Journal article
Observed changes in monthly baseflow across Africa
Hydrological sciences journal, Vol.68(1), pp.108-118
2023
DOI: 10.1080/02626667.2022.2144320
Abstract
Baseflow is an important water resource because it supplies streamflow between precipitation events and during dry seasons. We report the first continental assessment of baseflow in Africa by analyzing the baseflow index, baseflow seasonality, and monthly baseflow trends for three periods (1950–2018, 1950–1980, and 1981–2018). To explain changes in baseflow, we analyze precipitation trends. Results highlight that the baseflow season in west-central Africa occurs during August–November. In southern and northern Africa, the baseflow season is similar (January–May and January–April, respectively). Trend analysis detected monthly baseflow decreases in west-central Africa over the entire record and from 1950 to 1980, with increases after 1980. A clear pattern was absent in southern Africa for the whole record, but increases were detected earlier and decreases from 1981 to 2018. In northern Africa, decreasing baseflow trends were pronounced over the whole record, with no clear shift present. Precipitation trends were only consistent with baseflow changes in west-central Africa.
Details
- Title: Subtitle
- Observed changes in monthly baseflow across Africa
- Creators
- Jessica R. Ayers - University of California, BerkeleyGabriele Villarini - University of IowaYves Tramblay - University of MontpellierHanbeen Kim - University of Iowa
- Resource Type
- Journal article
- Publication Details
- Hydrological sciences journal, Vol.68(1), pp.108-118
- Publisher
- Taylor & Francis
- DOI
- 10.1080/02626667.2022.2144320
- ISSN
- 0262-6667
- eISSN
- 2150-3435
- Grant note
- DOI: 10.13039/100000001, name: NSF; name: U.S. Army Corps of Engineers’ Institute for Water Resources; name: Thomas Jefferson Fund of the Embassy of France in the United States and the FACE Foundation
- Language
- English
- Electronic publication date
- 12/05/2022
- Date published
- 2023
- Academic Unit
- Civil and Environmental Engineering; IIHR--Hydroscience and Engineering
- Record Identifier
- 9984322833402771
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