BGS Hosted Metadata
Integrated Hydrological Units of the United Kingdom: Hydrometric Areas with Coastline
This dataset is part of Integrated Hydrometric Units (IHU) of the UK. Hydrometric Areas are used to organise river flow measurement and hydrometric data collection in the UK. Hydrometric Areas are either integral river catchments having one or more outlets to the sea or tidal estuary, or they may include several contiguous river catchments having topographical similarity but separate tidal outlets. In mainland Britain they are numbered from 1 to 97 in clockwise order around the coast commencing in north east Scotland. The larger islands and groups of islands are numbered from 100-108. Ireland has a unified numbering system from 1 to 40 commencing with the River Foyle catchment and circulating clockwise; not all Irish Hydrometric Areas, however, have an outlet to the coast. Only those Hydrometric Areas covering Great Britain and Northern Ireland are included in this dataset. The boundaries between hydrometric areas correspond to catchment boundaries as digitally-derived from CEH Integrated Hydrological Digital Terrain Model (IHDTM) using a catchment definition program. It should be noticed that the Northern Ireland data are clipped to its political boundary so not every Hydrometric Area in this region is completely represented. The naming and numbering convention for the hydrometric areas in Great Britain was originally defined by the Inland Water Survey Committee (and first published in the Surface Water Year-Book of Great Britain 1936-37). For Northern Ireland the system was developed by a multi-agency working group in the 1970s (and first published in Surface Water: United Kingdom 1971-73. Note that full citations of those two publications are provided as additional information source. This dataset represent the same entities as the IHU Hydrometric Areas of the UK without Coastline, however, the outer boundaries of the units follow coastline published by the Ordnance Survey (Meridian 2), rather than the boundaries of the CEH Integrated Hydrological Digital Terrain Model. Full details about this dataset can be found at https://doi.org/10.5285/1957166d-7523-44f4-b279-aa5314163237
Simple
- Date (Publication)
- 2014-06-23
- Citation identifier
- CEH:EIDC: / 1425380978274
- Citation identifier
- https://catalogue.ceh.ac.uk/id/1957166d-7523-44f4-b279-aa5314163237
- Citation identifier
- doi: / 10.5285/1957166d-7523-44f4-b279-aa5314163237
- Other citation details
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National River Flow Archive (2014). Integrated Hydrological Units of the United Kingdom: Hydrometric Areas with Coastline. NERC Environmental Information Data Centre 10.5285/1957166d-7523-44f4-b279-aa5314163237
- Point of contact
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Organisation name Individual name Electronic mail address Role UK Centre for Ecology & Hydrology National River Flow Archive
Point of contact Centre for Ecology & Hydrology Owner Centre for Ecology & Hydrology National River Flow Archive
Author NERC EDS Environmental Information Data Centre Custodian NERC Environmental Information Data Centre Publisher
- Maintenance and update frequency
- As needed
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GEMET - INSPIRE themes, version 1.0
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Hydrography
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GEMET - Concepts, version 4.1.3
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GeoNames
- Keywords
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- Water Resources
- Hydrology
- Rees Section
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Great Britain
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hydrometric areas
- Access constraints
- Other restrictions
- Other constraints
- Registration is required to access this data
- Use constraints
- Other restrictions
- Other constraints
- Licence, copyright and IPR apply
- Use constraints
- Other restrictions
- Other constraints
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If you reuse this data, you should cite: National River Flow Archive (2014). Integrated Hydrological Units of the United Kingdom: Hydrometric Areas with Coastline. NERC Environmental Information Data Centre https://doi.org/10.5285/1957166d-7523-44f4-b279-aa5314163237
- Spatial representation type
- Vector
- Distance
- 50 urn:ogc:def:uom:EPSG::9001
- Language
- English
- Character set
- UTF8
- Topic category
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- Inland waters
- Begin date
- 2014-06-23
))
- Unique resource identifier
- OSGB 1936 / British National Grid
- Distribution format
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Name Version Shapefile
- Distributor contact
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Organisation name Individual name Electronic mail address Role NERC EDS Environmental Information Data Centre
Distributor
- OnLine resource
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Protocol Linkage Name https://data-package.ceh.ac.uk/data/1957166d-7523-44f4-b279-aa5314163237 Download the data
- OnLine resource
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Protocol Linkage Name https://data-package.ceh.ac.uk/sd/1957166d-7523-44f4-b279-aa5314163237.zip Supporting information
- OnLine resource
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Protocol Linkage Name https://catalogue.ceh.ac.uk/maps/cca47088-8cdd-4d7a-86b4-90f0a1766364?request=getCapabilities&service=WMS Map view service
- Hierarchy level
- Dataset
- Other
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dataset
Conformance result
- Title
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Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services
- Date (Publication)
- 2010-12-08
- Statement
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The hydrometric areas are based on watershed derived from the Integrated Hydrological Digital Terrain Model (IHDTM) elevation grid using an in-house catchment definition program. In Great Britain the coastline corresponds to the OS Meridian2 coastline. In Northern Ireland the boundary and coastline was derived from OS Panorama data in times when Ordnance Survey covered Northern Ireland. All boundaries have been processed to ensure they are topologically correct; there are no gaps or overlaps so every point in the country is allocated to one and only one Hydrometric Area
Metadata
- File identifier
- 1957166d-7523-44f4-b279-aa5314163237 XML
- Metadata language
- English
- Character set
- 8859 Part 1
- Hierarchy level
- Dataset
- Hierarchy level name
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dataset
- Date stamp
- 2026-01-09T12:18:24
- Metadata standard name
- UK GEMINI
- Metadata standard version
-
2.3
- Metadata author
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Organisation name Individual name Electronic mail address Role NERC EDS Environmental Information Data Centre Point of contact
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