Analyse de la variabilité climatique et de ses influences sur les régimes pluviométriques saisonniers en Afrique de l’Ouest : cas du bassin versant du N’zi (Bandama) en Côte d’Ivoire

Kouassi, Amani Michel; Kouamé, Koffi Fernand; Koffi, Yao Blaise; Dje, Kouakou Bernard; Paturel, Jean Emmanuel; Oularé, Sékouba

doi:10.4000/cybergeo.23388

Cited by 46 publications

(34 citation statements)

References 7 publications

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“…Based on this assumption, the evolution of these two types of days were computed and presented on a same graph over 5-day periods. The dry period is defined when the curve of the percentage of dry days belonging to a dry event of at least seven days is above the curve of the percentage of wet days, and vice versa [42].…”

Section: Seasonal Patterns Of Precipitation and Runoff Seriesmentioning

confidence: 99%

Water Supply Basins of São Paulo Metropolitan Region: Hydro-Climatic Characteristics of the 2013–2015 Water Crisis

Milano

Reynard

Miranda

et al. 2018

Water

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São Paulo metropolitan region experienced an acute water crisis between 2013 and 2015. According to the Brazilian and international press, it was due to climatic, anthropogenic, and water management factors. This paper assesses the hydro-climatic characteristics of the crisis by focusing on the Alto-Tietê basin and the headwater of the Piracicaba-Capivari-Jundiaí (PCJ) basin that supply 70% of the water consumed in the metropolis. Based on 16 rain-gauge stations, 5 runoff-gauge stations, and several statistical analyses carried over the 1951-2015 period, this assessment shows that the 2013-2015 hydro-climatic crisis resulted from a large number of days without rain in the north of the Alto-Tietê basin and to less intense precipitation events in the headwaters of the PCJ basin during the austral spring 2013 and the year 2014. It also defines a return period of 98 years for observed river flows in 2014. Despite the rare nature of this hydrological drought, the need for efficient water saving policies is brought forward.

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Section: Seasonal Patterns Of Precipitation and Runoff Seriesmentioning

confidence: 99%

Water Supply Basins of São Paulo Metropolitan Region: Hydro-Climatic Characteristics of the 2013–2015 Water Crisis

Milano

Reynard

Miranda

et al. 2018

Water

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“…In this country, the impacts of climate change have led to recurrent droughts, changes in rain amount distribution, reduction of arable land, coastal erosion, and flooding [12]. Many studies on the impacts of climate variability were carried out in Côte d'Ivoire [13][14][15][16][17][18]. Few studies have been conducted to investigate the impact of climate change on the water resources in the Bandama basin, despite the increase in water requirements for water supply of populations, agriculture, livestock, mining, and hydroelectric dams.…”

Section: Introductionmentioning

confidence: 99%

Climate Change and Its Impacts on Water Resources in the Bandama Basin, Côte D’ivoire

et al. 2017

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Abstract:This study aims to assess future trends in monthly rainfall and temperature and its impacts on surface and groundwater resources in the Bandama basin. The Bandama river is one of the four major rivers of Côte d'Ivoire. Historical data from 14 meteorological and three hydrological stations were used. Simulation results for future climate from HadGEM2-ES model under representative concentration pathway (RCP) 4.5 and RCP 8.5 scenarios indicate that the annual temperature may increase from 1.2 • C to 3 • C. These increases will be greater in the north than in the south of the basin. The monthly rainfall may decrease from December to April in the future. During this period, it is projected to decrease by 3% to 42% at all horizons under RCP 4.5 and by 5% to 47% under RCP 8.5. These variations will have cause an increase in surface and groundwater resources during the three periods (2006-2035; 2041-2060; 2066-2085) under the RCP 4.5 scenario. On the other side, these water resources may decrease for all horizons under RCP 8.5 in the Bandama basin.

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“…Les différentes tendances observées témoignent d'une baisse générale de la pluviométrie dans la zone cotonnière étudiée avec des particularités locales au niveau de certains DIS. Ces résultats sont similaires à ceux obtenus par Kouassi et al (2010) dans le bassin-versant du N'zi (Bandama) en Côte d'Ivoire et par Noufé et al (2015) dans l'Est ivoirien. Aussi Bambara et al (2016) ont-ils abouti aux mêmes résultats au Burkina Faso.…”

Section: Discussionunclassified

“…Noufé et al (2015) indiquent des débuts de saison des pluies de plus en plus tardifs et des fins de saison pluvieuse de plus en plus précoces dans l'Est du pays après la rupture de 1970. Kouassi et al (2010) font remarquer la baisse de la pluviométrie et des jours de pluie dans le bassin-versant du N'zi-Bandama. Les travaux d'Adewi et al, (2010) et de Bambara et al, (2016) respectivement au Togo et au Burkina Faso ont abouti au même constat.…”

Section: Discussionunclassified

Variabilité des descripteurs pluviométriques intrasaisonniers à impact agricole dans le bassin cotonnier de Côte d’Ivoire : cas des zones de Boundiali, Korhogo et Ouangolodougou

Dekoula¹,

Kouamé²,

Ngoran³

et al. 2019

J. App. Bioscience.

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Dekoula et al., J. Appl. Biosci. 2018 Variabilité des descripteurs pluviométriques intrasaisonniers à impact agricole dans le bassin cotonnier de Côte d'Ivoire : zones de Boundiali, Korhogo et Ouangolo ABSTRACTObjective: This study aims to characterize the evolution of agricultural impact intra-seasonal descriptors during the growing season in cotton production area of Côte d'Ivoire. For this purpose, Methodology and results: ten intraseasonal descriptors likely to influence agriculture were determined from rainfall data covering the periods 1951-2000 and 2011-2016 from the Airport, Aeronautical and Meteorological Development and Operations Company and the National Agronomic Research Center. Trend (Mann-Kendall) and stationarity (Pettitt) tests and an inter-period comparison were applied to the identified variables. Analysis of seasonal rainfall accumulations, number of rainy days and average daily rainfall amounts showed a significant downward trend over the period 1951-2000. The cessation and length of the rainy season showed a significant trend towards early onset and shortening respectively. Other intraseasonal descriptors do not varied significantly. In contrast, statistically significant breaks were observed between 1968 and 1979. The period comparison indicated a deterioration in conditions during the dry period . The comparison of the periods indicates a deterioration of the climatic conditions during the dry period . These degradations have increased in the current period (2011)(2012)(2013)(2014)(2015)(2016). Conclusion and application: New climatic conditions observed in the cotton production area translated by a variability of intraseasonal descriptors are making agricultural planning increasingly difficult. It is therefore necessary to update the crop calendars in the cotton production area.

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Analyse de la variabilité climatique et de ses influences sur les régimes pluviométriques saisonniers en Afrique de l’Ouest : cas du bassin versant du N’zi (Bandama) en Côte d’Ivoire

Cited by 46 publications

References 7 publications

Water Supply Basins of São Paulo Metropolitan Region: Hydro-Climatic Characteristics of the 2013–2015 Water Crisis

Water Supply Basins of São Paulo Metropolitan Region: Hydro-Climatic Characteristics of the 2013–2015 Water Crisis

Climate Change and Its Impacts on Water Resources in the Bandama Basin, Côte D’ivoire

Variabilité des descripteurs pluviométriques intrasaisonniers à impact agricole dans le bassin cotonnier de Côte d’Ivoire : cas des zones de Boundiali, Korhogo et Ouangolodougou

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