Benefit of coupling the ISBA land surface model with a TOPMODEL hydrological model version dedicated to Mediterranean flash-floods

Vincendon, Béatrice; Ducrocq, Véronique; Saulnier, Georges-Marie; Bouilloud, Ludovic; Chancibault, Katia; Habets, Florence; Noilhan, J.

doi:10.1016/j.jhydrol.2010.04.012

Cited by 58 publications

(41 citation statements)

References 36 publications

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“…In the present study, the soil saturation is systematically initialized from a continuous water balance model for each catchment as performed by Roux et al (2011), Tramblay et al (2010), Vincendon et al (2010). Using a process-oriented model such as MARINE model on a mesh at a few hundred meters resolution, i.e.…”

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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“…Numerous adapted hydrologic models were proposed, but there is not, at the moment, a clear consensus as to a preferential approach (Hapuarachchi et al, 2011). TOPMODEL and its derivatives Vincendon et al, 2010), or else the models based on the SCS Published by Copernicus Publications on behalf of the European Geosciences Union.…”

Section: Introductionmentioning

confidence: 99%

A coupling of hydrologic and hydraulic models appropriate for the fast floods of the Gardon River basin (France)

Laganier¹,

Ayral²,

Salze³

et al. 2014

Nat. Hazards Earth Syst. Sci.

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Abstract. Mediterranean catchments are regularly affected by fast and flash floods. Numerous hydrologic models have been developed, and allow modelling of these floods. However, these approaches often concern average-size basins of a few hundred km 2 . At larger scales (> 1000 km 2 ), coupling of hydrologic and hydraulic models appears to be an adapted solution. This study has as its first objective the evaluation of the performances of a coupling of models for flood hydrograph modelling. Secondly, the coupling results are compared with those of other modelling options. The aim of these comparisons is to clear up the following points. (1) Is a simplified routing model (lag and route) as efficient as a full hydraulic model for the modelling of hydrographs, in the intermediary downstream part of the stream? (2) Is adding lateral inflows necessary for all studied events? (3) What is the impact of the qualities of upstream hydrologic modelling feeding the coupling? The coupling combines the SCS-LR (Soil Conservation Service-lag-and-route) hydrologic model of the ATHYS platform and the MASCARET 1-D hydraulic model based on full Saint-Venant equations. It is applied to the Gardon River basin (2040 km 2 ) in the south of France. For the seven studied events, the results of the coupling are satisfactory, the calculated Nash indexes varying between 0.61 and 0.97. The comparisons with the other modelling options show the important role of the spatial distribution of rains during events: when rains are centered on the intermediary downstream part of the catchment, adding lateral inflows is necessary; when rains are more important in the upstream part, the quality of the hydrologic modelling upstream of the coupling has a strong impact. Furthermore, the used coupling of models seems well adapted for water rising and flooded area forecasting. The future developments of the tool will concentrate on this point.

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“…Despite a better prediction of these precursors, the forecast of the precise location of the anchoring region of the precipitating system, especially in case of extreme event, is nowadays still a challenging issue. Furthermore, a better knowledge of the forecast uncertainty is really crucial as the hydrological response of the typical small and steep Mediterranean watersheds is very sensitive to the location of the heaviest precipitation (Chancibault et al, 2006;Vincendon et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Uncertainty of lateral boundary conditions in a convection-permitting ensemble: a strategy of selection for Mediterranean heavy precipitation events

Nuissier

Joly

Vié

et al. 2012

Nat. Hazards Earth Syst. Sci.

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Abstract. This study examines the impact of lateral boundary conditions (LBCs) in convection-permitting (C-P) ensemble simulations with the AROME model driven by the ARPEGE EPS (PEARP). Particular attention is paid to two torrential rainfall episodes, observed on 15-16 June 2010 (the Var case) and 7-8 September 2010 (the Gard-Ardèche case) over the southeastern part of France. Regarding the substantial computing time for convection-permitting models, a methodology of selection of a few LBCs, dedicated for C-P ensemble simulations of heavy precipitation events is evaluated. Several sensitivity experiments are carried out to evaluate the skill of the AROME ensembles, using different approaches for selection of the driving PEARP members. The convective-scale predictability of the Var case is very low and it is driven primarily by a surface low over the Gulf of Lyon inducing a strong convergent low-level flow, and accordingly advecting strong moisture supply from the Mediterranean Sea toward the flooded area. The Gard-Ardèche case is better handled in ensemble simulations as a surface cold front moved slowly eastwards while increasing the low-level water vapour ahead is well reproduced. The selection based on a cluster analysis of the PEARP members generally better performs against a random selection. The consideration of relevant meteorological parameters for the convective events of interest (i.e. geopotential height at 500 hPa and horizontal moisture flux at 925 hPa) refined the cluster analysis. It also helps in better capturing the forecast uncertainty variability which is spatially more localized at the "high-impact region" due to the selection of more mesoscale parameters.

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Benefit of coupling the ISBA land surface model with a TOPMODEL hydrological model version dedicated to Mediterranean flash-floods

Cited by 58 publications

References 36 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

A coupling of hydrologic and hydraulic models appropriate for the fast floods of the Gardon River basin (France)

Uncertainty of lateral boundary conditions in a convection-permitting ensemble: a strategy of selection for Mediterranean heavy precipitation events

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