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.
 
Citation proposal
. Long-term groundwater-level anomalies across Sub-Saharan Africa (NERC grant NE/M008932/1). https://metadata.bgs.ac.uk/geonetwork/srv/api/records/897af404-d0d9-5801-e054-002128a47908

Simple

Date ( Creation )
2019-05-21
Identifier
http://data.bgs.ac.uk/id/dataHolding/13607465

  Point of contact

  Principal investigator

Maintenance and update frequency
notApplicable notApplicable
GEMET - INSPIRE themes
  • Geology
BGS Thesaurus of Geosciences
  • Ground water level
Keywords
  • NERC_DDC
Access constraints
otherRestrictions Other restrictions
Use constraints
otherRestrictions Other restrictions
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]"
Metadata language
English English
Topic category
  • Geoscientific information
Geographic identifier
BEN

 

Date ( Revision )
2009

Geographic identifier
BENIN [id=630000]

 

Date ( Creation )
1979

Geographic identifier
BF

 

Date ( Revision )
2009

Geographic identifier
BFA

 

Date ( Revision )
2009

Geographic identifier
BJ

 

Date ( Revision )
2009

Geographic identifier
BURKINA FASO [id=626000]

 

Date ( Creation )
1979

Geographic identifier
GH

 

Date ( Revision )
2009

Geographic identifier
GHA

 

Date ( Revision )
2009

Geographic identifier
GHANA [id=632000]

 

Date ( Creation )
1979

Geographic identifier
NA

 

Date ( Revision )
2009

Geographic identifier
NAM

 

Date ( Revision )
2009

Geographic identifier
NAMIBIA [id=665000]

 

Date ( Creation )
1979

Geographic identifier
NE

 

Date ( Revision )
2009

Geographic identifier
NER

 

Date ( Revision )
2009

Geographic identifier
NIGER [id=627000]

 

Date ( Creation )
1979

Geographic identifier
SOUTH AFRICA [id=670000]

 

Date ( Creation )
1979

Geographic identifier
TANZANIA [id=685000]

 

Date ( Creation )
1979

Geographic identifier
UG

 

Date ( Revision )
2009

Geographic identifier
UGA

 

Date ( Revision )
2009

Geographic identifier
UGANDA [id=689000]

 

Date ( Creation )
1979

Geographic identifier
ZA

 

Date ( Revision )
2009

Geographic identifier
ZAF

 

Date ( Revision )
2009

Geographic identifier
ZIMBABWE [id=677000]

 

Date ( Creation )
1979

Geographic identifier
ZW

 

Date ( Revision )
2009

Geographic identifier
ZWE

 

Date ( Revision )
2009

N
S
E
W


Reference System Information

No information provided.
Distribution format
  • Text File ()

OnLine resource
https://www.bgs.ac.uk/services/ngdc/accessions/index.html#item127973  
OnLine resource
https://www.bgs.ac.uk/services/ngdc/citedData/catalogue/a6d78c2e-3420-4346-9182-4fd437672412.html  
OnLine resource
https://www.nature.com/articles/s41586-019-1441-7  
Hierarchy level
dataset Dataset
Other
dataset

Conformance result

Date ( Publication )
2011
Explanation
See the referenced specification
Pass
false

Conformance result

Date ( Publication )
2010-12-08
Explanation
See http://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=OJ:L:2010:323:0011:0102:EN:PDF
Pass
false
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.

gmd:MD_Metadata

File identifier
897af404-d0d9-5801-e054-002128a47908   XML
Metadata language
English English
Hierarchy level
dataset Dataset
Date stamp
2021-04-19
Metadata standard version
2.3

  Point of contact

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

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