226 research outputs found
Can we use indicator-based farm sustainability assessment tools for the WEFE Nexus?
No full textFair and safe allocation of natural resources for the Euro-Mediterranean area, especially for semi-arid regions, strongly relies on the adoption of WEFE (Water Energy Food Ecosystem) Nexus strategies. Transitioning to WEFE Nexus requires novel quantifiable assessment for interlinked analysis of the four WEFE sectors. Several indicator-based tools exist for agricultural sustainability at the farm scale. This contribution investigates on the application of such tools in relation for WEFE Nexus approaches. The IDEA method was selected for extending its applicability as a novel WEFE Nexus indicator toolkit and the following challenges are identified: (1) some WEFE aspects need to be reinforced in order to expand the scope beyond the actual agro-ecological focus; (2) the application at the farm scale needs to be articulated with larger scales where the WEFE Nexus displays emerging consistencies; (3) Nexus interactions, trade-offs and synergies could be further accounted for. These three challenges help identify how the IDEA indicator-based tool could be adapted to assimilate the WEFE Nexus approach, and so to allow applications in new agro-hydrological contexts.</p
Comment on 'C. Cudennec, Y. Fouad, I. Sumarjo Gatot and J. Duchesne, a geomorphological explanation of unit hydrograph concept. Hydrological processes 18 (2004) 603-6219'
No full textInternational audienceComment on 'C. Cudennec, Y. Fouad, I. Sumarjo Gatot and J. Duchesne, a geomorphological explanation of unit hydrograph concept. Hydrological processes 18 (2004) 603-6219
2 -H2U : Une fonction de transfert pluie-débit déterministe et polyvalente ; vers des applications multiples
No full textL’organisation spatiale du réseau hydrographique, ou bien du réseau de drainage en milieu urbain, est décrite par une loi physique dont la démonstration s’appuie sur des concepts de physique statistique et de fractalité. De cette loi très générale est aisément déduite une fonction de transfert de V écoulement fluvial à travers le bassin versant, de type hydrogramme unitaire. Deux paramètres liés à la forme du réseau et la vitesse moyenne d’écoulement fluvial suffisent à décrire cette fonction. Une telle fonction de transfert, déterministe et universelle, ouvre de nombreuses perspectives d’application comme l’annonce de crues rapides, l’étude d’impact ou la gestion d’ouvrages hydrauliques, la compréhension des facteurs aggravants des crues et la préconisation d’actions préventives, ainsi que la prévision de pollutogrammes et de turbidigrammes.Duchesne J., Cudennec C. 2 -H2U : Une fonction de transfert pluie-débit déterministe et polyvalente ; vers des applications multiples . In: L'école française de l'eau au service du développement mondial. Congrès de la Société Hydrotechnique de France. 25èmes journées de l'hydraulique. Chambéry, du 15 au 18 septembre 1996. Tome 2, 1998
transfR: an open-source R package for streamflow prediction in ungauged catchments
No full textInternational audienceThis R package aims to technically bring together different modelling tools for the estimation of streamflow time series of ungauged outlets. It allows implementing a spatial interpolation of streamflow of neighbouring gauged basins using a geomorphology-based deconvolution-convolution modelling approach. The robustness of the methodology has been demonstrated in several hydro-climatic contexts through several publications over the last years. However, the numerical tool itself was not easily accessible to all. The recent public availability of this package aims to facilitate an application by end-users (in particular water and basin managers, public authorities and engaged citizens). We also wish to obtain feedback and enable new bridges between science and practice as well as research on the method to explore its generality and flexibility in various contexts. The hydrological modelling itself is based on the description of the hydro-geomorphometry of the river drainage network which can be easily observed for any given outlet. An inversion of this model for the basin with a gauged outlet allows the observed streamflow to be deconvoluted and the signal of water flowing into the rivers from the slope (the net rainfall) to be estimated. Transferring this estimate of the net rainfall series to the basin of a targeted ungauged outlet thus allows the flow series to be simulated there. A spatial analysis of the hydrological distances between catchments allows the observed streamflow time series from several gauged catchments to be strategically combined to increase the robustness of the prediction. https://CRAN.R-project.org/package=transfR References: Boudhraâ H., Cudennec C., Andrieu H., Slimani M., 2018. Net rainfall estimation by the inversion of a geomorphology-based