Name: Flood Hazard (Engineered)

Display Field: OBJECTID

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Description: The regulatory flood plain is the approved standard used in a particular watershed to define the limit of the flood plain for regulatory purposes. This standard is defined by the Ontario Ministry of Natural Resources and Forestry. Within TRCA’s jurisdiction, the regulatory flood plain is based on the more severe of the Regional Storm (Hurricane Hazel, 1954), or the 100 year storm; whichever is greater. For most of our jurisdiction, it is Hurricane Hazel. A hydrology model simulates the effect of this amount of rainfall as if it were over each watershed, taking into account the topography, soil type, land-use, and other characteristics to determine how much water would end up in our rivers and streams. A hydraulic model then looks at where this water would go, and what areas would be inundated. The inundated area for the regulatory storm is called the regulatory flood plain.

Copyright Text: TRCA

Min. Scale: 0

Max. Scale: 0

Default Visibility: true

Max Record Count: 2000

Supported query Formats: JSON, geoJSON, PBF

Use Standardized Queries: True

Extent:

XMin: -8908584.22144162
YMin: 5399972.03292172
XMax: -8791556.79174526
YMax: 5469915.90700913
Spatial Reference: 102100 (3857)

Drawing Info:

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Has Attachments: false

Has Geometry Properties: true

HTML Popup Type: esriServerHTMLPopupTypeAsHTMLText

Object ID Field: OBJECTID

Unique ID Field:

Name : OBJECTID

IsSystemMaintained : True

Global ID Field:

Type ID Field:

Fields:

• OBJECTID (type: esriFieldTypeOID, alias: OBJECTID, SQL Type: sqlTypeOther, length: 0, nullable: false, editable: false)
• FloodPlainSource (type: esriFieldTypeString, alias: FloodPlainSource, SQL Type: sqlTypeOther, length: 20, nullable: true, editable: true)
• Watershed (type: esriFieldTypeString, alias: Watershed, SQL Type: sqlTypeOther, length: 20, nullable: true, editable: true)
• Shape__Area (type: esriFieldTypeDouble, alias: Shape__Area, SQL Type: sqlTypeDouble, nullable: true, editable: false)
• Shape__Length (type: esriFieldTypeDouble, alias: Shape__Length, SQL Type: sqlTypeDouble, nullable: true, editable: false)

Templates:

Name: Flood_Hazard_Engineered_June2019_dissolve
Description:
Drawing Tool: esriFeatureEditToolPolygon
Prototype:

Attributes:

Is Data Versioned: false

Has Contingent Values: false

Supports Rollback On Failure Parameter: true

Last Edit Date: 3/27/2024 3:18:25 AM

Schema Last Edit Date: 3/27/2024 3:18:25 AM

Data Last Edit Date: 3/27/2024 3:18:25 AM

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