Name: va_aus_2020_estuarine

Display Field: WATER_NAME

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Description: Display and define all surface waters identified within the 2020 305(b)/303(d) Water Quality Assessment Integrated Report. The Assessment Unit (AU) dataset was created from United States Geological Survey (USGS) National Hydrography Dataset (NHD) high-resolution 1:24,000 data extracted in September 2012. The NHD product was used by DEQ regional assessment staff to assign previously established assessment unit IDs based on predetermined up- and downstream extents and applicable Water Quality Standards. Some erroneous waters were removed and a few waters were corrected for spatial accuracy using Virginia Base Mapping Program aerial photography from Virginia Geographic Information Network (VGIN), and recent NHD data where available.There are 3 feature classes within the geodatabase:va_aus_estuarine – estuarine waters within the commonwealth, including the Chesapeake Bay and tidal tributaries to the Bayva_aus_reservoir – lakes and reservoirs with Water Quality Standards or those monitored within the commonwealth; see appendix 7 of the IR for a complete listva_aus_riverine – free flowing surface waters within the commonwealth This data constitutes the United States Environmental Protection Agency (EPA) approved version of the assessment unit hydrology for Virginia. Attributes assigned to each water segment are based on details associated with the ID305B (assessment unit ID) from the statewide water quality assessment database (ADB) (ADB is deprecated as of the 2020 cycle). Data validations are performed on the data prior to linking attributes to the GIS data, however errors may still occur.Additionally, a summary dataset of water quality monitoring stations (va_20ir_wqms) which includes DEQ and non-DEQ data is generated to supplement this AU data.Please direct any questions about attribute accuracy to the Data Contact.

Copyright Text: Virginia Department of Environmental Quality, Office of Ecology, Water Monitoring & Assessment Program

Default Visibility: false

MaxRecordCount: 2000

Supported Query Formats: JSON, geoJSON, PBF

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Max Scale: 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: -8624071.8827
YMin: 4376618.056400001
XMax: -8369774.207899999
YMax: 4699494.263000003
Spatial Reference: 102100  (3857)

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Labeling Info:

Advanced Query Capabilities:

Supports Statistics: true
Supports OrderBy: true
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Supports Count Distinct: true
Supports Time Relation: true
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Supports Query Analytic: false
Supports Query With Current User: true

HasZ: false

HasM: false

Has Attachments: false

HTML Popup Type: esriServerHTMLPopupTypeAsHTMLText

Type ID Field: null

Fields:

• OBJECTID ( type: esriFieldTypeOID, alias: OBJECTID )
• ID305B ( type: esriFieldTypeString, alias: Assessment Unit ID, length: 50 )
• SQ_MILES ( type: esriFieldTypeDouble, alias: Sq_Miles )
• CYCLE ( type: esriFieldTypeString, alias: Cycle, length: 4 )
• WATER_NAME ( type: esriFieldTypeString, alias: Water Name, length: 100 )
• LOCATION ( type: esriFieldTypeString, alias: Location, length: 255 )
• CATEGORY ( type: esriFieldTypeString, alias: Category, length: 10 )
• AU_COMMENTS ( type: esriFieldTypeString, alias: AU Comments, length: 1073741822 )
• IMP_CAUSE ( type: esriFieldTypeString, alias: Impairment Cause(s), length: 1073741822 )
• SOURCE ( type: esriFieldTypeString, alias: Source(s), length: 1073741822 )
• AQUA_LIFE ( type: esriFieldTypeString, alias: Aquatic Life, length: 35 )
• DEEP_CHANN ( type: esriFieldTypeString, alias: Deep Channel, length: 35 )
• DEEP_WATER ( type: esriFieldTypeString, alias: Deep Water, length: 35 )
• FISH_CONSU ( type: esriFieldTypeString, alias: Fish Consumption, length: 35 )
• MIGRATORY ( type: esriFieldTypeString, alias: Migratory, length: 35 )
• OPEN_WATER ( type: esriFieldTypeString, alias: Open Water, length: 35 )
• PWS ( type: esriFieldTypeString, alias: Public Water Supply, length: 35 )
• RECREATION ( type: esriFieldTypeString, alias: Recreation, length: 35 )
• SHELLFISH ( type: esriFieldTypeString, alias: Shellfishing, length: 35 )
• SW_SAV ( type: esriFieldTypeString, alias: Shallow Water SAV, length: 35 )
• WILDLIFE ( type: esriFieldTypeString, alias: Wildlife, length: 35 )
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• SHAPE_Length ( type: esriFieldTypeDouble, alias: SHAPE_Length )
• SHAPE_Area ( type: esriFieldTypeDouble, alias: SHAPE_Area )
• definition ( type: esriFieldTypeString, alias: definition, length: 700 )
• CatOrigin ( type: esriFieldTypeString, alias: CategoryOrigin, length: 50 )
• Assessment ( type: esriFieldTypeString, alias: Assessment, length: 50 )
• AssessDef ( type: esriFieldTypeString, alias: AssessmentDefinition, length: 100 )

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

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