Name: 1% AEP Flood Model Results (above 100mm)

Display Field: Comments

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Description: Much of the settled Hawke’s Bay region is low lying and built on river flood plains. This brings the risk of flooding, which is our most common natural hazard - a severe storm or flood happens every 10 years on average. Major storms affect wide areas and can be accompanied by strong winds, heavy rain or snowfall, thunder, lightning, and rough seas. They can cause damage to property and infrastructure, affect crops and livestock, disrupt essential services and cause coastal inundation.Rivers normally flood every winter when a storm brings more rainwater than can soak into the soil. When floods threaten communities the flood become a hazard. In Hawke's Bay stopbanks have been built alongside many of the rivers to hold in the extra flood water. However, in a severe storm, rivers could breach stopbanks and the flood waters may inundate farms, homes, shops, schools and damage roads and other infrastructure.There have been significant flood protection systems completed on the Heretaunga Plains and the Ruataniwha Plains. Flood protection works in Hawke’s Bay are generally designed to contain a 1% annual exceedance probability (AEP) flood). These works have significantly reduced the effect of small to medium sized floods, but a large flood could overwhelm the works and have a devastating effect. Such a flood, which exceeds the design capacity of the flood protection system, is called a Super Design Flood. Flooding from localised downpours in urban areas can also overwhelm drainage systems, so events below the AEP can still be costly.With climate change, rainfall patterns in the Hawke’s Bay are expected to change over the next century; winters are predicted to become drier, but overall flood risk is expected to increase as single events may be more intense.

Service Item Id: a6f9959510494155b4d3cb597cdeda5b

Copyright Text: Hawke's Bay Regional Council

Default Visibility: false

MaxRecordCount: 2000

Supported Query Formats: JSON, geoJSON, PBF

Min Scale: 0.0

Max Scale: 0.0

Supports Advanced Queries: true

Supports Statistics: true

Has Labels: false

Can Modify Layer: true

Can Scale Symbols: false

Use Standardized Queries: true

Supports Datum Transformation: true

Extent:

XMin: 1928921.8201000001
YMin: 5613832.8233
XMax: 1937583.6917000003
YMax: 5631860.5463
Spatial Reference: 2193  (2193)  LatestVCSWkid(0)

Drawing Info:

Renderer:
Class Breaks Renderer:
Field: max_water_depth
Min. Value: 0.1
ClassBreakInfos:
• Class Maximum Value: 0.299
  Label: 100-299mm
  Description: N/A
  Symbol:
  Style: esriSFSSolid
  Color: [190, 210, 255, 255]
  Outline:
  Style: esriSLSNull
  Color: [110, 110, 110, 255]
  Width: 0
• Class Maximum Value: 0.499
  Label: 300-499mm
  Description: N/A
  Symbol:
  Style: esriSFSSolid
  Color: [0, 112, 255, 255]
  Outline:
  Style: esriSLSNull
  Color: [110, 110, 110, 255]
  Width: 0
• Class Maximum Value: 5
  Label: 500mm+
  Description: N/A
  Symbol:
  Style: esriSFSSolid
  Color: [0, 77, 168, 255]
  Outline:
  Style: esriSLSNull
  Color: [110, 110, 110, 255]
  Width: 0
Transparency: 0
Labeling Info:

Advanced Query Capabilities:

Supports Statistics: true
Supports OrderBy: true
Supports Distinct: true
Supports Pagination: true
Supports TrueCurve: true
Supports Returning Query Extent: true
Supports Query With Distance: true
Supports Sql Expression: true
Supports Query With ResultType: false
Supports Returning Geometry Centroid: false
Supports Binning LOD: false
Supports Query With LOD Spatial Reference: false

HasZ: false

HasM: false

Has Attachments: false

HTML Popup Type: esriServerHTMLPopupTypeAsHTMLText

Type ID Field: null

Fields:

• OBJECTID ( type: esriFieldTypeOID, alias: OBJECTID )
• Shape ( type: esriFieldTypeGeometry, alias: Shape )
• Shape_Length ( type: esriFieldTypeDouble, alias: Shape_Length )
• Shape_Area ( type: esriFieldTypeDouble, alias: Shape_Area )
• max_water_depth ( type: esriFieldTypeDouble, alias: max_water_depth )
• Comments ( type: esriFieldTypeString, alias: Comments, length: 254 )
• Accuracy ( type: esriFieldTypeDouble, alias: Accuracy )
• Location ( type: esriFieldTypeString, alias: Location, length: 50 )
• Class ( type: esriFieldTypeString, alias: Class, length: 50 )
• Modelled ( type: esriFieldTypeString, alias: Modelled, length: 1 )
• FloodLevel ( type: esriFieldTypeDouble, alias: FloodLevel )
• ReturnPeriod ( type: esriFieldTypeInteger, alias: ReturnPeriod )
• DateModified ( type: esriFieldTypeDate, alias: DateModified, length: 8 )

Supported Operations:   Query   Query Attachments   Query Analytic   Generate Renderer   Return Updates

  Iteminfo   Thumbnail   Metadata