Identification
Title
Long-term groundwater-level anomalies across Sub-Saharan Africa (NERC grant NE/M008932/1)
Abstract
Multi-decadal time series of groundwater levels were compiled by the authors from records of observation wells initiated and maintained by government departments and research institutions in nine countries in sub-Saharan Africa. The pan-African collation of these hydrographs was initiated at the 41st Congress of the International Association of Hydrogeologists (IAH) in Marrakech (Morocco) on 14th September 2014. All records were subjected to a rigorous review by the authors during which the integrity, continuity, duration and interpretability of records were evaluated. This process included dedicated workshops in Benin, Tanzania, and Uganda, and records failing these tests were discarded from the analysis. Procedures included taking of the first time derivative to identify anomalous spikes in records commonly associated with errors of data-entry. Where multiple records in same geographic and climate zone were available (e.g. Benin, South Africa) we prioritized records remote from potential areas of intensive abstraction. Statistical clustering of records was also used in the Limpopo Basin of South Africa to identify the representativity of employed records at Modderfontein and Sterkloop.
Resource type
dataset
Resource locator
https://www.bgs.ac.uk/services/ngdc/accessions/index.html#item127973
function:
download
https://www.bgs.ac.uk/services/ngdc/citedData/catalogue/a6d78c2e-3420-4346-9182-4fd437672412.html
function:
information
https://www.nature.com/articles/s41586-019-1441-7
function:
information
Unique resource identifier
code
http://data.bgs.ac.uk/id/dataHolding/13607465
codeSpace
Dataset language
eng
Spatial reference system
code identifying the spatial reference system
Classification of spatial data and services
Topic category
geoscientificInformation
Keywords
Keyword set
keyword value
originating controlled vocabulary
title
GEMET - INSPIRE themesreference date
date type
publication
effective date
2008-06-01
Keyword set
keyword value
Ground water level
originating controlled vocabulary
title
BGS Thesaurus of Geosciencesreference date
date type
revision
effective date
2011
Keyword set
keyword value
NERC_DDC
Geographic location
West bounding longitude
-1.5000
East bounding longitude
35.7400
North bounding latitude
13.5500
South bounding latitude
-24.2900
Extent
Extent group
authority code
title
ISO 3166_1 alpha-3reference date
date type
revision
effective date
2009
code identifying the extent
BEN
Extent group
authority code
title
British Geological Survey Gazetteer: Geographical hierarchy from Geosaurusreference date
date type
creation
effective date
1979
code identifying the extent
BENIN [id=630000]
Extent group
authority code
title
ISO 3166_1 alpha-2reference date
date type
revision
effective date
2009
code identifying the extent
BF
Extent group
authority code
title
ISO 3166_1 alpha-3reference date
date type
revision
effective date
2009
code identifying the extent
BFA
Extent group
authority code
title
ISO 3166_1 alpha-2reference date
date type
revision
effective date
2009
code identifying the extent
BJ
Extent group
authority code
title
British Geological Survey Gazetteer: Geographical hierarchy from Geosaurusreference date
date type
creation
effective date
1979
code identifying the extent
BURKINA FASO [id=626000]
Extent group
authority code
title
ISO 3166_1 alpha-2reference date
date type
revision
effective date
2009
code identifying the extent
GH
Extent group
authority code
title
ISO 3166_1 alpha-3reference date
date type
revision
effective date
2009
code identifying the extent
GHA
Extent group
authority code
title
British Geological Survey Gazetteer: Geographical hierarchy from Geosaurusreference date
date type
creation
effective date
1979
code identifying the extent
GHANA [id=632000]
Extent group
authority code
title
ISO 3166_1 alpha-2reference date
date type
revision
effective date
2009
code identifying the extent
NA
Extent group
authority code
title
ISO 3166_1 alpha-3reference date
date type
revision
effective date
2009
code identifying the extent
NAM
Extent group
authority code
title
British Geological Survey Gazetteer: Geographical hierarchy from Geosaurusreference date
date type
creation
effective date
1979
code identifying the extent
NAMIBIA [id=665000]
Extent group
authority code
title
ISO 3166_1 alpha-2reference date
date type
revision
effective date
2009
code identifying the extent
NE
Extent group
authority code
title
ISO 3166_1 alpha-3reference date
date type
revision
effective date
2009
code identifying the extent
NER
Extent group
authority code
title
British Geological Survey Gazetteer: Geographical hierarchy from Geosaurusreference date
date type
