Alternate title

AfA029 Source Protection Zones [Merged]

Alternate title

Parthau Diogelu Tarddiad Dŵr Cyfunedig

Date (Publication)

2023-03-16

Citation identifier

https://naturalresources.wales / 116230

Point of contact

Organisation name	Individual name	Electronic mail address	Role
Natural Resources Wales (NRW)		enquiries@naturalresourceswales.gov.uk	Owner
Natural Resources Wales (NRW)		enquiries@naturalresourceswales.gov.uk	Originator

Maintenance and update frequency

As needed

Resource format

Name	Version
Geographic Information System

GEMET - INSPIRE themes, version 1.0

• Area management/restriction/regulation zones and reporting units

Use limitation

© CNC/NRW Data may be re-used under the terms of the Open Government Licence providing it is done so, acknowledging both the source and NRW's copyright. It is the recipient's responsibility to ensure the data is fit for the intended purpose.

Access constraints

Other restrictions

Other constraints

There are no access restrictions on this data. NRW may release, publish or disseminate it freely.

Language

English

Topic category

• Inland waters

Geographic identifier

Wales (WLS)

ISO3166 Countries 2023-05-27 publication

Begin date

2008-01-01

End date

2023-03-16

Reference system identifier

OGP / urn:ogc:def:crs:EPSG::OSGB36

Distribution format

Distributor contact

Organisation name	Individual name	Electronic mail address	Role
Natural Resources Wales (NRW)		enquiries@naturalresourceswales.gov.uk	Distributor

OnLine resource

Protocol	Linkage	Name
	https://datamap.gov.wales/layers/inspire-nrw:NRW_Source_Protection_Zones	Download Data and Web services
	https://datamap.gov.wales/capabilities/layer/400/?access_token=i61nd1X0RwdwAgQrGW0sqAsWxBMiwx&ows_service=wms	Web Mapping Services

Hierarchy level

Dataset

Statement

The following subdivisions are defined within SPZs: - Zone 1: (Inner Protection Zone) - This zone is defined by a travel time of 50-days or less from any point within the zone at, or below, the water table. Additionally, the zone has as a minimum a 50-metre radius. It is based principally on biological decay criteria and is designed to protect against the transmission of toxic chemicals and water-borne disease. - Zone 2: (Outer Protection Zone) - This zone is defined by the 400-day travel time from a point below the water table. Additionally this zone has a minimum radius of 250 or 500 metres, depending on the size of the abstraction. The travel time is derived from consideration of the minimum time required to provide delay, dilution and attenuation of sl

owly degrading pollutants. - Zone 3: (Total catchment) - This zone is defined as the total area needed to support the abstraction or discharge from the protected groundwater source. - A further Zone 4, or 'Zone of Special Interest' was previously defined for some groundwater sources. These zones highlighted areas (mainly on non-aquifers) where known local conditions meant that potentially polluting activities could impact on a groundwater source even though the area is outside the normal catchment of that source. In future this zone will be incorporated into one of the other zones (1, 2 or 3), whichever is appropriate in the particular case. Large potable groundwater abstractions site are georeferenced as Source Protection Locations. A groundwater flow model for relevant aq

uifer is run and classified into zones defined by travel time. Individual Source Protection Zones are merged and dissolved by Zone number stripping out SPZ name. This is for National Security reasons.

Metadata

File identifier

4f4c4942-4343-5764-6473-313136323330 XML

Metadata language

English

Hierarchy level

Dataset

Date stamp

2023-05-26

Metadata standard name

Gemini

Metadata standard version

2.2

Metadata author

Organisation name	Individual name	Electronic mail address	Role
Natural Resources Wales (NRW)		enquiries@naturalresourceswales.gov.uk	Point of contact