Name: Liquefaction Hazard

Display Field: LiqExpl

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Description: The intent of this dataset is to depict liquefaction susceptibility from a M9 earthquake on the Cascade Subduction Zone within the Portland Water Bureau (PWB) service area and corridors along the conduits leading from the Bull Run watershed. Evaluating the potential for liquefaction and employing methods to mitigate its impacts were recognized as key factors for increasing earthquake resilience in the Oregon Resilience Plan (OSSPAC, 2013), as well as previous earthquake risk studies. Delineation of liquefaction-susceptible deposits in the PWB service area and estimating the magnitude of potential ground deformation is essential for the evaluation of potential damage from future large earthquakes in the Portland area. Mapping of liquefaction hazard allows for planning and mitigation prior to the next large earthquake and can be used for prioritizing emergency response following the earthquake. This dataset represents liquefaction susceptibility for the City of Portland Water Bureau service area and the conduit corridors leading from the Bull Run Watershed.Geologic units susceptible to liquefaction have been attributed with a ranking, consisting of four ranked suceptibility classes ranging from Low to Very High. (A model was developed to account for five classes ranging from Very Low to Very High, however, no features fell within the Very Low classification.) Those with null "LiqExpl" values have been excluded from the analysis. Water bodies were removed. Complete methodology may be found in the draft report deliverable, Liquefaction and Lateral Spread Hazard, (InfraTerra, 2015), submitted to the Portland Water Bureau.

Copyright Text: InfraTerra Inc. and Cascade GIS & Consulting LLC.

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: -1.36886424754E7
YMin: 5664393.854999997
XMax: -1.3597327082899999E7
YMax: 5740371.916000001
Spatial Reference: 102100  (3857)  LatestVCSWkid(0)

Drawing Info:

Renderer:
Unique Value Renderer:
Field 1: LiqExpl
Field 2: N/A
Field 3: N/A
Field Delimiter: ,
Default Symbol:
N/A
Default Label: N/A
UniqueValueInfos:
• Value: Very High
  Label: Very High
  Description: N/A
  Symbol:
  Style: esriSFSSolid
  Color: [202, 122, 245, 127]
  Outline:
  N/A
• Value: High
  Label: High
  Description: N/A
  Symbol:
  Style: esriSFSSolid
  Color: [245, 122, 122, 127]
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• Value: Moderate
  Label: Moderate
  Description: N/A
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  Style: esriSFSSolid
  Color: [255, 170, 0, 127]
  Outline:
  N/A
• Value: Low
  Label: Low
  Description: N/A
  Symbol:
  Style: esriSFSSolid
  Color: [255, 255, 115, 127]
  Outline:
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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 )
• LiqExpl ( type: esriFieldTypeString, alias: LiqExpl, length: 254 )
• GW_DEPTH ( type: esriFieldTypeString, alias: GW_DEPTH, length: 50 )
• MAP_UNIT_L ( type: esriFieldTypeString, alias: MAP_UNIT_L, length: 12 )
• MAP_UNIT_N ( type: esriFieldTypeString, alias: MAP_UNIT_N, length: 100 )
• Concat ( type: esriFieldTypeString, alias: Concat, length: 30 )
• LiqSuscept ( type: esriFieldTypeString, alias: LiqSuscept, length: 255 )
• Shape_Length ( type: esriFieldTypeDouble, alias: Shape_Length )
• Shape_Area ( type: esriFieldTypeDouble, alias: Shape_Area )

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

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