85e7beb6-e031-4397-a090-841b8c907d1b English ISO/IEC 8859-1 (also known as Latin 1) dataset dataset NERC EDS Environmental Information Data Centre Lancaster Environment Centre, Library Avenue, Bailrigg Lancaster LA1 4AP UK info@eidc.ac.uk https://eidc.ac.uk/ EIDC website The Environmental Information Data Centre (EIDC) is the UK's national data centre for terrestrial and freshwater sciences. information pointOfContact 2026-01-09T12:33:29 UK GEMINI 2.3 OSGB 1936 / British National Grid Headwater stream quality for Britain 2016-02-04 publication https://catalogue.ceh.ac.uk/id/85e7beb6-e031-4397-a090-841b8c907d1b 10.5285/85e7beb6-e031-4397-a090-841b8c907d1b doi: Norton, L., Dunbar, M., Greene, S., Scholefield, P.A. (2016). Headwater stream quality for Britain. NERC Environmental Information Data Centre 10.5285/85e7beb6-e031-4397-a090-841b8c907d1b 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 . Full details about this dataset can be found at https://doi.org/10.5285/85e7beb6-e031-4397-a090-841b8c907d1b Norton, L. UK Centre for Ecology & Hydrology enquiries@ceh.ac.uk pointOfContact Norton, L. Centre for Ecology & Hydrology enquiries@ceh.ac.uk author Dunbar, M. Centre for Ecology & Hydrology enquiries@ceh.ac.uk author Greene, S. Centre for Ecology & Hydrology enquiries@ceh.ac.uk author Scholefield, P.A. Centre for Ecology & Hydrology enquiries@ceh.ac.uk https://orcid.org/0000-0003-2974-6431 ORCID record ORCID is an open, non-profit, community-driven effort to create and maintain a registry of unique researcher identifiers and a transparent method of linking research activities and outputs to these identifiers. information author NERC Environmental Information Data Centre info@eidc.ac.uk publisher NERC EDS Environmental Information Data Centre info@eidc.ac.uk custodian Natural England enquiries@naturalengland.org.uk owner notPlanned Hydrography theme GEMET - INSPIRE themes, version 1.0 2008-06-01 publication Modelling GB modelled water quality Countryside Survey headwater streams otherRestrictions Registration is required to access this data otherRestrictions This resource is made available under the terms of the Open Government Licence otherRestrictions © Natural England otherRestrictions 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. otherRestrictions If you reuse this data, you should 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 grid 1000 English utf8 environment 1998-05-01 2007-10-31 -8.648 1.768 49.864 60.861 Esri shapefile NERC EDS Environmental Information Data Centre info@eidc.ac.uk distributor https://data-package.ceh.ac.uk/data/85e7beb6-e031-4397-a090-841b8c907d1b Download the data Download a copy of this data download https://data-package.ceh.ac.uk/sd/85e7beb6-e031-4397-a090-841b8c907d1b.zip Supporting information Supporting information available to assist in re-use of this dataset information dataset dataset 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 2010-12-08 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.