The Phenomenology of West African Coastal Rainfall Events Based on a New Rain Gauge Network over Abidjan (Côte d’Ivoire)
In the District of Abidjan, flooding typically occurs suddenly during intense rainfall events. The individual rainfall event provides the basic element for the study. Its analysis is required to develop solutions for managing the impact of extreme rainfall occurrences. Our study proposes to identify...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-08-01
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| Series: | Atmosphere |
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| Online Access: | https://www.mdpi.com/2073-4433/14/9/1322 |
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| author | Modeste Kacou Eric-Pascal Zahiri Kouakou Christian Yao Luc Séguis Clément Dutremble Ehouman Serge Koffi Jean-Louis Perrin Amidou Dao Angah Armel Fourier Kodji Kouamé Fréjus Konan Kouassi Tandji Tewa |
| author_facet | Modeste Kacou Eric-Pascal Zahiri Kouakou Christian Yao Luc Séguis Clément Dutremble Ehouman Serge Koffi Jean-Louis Perrin Amidou Dao Angah Armel Fourier Kodji Kouamé Fréjus Konan Kouassi Tandji Tewa |
| author_sort | Modeste Kacou |
| collection | DOAJ |
| description | In the District of Abidjan, flooding typically occurs suddenly during intense rainfall events. The individual rainfall event provides the basic element for the study. Its analysis is required to develop solutions for managing the impact of extreme rainfall occurrences. Our study proposes to identify individual rainfall events that occurred in the District of Abidjan from a densified network and analyze some of their characteristics related to the amount of rainfall they provided, their duration, and their level of intensity. A total of 1240 individual rainfall events were identified between 2018 and 2021 using a network of 21 rain gauges. Rainfall events were identified based on criteria such as a minimum inter-event time without rainfall of 30 min, a detection threshold of 0.02 mm/5 min, a minimum duration of 30 min applicable to the average hyetograph, and a minimum of 1 mm of rainfall in at least one rain gauge. The analysis of characteristics related to accumulation, intensity, and duration showed that the rainfall events were essentially convective, with an average duration of more than 2 h and a rainfall of 11.30 mm/event. For 70% of the rainfall events of a mixed nature, the convective episodes last up to 33.33% of the total duration of the event and produce an average of 80% of the cumulative rainfall. The 30-min peak intensities generally occur in the first half of the event. Less than 13.5% of the events have peaks greater than 50 mm/h. The probability of observing more than two, three, or four events per day is high in June and October, the core of the two rainy seasons. |
| first_indexed | 2024-03-10T23:03:08Z |
| format | Article |
| id | doaj.art-0359d994e17f456fb5a8ca3729ed6fb9 |
| institution | Directory Open Access Journal |
| issn | 2073-4433 |
| language | English |
| last_indexed | 2024-03-10T23:03:08Z |
| publishDate | 2023-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Atmosphere |
| spelling | doaj.art-0359d994e17f456fb5a8ca3729ed6fb92023-11-19T09:29:42ZengMDPI AGAtmosphere2073-44332023-08-01149132210.3390/atmos14091322The Phenomenology of West African Coastal Rainfall Events Based on a New Rain Gauge Network over Abidjan (Côte d’Ivoire)Modeste Kacou0Eric-Pascal Zahiri1Kouakou Christian Yao2Luc Séguis3Clément Dutremble4Ehouman Serge Koffi5Jean-Louis Perrin6Amidou Dao7Angah Armel Fourier Kodji8Kouamé Fréjus Konan9Kouassi Tandji Tewa10Laboratoire des Sciences de la Matière, de l’Environnement et de l’Energie Solaire (LASMES), Université Félix Houphouët-Boigny, Abidjan 22 BP 582, Côte d’IvoireLaboratoire des Sciences de la Matière, de l’Environnement et de l’Energie Solaire (LASMES), Université Félix Houphouët-Boigny, Abidjan 22 BP 582, Côte d’IvoireLaboratoire des Sciences de la Matière, de l’Environnement et de l’Energie Solaire (LASMES), Université Félix Houphouët-Boigny, Abidjan 22 BP 582, Côte d’IvoireLaboratoire des Sciences de la Matière, de l’Environnement et de l’Energie Solaire (LASMES), Université