Unravelling the Impacts of Climate Variability on Surface Runoff in the Mouhoun River Catchment (West Africa).
In: Land (2012), Jg. 12 (2023-11-01), Heft 11, S. 2017-2038
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Zugriff:
This study assesses the impacts of climate variability on surface runoff generation in the Mouhoun River Catchment (MRC) in Burkina Faso, in the West African Sahel. The study uses a combination of observed and reanalysis data over the period 1983–2018 to develop a SWAT model (KGE = 0.77/0.89 in calibration/validation) further used to reconstitute the complete time series for surface runoff. Results show that annual rainfall and surface runoff follow a significant upward trend (rainfall: 4.98 mm·year −1 , p-value = 0.029; runoff: 0.45 m 3 ·s −1 ·year −1 , p-value = 0.013). Also, rainfall appears to be the dominant driver of surface runoff (Spearman's ρ = 0.732, p-value < 0.0001), leading surface runoff at all timescales. Surface runoff is further modulated by potential evapotranspiration with quasi-decadal timescales fluctuations, although being less correlated to surface runoff (Spearman's ρ = −0.148, p-value = 0.386). The study highlights the added value of the coupling of hydrological modeling and reanalysis datasets to analyze the rainfall–runoff relationship in data-scarce and poorly gauged environments and therefore raises pathways to improve knowledge and understanding of the impacts of climate variability in Sahelian hydrosystems. [ABSTRACT FROM AUTHOR]
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Titel: |
Unravelling the Impacts of Climate Variability on Surface Runoff in the Mouhoun River Catchment (West Africa).
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Autor/in / Beteiligte Person: | Zouré, Cheick Oumar ; Kiema, Arsène ; Yonaba, Roland ; Minoungou, Bernard |
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Zeitschrift: | Land (2012), Jg. 12 (2023-11-01), Heft 11, S. 2017-2038 |
Veröffentlichung: | 2023 |
Medientyp: | academicJournal |
ISSN: | 2073-445X (print) |
DOI: | 10.3390/land12112017 |
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