Identification

Title

Global dilution factors for domestic wastewater in rivers

Abstract

[THIS DATASET HAS BEEN WITHDRAWN].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

Resource type

dataset

Resource locator

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

Unique resource identifier

code

https://catalogue.ceh.ac.uk/id/42044391-a041-4884-bed7-67f67490224f

codeSpace

doi:

Dataset language

eng

Spatial reference system

code identifying the spatial reference system

Classification of spatial data and services

Topic category

inlandWaters

Keywords

Keyword set

keyword value

Hydrography

originating controlled vocabulary

title

GEMET - INSPIRE themes, version 1.0

reference date

date type

publication

effective date

2008-06-01

Keyword set

keyword value

Dilution factor

down-the-drain chemicals

catchment

rivers

exposure

environmental risk assessment

PEC

modelling

Geographic location

West bounding longitude

-180

East bounding longitude

180

North bounding latitude

83

South bounding latitude

-55.5

Temporal reference

Temporal extent

Begin position

2013-12-31

End position

Dataset reference date

date type

publication

effective date

2014-07-11

date type

creation

effective date

2013-12-31

Frequency of update

notPlanned

Quality and validity

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). 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.

Conformity

Conformity report

specification

title

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

reference date

date type

publication

effective date

2010-12-08

degree

explanation

Data format

name of format

Esri ASCII GRID

version of format

Constraints related to access and use

Constraint set

Limitations on public access

Constraint set

Limitations on public access

Constraint set

Limitations on public access

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.

Constraint set

Limitations on public access

User should be aware that higher uncertainties arise when estimating river flows and, hence, dilution factors in catchments smaller than 25 000 km2.

Constraint set

Limitations on public access

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

Responsible organisations

Responsible party

organisation name

UK Centre for Ecology & Hydrology

email address

enquiries@ceh.ac.uk

responsible party role

pointOfContact

Responsible party

organisation name

Centre for Ecology & Hydrology

email address

enquiries@ceh.ac.uk

responsible party role

author

Responsible party

organisation name

Centre for Ecology & Hydrology

email address

enquiries@ceh.ac.uk

responsible party role

author

Responsible party

organisation name

Centre for Ecology & Hydrology

email address

enquiries@ceh.ac.uk

responsible party role

author

Responsible party

organisation name

Centre for Ecology & Hydrology

email address

enquiries@ceh.ac.uk

responsible party role

author

Responsible party

organisation name

NERC EDS Environmental Information Data Centre

email address

enquiries@ceh.ac.uk

responsible party role

custodian

Responsible party

organisation name

NERC Environmental Information Data Centre

email address

enquiries@ceh.ac.uk

responsible party role

publisher

Metadata on metadata

Metadata point of contact

organisation name

Environmental Information Data Centre

full postal address

Lancaster Environment Centre, Library Avenue, Bailrigg

Lancaster

LA1 4AP

UK

email address

info@eidc.ac.uk

responsible party role

pointOfContact

Metadata date

2022-08-02T08:39:40

Metadata language

eng