{"accessLimitation":{"value":"withdrawn","availability":"Withdrawn","description":"Access to the resource is limited to users who have been authorised by the data custodian or data owner in accordance with applicable policies, agreements, or licensing conditions","uri":"http://vocab.nerc.ac.uk/collection/N07/current/RAUT/"},"alternateTitles":["A tool for estimating river concentrations of chemicals originating from domestic sewage effluent"],"authors":[{"familyName":"Keller","givenName":"V.D.J.","organisationName":"Centre for Ecology & Hydrology","organisationIdentifier":"https://ror.org/00pggkr55","role":"author","email":"enquiries@ceh.ac.uk","nameIdentifier":"https://orcid.org/0000-0003-4489-5363","address":{"deliveryPoint":"Maclean Building, Benson Lane, Crowmarsh Gifford","city":"Wallingford","administrativeArea":"Oxfordshire ","postalCode":"OX10 8BB","country":"United Kingdom"},"fullName":"Keller, V.D.J."},{"familyName":"Williams","givenName":"R.","organisationName":"Centre for Ecology & Hydrology","organisationIdentifier":"https://ror.org/00pggkr55","role":"author","email":"enquiries@ceh.ac.uk","address":{"deliveryPoint":"Maclean Building, Benson Lane, Crowmarsh Gifford","city":"Wallingford","administrativeArea":"Oxfordshire ","postalCode":"OX10 8BB","country":"United Kingdom"},"fullName":"Williams, R."},{"familyName":"Lofthouse","givenName":"C.","organisationName":"Centre for Ecology & Hydrology","organisationIdentifier":"https://ror.org/00pggkr55","role":"author","email":"enquiries@ceh.ac.uk","address":{"deliveryPoint":"Maclean Building, Benson Lane, Crowmarsh Gifford","city":"Wallingford","administrativeArea":"Oxfordshire ","postalCode":"OX10 8BB","country":"United Kingdom"},"fullName":"Lofthouse, C."},{"familyName":"Johnson","givenName":"A.C.","organisationName":"Centre for Ecology & Hydrology","organisationIdentifier":"https://ror.org/00pggkr55","role":"author","email":"enquiries@ceh.ac.uk","nameIdentifier":"https://orcid.org/0000-0003-1570-3764","address":{"deliveryPoint":"Maclean Building, Benson Lane, Crowmarsh Gifford","city":"Wallingford","administrativeArea":"Oxfordshire ","postalCode":"OX10 8BB","country":"United Kingdom"},"fullName":"Johnson, A.C."}],"availability":"Withdrawn","boundingBoxes":[{"westBoundLongitude":-180,"eastBoundLongitude":180,"southBoundLatitude":-90,"northBoundLatitude":90,"bounds":"{\"type\": \"Feature\",      \"properties\": {},      \"geometry\": {        \"type\": \"Polygon\",        \"coordinates\": [[[-180, -90], [-180, 90], [180, 90], [180, -90], [-180, -90]]]      }}","coordinates":"[[[-180, -90], [-180, 90], [180, 90], [180, -90], [-180, -90]]]"}],"citation":{"authors":["Keller, V.D.J.","Williams, R.","Lofthouse, C.","Johnson, A.C."],"bibtex":"https://catalogue.ceh.ac.uk/documents/42044391-a041-4884-bed7-67f67490224f/citation?format=bib","day":11,"doi":"10.5285/42044391-a041-4884-bed7-67f67490224f","month":7,"publisher":"NERC Environmental Information Data Centre","resourceTypeGeneral":"dataset","ris":"https://catalogue.ceh.ac.uk/documents/42044391-a041-4884-bed7-67f67490224f/citation?format=ris","title":"Global dilution factors for domestic wastewater in rivers","url":"https://doi.org/10.5285/42044391-a041-4884-bed7-67f67490224f","year":2014},"contactPoints":[{"honorificPrefix":"Dr","familyName":"Keller","givenName":"Virginie","organisationName":"UK Centre for Ecology & Hydrology","organisationIdentifier":"https://ror.org/00pggkr55","role":"pointOfContact","email":"enquiries@ceh.ac.uk","address":{"deliveryPoint":"Maclean Building, Benson Lane, Crowmarsh Gifford","city":"Wallingford","administrativeArea":"Oxfordshire ","postalCode":"OX10 8BB","country":"United Kingdom"},"fullName":"Keller, V.","pointOfContact":"UK Centre for Ecology & Hydrology"}],"custodians":[{"organisationName":"NERC EDS Environmental Information Data Centre","organisationIdentifier":"https://ror.org/04xw4m193","role":"custodian","email":"info@eidc.ac.uk"}],"datasetLanguages":["eng"],"datasetReferenceDate":{"creationDate":"2013-12-31","publicationDate":"2014-07-11"},"description":"The dataset captures the temporal and spatial variability of dilution factors (DFs) around the world using geographically referenced data sets at 0.5 degree resolution and includes long term annual and monthly DFs grids. The dilution factor (DF) dataset is composed of 13 rasters: 1 annual and 12 monthly. DFs are a critical component in estimating concentrations of 'down-the-drain' chemicals which enter freshwaters following consumer use via the domestic waste water stream (e.g., pharmaceuticals, household cleaning products). The DF is defined as the ratio between flow and total domestic wastewater effluent generated within a catchment. The methodology was specifically developed to be applied across the world even within those countries where river flow data and/or wastewater effluent data is scarce. The present dataset has potential for a wide international community (including decision makers and pharmaceutical companies) to assess relative exposure to 'down-the-drain' chemicals released by human pollution in rivers and, thus, target areas of potentially high risk.","distributionFormats":[{"name":"ASCII grid","type":"text/plain","version":"unknown"}],"distributorContacts":[{"organisationName":"NERC EDS Environmental Information Data Centre","organisationIdentifier":"https://ror.org/04xw4m193","role":"distributor","email":"info@eidc.ac.uk"}],"id":"42044391-a041-4884-bed7-67f67490224f","incomingCitationCount":0,"infoLinks":[{"url":"https://data-package.ceh.ac.uk/sd/42044391-a041-4884-bed7-67f67490224f.zip","name":"Supporting Information","description":"Supporting information available to assist in re-use of this dataset.","function":"information","eidcDistribution":false,"type":"OTHER"}],"inspireThemes":[{"theme":"Hydrography","uri":"http://inspire.ec.europa.eu/theme/hy"}],"keywordsOther":[{"value":"Dilution factor"},{"value":"down-the-drain chemicals"},{"value":"environmental risk assessment"},{"value":"PEC"},{"value":"exposure","uri":"http://www.eionet.europa.eu/gemet/concept/3067"},{"value":"modelling","uri":"http://www.eionet.europa.eu/gemet/concept/5327"},{"value":"river","uri":"http://www.eionet.europa.eu/gemet/concept/7244"},{"value":"catchment","uri":"http://www.eionet.europa.eu/gemet/concept/12231"}],"keywordsTheme":[{"value":"Modelling","uri":"http://onto.nerc.ac.uk/CEHMD/topic/13"},{"value":"Pollution","uri":"http://onto.nerc.ac.uk/CEHMD/topic/15"},{"value":"Water quality","uri":"http://onto.nerc.ac.uk/CEHMD/topic/16"}],"licences":[{"value":"License terms and conditions apply","code":"license","uri":"https://eidc.ceh.ac.uk/licences/global-dilution-factors-estimates/plain"}],"lineage":"The river flow was derived from the 0.5 degree resolution annual and monthly composite runoff fields produced by Fekete et al. (http://www.compositerunoff.sr.unh.edu/). These long term average runoff values were estimated across the globe by combining a simple water balance model and observed river discharge data. The monthly and annual runoff are accumulated using a topographically-derived flow direction grid to produce river flows at a 0.5 degree resolution. The domestic wastewater effluent was obtained by