Effects of climate and anthropogenic changes on current and future variability in flows in the So'o River Basin (south of Cameroon)
Due to climate and environmental changes, sub-Saharan Africa (SSA) has experienced several drought and flood events in recent decades with serious consequences on the economy of the sub-region. In this context, the region needs to enhance its capacity in water resources management, based on both goo...
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| Format: | Article |
| Language: | English |
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IWA Publishing
2022-09-01
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| Series: | Hydrology Research |
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| Online Access: | http://hr.iwaponline.com/content/53/9/1203 |
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| author | Valentin Brice Ebodé Jean Guy Dzana Elias Nkiaka Bernadette Nka Nnomo Jean Jacques Braun Jean Riotte |
| author_facet | Valentin Brice Ebodé Jean Guy Dzana Elias Nkiaka Bernadette Nka Nnomo Jean Jacques Braun Jean Riotte |
| author_sort | Valentin Brice Ebodé |
| collection | DOAJ |
| description | Due to climate and environmental changes, sub-Saharan Africa (SSA) has experienced several drought and flood events in recent decades with serious consequences on the economy of the sub-region. In this context, the region needs to enhance its capacity in water resources management, based on both good knowledge of contemporary variations in river flows and reliable forecasts. The objective of this article was to study the evolution of current and future (near (2022–2060) and distant (2061–2100)) flows in the So'o River Basin (SRB) in Cameroon. To achieve this, the Pettitt and modified Mann–Kendall tests were used to analyze hydrometeorological time series in the basin. The Soil and Water Assessment Tool (SWAT) model was used to simulate the future flows in the SRB. The results obtained show that for the current period, the flows of the So'o decrease due to the decrease in precipitation. For future periods, a change in precipitation in line with the predictions of the CCCma model will lead to a decrease in river discharge in the basin, except under the RCP8.5 scenario during the second period (2061–2100), where we note an increase compared to the historical period of approximately +4%. Results from the RCA4 model project an increase in precipitation which will lead to an increase in river discharge by more than +50%, regardless of the period and the scenario considered. An increase in discharges was noted in some cases despite a drop in rainfall, particularly in the case of discharges simulated for the second period (2061–2100) from the outputs of the CCCma model. This seems to be a consequence of the increase in impervious spaces, all the more the runoff increases during this period according to the model. Results from this study could be used to enhance water resources management in the basin investigated and the region.
HIGHLIGHTS
Impact of current climate change and anthropization on river discharge in equatorial central Africa.;
Impact of future climate change and anthropization on river discharge in equatorial central Africa.; |
| first_indexed | 2024-04-11T10:04:29Z |
| format | Article |
| id | doaj.art-ea2addc66b4d47e9a5e290c8609296a3 |
| institution | Directory Open Access Journal |
| issn | 1998-9563 2224-7955 |
| language | English |
| last_indexed | 2024-04-11T10:04:29Z |
| publishDate | 2022-09-01 |
| publisher | IWA Publishing |
| record_format | Article |
| series | Hydrology Research |
| spelling | doaj.art-ea2addc66b4d47e9a5e290c8609296a32022-12-22T04:30:17ZengIWA PublishingHydrology Research1998-95632224-79552022-09-015391203122010.2166/nh.2022.047047Effects of climate and anthropogenic changes on current and future variability in flows in the So'o River Basin (south of Cameroon)Valentin Brice Ebodé0Jean Guy Dzana1Elias Nkiaka2Bernadette Nka Nnomo3Jean Jacques Braun4Jean Riotte5 Department of Geography, University of Yaounde 1, Yaounde, P.O. Box 755, Cameroon Department of Geography, University of Yaounde 1, Yaounde, P.O. Box 755, Cameroon Department of Geography, University of Sheffield, Sheffield S10 2TN, South Yorkshire, UK Institute of Mining and Geological Research (IRGM), Hydrological Research Center, Yaounde, P.O. Box 4110, Cameroon International Joint Laboratory DYCOFAC, IRGM-UY1-IRD, Yaounde BP 1857, Cameroon Indo-French Cell for Water Sciences, Joint IRD-IISc Laboratory, Indian Institute of Science, Bangalore, India Due to climate and environmental changes, sub-Saharan Africa (SSA) has experienced several drought and flood events in recent decades with serious consequences on the economy of the sub-region. In this context, the region needs to enhance its capacity in water resources management, based on both good knowledge of contemporary variations in river flows and reliable forecasts. The objective of this article was to study the evolution of current and future (near (2022–2060) and distant (2061–2100)) flows in the So'o River Basin (SRB) in Cameroon. To achieve this, the Pettitt and modified Mann–Kendall tests were used to analyze hydrometeorological time series in the basin. The Soil and Water Assessment Tool (SWAT) model was used to simulate the future flows in the SRB. The results obtained show that for the current period, the flows of the So'o decrease due to the decrease in precipitation. For future periods, a change in precipitation in line with the predictions of the CCCma model will lead to a decrease in river discharge in the basin, except under the RCP8.5 scenario during the second period (2061–2100), where we note an increase compared to the historical period of approximately +4%. Results from the RCA4 model project an increase in precipitation which will lead to an increase in river discharge by more than +50%, regardless of the period and the scenario considered. An increase in discharges was noted in some cases despite a drop in rainfall, particularly in the case of discharges simulated for the second period (2061–2100) from the outputs of the CCCma model. This seems to be a consequence of the increase in impervious spaces, all the more the runoff increases during this period according to the model. Results from this study could be used to enhance water resources management in the basin investigated and the region. HIGHLIGHTS Impact of current climate change and anthropization on river discharge in equatorial central Africa.; Impact of future climate change and anthropization on river discharge in equatorial central Africa.;http://hr.iwaponline.com/content/53/9/1203change in land use modesclimate changecurrent dischargesfuture dischargesregional climate modelssouthern cameroon |
| spellingShingle | Valentin Brice Ebodé Jean Guy Dzana Elias Nkiaka Bernadette Nka Nnomo Jean Jacques Braun Jean Riotte Effects of climate and anthropogenic changes on current and future variability in flows in the So'o River Basin (south of Cameroon) Hydrology Research change in land use modes climate change current discharges future discharges regional climate models southern cameroon |
| title | Effects of climate and anthropogenic changes on current and future variability in flows in the So'o River Basin (south of Cameroon) |
| title_full | Effects of climate and anthropogenic changes on current and future variability in flows in the So'o River Basin (south of Cameroon) |
| title_fullStr | Effects of climate and anthropogenic changes on current and future variability in flows in the So'o River Basin (south of Cameroon) |
| title_full_unstemmed | Effects of climate and anthropogenic changes on current and future variability in flows in the So'o River Basin (south of Cameroon) |
| title_short | Effects of climate and anthropogenic changes on current and future variability in flows in the So'o River Basin (south of Cameroon) |
| title_sort | effects of climate and anthropogenic changes on current and future variability in flows in the so o river basin south of cameroon |
| topic | change in land use modes climate change current discharges future discharges regional climate models southern cameroon |
| url | http://hr.iwaponline.com/content/53/9/1203 |
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