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.
dataset
http://eidc.ceh.ac.uk/metadata/1957166d-7523-44f4-b279-aa5314163237/zip_export
name: Supporting information
description: Supporting information available to assist in re-use of this dataset.
function: information
https://catalogue.ceh.ac.uk/download?fileIdentifier=1957166d-7523-44f4-b279-aa5314163237
name: Download the data
description: Get a copy of this data
function: order
name: Map view service
description: This link returns a WMS GetCapabilities response in XML format
1425380978274
CEH:EIDC:
eng
urn:ogc:def:crs:EPSG
27700
inlandWaters
Hydrography
publication
2008-06-01
creation
2006-01-01
Great Britain
hydrometric areas
hydrometry
-8.648
1.768
60.861
49.864
2014-06-23
publication
2014-06-23
asNeeded
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
Shapefile
unknown
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
Centre for Ecology & Hydrology
pointOfContact
Centre for Ecology & Hydrology
owner
Centre for Ecology & Hydrology
author
Environmental Information Data Centre
custodian
NERC Environmental Information Data Centre
publisher
Environmental Information Data Centre
Lancaster Environment Centre, Library Avenue, Bailrigg
Lancaster
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UK
pointOfContact
2019-02-18T17:09:10