View In:   ArcGIS Online Map Viewer

Name: LO_CoastalProcesses_Shoreline_Hardening

Display Field: regunitid

Type: Feature Layer

Geometry Type: esriGeometryPolyline

Description: This data was derived as part of the Overall Assessment of the State of Nearshore Waters. Across the Great Lakes, much of the nearshore, waters edge or back of beach has been altered with engineered structures or artificial material. Hardened shorelines reduce coastal resiliency by altering sediment dynamics, accelerating erosion, increasing water turbidity & destroying local vegetation. Shoreline hardening is assessed by determining the percent of the total length of shoreline in a Regional Unit that is hardened.The shoreline of LakeOntario and the St. Lawrence Riverhas been delineated as either "natural" or "hardened" based on the following definitions:Natural Shoreline: no engineered or aritificial structures in the nearshore, at the waters edge, toe of bluff, backshore or back of the beach; rising and falling water levels result in natural changes in the shoreline position; wildlife usage and vegetation migration upslope and downslope can occur unimpeded; natural vegetation communities, consistent with local conditions, are generally present along the shore.Hardened Shoreline: the nearshore, waters edge, toe of bluff, backshore or back of beach has been altered with engineered structures or artificial material (e.g. offshore breakwaters, lakefill, groynes, seawalls, revetments, dumped concrete rubble, artificial channels, dikes, etc.); natural shoreline processes are altered, and native vegetation communities are generally absent.Shoreline exposure is also attributed:Lake:shoreline directly exposed to lake wave energySheltered: shorelines with embayments, tributaries or the inside of jettied structures where there is protection from wave energy and currentsConnecting Channel: shorelines in the Great Lakes connecting channelsBest available, most recent aerial imagery was used for the delineation, at a scale of approximately 1:2,000. Low Stress: <25% shoreline hardeningModerate Stress: 25-50% shoreline hardeningHigh Stress: >50% shoreline hardening

Service Item Id: 9328260f0d0d4f469088b9ff8ab82c32

Copyright Text: Environment and Climate Change Canada - Strategic Policy Branch - RDGO

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Supports ValidateSQL: true

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Extent:

XMin: 590018.5617000004
YMin: 4752644.215399999
XMax: 734068.2155999998
YMax: 4872427.2903
Spatial Reference: 26917  (26917)

Drawing Info:

Renderer:
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Labeling Info:

Advanced Query Capabilities:

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HasZ: false

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HTML Popup Type: esriServerHTMLPopupTypeAsHTMLText

Type ID Field:

Fields:

• objectid ( nullable: false, defaultValue: null, editable: false, length: 4, type: esriFieldTypeOID, modelName: OBJECTID, alias: OBJECTID )
• regunitid ( modelName: RegUnitID, nullable: true, editable: true, defaultValue: null, length: 5, alias: Regional Unit ID, type: esriFieldTypeString )
• unittype ( modelName: Class, nullable: true, editable: true, defaultValue: null, length: 50, alias: Regional Unit Type, type: esriFieldTypeString )
• shtype ( modelName: ShType, nullable: true, editable: true, defaultValue: null, length: 18, alias: Shoreline Type, type: esriFieldTypeString )
• shexp ( modelName: ShExp, nullable: true, editable: true, defaultValue: null, length: 20, alias: Shoreline Exposure, type: esriFieldTypeString )
• imagery ( modelName: Imagery, nullable: true, editable: true, defaultValue: null, length: 50, alias: Imagery Source, type: esriFieldTypeString )
• lengthkm ( modelName: LengthKM, nullable: true, editable: true, defaultValue: null, alias: Length (km), type: esriFieldTypeDouble )
• assessmentyear ( modelName: AssessmentYear, nullable: true, editable: true, defaultValue: null, length: 4, alias: Assessment Year, type: esriFieldTypeString )
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• Name: LO_CoastalProcesses_Shoreline_Hardening
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