Surveying flash floods: gauging the ungauged extremes

Borga, Marco; Gaumé, Éric; Creutin, Jean‐Dominique; Marchi, Lorenzo

doi:10.1002/hyp.7111

Cited by 199 publications

(145 citation statements)

References 9 publications

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“…Transferring parameters is often performed in the case of geographically close catchments. However, nearby catchments can present significant contrasts in terms of physiographic properties and hydrological behaviours, especially during floods or even flash floods involving rapid responses and highly nonlinear and coupled physical processes in time and space as their generating storm (Borga et al, 2008;Garambois et al, 2014).…”

Section: Context Of the Issue: Flash Floods Predictions At Ungauged Lmentioning

confidence: 99%

Parameter regionalization for a process-oriented distributed model dedicated to flash floods

Garambois

Roux

Larnier

et al. 2015

Journal of Hydrology

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OATAO is an open access repository that collects the work of Toulouse researchers and makes it freely available over the web where possible.Parameter regionalization for a process-oriented distributed model dedicated to flash floods This contribution is one of the first studies about the regionalization of parameter sets for a rainfall-runoff model process-oriented and dedicated to flash floods. MARINE model performances are tested on a large database of 117 flash floods occurred during the last two decades in the French Mediterranean region. Given the scarcity of flash flood data, the dataset used in this study represents a large sample of hydrology and landscapes from Pyrenean, Mediterranean, Cévennes-Vivarais and Provence regions. Spatial proximity and similarity approaches with several combinations of descriptors are tested. Encouraging results are obtained with two similarity approaches based on physiographic descriptors with two and three donor catchments. There is only a small decrease of performance of 10% from cal/val to regionalization for these two methods. For 13 catchments out of 16 there is at least one flood event simulated with rather good performance. This study highlights the importance of hydrological information that is available in calibration events for a gauged catchment and from donor catchment(s) for regionalization. Moreover it is found that regionalization is easier for catchments with an apparently more regular behaviour. The most sensitive parameter of MARINE model, C Z , controlling soil volume and water balance, is rather well constrained by the two similarity approaches thanks to bedrock descriptors.

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Section: Context Of the Issue: Flash Floods Predictions At Ungauged Lmentioning

confidence: 99%

Parameter regionalization for a process-oriented distributed model dedicated to flash floods

Garambois

Roux

Larnier

et al. 2015

Journal of Hydrology

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“…The resulting floods have a rapid hydrological response, characterized by ''peaky'' hydrographs (i.e., short lag time). The flow peaks are reached within a few hours, thus giving little or no advance warning to mitigate flood damage (Borga et al, 2007;Borga et al, 2008). This hydrological response leads to the occurrence of a typology of floods known as flash floods because of their rapid onset, i.e., within six hours of rainfall (Ogden et al, 2000;Delrieu et al, 2005;Marchi et al, 2010;Hapuarachchi et al, 2011;Naulin et al, 2013;Ballesteros-Canovas et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Improvement of resilience of urban areas by integrating social perception in flash-flood risk management

Pozo

Amérigo

Díez‐Herrero

et al. 2016

Journal of Hydrology

129

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Please cite this article as: Bodoque, J.M., Amerigo, M., Díez-Herrero, A., García, J.A., Cortés, B., BallesterosCánovas, J.A., Olcina, J., Improvement of resilience of urban areas by integrating social perception in flash-flood risk management, Journal of Hydrology (2016), doi: http://dx.doi.org/10. 1016/j.jhydrol.2016.02.005 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. AbstractIn urban areas prone to flash floods, characterization of social resilience is critical to guarantee the success of emergency management plans. In this study, we present the methodological approach that led to the submission and subsequent approval of the Civil Protection Plan of Navaluenga (Central Spain), in which the first phase was to analyse flood hazard by combining the Hydrological Modelling System (HEC-HMS) and the Iber 2D hydrodynamic model. We then analysed social vulnerability and designed measures to put into practice within the framework of the Civil Protection Plan. At a later phase, we assessed citizens' flash-flood risk perception and level of awareness regarding some key variables of the Civil Protection Plan. To this end, 254 adults representing roughly 12% of the population census were interviewed. Responses were analysed descriptively, comparing awareness regarding preparedness and response actions with the corresponding information 2 and behaviours previously defined in the Civil Protection Plan. In addition, we carried out a latent class cluster analysis aimed at identifying the different groups present among the interviewees. Our results showed that risk perception is low. Specifically, 60.8% of the interviewees showed low risk perception and low awareness (cluster 1);24.4% had high risk perception and low awareness (cluster 2), while the remaining 14.8% presented high long-term risk perception and high awareness (cluster 3).These findings suggest the need for integrating these key variables of social risk perception and local tailored information in emergency management plans, especially in urban areas prone to flash-floods where response times are limited.

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“…The process is characterized by its sudden occurrence combining high stream power and sediment transport rates which make it one of the most harmful natural hazards in mountain and hillslope environments (Borga et al, 2008(Borga et al, , 2014Marchi et al, in press). Recent studies suggest that climate change may have an impact on the triggering of flash floods and that the occurrence may increase at the global scale (Beniston, 2009;Giorgi et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Regional reconstruction of flash flood history in the Guadarrama range (Central System, Spain)

Rodríguez-Morata

Ballesteros‐Cánovas

Trappmann³

et al. 2016

Science of The Total Environment

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• Flash floods represent a regional natural hazard in Guadarrama range.• Dendrochronology allows fill the lack of systematic data in mountain environments.• Regional studies and quality samples allow reducing the number of collected samples.• We complement existing records with 8 events covering the last~200 years.• Forest management could limit the amount of proxy evidence of flash flood events. Flash floods are a common natural hazard in Mediterranean mountain environments and responsible for serious economic and human disasters. The study of flash flood dynamics and their triggers is a key issue; however, the retrieval of historical data is often limited in mountain regions as a result of short time series and the systematic lack of historical data. In this study, we attempt to overcome data deficiency by supplementing existing records with dendrogeomorphic techniques which were employed in seven mountain streams along the northern slopes of the Guadarrama Mountain range. Here we present results derived from the tree-ring analysis of 117 samples from 63 Pinus sylvestris L. trees injured by flash floods, to complement existing flash flood records covering the last~200 years and comment on their hydro-meteorological triggers. To understand the varying number of reconstructed flash flood events in each of the catchments, we also performed a comparative analysis of geomorphic catchment characteristics, land use evolution and forest management. Furthermore, we discuss the limitations of dendrogeomorphic techniques applied in managed forests. G R A P H I C A L A B S T R A C T a b s t r a c t a r t i c l e i n f o

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Surveying flash floods: gauging the ungauged extremes

Abstract: International audienc

Cited by 199 publications

References 9 publications

Parameter regionalization for a process-oriented distributed model dedicated to flash floods

Parameter regionalization for a process-oriented distributed model dedicated to flash floods

Improvement of resilience of urban areas by integrating social perception in flash-flood risk management

Regional reconstruction of flash flood history in the Guadarrama range (Central System, Spain)

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