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[THIS DATASET HAS BEEN WITHDRAWN].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

Identification info

Metadata Language: English (en)

Character set: utf8

Dataset Reference Date (): 2014-07-11

Dataset Reference Date (): 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

UK Centre for Ecology & Hydrology - Dr Virginie Keller

Centre for Ecology & Hydrology - Keller, V.D.J.

Centre for Ecology & Hydrology - Williams, R.

Centre for Ecology & Hydrology - Lofthouse, C.

Centre for Ecology & Hydrology - Johnson, A.C.

NERC EDS Environmental Information Data Centre

NERC Environmental Information Data Centre

Maintenance and update frequency: notPlanned

GEMET - INSPIRE themes, version 1.0 ()

Hydrography

Keywords

Modelling
Pollution
Water quality
Dilution factor
down-the-drain chemicals
catchment
rivers
exposure
environmental risk assessment
PEC
modelling

Limitations on Public Access: otherRestrictions

Other constraints: no limitations

Use constraints: otherRestrictions

Other constraints: License terms and conditions apply

Use constraints: otherRestrictions

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 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 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

Distance: 0.5 urn:ogc:def:uom:EPSG::9001

Topic category

Inland waters

Begin date: 2013-12-31

Code: WGS 84

Distribution Information

Data format

Esri ASCII GRID ()

Resource Locator: Supporting Information
Supporting information available to assist in re-use of this dataset.

Resource Locator: Supporting Information
Supporting information available to assist in re-use of this dataset.

Quality Scope: dataset

Other: dataset

Report

Dataset Reference Date (): 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.

Metadata

File identifier: 42044391-a041-4884-bed7-67f67490224f XML

Metadata Language: English (en)

Character set: ISO/IEC 8859-1 (also known as Latin 1)

Resource type: dataset

Hierarchy level name: dataset

Metadata Date: 2022-08-02T08:39:40

Metadata standard name: UK GEMINI

Metadata standard version: 2.3

Environmental Information Data Centre

Lancaster Environment Centre, Library Avenue, Bailrigg , Lancaster , LA1 4AP , UK

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