combining population estimates and per capita domestic water use estimates (national estimates). Population estimates were based on the GPW (Gridded population of the world) v.3 data set for 2005 at 0.5 degree resolution (http://sedac.ciesin.columbia.edu/data/set/gpw-v3-population-count-future-estimates). \n\nFour main data sources (public domain) for national per capita domestic water use were used: \n  i) Gleick (2009)\n  ii) Food and Agriculture Organisation (http://www.fao.org/nr/water/aquastat/main/index.stm)\n  iii) World Resource Institute\n  iv) Organisation for Economic Co-operation and Development (http://www.oecd.org/env/indicators-modelling-outlooks/oecdenvironmentaldatacompendium.htm)\n\nWhere discrepancies arose in domestic water use data, only the data for the year 2000 or later was retained, and from these the lowest estimate was selected to provide a more conservative value for the DF. These selected national estimates were then used to derive a 0.5 degree resolution grid of domestic water use.","metadataDate":"2026-07-24T21:15:03","notGEMINI":false,"onlineResources":[{"url":"https://data-package.ceh.ac.uk/sd/42044391-a041-4884-bed7-67f67490224f.zip","name":"Supporting Information","description":"Supporting information available to assist in re-use of this dataset.","function":"information","eidcDistribution":false,"type":"OTHER"}],"publicationDate":"2014-07-11T00:00:00.000Z","publishers":[{"organisationName":"NERC Environmental Information Data Centre","organisationIdentifier":"https://ror.org/04xw4m193","role":"publisher","email":"info@eidc.ac.uk"}],"reasonChanged":"Some discrepancies between monthly dilution factors and annual dilution factors have been noted in some areas. The dataset is unavailable while these are under investigation","resourceIdentifiers":[{"code":"https://catalogue.ceh.ac.uk/id/42044391-a041-4884-bed7-67f67490224f"},{"code":"10.5285/42044391-a041-4884-bed7-67f67490224f","codeSpace":"doi"}],"resourceMaintenance":[{"frequencyOfUpdate":"notPlanned"}],"resourceType":{"value":"dataset"},"spatialReferenceSystems":[{"code":"http://www.opengis.net/def/crs/EPSG/0/4326","title":"WGS 84"}],"spatialRepresentationTypes":["grid"],"spatialResolutions":[{"distance":"0.5","uom":"deg"}],"supplemental":[{"description":"Keller, V.D.J., Williams, R.J., Lofthouse, C. and Johnson, A.C. 2014. Worldwide estimation of river concentrations of any chemical originating from sewage-treatment plants using dilution factors. Environmental Toxicology and Chemistry 33(2), 447-452","url":"https://doi.org/10.1002/etc.2441","function":"relatedArticle"}],"temporalExtents":[{"begin":"2013-12-31"}],"title":"Global dilution factors for domestic wastewater in rivers","topicCategories":[{"value":"inlandWaters","uri":"http://inspire.ec.europa.eu/metadata-codelist/TopicCategory/inlandWaters"}],"topics":["http://onto.nerc.ac.uk/CEHMD/topic/13","http://onto.nerc.ac.uk/CEHMD/topic/15","http://onto.nerc.ac.uk/CEHMD/topic/16"],"type":"dataset","uri":"https://catalogue.ceh.ac.uk/id/42044391-a041-4884-bed7-67f67490224f","useConstraints":[{"value":"License terms and conditions apply","code":"license","uri":"https://eidc.ceh.ac.uk/licences/global-dilution-factors-estimates/plain"},{"value":"Dilution factor values along the coastlines must be handled with care due to higher uncertainty in accounting for population discharging to sea rather than rivers. ","code":"otherRestrictions"},{"value":"User should be aware that higher uncertainties arise when estimating river flows and, hence, dilution factors in catchments smaller than 25 000 km2.","code":"otherRestrictions"}]}