The Impact of Climate Change on Water Resource Availability in a Trans-Boundary Basin in West Africa: The Case of Sassandra

Coulibaly, Naga; Coulibaly, Talnan Jean Honoré; Mpakama, Ziyanda; Savané, Issiaka

doi:10.3390/hydrology5010012

Cited by 34 publications

(24 citation statements)

References 23 publications

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“…In the other two species, a decline of mites was likewise observed, although not tested due to the small sample size. Thus the decrease in mites’ infestation over time potentially is mirroring the decrease in rainfall in that area (Coulibaly, Coulibaly, Mpakama, & Savané, ).…”

Section: Discussionmentioning

confidence: 99%

Prevalence of endoparasitic mites on four West African leaf‐litter frogs depends on habitat humidity

et al. 2019

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Amphibian species are known to carry endoparasitic mites. The infestation probability, prevalence, and intensity of mites vary among species and habitats. Mites of the genus Endotrombicula are known to infest African and Malagasy frogs. However, the factors leading to an increase in the probability of mite infestation are unknown. To test for inter‐ and intraspecific differences in infestation probability and its potential correlation with sex, age, habitat preferences, and/or season within a species‐rich West African leaf‐litter frog assemblage, we examined more than 6,800 individual frogs for the presence of mites throughout two independent time increments, 1999–2000 and 2016–2017. We found only members of the leaf‐litter frog genus Phyrnobatrachus to be infested, while other syntopically occurring genera were not affected. Within Phrynobatrachus, only four out of eight species were infested. Mites prevalence differed between species (highest P. phyllophilus, followed by P. alleni), sex (males higher than females in P. alleni and P. phyllophilus), and age (adults higher than juveniles in P. alleni), as well as season (more mites during wet than dry season in P. phyllophilus). The prevalence of mite infestation did not influence mate choice in P. alleni. Increased humidity showed a clear positive effect on infestation prevalence. We also detected a marked decrease in the prevalence of mites from 1999–2000 to 2016–2017, a period during which climatological changes within the study area have been reported with a tendency toward drier conditions. The decrease in mite infestation prevalence over time might be a signal of increasingly drier conditions.

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Section: Discussionmentioning

confidence: 99%

Prevalence of endoparasitic mites on four West African leaf‐litter frogs depends on habitat humidity

et al. 2019

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“…The alternative hypothesis is H A : a change point exists in the time series. The non-parametric statistics used by Pettitt are defined in Equation (3). The change point is detected at K T , provided that the statistics are significant.…”

Section: Trend Test and Detection Of Change Pointmentioning

confidence: 99%

“…A trans-boundary river crosses at least one national border, either within a nation or internationally. There are about 286 trans-boundary river basins in 151 countries of more than 2.8 billion people; there are also around 22,000 km 3 of river discharge each year in these areas [1]. Water resources planning and management in trans-boundary river basins are generally likely to be more complex due to the different institutional, social, scientific, and political contexts involved.…”

Section: Introductionmentioning

confidence: 99%

“…Cooley and Gleick [2] suggested that the integration of information on future hydro-climatological conditions into complex political systems of trans-boundary river basin management can play an important role in agreements on water. Coulibaly et al [3] evaluated the impact of climate change on water resources in the trans-boundary river basin in West Africa and showed a reduction in future annual discharge.…”

Section: Introductionmentioning

confidence: 99%

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Analysis of Dam Inflow Variation Using the Hydrological Sensitivity Method in a Trans-Boundary River Basin: Case Study in the Korean Peninsula

Kim

2019

Water

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Water resource planning in a trans-boundary river basin is complex because of different institutional and scientific concerns and it may become increasingly difficult as a consequence of water scarcity caused by climate change. The analysis of discharge variations in a trans-boundary river basin is very important because the results can be key to resolve complex problems including decreased hydropower generation, degraded water quality, and deficient water supplies. Despite its importance, there are relatively few studies dealing with hydrological variation in a trans-boundary river basin. Therefore, this study used the hydrological sensitivity method to identify the discharge variation in the Hwacheon dam upper basin, a representative trans-boundary river basin between South Korea and North Korea. This particular basin was selected because the inflow into the Hwacheon dam in South Korea has decreased significantly after the construction of the Imnam dam in North Korea in 2000. The hydrological sensitivity method is a simple approach to analyze variations in discharge. After collecting 51 years (1967–2017) of rainfall and inflow data, a change point that represents an abrupt change in the time series was detected by using moving average, double-mass curve analysis, Pettitt’s test, and Bayesian change-point analysis. The change point detected by these methods was 1999. The hydrological sensitivity method using five Budyko-based functions was applied to a time series divided into before and after the detected change point. The average decrease after 1999 was 464.91 mm/y (or 1899 × 106 m3/y). Also, the maximum and minimum decreases after 1999 were 515.24 mm/y (or 2105 × 106 m3/y) and 435.32 mm/y (or 1778 × 106 m3/y), respectively. Because of the increase in rainfall and the decrease in inflow since 2000, the values determined in this study are slightly larger than those from conventional studies. Finally, it is suggested that the results from this study can be used effectively to establish reasonable water resource planning in the trans-boundary river basin between South Korea and North Korea.

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“…To this end, the link between climate, water, and energy has become a key subject of research globally, referred to as climate-water-energy nexus. In West Africa, many studies have been done to evaluate the impacts of climate change on future water availability [23][24][25][26][27]. While some studies present severe decrease of water available [26,28], others suggest less severe decrease [29], some other are uncertain about future water availability [30], and some even predict an increase [23,25].…”

Section: Introductionmentioning

confidence: 99%

Sustainable Hydroelectric Dam Management in the Context of Climate Change: Case of the Taabo Dam in Côte D’Ivoire, West Africa

et al. 2019

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Management of hydroelectric dams is an aspect of sustainability that comes with resolving problems locally. The use of global indicators has not been a sustainable solution, thus the need for local indicators. Besides, current sustainability assessment tools lack the integration of climate, making assessments in a climate change context impossible. In this paper, we present management and sustainability assessment in a climate change context using sustainability indicators. We modeled a change in the climate using normal, moderate, and extreme climate conditions defined by Standardized Precipitation Indices (SPI) values. Out of 36 years analyzed, 24 years fall in the near-normal climate regime, and the remaining 12 years in moderate and extreme conditions, making near-normal climate regime the basis for managing the Taabo Dam. The impact of climate, techno-economic, and socio-environmental indicators on sustainability were investigated, and the results were analyzed according to scenarios. Climate adaptation shows higher sustainability indices than techno-economic and socio-environmental scenarios. Probability matrices show high and low values, respectively, for environmental and flooding indicators. Risk matrices, on the other hand, show that even with small probability values, risks still exist, and such small probabilities should not be taken as an absence of risk. The study reveals that sustainability can be improved by integrating climate into existing assessment methods.

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The Impact of Climate Change on Water Resource Availability in a Trans-Boundary Basin in West Africa: The Case of Sassandra

Cited by 34 publications

References 23 publications

Prevalence of endoparasitic mites on four West African leaf‐litter frogs depends on habitat humidity

Prevalence of endoparasitic mites on four West African leaf‐litter frogs depends on habitat humidity

Analysis of Dam Inflow Variation Using the Hydrological Sensitivity Method in a Trans-Boundary River Basin: Case Study in the Korean Peninsula

Sustainable Hydroelectric Dam Management in the Context of Climate Change: Case of the Taabo Dam in Côte D’Ivoire, West Africa

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