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Long-term groundwater-level anomalies across Sub-Saharan Africa (NERC grant NE/M008932/1)

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.

Default

Identification info

Metadata Language
English (en)
Dataset Reference Date ()
2019-05-21
Identifier

http://data.bgs.ac.uk/id/dataHolding/13607465

 

University College London

-

Professor Richard Taylor

(

Department of Geography

)

Gower Street

,

London

,

WC1E 6BT

,
 

University College London

-

Professor Richard Taylor

(

Department of Geography

)

Gower Street

,

London

,

WC1E 6BT

,
Maintenance and update frequency
notApplicable
GEMET - INSPIRE themes
  • Geology
BGS Thesaurus of Geosciences
  • Ground water level

Keywords
  • NERC_DDC

Limitations on Public Access
otherRestrictions
Other constraints
no limitations
Other constraints
The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.
Use constraints
otherRestrictions
Other constraints

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.

Other constraints

Available under the Open Government Licence subject to the following acknowledgement accompanying the reproduced NERC materials "Contains NERC materials ©NERC [year]"

Topic category
  • Geoscientific information
Extent

BEN

Dataset Reference Date ()
2009

Extent

BENIN [id=630000]

Dataset Reference Date ()
1979

Extent

BF

Dataset Reference Date ()
2009

Extent

BFA

Dataset Reference Date ()
2009

Extent

BJ

Dataset Reference Date ()
2009

Extent

BURKINA FASO [id=626000]

Dataset Reference Date ()
1979

Extent

GH

Dataset Reference Date ()
2009

Extent

GHA

Dataset Reference Date ()
2009

Extent

GHANA [id=632000]

Dataset Reference Date ()
1979

Extent

NA

Dataset Reference Date ()
2009

Extent

NAM

Dataset Reference Date ()
2009

Extent

NAMIBIA [id=665000]

Dataset Reference Date ()
1979

Extent

NE

Dataset Reference Date ()
2009

Extent

NER

Dataset Reference Date ()
2009

Extent

NIGER [id=627000]

Dataset Reference Date ()
1979

Extent

SOUTH AFRICA [id=670000]

Dataset Reference Date ()
1979

Extent

TANZANIA [id=685000]

Dataset Reference Date ()
1979

Extent

UG

Dataset Reference Date ()
2009

Extent

UGA

Dataset Reference Date ()
2009

Extent

UGANDA [id=689000]

Dataset Reference Date ()
1979

Extent

ZA

Dataset Reference Date ()
2009

Extent

ZAF

Dataset Reference Date ()
2009

Extent

ZIMBABWE [id=677000]

Dataset Reference Date ()
1979

Extent

ZW

Dataset Reference Date ()
2009

Extent

ZWE

Dataset Reference Date ()
2009

N
S
E
W


Begin date
1955-01-01
End date
2017-12-31
 

Spatial Reference System

No information provided.

Distribution Information

Data format
  • Text File

    ()

Resource Locator
https://www.bgs.ac.uk/services/ngdc/accessions/index.html#item127973
Resource Locator
https://www.bgs.ac.uk/services/ngdc/citedData/catalogue/a6d78c2e-3420-4346-9182-4fd437672412.html
Resource Locator
https://www.nature.com/articles/s41586-019-1441-7
Resource Locator
https://www.bgs.ac.uk/services/ngdc/accessions/index.html#item127973
Resource Locator
https://www.bgs.ac.uk/services/ngdc/citedData/catalogue/a6d78c2e-3420-4346-9182-4fd437672412.html
Resource Locator
https://www.nature.com/articles/s41586-019-1441-7
 
Quality Scope
dataset
Other

dataset

Report

Dataset Reference Date ()
2011
Explanation

See the referenced specification

Degree

Report

Dataset Reference Date ()
2010-12-08
Explanation

See http://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=OJ:L:2010:323:0011:0102:EN:PDF

Degree
Statement

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.

Metadata

File identifier
897af404-d0d9-5801-e054-002128a47908 XML
Metadata Language
English (en)
Resource type
dataset
Metadata Date
2023-01-23
Metadata standard name
UK GEMINI
Metadata standard version

2.3

 

British Geological Survey


Environmental Science Centre,Keyworth

,

NOTTINGHAM

,

NOTTINGHAMSHIRE

,

NG12 5GG

,

United Kingdom

+44 115 936 3100
 
 

Overviews

N
S
E
W



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