Félix Houphouët-Boigny, Abidjan 22 BP 582, Côte d’IvoireHydroSciences Montpellier (HSM), Institut de Recherche pour le Développement (IRD), Université de Montpellier, 34000 Montpellier, FranceLaboratoire Géosciences et Environnement (LGE), Université Nangui Abrogoua, Abidjan 02 BP 801, Côte d’IvoireHydroSciences Montpellier (HSM), Institut de Recherche pour le Développement (IRD), Université de Montpellier, 34000 Montpellier, FranceLaboratoire Géosciences et Environnement (LGE), Université Nangui Abrogoua, Abidjan 02 BP 801, Côte d’IvoireLaboratoire des Sciences de la Matière, de l’Environnement et de l’Energie Solaire (LASMES), Université Félix Houphouët-Boigny, Abidjan 22 BP 582, Côte d’IvoireLaboratoire des Sciences de la Matière, de l’Environnement et de l’Energie Solaire (LASMES), Université Félix Houphouët-Boigny, Abidjan 22 BP 582, Côte d’IvoireLaboratoire des Sciences de la Matière, de l’Environnement et de l’Energie Solaire (LASMES), Université Félix Houphouët-Boigny, Abidjan 22 BP 582, Côte d’IvoireIn the District of Abidjan, flooding typically occurs suddenly during intense rainfall events. The individual rainfall event provides the basic element for the study. Its analysis is required to develop solutions for managing the impact of extreme rainfall occurrences. Our study proposes to identify individual rainfall events that occurred in the District of Abidjan from a densified network and analyze some of their characteristics related to the amount of rainfall they provided, their duration, and their level of intensity. A total of 1240 individual rainfall events were identified between 2018 and 2021 using a network of 21 rain gauges. Rainfall events were identified based on criteria such as a minimum inter-event time without rainfall of 30 min, a detection threshold of 0.02 mm/5 min, a minimum duration of 30 min applicable to the average hyetograph, and a minimum of 1 mm of rainfall in at least one rain gauge. The analysis of characteristics related to accumulation, intensity, and duration showed that the rainfall events were essentially convective, with an average duration of more than 2 h and a rainfall of 11.30 mm/event. For 70% of the rainfall events of a mixed nature, the convective episodes last up to 33.33% of the total duration of the event and produce an average of 80% of the cumulative rainfall. The 30-min peak intensities generally occur in the first half of the event. Less than 13.5% of the events have peaks greater than 50 mm/h. The probability of observing more than two, three, or four events per day is high in June and October, the core of the two rainy seasons.https://www.mdpi.com/2073-4433/14/9/1322rainfall event identificationconvective spellsrainfall intensityI30maxAbidjan |
| spellingShingle | Modeste Kacou Eric-Pascal Zahiri Kouakou Christian Yao Luc Séguis Clément Dutremble Ehouman Serge Koffi Jean-Louis Perrin Amidou Dao Angah Armel Fourier Kodji Kouamé Fréjus Konan Kouassi Tandji Tewa The Phenomenology of West African Coastal Rainfall Events Based on a New Rain Gauge Network over Abidjan (Côte d’Ivoire) Atmosphere rainfall event identification convective spells rainfall intensity I30max Abidjan |
| title | The Phenomenology of West African Coastal Rainfall Events Based on a New Rain Gauge Network over Abidjan (Côte d’Ivoire) |
| title_full | The Phenomenology of West African Coastal Rainfall Events Based on a New Rain Gauge Network over Abidjan (Côte d’Ivoire) |
| title_fullStr | The Phenomenology of West African Coastal Rainfall Events Based on a New Rain Gauge Network over Abidjan (Côte d’Ivoire) |
| title_full_unstemmed | The Phenomenology of West African Coastal Rainfall Events Based on a New Rain Gauge Network over Abidjan (Côte d’Ivoire) |
| title_short | The Phenomenology of West African Coastal Rainfall Events Based on a New Rain Gauge Network over Abidjan (Côte d’Ivoire) |
| title_sort | phenomenology of west african coastal rainfall events based on a new rain gauge network over abidjan cote d ivoire |
| topic | rainfall event identification convective spells rainfall intensity I30max Abidjan |
| url | https://www.mdpi.com/2073-4433/14/9/1322 |
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