Layer: Vulnerability Index (ID: 59)

Parent Layer: Groundwater Vulnerability

Name: Vulnerability Index

Display Field: HydrogeologicSetting

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Description: <DIV STYLE="text-align:Left;"><DIV><DIV>GV maps describe each area aquifer’s relative vulnerability to groundwater contamination, with lower Index values indicating less vulnerable conditions and higher values indicating higher vulnerability. They are calculated by weighing and summing the 7 DRASTIC parameters (D – Depth to Water, R – Net Recharge, A - Aquifer Media, S – Soil Media, T – Topography, I – Impact of Vadose Zone Media, C – Hydraulic Conductivity) according to the following formula, where W is the parameter’s weight and R its rating: GV Index= WD•RD+ WR•RR+ WA•RA+ WS•RS+ WT•RT+ WI•RI+ WC•RC.</DIV></DIV></DIV>

Service Item Id: 5f6160c3a1b34ca9804db4130bc051a0

Copyright Text: C. B. Nelson, T. R. Valachovics, M. P. Angle, K. M. Hardin, T. A. Nash, P. N. Spahr, J. M. Raab, C. J. Coe

Default Visibility: false

MaxRecordCount: 1000

Supported Query Formats: JSON, geoJSON, PBF

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Type ID Field: null

Fields:

OBJECTID ( type: esriFieldTypeOID, alias: OBJECTID )
HydrogeologicSetting ( type: esriFieldTypeString, alias: Hydrogeologic Setting, length: 27 , Coded Values: [6Da: 6Da - Regolith over Bedded Sedimentary Rock (Unglaciated)] , [6Dc: 6Dc - Thick Loess over Bedded Sedimentary Rock (Unglaciated)] , [6E: 6E - Limestone (Unglaciated)] , ...37 more... )
DepthToWater ( type: esriFieldTypeString, alias: Depth to Water (ft), length: 7 , Coded Values: [0-5: 0-5] , [5-15: 5-15] , [15-30: 15-30] , ...6 more... )
Recharge ( type: esriFieldTypeString, alias: Net Recharge (in/yr), length: 4 , Coded Values: [0-2: 0-2] , [2-4: 2-4] , [4-7: 4-7] , ...3 more... )
AquiferMedia ( type: esriFieldTypeString, alias: Aquifer Media, length: 35 , Coded Values: [Interbedded Sandstone and Shale: Interbedded Sandstone and Shale] , [Interbedded Sedimentary Rocks: Interbedded Sedimentary Rocks] , [Limestone: Limestone] , ...5 more... )
AQRating ( type: esriFieldTypeSmallInteger, alias: Aquifer Rating , Coded Values: [0: 0] , [1: 1] , [2: 2] , ...8 more... )
SoilMedia ( type: esriFieldTypeString, alias: Soil Media, length: 40 , Coded Values: [Thin or Absent: Thin or Absent] , [Gravel: Gravel] , [Marl: Marl] , ...9 more... )
Topography ( type: esriFieldTypeString, alias: Topography (% slope), length: 6 , Coded Values: [0-2: 0-2] , [2-6: 2-6] , [6-12: 6-12] , ...3 more... )
VadoseMedia ( type: esriFieldTypeString, alias: Vadose Zone Media, length: 35 , Coded Values: [Alluvium: Alluvium] , [Interbedded Sandstone and Shale: Interbedded Sandstone and Shale] , [Interbedded Sedimentary Rocks: Interbedded Sedimentary Rocks] , ...9 more... )
VADRating ( type: esriFieldTypeSmallInteger, alias: Vadose Rating , Coded Values: [0: 0] , [1: 1] , [2: 2] , ...8 more... )
HydraulicConductivity ( type: esriFieldTypeString, alias: Hydraulic Conductivity (ft/d), length: 10 , Coded Values: [<10: <10] , [10-50: 10-50] , [50-100: 50-100] , ...4 more... )
DTWRating ( type: esriFieldTypeSmallInteger, alias: Depth to Water Rating , Coded Values: [0: 0] , [1: 1] , [2: 2] , ...8 more... )
RECRating ( type: esriFieldTypeSmallInteger, alias: Net Recharge Rating , Coded Values: [0: 0] , [1: 1] , [2: 2] , ...8 more... )
SORating ( type: esriFieldTypeSmallInteger, alias: Soil Media Rating , Coded Values: [0: 0] , [1: 1] , [2: 2] , ...8 more... )
TOPRating ( type: esriFieldTypeSmallInteger, alias: Topography Rating , Coded Values: [0: 0] , [1: 1] , [2: 2] , ...8 more... )
HydraulicConductivityGPD ( type: esriFieldTypeString, alias: Hydraulic Conductivity (gpd/ft2), length: 10 )
HYCORating ( type: esriFieldTypeSmallInteger, alias: Hydraulic Conductivity Rating , Coded Values: [0: 0] , [1: 1] , [2: 2] , ...8 more... )
GVIndex ( type: esriFieldTypeSmallInteger, alias: Groundwater Vulnerability Index )
PestIndex ( type: esriFieldTypeSmallInteger, alias: Pesticide Vulnerability Index )
Shape ( type: esriFieldTypeGeometry, alias: Shape )
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