Norton, L.; Dunbar, M.; Greene, S.; Scholefield, P.A.

Headwater stream quality for Britain

Data consist of modelled estimates of observed/expected Biological Monitoring Working Party (an index for measuring the biological quality of rivers using selected families of macroinvertebrates as biological indicators) scores for freshwater streams across Great Britain (GB). The BMWP scores (1-10) are based on the principle that macroinvertebrates differ in their perceived sensitivity or tolerance to organic pollution (i.e. nutrient enrichment). Values greater than 1 indicate high water quality. Data pooled across two survey years (1998 and 2007) was used to model the relationships between headwater stream quality and catchment/stream characteristics for headwater streams across GB based on known relationships for headwater streams in Countryside Survey squares. Modelled estimates of stream water quality were based on a Boosted Regression Tree modelling approach .

Publication date: 2016-02-04

Get the data

Download the data

Supporting documentation

Format of the dataset : Esri shapefile

Access and use conditions

This resource is made available under the terms of the Open Government Licence

You must cite: Norton, L.; Dunbar, M.; Greene, S.; Scholefield, P.A. (2016). Headwater stream quality for Britain. NERC Environmental Information Data Centre. https://doi.org/10.5285/85e7beb6-e031-4397-a090-841b8c907d1b

 

© Natural England

The following organisations must be acknowledged by users of this dataset: NERC, Defra, the National Assembly for Wales, the Scottish Government, Natural England, Countryside Council for Wales, Scottish Natural Heritage.

Where/When

Study area
Temporal extent
1998-05-01    to    2007-10-31

Provenance & quality

This national model was developed following initial work under the Countryside Survey Integrated Assessment which investigated the relationships between water quality and the characteristics of the 1km squares in which they were located.

Authors

Norton, L.
Centre for Ecology & Hydrology
Dunbar, M.
Centre for Ecology & Hydrology
Greene, S.
Centre for Ecology & Hydrology
Scholefield, P.A.
Centre for Ecology & Hydrology

Other contacts

Custodian
Environmental Information Data Centre
Publisher
NERC Environmental Information Data Centre

Spatial

Spatial representation type
Raster
Spatial reference system
OSGB 1936 / British National Grid

Tags

Topic categories
Environment
INSPIRE Theme
Hydrography
Keywords
Countryside Survey,  GB,  headwater streams,  modelled,  Modelling Natural capital water quality