transfer function and discharge deconvolution. Hydrological Sciences Journal, 63, 2, 285-301, http://dx.doi.org/10.1080/02626667.2018.1425801 de Lavenne A., Cudennec C., 2019. Assessment of freshwater discharge into a coastal bay through multi-basin ensemble hydrological modelling. Science of the Total Environment, 669, 812-820, https://doi.org/10.1016/j.scitotenv.2019.02.387 de Lavenne A., Skøien J.O., Cudennec C., Curie F., Moatar F., 2016. Transferring measured discharge time-series: large-scale comparison of Top-kriging to geomorphology-based inverse modeling. Water Resources Research, 52, 7, 5555-5576, http://dx.doi.org/10.1002/2016WR018716. Ecrepont S., Cudennec C., Anctil F., Jaffrézic A., 2019. PUB in Québec: A robust geomorphology-based deconvolution-reconvolution framework for the spatial transposition of hydrographs. Journal of Hydrology, 570, 378-392, https://doi.org/10.1016/j.jhydrol.2018.12.05
Chronique Les droits fondamentaux dans l'Union européenne - Droits fondamentaux et délégation de compétences
No full textInternational audience(CJUE, 5 sept. 2012, n° C-355/10, RMCUE 2013. 297, chron. A. Cudennec, N. Boillet, O. Curtil, C. De Cet-Bertin, G. Guéguen-Hallouët et V. Labrot
Chronique Les droits fondamentaux dans l'Union européenne - Droits fondamentaux et délégation de compétences
No full textInternational audience(CJUE, 5 sept. 2012, n° C-355/10, RMCUE 2013. 297, chron. A. Cudennec, N. Boillet, O. Curtil, C. De Cet-Bertin, G. Guéguen-Hallouët et V. Labrot
Transferring measured discharge time series: Large-scale comparison of Top-kriging to geomorphology-based inverse modeling
No full text[Departement_IRSTEA]Eaux [TR1_IRSTEA]ARCEAUWater Resour. Res. ISI Document Delivery No.: DW5KO Times Cited: 0 Cited Reference Count: 65 de lavenne, A. Skoien, J. O. Cudennec, C. Curie, F. Moatar, F. Etablissement Public Loire; Agence de l'eau Loire Bretagne; European Regional Development Fund; "Eutrophisation-Trend "project This research was funded by Etablissement Public Loire, Agence de l'eau Loire Bretagne, European Regional Development Fund, and the "Eutrophisation-Trend "project. The discharge data used for this study are freely provided by the French Banque hydro database (www.hydro.eaufrance.fr). Amer geophysical union WashingtonInternational audienceFew methods directly transfer streamflow measurements for continuous prediction of ungauged catchments. Top-kriging has been used mainly to predict the statistical properties of runoff, but has been shown to outperform traditional regionalization approaches of rainfall-runoff models. We applied the Top-kriging approach across the Loire river basin and compared predictions to a geomorphology-based approach. Whereas Top-kriging uses spatial correlation, the other approach has the advantage of being more physically-based by using a well-known geomorphology-based hydrological model (WFIUH) and its inversion. Both approaches require an equal degree of calibration and provide similar performances. We also demonstrate that the Ghosh distance, which considers the nested nature of catchments, can be used efficiently to calculate weights and to identify the suitability of gauged catchments for use as donor catchments. This result is particularly relevant for catchments with Strahler orders above five, i.e., where donor catchments are more strongly nested. This article is protected by copyright. All rights reserved
Chronique Droit européen des transports - Desserte maritime corse - Suites judiciaires données aux deux chapitres du feuilleton : service complémentaire et service public ; privatisation de la Société nationale maritime Corse Méditerranée (SNCM)
No full textInternational audience(Trib. UE 1er mars 2017, aff. T-454/13, Société nationale maritime Corse Méditerranée [SNCM] c/ Commission européenne, ECLI:EU:T:2017:134, Rev. UE 2017. 570, chron. A. Cudennec, N. Boillet, O. Curtil, C. de Cet-Bertin, G. Guéguen-Hallouët et M. Taillens ; Trib. UE 1er mars 2017, aff. T-366/13, République française c/ Commission européenne, ECLI:EU:T:2017:135, AJDA 2017. 436 ; Rev. UE 2017. 570, chron. A. Cudennec, N. Boillet, O. Curtil, C. de Cet-Bertin, G. Guéguen-Hallouët et M. Taillens ; Trib. UE 6 juill. 2017, aff T-74/14, ECLI:EU:T:2017:471 ; Trib. UE 6 juill. 2017, aff. T-1/15, France c/ Commission et SNCM c/ Commission, ECLI:EU:T:2017:470, RTD eur. 2016. 675, obs. L. Grard
Chronique Droit du contentieux de l'Union européenne - L'intervention du Tribunal dans le contentieux du manquement : un numéro d'équilibriste
No full textInternational audienceTrib. UE 29 mars 2011, Portugal c/ Commission, T-33/09 ; Trib. UE 19 oct. 2011, France c/ Commission, T-139/06, AJDA 2011. 2339, chron. M. Aubert, E. Broussy et F. Donnat ; RMCUE 2012. 336, chron. A. Cudennec, O. Curtil,, C. De Cet-Bertin, G. Guéguen-Hallouët et V. Labro
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