Evaluation of the Drivers Responsible for Flooding in Africa

Tramblay, Yves; Villarini, Gabriele; Khalki, El Mahdi El; Gründemann, Gaby; Hughes, Denis A.

doi:10.1029/2021wr029595

Cited by 35 publications

(40 citation statements)

References 95 publications

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“…Tramblay et al. (2021) reported that wet antecedent conditions prior to extreme precipitation are less relevant to flood generation than multiday precipitation events. Consistently, our results show multiday precipitation is the prominent mechanism compared to compound extremes in driving high flows.…”

Section: Resultsmentioning

confidence: 99%

“…The figure shows the mean values of the 39 catchments examined in this study. Hettiarachchi et al, 2019;Tramblay et al, 2021). Therefore, in small catchments across the west coast and southern India, extreme precipitation events alone have the potential to cause flooding.…”

Section: Summary and Discussionmentioning

confidence: 99%

“…Hence, the prominence of multiday precipitation in driving high-flows imply the significance of concurrence of wet antecedent soil moisture conditions and heavy precipitation. Tramblay et al (2021) reported that wet antecedent conditions prior to extreme precipitation are less relevant to flood generation than multiday precipitation events. Consistently, our results show multiday precipitation is the prominent mechanism compared to compound extremes in driving high flows.…”

Section: The Role Of Multiday Precipitation In Floodsmentioning

confidence: 99%

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Multiday Precipitation Is a Prominent Driver of Floods in Indian River Basins

Nanditha

Mishra

2022

Water Resources Research

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Flood is a complex phenomenon that results from a combination of factors associated with land and atmospheric conditions. For instance, floods in a river basin are driven by the combined role of the meteorological, catchment, and river system characteristics (Andrés-Doménech et al., 2015;Bertola et al., 2019;Johnson et al., 2016). However, heavy precipitation is mainly associated with flood generation in Indian river basins (Ali et al., 2019). The projected rise in the water holding capacity of the atmosphere, as explained by the Clausius Clapeyron relationship in response to global warming, can result in increased extreme precipitation leading to floods (

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Section: Resultsmentioning

confidence: 99%

Section: Summary and Discussionmentioning

confidence: 99%

Section: The Role Of Multiday Precipitation In Floodsmentioning

confidence: 99%

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Multiday Precipitation Is a Prominent Driver of Floods in Indian River Basins

Nanditha

Mishra

2022

Water Resources Research

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“…CHIRPS precipitation estimates have been validated across different regions in Africa (Dinku et al 2018;Satgé et al 2020). It has also been used in several studies in Africa, e.g., (1) to analyse long-term trends in precipitation (Muthoni et al 2019;Alemu & Bawoke 2020), (2) for hydrological modelling (Dembélé et al 2020;Larbi et al 2020), (3) for flood studies (Elagib et al 2021), and (4) to evaluate the drivers of flood events (Tramblay et al 2021). CHIRPS data were downloaded free of charge from https://climateserv.servirglobal.net.…”

Section: Chirps Precipitationmentioning

confidence: 99%

Water security assessment in ungauged regions using the water balance and water footprint concepts and satellite observations

Nkiaka

2022

Hydrology Research

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Water security assessments often rely on outputs from hydrological models that are applicable only in gauged regions where there are river discharge data to constrain the models. Therefore, there is an urgent need to explore new methods for assessing water security in ungauged regions. This study proposes the use of the water balance and water footprint concepts and satellite observations to assess water security in Anglophone Cameroon, which is an example of a typically ungauged region. Specifically, the study assesses demand-driven water scarcity in terms of blue and green water scarcities and population-driven water scarcity quantified using the Falkenmark index across all districts in Anglophone Cameroon. The study also performs a spatiotemporal trend analysis of precipitation and temperature in the study area using the Mann–Kendall test. Precipitation trend analysis returns varying strengths and magnitudes for different districts unlike temperature which demonstrates an upward trend in all districts. The water security assessment shows that blue water scarcity is substantially low across most districts, whereas population-driven water scarcity is observed in densely populated districts (<1,700 m3/capita/year). The results from this study suggest that the proposed method may be used to assess water security in ungauged regions irrespective of climate or population size.

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“…One way of exploring the relative importance of these drivers is by analyzing flood seasonality, defined as the day of the year that floods occur. A coincidence in the timing of floods and their drivers can be used as a proxy for the causality of flood generation (Parajka et al., 2010; Sivapalan et al., 2005; Tramblay et al., 2021).…”

Section: Introductionmentioning

confidence: 99%