Long-term groundwater-level anomalies across Sub-Saharan Africa

Dataset title Long-term groundwater-level anomalies across Sub-Saharan Africa
Dataset creators The Chronicles Consortium
Dataset theme Geoscientific Information
Dataset 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.

Dataset content dates 1st January 1955 – 31st December 2017
Dataset spatial coverage Sub-Saharan Africa:
Benin, Cococodji (6.386N, 2.273E)
Benin, Natitingou (10.317N, 1.383E)
Burkina Faso, Ouagadougou (12.373N, 1.502W)
Ghana, Accra (5.596N, 0.184W)
Namibia, Rooibank (23.188S, 14.656E)
Namibia, Swartbank (23.322S, 14.767E)
Niger, Banizoumbou (13.533N, 2.662E)
Niger, Berkiawel (13.545N, 2.309E)
South Africa, Modderfontein (24.296S, 29.212E)
South Africa, Sterkloop (23.901S, 29.435E)
Tanzania, Makutapora (5.957S, 35.737E)
Uganda, Apac (1.982N, 32.530E)
Uganda, Soroti (1.744N, 33.616E)
Zimbabwe, Khami (19.885S, 28.216E)
Dataset supply format Text file
Dataset language English-United Kingdom
Dataset discovery metadata record Discovery Link to the dataset's BGS Discovery Metadata record
Dataset publisher British Geological Survey
Dataset publication date 8th August 2019
Dataset digital object identifier(DOI) 10.5285/a6d78c2e-3420-4346-9182-4fd437672412
Dataset citation text The Chronicles Consortium (2019): Long-term groundwater-level anomalies across Sub-Saharan Africa. British Geological Survey. (Dataset).
Constraints and terms of use This data set is available under Open Government Licence, subject to the following acknowledgement accompanying any reproduced materials: "Contains data supplied by permission of the Natural Environment Research Council [YEAR]".

Any use of the supplied data requires an acknowledgement of its source: Cuthbert, Taylor et al., 2019. Observed controls on resilience of groundwater to climate variability in sub-Saharan Africa. Nature 572: 230–234.

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