Name: Significant Groundwater Recharge Area (SGRA)

Display Field: SPP_ID

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Description: Tier 3 model did not encompass entire TRSPA, thus this is a combination of (mostly) the Tier 3 SGRA (where recharge rate is greater than 224 mm/yr) and the Tier 1 SGRA (where recharge rate is greater than 150mm/yr) for the area that fell outside of the Tier 3 model (Etobicoke Creek Watershed). SGRA excludes areas that are fully serviced by Lake Ontario.Background:Both the Tier 1 and the Tier 3 analyses used variations of the PRMS modelling code. The Tier 1 study used the PRMS model (Leavesely, et al., 1983) developed by Earthfx Inc. for the TRCA. The Tier 3 study used rates of groundwater recharge estimated with the integrated GSFLOW model (Markstrom et al., 2008) developed by Earthfx for the Tier 3 Water Budget Analysis.

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Spatial Reference: 26917  (26917)

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Fields:

• OBJECTID ( type: esriFieldTypeOID , alias: OBJECTID )
• SHAPE ( type: esriFieldTypeGeometry , alias: Shape )
• SPP_ID ( type: esriFieldTypeSmallInteger , alias: spp_id )
• SHAPE_Length ( type: esriFieldTypeDouble , alias: Shape_Length )
• SHAPE_Area ( type: esriFieldTypeDouble , alias: Shape_Area )
• VULNERABILITY_SCORE ( type: esriFieldTypeSmallInteger , alias: Vulnerability Score )
• EFFECTIVE_DATETIME ( type: esriFieldTypeDate , alias: Effective Datetime , length: 8 )

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