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Global dilution factors for domestic wastewater in rivers

[THIS DATASET HAS BEEN WITHDRAWN]. 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. Full details about this dataset can be found at https://doi.org/10.5285/42044391-a041-4884-bed7-67f67490224f

Simple

Date (Publication)
2014-07-11
Date (Creation)
2013-12-31
Identifier
https://catalogue.ceh.ac.uk/id/42044391-a041-4884-bed7-67f67490224f
Identifier
doi: / 10.5285/42044391-a041-4884-bed7-67f67490224f
Other citation details
Keller, V.D.J., Williams, R., Lofthouse, C., Johnson, A.C. (2014). Global dilution factors for domestic wastewater in rivers. NERC Environmental Information Data Centre 10.5285/42044391-a041-4884-bed7-67f67490224f
Point of contact
  UK Centre for Ecology & Hydrology - Keller, V.
Author
  Centre for Ecology & Hydrology - Keller, V.D.J.
https://orcid.org/0000-0003-4489-5363
Author
  Centre for Ecology & Hydrology - Williams, R.
Author
  Centre for Ecology & Hydrology - Lofthouse, C.
Author
  Centre for Ecology & Hydrology - Johnson, A.C.
https://orcid.org/0000-0003-1570-3764
Custodian
  NERC EDS Environmental Information Data Centre
Publisher
  NERC Environmental Information Data Centre
Maintenance and update frequency
notPlanned Not planned
GEMET - INSPIRE themes, version 1.0
  • Hydrography
Access constraints
otherRestrictions Other restrictions
Other constraints
Withdrawn
Use constraints
otherRestrictions Other restrictions
Other constraints
License terms and conditions apply
Use constraints
otherRestrictions Other restrictions
Other constraints
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.
Use constraints
otherRestrictions Other restrictions
Other constraints
User should be aware that higher uncertainties arise when estimating river flows and, hence, dilution factors in catchments smaller than 25 000 km2.
Use constraints
otherRestrictions Other restrictions
Other constraints
If you reuse this data, you should cite: Keller, V.D.J., Williams, R., Lofthouse, C., Johnson, A.C. (2014). Global dilution factors for domestic wastewater in rivers. NERC Environmental Information Data Centre https://doi.org/10.5285/42044391-a041-4884-bed7-67f67490224f
Spatial representation type
grid Grid
Distance
0.5  urn:ogc:def:uom:EPSG::9001
Metadata language
EnglishEnglish
Character set
utf8 UTF8
Topic category
  • Inland waters
Begin date
2013-12-31
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Unique resource identifier
WGS 84
Distribution format
  • Esri ASCII GRID ()

Distributor
  NERC EDS Environmental Information Data Centre
OnLine resource
Supporting Information

Supporting information available to assist in re-use of this dataset.

Hierarchy level
dataset Dataset
Other
dataset

Conformance result

Date (Publication)
2010-12-08
Statement
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). Four main data sources (public domain) for national per capita domestic water use were used: i) Gleick (2009) ii) Food and Agriculture Organisation (http://www.fao.org/nr/water/aquastat/main/index.stm) iii) World Resource Institute iv) Organisation for Economic Co-operation and Development (http://www.oecd.org/env/indicators-modelling-outlooks/oecdenvironmentaldatacompendium.htm) Where 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.
File identifier
42044391-a041-4884-bed7-67f67490224f XML
Metadata language
EnglishEnglish
Character set
ISO/IEC 8859-1 (also known as Latin 1) 8859 Part 1
Hierarchy level
dataset Dataset
Hierarchy level name
dataset
Date stamp
2025-03-21T13:22:17
Metadata standard name
UK GEMINI
Metadata standard version
2.3
Point of contact
  NERC EDS Environmental Information Data Centre
Lancaster Environment Centre, Library Avenue, Bailrigg , Lancaster , LA1 4AP , UK
https://eidc.ac.uk/
 
 

Overviews

Spatial extent

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Keywords

GEMET - INSPIRE themes, version 1.0
Hydrography

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