creation
effective date
1979
code identifying the extent
NIGER [id=627000]
Extent group
authority code
title
British Geological Survey Gazetteer: Geographical hierarchy from Geosaurusreference date
date type
creation
effective date
1979
code identifying the extent
SOUTH AFRICA [id=670000]
Extent group
authority code
title
British Geological Survey Gazetteer: Geographical hierarchy from Geosaurusreference date
date type
creation
effective date
1979
code identifying the extent
TANZANIA [id=685000]
Extent group
authority code
title
ISO 3166_1 alpha-2reference date
date type
revision
effective date
2009
code identifying the extent
UG
Extent group
authority code
title
ISO 3166_1 alpha-3reference date
date type
revision
effective date
2009
code identifying the extent
UGA
Extent group
authority code
title
British Geological Survey Gazetteer: Geographical hierarchy from Geosaurusreference date
date type
creation
effective date
1979
code identifying the extent
UGANDA [id=689000]
Extent group
authority code
title
ISO 3166_1 alpha-2reference date
date type
revision
effective date
2009
code identifying the extent
ZA
Extent group
authority code
title
ISO 3166_1 alpha-3reference date
date type
revision
effective date
2009
code identifying the extent
ZAF
Extent group
authority code
title
British Geological Survey Gazetteer: Geographical hierarchy from Geosaurusreference date
date type
creation
effective date
1979
code identifying the extent
ZIMBABWE [id=677000]
Extent group
authority code
title
ISO 3166_1 alpha-2reference date
date type
revision
effective date
2009
code identifying the extent
ZW
Extent group
authority code
title
ISO 3166_1 alpha-3reference date
date type
revision
effective date
2009
code identifying the extent
ZWE
Temporal reference
Temporal extent
Begin position
1955-01-01
End position
2017-12-31
Dataset reference date
date type
creation
effective date
2019-05-21
Frequency of update
notApplicable
Quality and validity
Lineage
Infilling of occasional gaps of less than a week in daily groundwater-level records was achieved by linear interpolation. Because permission to enable access to absolute values of groundwater levels and precipitation at all locations in this dataset has not been granted, both datasets are provided as anomalies with respect to the long-term value for the period of observation.
Conformity
Conformity report
specification
title
INSPIRE Implementing rules laying down technical arrangements for the interoperability and harmonisation of Geologyreference date
date type
publication
effective date
2011
degree
false
explanation
See the referenced specification
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 servicesreference date
date type
publication
effective date
2010-12-08
degree
false
explanation
See http://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=OJ:L:2010:323:0011:0102:EN:PDF
Data format
name of format
Text File
version of format
Constraints related to access and use
Constraint set
Limitations on public access
Constraint set
Limitations on public access
The copyright of materials derived from the British Geological Survey's work is vested in the Natural Environment Research Council [NERC]. No part of this work may be reproduced or transmitted in any form or by any means, or stored in a retrieval system of any nature, without the prior permission of the copyright holder, via the BGS Intellectual Property Rights Manager. Use by customers of information provided by the BGS, is at the customer's own risk. In view of the disparate sources of information at BGS's disposal, including such material donated to BGS, that BGS accepts in good faith as being accurate, the Natural Environment Research Council (NERC) gives no warranty, expressed or implied, as to the quality or accuracy of the information supplied, or to the information's suitability for any use. NERC/BGS accepts no liability whatever in respect of loss, damage, injury or other occurence however caused.
Responsible organisations
Responsible party
contact position
Department of Geography
organisation name
University College London
full postal address
Gower Street
London
WC1E 6BT
email address
not available
responsible party role
pointOfContact
Responsible party
contact position
Department of Geography
organisation name
University College London
full postal address
Gower Street
London
WC1E 6BT
email address
not available
responsible party role
principalInvestigator
Metadata on metadata
Metadata point of contact
organisation name
British Geological Survey
full postal address
Environmental Science Centre,Keyworth
NOTTINGHAM
NG12 5GG
United Kingdom
telephone number
+44 115 936 3100
email address
enquiries@bgs.ac.uk
responsible party role
pointOfContact
Metadata date
2022-12-07
Metadata language
eng