dataset · United Kingdom
Government / regulator
Integrated Hydrological Units of the United Kingdom: Hydrometric Areas without Coastline
This dataset is part of Integrated Hydrological Units (IHU) of the UK, a set of geographical reference units for hydrological purposes including river flow measurement and hydrometric data collection. 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. Hydrometric Areas are the coarsest units of the IHU in terms of spatial
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What's in it
- Data offered docs-verified
- Hydrometric Area boundaries (IHU, without coastline)
- Coverage docs-verified
- Great Britain (England, Scotland, Wales); Northern Ireland not covered · from 2014-08-20 (open-ended)
- Resolution docs-verified
- Coarsest IHU level (hydrometric areas); no numeric scale stated
- Formats docs-verified
- File geodatabase (gdb)
- Access docs-verified
- Download under Non-Open government licence; licence terms and conditions apply. Whole dataset available as zip download; WMS view service also offered.
Useful for
- Use cases llm-inferred
- FRA context: assign catchment-scale hydrometric areas to a site or study area · Grouping gauged river flow records by hydrometric area for regional flow analysis · Reference boundary layer for catchment-scale water resources GIS mapping
- Audience llm-inferred
- flood consultants · hydrologists · water resources engineers · GIS analysts
Limitations
- Constraints llm-inferred
- Great Britain only; Northern Ireland not covered · Non-Open government licence; licence terms and conditions apply · Coarsest IHU level, so unsuitable for fine-scale analysis · Coastline follows the CEH IHDTM rather than Ordnance Survey data, so it differs from the with-coastline version · No update frequency stated
- Licence
- Non-Open government licence
- Authentication
- Unknown — review source docs
- GitHub stars
- Unknown
- Last commit
- Unknown
- Last successful page check
- 16/10/2026
- Page health
- healthy
- Package
- Not recorded
- Verification
- Not independently verified
Provenance & evidence
Listed in ukceh-eidc public catalogue API on 2026-10-16; relevance/value screened (haiku).
Metadata observed 14/10/2026 · research sweep: sweep-2026-10-16 (ukceh-eidc)