Spatiotemporal variability and change in rainfall in the Oti River Basin, West Africa
Understanding rainwater dispersion in a spatiotemporal context is invaluable toward resourceful water management and a food-secure society. This study, therefore, assessed the variations in rainfall at a spatiotemporal scale in the Oti River Basin of West Africa for observed (1981–2010) and future p...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
IWA Publishing
2022-03-01
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| Series: | Journal of Water and Climate Change |
| Subjects: | |
| Online Access: | http://jwcc.iwaponline.com/content/13/3/1151 |
| _version_ | 1811303752749023232 |
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| author | Daniel Kwawuvi Daouda Mama Sampson K. Agodzo Andreas Hartmann Isaac Larbi Enoch Bessah Andrew Manoba Limantol Sam-Quarcoo Dotse Gnibga Issoufou Yangouliba |
| author_facet | Daniel Kwawuvi Daouda Mama Sampson K. Agodzo Andreas Hartmann Isaac Larbi Enoch Bessah Andrew Manoba Limantol Sam-Quarcoo Dotse Gnibga Issoufou Yangouliba |
| author_sort | Daniel Kwawuvi |
| collection | DOAJ |
| description | Understanding rainwater dispersion in a spatiotemporal context is invaluable toward resourceful water management and a food-secure society. This study, therefore, assessed the variations in rainfall at a spatiotemporal scale in the Oti River Basin of West Africa for observed (1981–2010) and future periods (2021–2050) under the representative concentration pathways (RCPs) 4.5 and 8.5 emission scenarios. Rainfall data from meteorological stations and Climate Hazards Group Infrared Precipitation with Stations (CHIRPS) were used. The percentage changes in rainfall for the peak month as well as for rainy and dry seasons under the two climate scenarios were determined. The coefficient of variation (CV) and the standardized anomaly index (SAI) were used to assess annual variations in rainfall. In general, under both emission scenarios, rainfall is projected to decrease over the study area. However, the amount of rainfall during the peak month (August) for RCP4.5 and RCP8.5 could increase by 0.26 and 9.3%, respectively. The highest SAIs for the observed period were +1.58 (2009) and −2.29 (1983) with the latter showing a relationship with historic drought in the basin. The projected SAI under RCP4.5 and RCP8.5 indicated extremely wet (+2.12) and very wet (+1.91) periods for the years 2037 and 2028, respectively. The study provides relevant information and a chance to aid the design of innovative adaptation measures toward efficient water management and agricultural planning for the basin. HIGHLIGHTS
Spatiotemporal rainfall analysis was conducted over the Oti River Basin.;
The performance of climate models is improved when bias-corrected.;
Rainfall is projected to decrease in the basin.;
The decline in rainfall poses a threat to the livelihood of fringed communities.;
The Mann–Kendall test fostered knowledge of rainfall trends in the basin.; |
| first_indexed | 2024-04-13T07:53:37Z |
| format | Article |
| id | doaj.art-75418c1578c94ba393b1e2686d655a44 |
| institution | Directory Open Access Journal |
| issn | 2040-2244 2408-9354 |
| language | English |
| last_indexed | 2024-04-13T07:53:37Z |
| publishDate | 2022-03-01 |
| publisher | IWA Publishing |
| record_format | Article |
| series | Journal of Water and Climate Change |
| spelling | doaj.art-75418c1578c94ba393b1e2686d655a442022-12-22T02:55:28ZengIWA PublishingJournal of Water and Climate Change2040-22442408-93542022-03-011331151116910.2166/wcc.2022.368368Spatiotemporal variability and change in rainfall in the Oti River Basin, West AfricaDaniel Kwawuvi0Daouda Mama1Sampson K. Agodzo2Andreas Hartmann3Isaac Larbi4Enoch Bessah5Andrew Manoba Limantol6Sam-Quarcoo Dotse7Gnibga Issoufou Yangouliba8 Climate Change and Water Resources, West African Science Service Centre on Climate Change and Adapted Land, Use (WASCAL), Universite d'Abomey Calavi, Cotonou 03 BP 526, Benin Institut National de l'Eau, Université d'Abomey-Calavi, Cotonou 