Name: Groundwater Salinity 2017

Display Field: Classes

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Description: Two areas of freshwater with low mineral content are found in Abu Dhabi Emirate:In the northeast, rainfall from the Hajjar Mountains recharges the aquifer and slowly flows towards the Arabian Gulf. The longer the water remains in the aquifer, the more time it has to dissolve minerals and interact with the rocks: In general, the water gets more saline as it flows towards the sea. Another area of low salinity is found north of Liwa, where recharge from rainfall is minimal and the resulting groundwater is older. Most of it entered the aquifer thousands of years ago, in a time with a more humid climate. Very slow groundwater flow, uniform sandy lithology, and a distinct vertical salinity gradient in the aquifer have kept the uppermost groundwater fresh for centuries. Along the coast in the west, as well as in the southeast, the groundwater table is very shallow. In these sabkha flats, the groundwater comes close to the surface and some of it evaporates. The dissolved minerals stay behind and lead to a further salinisation of the groundwater. Water in these regions can be as salty as 140,000 mg/L; that is more than three times as salty as the water of the Arabian Gulf.

Copyright Text: Created by Environment Agency - Abu Dhabi.

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MaxRecordCount: 1000

Supported Query Formats: JSON, geoJSON

Min Scale: 0

Max Scale: 0

Supports Advanced Queries: true

Supports Statistics: true

Has Labels: false

Can Modify Layer: true

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Use Standardized Queries: true

Supports Datum Transformation: true

Extent:

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YMin: 22.63162140000003
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Spatial Reference: 4326  (4326)

Drawing Info:

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  Label: < 500 Fresh (WHO Standard)
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• Value: 3
  Label: 1,000 - <1,500 Fresh
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• Value: 4
  Label: 1,500 - <4,000 Slightly Brackish
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• Value: 5
  Label: 4,000 - <7,000 Medium Brackish
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• Value: 6
  Label: 7,000 - <10,000 Strongly Brackish
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Labeling Info:

Advanced Query Capabilities:

Supports Statistics: true
Supports OrderBy: true
Supports Distinct: true
Supports Pagination: true
Supports TrueCurve: true
Supports Returning Query Extent: true
Supports Query With Distance: true
Supports Sql Expression: true
Supports Query With ResultType: false
Supports Returning Geometry Centroid: false

HasZ: false

HasM: false

Has Attachments: false

HTML Popup Type: esriServerHTMLPopupTypeAsHTMLText

Type ID Field: null

Fields:

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Supported Operations:   Query   Query Attachments   Generate Renderer   Return Updates

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