Name: IE_GSI_Groundwater_Recharge_40K_IE26_ITM

Display Field: AVRCHMMYR

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Description: Groundwater is the water that soaks into the ground from rain and is stored beneath the ground. An aquifer is a body of rock and/or sediment that holds groundwater. The process of rain filling up an aquifer is called ‘recharge’. The Groundwater Recharge map shows the amount of rainfall which reaches the stores of groundwater (the ‘aquifers’) across Ireland. The amount of recharge was calculated over the period 1981-2010 and then averaged to give a yearly amount.Geological information is interpreted by hydrogeologists to create the map includes soil drainage, subsoil type, subsoil permeability, subsoil thickness, groundwater vulnerability and aquifers. The amount of rain falling on the land minus how much of that rain is taken up by plants is also a factor that determines how much groundwater recharge there is at a particular location. This is known as the ‘effective rainfall’.Different combinations of the geological factors give 24 hydrogeological scenarios. There is a ‘recharge coefficient’ for each scenario, which is the percentage of the ‘effective rainfall’ that may become groundwater recharge. Using ArcGIS software, the data are merged to create areas on a map to show the recharge. Please read the lineage for more detail.This map is to the scale 1:40,000. This means it should be viewed at that scale. When printed at that scale 1cm on the map relates to a distance of 400m.It is a vector dataset. Vector data portray the world using points, lines, and polygons (areas). The recharge data is shown as polygons. Each polygon holds information on:Average Recharge (mm/yr) - average annual recharge to the groundwater aquifer across that polygonRecharge Coefficient (%) – the proportion of effective rainfall that becomes groundwaterEffective Rainfall (mm/yr) – the rainwater remaining after plants have taken up some of the rainfallRecharge Pre Cap (mm/yr) - effective rainfall x recharge coefficient, not limited by maximum recharge capacitiesRecharge Cap Apply – is there a maximum amount of recharge that the aquifer can accept? (Yes/ No)Recharge Maximum Capacity (mm/yr) – the maximum amount of recharge the aquifer can accept. Only applies to bedrock aquifers of category Ll, Pl, or Pu.Average Recharge Range (mm/yr) - Annual Recharge (mm) categorised into a range of values used to style the map. Hydrogeological Setting Code - determined by the combinations of different geological layersHydrogeological Setting Description – the description of the main geological layers that combine to let different amounts of rainfall through to become groundwaterVulnerability Category – the code for the groundwater vulnerabilityVulnerability Description – the groundwater vulnerability descriptionSoil Drainage – whether the soil is well drained or poorly drainedSubsoil Type (Quaternary Sediment Code) – the code for the subsoil typeSubsoil Description (Quaternary Sediment Description) – description of the subsoil typeSand/Gravel Subsoil – whether the subsoil is sand/gravel or notSubsoil Permeability Code - the code for the permeability of the subsoil Subsoil Permeability Description – description of the subsoil permeabilitySinking Stream – indicates the presence of a stream that sinks fully or partially into the ground. Derived from the Groundwater Vulnerability 40K mapping. Sand and Gravel Aquifer Category –Sand and Gravel Aquifer Category from Groundwater Resources (Aquifers) 40K mappingSand and Gravel Aquifer Description –Sand and Gravel Aquifer Description from Groundwater Resources (Aquifers) 40K mappingBedrock Aquifer Category –Bedrock Aquifer Category from Groundwater Resources (Aquifers) 100K mappingBedrock Aquifer Description –Bedrock Aquifer Description from Groundwater Resources (Aquifers) 100K mappingHydrostratigraphic Rock Unit Group Name– Rock Unit Groups that have hydrogeological significanceCounty – Irish County

Service Item Id: c01ddb1cfdc14e4795ba51b134dc898a

Copyright Text: Geological Survey Ireland

Default Visibility: true

MaxRecordCount: 2000

Supported Query Formats: JSON, geoJSON, PBF

Min Scale: 0

Max Scale: 40000

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: 417434.4498
YMin: 520073.684
XMax: 734495.1351
YMax: 959857.6687
Spatial Reference: 2157  (2157)

Drawing Info:

Renderer:
Unique Value Renderer:
Field 1: AVRCHRANGE
Field 2: N/A
Field 3: N/A
Field Delimiter: ,
Default Symbol:
N/A
Default Label: N/A
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Transparency: 33
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: true

HasM: false

Has Attachments: false

HTML Popup Type: esriServerHTMLPopupTypeAsHTMLText

Type ID Field: null

Fields:

• OBJECTID ( type: esriFieldTypeOID, alias: OBJECTID )
• AVRCHMMYR ( type: esriFieldTypeDouble, alias: Average Recharge (mm/yr) )
• RCHCOEFPCT ( type: esriFieldTypeSmallInteger, alias: Recharge Coefficient (%) )
• ERAIN_MMYR ( type: esriFieldTypeDouble, alias: Effective Rainfall (mm/yr) )
• RCHPCMMYR ( type: esriFieldTypeDouble, alias: Recharge Pre Cap (mm/yr) )
• RCHCPAPPLY ( type: esriFieldTypeString, alias: Recharge Cap Apply, length: 1 )
• RCHMAXCAP ( type: esriFieldTypeSmallInteger, alias: Recharge Maximum Capacity (mm/yr) )
• AVRCHRANGE ( type: esriFieldTypeString, alias: Average Recharge Range (mm/yr), length: 10 )
• HYDRO_CODE ( type: esriFieldTypeString, alias: Hydrogeological Setting Code, length: 10 )
• HYDRO_DESC ( type: esriFieldTypeString, alias: Hydrogeological Setting Description , length: 150 )
• VUL_CAT ( type: esriFieldTypeString, alias: Vulnerability Category, length: 1 )
• VUL_DESC ( type: esriFieldTypeString, alias: Vulnerability Description, length: 40 )
• SOIL_DRAIN ( type: esriFieldTypeString, alias: Soil Drainage, length: 10 )
• SUBSOILTYP ( type: esriFieldTypeString, alias: Subsoil Type (Quaternary Sediment Code), length: 10 )
• SUBSOILDSC ( type: esriFieldTypeString, alias: Subsoil Description (Quaternary Sediment Description), length: 100 )
• SSPERMCODE ( type: esriFieldTypeString, alias: Subsoil Permeability Code, length: 3 )
• SSPERMDESC ( type: esriFieldTypeString, alias: Subsoil Permeability Description, length: 30 )
• SINK_STREAM ( type: esriFieldTypeString, alias: Sinking Stream, length: 15 )
• SGAQUCAT ( type: esriFieldTypeString, alias: Sand and Gravel Aquifer Category, length: 10 )
• SGAQUDES ( type: esriFieldTypeString, alias: Sand and Gravel Aquifer Description, length: 50 )
• BEDAQUCAT ( type: esriFieldTypeString, alias: Bedrock Aquifer Category, length: 6 )
• BEDAQUDES ( type: esriFieldTypeString, alias: Bedrock Aquifer Description, length: 100 )
• HYRUGNAME ( type: esriFieldTypeString, alias: Hydrostratigraphic Rock Unit Group Name, length: 60 )
• COUNTY ( type: esriFieldTypeString, alias: County, length: 10 )

Supported Operations:   Query   Query Attachments   Generate Renderer   Return Updates

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