ( type: esriFieldTypeString, alias: Sea Level Rise, length: 254 )
• ModelType ( type: esriFieldTypeString, alias: Model Type, length: 254 )
• Hazard ( type: esriFieldTypeString, alias: Hazard, length: 254 )
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