Volume 26, Issue 3, June 2019, Pages 836–843
Kouassi K. Martin1, Kouassi Ernest AHOUSSI2, Kouakou Lazare Kouassi3, Yao Blaise KOFFI4, Marie-Solange Oga Yéï5, Jean Biemi6, and Soro Nagnin7
1 Earth Sciences and Mining Resource department, Félix Houphouët Boigny University, Abidjan Cocody, Côte d'Ivoire
2 Université de Cocody, Unité de Formation et de Recherche (UFR) des Sciences de la Terre et des Ressources Minières (STRM), 22 BP 582 Abidjan 22, Abidjan, Côte d'Ivoire
3 Laboratoire des Sciences et Technologies de l’Environnement, UFR Environnement, Université Jean Lorougnon Guedé, Daloa, Côte d’Ivoire
4 Université Félix Houphouët-Boigny d'Abidjan-Cocody, Unité de Formation et de Recherche des Sciences de la Terre et des Ressources Minières (UFR-STRM), Laboratoire des Sciences et Techniques de l'Eau et de l'Environnement (LSTEE), 22 Bp: 582 Abidjan 22, Côte d'Ivoire
5 Laboratoire des Sciences et Techniques de l’Eau et de l’Environnement, UFR STRM, Université Félix Houphouët-Boigny de Cocody, 22 BP 582 Abidjan 22, Côte d'Ivoire
6 Université Félix Houphouët-Boigny d'Abidjan-Cocody, Unité de Formation et de Recherche des Sciences de la Terre et des Ressources Minières (UFR-STRM), Laboratoire des Sciences et Techniques de l'Eau et de l'Environnement (LSTEE), 22 Bp: 582 Abidjan 22, Côte d'Ivoire
7 Earth Sciences and Mining Resource department, Félix Houphouët Boigny University, Abidjan Cocody, Côte d'Ivoire
Original language: English
Copyright © 2019 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Extreme flow events have had a significant impact on populations and their activities in recent decades. To reduce the impacts associated with their advent a analysis between extreme hydrological phenomena and climate variability is necessary. However, qualitative data accessing difficulties and explanatory variable definition of extremes hydrological phenomena limit extreme flows rate studies. This study proposes the analysis the variability of the floods and the low flows at the Bianouan hydrometric station. Thus, five (5) floods characteristics variables (QCX5, QXJA, F90p, F95p and F99p) and three (3) for, the low flows (VCN10, QJNA and F10p) were extracted daily flows from the Bianouan hydrometric station from 1 January1962 to 31 December 2005. The variability of these extremes has been studied by the trend analysis (linear regression) and of the stationarity (Pettitt and Hubert tests). The results show that for flood variables the negative trend is very significant and ruptures are observed in 1980. For low flow variables the negative trend is significant and the ruptures are observed in 1981. From this study, we can deduce that the ruptures observed in the rains and flows average in the end 1960s and early 1970s have affected later the extreme flows around the 1980s.
Author Keywords: extreme flow, stationarity, variability, trend.
Kouassi K. Martin1, Kouassi Ernest AHOUSSI2, Kouakou Lazare Kouassi3, Yao Blaise KOFFI4, Marie-Solange Oga Yéï5, Jean Biemi6, and Soro Nagnin7
1 Earth Sciences and Mining Resource department, Félix Houphouët Boigny University, Abidjan Cocody, Côte d'Ivoire
2 Université de Cocody, Unité de Formation et de Recherche (UFR) des Sciences de la Terre et des Ressources Minières (STRM), 22 BP 582 Abidjan 22, Abidjan, Côte d'Ivoire
3 Laboratoire des Sciences et Technologies de l’Environnement, UFR Environnement, Université Jean Lorougnon Guedé, Daloa, Côte d’Ivoire
4 Université Félix Houphouët-Boigny d'Abidjan-Cocody, Unité de Formation et de Recherche des Sciences de la Terre et des Ressources Minières (UFR-STRM), Laboratoire des Sciences et Techniques de l'Eau et de l'Environnement (LSTEE), 22 Bp: 582 Abidjan 22, Côte d'Ivoire
5 Laboratoire des Sciences et Techniques de l’Eau et de l’Environnement, UFR STRM, Université Félix Houphouët-Boigny de Cocody, 22 BP 582 Abidjan 22, Côte d'Ivoire
6 Université Félix Houphouët-Boigny d'Abidjan-Cocody, Unité de Formation et de Recherche des Sciences de la Terre et des Ressources Minières (UFR-STRM), Laboratoire des Sciences et Techniques de l'Eau et de l'Environnement (LSTEE), 22 Bp: 582 Abidjan 22, Côte d'Ivoire
7 Earth Sciences and Mining Resource department, Félix Houphouët Boigny University, Abidjan Cocody, Côte d'Ivoire
Original language: English
Copyright © 2019 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
Extreme flow events have had a significant impact on populations and their activities in recent decades. To reduce the impacts associated with their advent a analysis between extreme hydrological phenomena and climate variability is necessary. However, qualitative data accessing difficulties and explanatory variable definition of extremes hydrological phenomena limit extreme flows rate studies. This study proposes the analysis the variability of the floods and the low flows at the Bianouan hydrometric station. Thus, five (5) floods characteristics variables (QCX5, QXJA, F90p, F95p and F99p) and three (3) for, the low flows (VCN10, QJNA and F10p) were extracted daily flows from the Bianouan hydrometric station from 1 January1962 to 31 December 2005. The variability of these extremes has been studied by the trend analysis (linear regression) and of the stationarity (Pettitt and Hubert tests). The results show that for flood variables the negative trend is very significant and ruptures are observed in 1980. For low flow variables the negative trend is significant and the ruptures are observed in 1981. From this study, we can deduce that the ruptures observed in the rains and flows average in the end 1960s and early 1970s have affected later the extreme flows around the 1980s.
Author Keywords: extreme flow, stationarity, variability, trend.
How to Cite this Article
Kouassi K. Martin, Kouassi Ernest AHOUSSI, Kouakou Lazare Kouassi, Yao Blaise KOFFI, Marie-Solange Oga Yéï, Jean Biemi, and Soro Nagnin, “Extreme flow variability analysis at the Bianouan hydrometric station on the Bia River watershed (South East, Côte d'Ivoire),” International Journal of Innovation and Applied Studies, vol. 26, no. 3, pp. 836–843, June 2019.
