Understanding key factors controlling the duration of river flow intermittency: Case of Burkina Faso in West Africa
Study region: This study focused mainly on Burkina Faso in West Africa. Study focus: This study aims to identify environmental variables that best explain the geographic variations of the flow intermittency regime, focusing on intermittency duration. Discharge data from 49 gauging stations were cons...
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doaj-88e3ce7b157b4176a34b7d6962cba7b32021-10-09T04:38:50ZengElsevierJournal of Hydrology: Regional Studies2214-58182021-10-0137100908Understanding key factors controlling the duration of river flow intermittency: Case of Burkina Faso in West AfricaAxel Patindé Belemtougri0Agnès Ducharne1Fowe Tazen2Ludovic Oudin3Harouna Karambiri4Laboratoire Eaux, HydroSystèmes et Agriculture (LEHSA), Institut International d’Ingénierie de l’Eau et de l’Environnement (2iE), Rue de la Science, 01-BP-594, Ouagadougou 01, Burkina Faso.; Milieux Environnementaux, Transferts et Interactions dans les hydrosystèmes et les Sols (METIS), Sorbonne Université, CNRS, EPHE, 4 place Jussieu 75005, Paris, France.; Corresponding author at: Laboratoire Eaux, HydroSystèmes et Agriculture (LEHSA), Institut International d’Ingénierie de l’Eau et de l’Environnement (2iE), Rue de la Science, 01-BP-594, Ouagadougou 01, Burkina Faso.Milieux Environnementaux, Transferts et Interactions dans les hydrosystèmes et les Sols (METIS), Sorbonne Université, CNRS, EPHE, 4 place Jussieu 75005, Paris, France.Laboratoire Eaux, HydroSystèmes et Agriculture (LEHSA), Institut International d’Ingénierie de l’Eau et de l’Environnement (2iE), Rue de la Science, 01-BP-594, Ouagadougou 01, Burkina Faso.Milieux Environnementaux, Transferts et Interactions dans les hydrosystèmes et les Sols (METIS), Sorbonne Université, CNRS, EPHE, 4 place Jussieu 75005, Paris, France.Laboratoire Eaux, HydroSystèmes et Agriculture (LEHSA), Institut International d’Ingénierie de l’Eau et de l’Environnement (2iE), Rue de la Science, 01-BP-594, Ouagadougou 01, Burkina Faso.Study region: This study focused mainly on Burkina Faso in West Africa. Study focus: This study aims to identify environmental variables that best explain the geographic variations of the flow intermittency regime, focusing on intermittency duration. Discharge data from 49 gauging stations were considered, mostly over large rivers. The mean number of dry months (Ndry¯) was used as a predictor to define four classes of flow intermittency, for which the potential explanatory environmental variables were assessed based on correlation analysis and principal component analysis (PCA). New hydrological insights for the region: The first two components (PCs) account for 82 % of the total variance with PC1 (52 %), and most of the catchments with similar flow intermittency are ordered according to PC2 (30 %), predominantly related to catchment permeability. Moreover, permeability was highly correlated with Ndry¯ (r = - 0.75). Results suggest that catchment permeability and catchment areas are the most critical variables in determining flow intermittency classes in Burkina Faso, as the effect of precipitation can be overruled by the ones of permeability, catchment area, and Strahler order. This study is a first step in understanding the controls of river intermittency in data-scarce and poorly gauged regions of West Africa. The identified variables could be used as input in statistical models to predict and map river intermittency and provide valuable information for stream conservation.http://www.sciencedirect.com/science/article/pii/S2214581821001373Intermittent streamsEphemeral streamsAquifer permeabilityCatchment areaFlow regimePrincipal component analysis |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Axel Patindé Belemtougri Agnès Ducharne Fowe Tazen Ludovic Oudin Harouna Karambiri |
spellingShingle |
Axel Patindé Belemtougri Agnès Ducharne Fowe Tazen Ludovic Oudin Harouna Karambiri Understanding key factors controlling the duration of river flow intermittency: Case of Burkina Faso in West Africa Journal of Hydrology: Regional Studies Intermittent streams Ephemeral streams Aquifer permeability Catchment area Flow regime Principal component analysis |
author_facet |
Axel Patindé Belemtougri Agnès Ducharne Fowe Tazen Ludovic Oudin Harouna Karambiri |
author_sort |
Axel Patindé Belemtougri |
title |
Understanding key factors controlling the duration of river flow intermittency: Case of Burkina Faso in West Africa |
title_short |
Understanding key factors controlling the duration of river flow intermittency: Case of Burkina Faso in West Africa |
title_full |
Understanding key factors controlling the duration of river flow intermittency: Case of Burkina Faso in West Africa |
title_fullStr |
Understanding key factors controlling the duration of river flow intermittency: Case of Burkina Faso in West Africa |
title_full_unstemmed |
Understanding key factors controlling the duration of river flow intermittency: Case of Burkina Faso in West Africa |
title_sort |
understanding key factors controlling the duration of river flow intermittency: case of burkina faso in west africa |
publisher |
Elsevier |
series |
Journal of Hydrology: Regional Studies |
issn |
2214-5818 |
publishDate |
2021-10-01 |
description |
Study region: This study focused mainly on Burkina Faso in West Africa. Study focus: This study aims to identify environmental variables that best explain the geographic variations of the flow intermittency regime, focusing on intermittency duration. Discharge data from 49 gauging stations were considered, mostly over large rivers. The mean number of dry months (Ndry¯) was used as a predictor to define four classes of flow intermittency, for which the potential explanatory environmental variables were assessed based on correlation analysis and principal component analysis (PCA). New hydrological insights for the region: The first two components (PCs) account for 82 % of the total variance with PC1 (52 %), and most of the catchments with similar flow intermittency are ordered according to PC2 (30 %), predominantly related to catchment permeability. Moreover, permeability was highly correlated with Ndry¯ (r = - 0.75). Results suggest that catchment permeability and catchment areas are the most critical variables in determining flow intermittency classes in Burkina Faso, as the effect of precipitation can be overruled by the ones of permeability, catchment area, and Strahler order. This study is a first step in understanding the controls of river intermittency in data-scarce and poorly gauged regions of West Africa. The identified variables could be used as input in statistical models to predict and map river intermittency and provide valuable information for stream conservation. |
topic |
Intermittent streams Ephemeral streams Aquifer permeability Catchment area Flow regime Principal component analysis |
url |
http://www.sciencedirect.com/science/article/pii/S2214581821001373 |
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