03, Benin Department of Agricultural and Biosystems Engineering, Kwame Nkrumah University of Science and Technology, PMB, Kumasi, Ghana Chair of Hydrological Modeling and Water Resources, University of Freiburg, Freiburg im Breisgau, Germany School of Sustainable Development, University of Environment and Sustainable Development, PMB, Somanya, Ghana Department of Agricultural and Biosystems Engineering, Kwame Nkrumah University of Science and Technology, PMB, Kumasi, Ghana School of Sustainable Development, University of Environment and Sustainable Development, PMB, Somanya, Ghana School of Sustainable Development, University of Environment and Sustainable Development, PMB, Somanya, Ghana Climate Change and Water Resources, West African Science Service Centre on Climate Change and Adapted Land, Use (WASCAL), Universite d'Abomey Calavi, Cotonou 03 BP 526, Benin Understanding rainwater dispersion in a spatiotemporal context is invaluable toward resourceful water management and a food-secure society. This study, therefore, assessed the variations in rainfall at a spatiotemporal scale in the Oti River Basin of West Africa for observed (1981–2010) and future periods (2021–2050) under the representative concentration pathways (RCPs) 4.5 and 8.5 emission scenarios. Rainfall data from meteorological stations and Climate Hazards Group Infrared Precipitation with Stations (CHIRPS) were used. The percentage changes in rainfall for the peak month as well as for rainy and dry seasons under the two climate scenarios were determined. The coefficient of variation (CV) and the standardized anomaly index (SAI) were used to assess annual variations in rainfall. In general, under both emission scenarios, rainfall is projected to decrease over the study area. However, the amount of rainfall during the peak month (August) for RCP4.5 and RCP8.5 could increase by 0.26 and 9.3%, respectively. The highest SAIs for the observed period were +1.58 (2009) and −2.29 (1983) with the latter showing a relationship with historic drought in the basin. The projected SAI under RCP4.5 and RCP8.5 indicated extremely wet (+2.12) and very wet (+1.91) periods for the years 2037 and 2028, respectively. The study provides relevant information and a chance to aid the design of innovative adaptation measures toward efficient water management and agricultural planning for the basin. HIGHLIGHTS Spatiotemporal rainfall analysis was conducted over the Oti River Basin.; The performance of climate models is improved when bias-corrected.; Rainfall is projected to decrease in the basin.; The decline in rainfall poses a threat to the livelihood of fringed communities.; The Mann–Kendall test fostered knowledge of rainfall trends in the basin.;http://jwcc.iwaponline.com/content/13/3/1151climateoti river basinrainfallspatiotemporal distributionvariabilitywest africa |
| spellingShingle | Daniel Kwawuvi Daouda Mama Sampson K. Agodzo Andreas Hartmann Isaac Larbi Enoch Bessah Andrew Manoba Limantol Sam-Quarcoo Dotse Gnibga Issoufou Yangouliba Spatiotemporal variability and change in rainfall in the Oti River Basin, West Africa Journal of Water and Climate Change climate oti river basin rainfall spatiotemporal distribution variability west africa |
| title | Spatiotemporal variability and change in rainfall in the Oti River Basin, West Africa |
| title_full | Spatiotemporal variability and change in rainfall in the Oti River Basin, West Africa |
| title_fullStr | Spatiotemporal variability and change in rainfall in the Oti River Basin, West Africa |
| title_full_unstemmed | Spatiotemporal variability and change in rainfall in the Oti River Basin, West Africa |
| title_short | Spatiotemporal variability and change in rainfall in the Oti River Basin, West Africa |
| title_sort | spatiotemporal variability and change in rainfall in the oti river basin west africa |
| topic | climate oti river basin rainfall spatiotemporal distribution variability west africa |
| url | http://jwcc.iwaponline.com/content/13/3/1151 |
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