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Margny-lès-Compiègne, France

Bardet L.,Institute for Radiological Protection and Nuclear Safety | Duluc C.M.,Institute for Radiological Protection and Nuclear Safety | Rebour V.,Institute for Radiological Protection and Nuclear Safety | L'Her J.,Center dEtudes Techniques Maritimes et Fluviales
Natural Hazards and Earth System Science | Year: 2011

A good knowledge of extreme storm surges is necessary to ensure protection against flood. In this paper we introduce a methodology to determine time series of skew surges in France as well as a statistical approach for estimating extreme storm surges. With the aim to cope with the outlier issue in surge series, a regional frequency analysis has been carried out for the surges along the Atlantic coast and the Channel coast. This methodology is not the current approach used to estimate extreme surges in France. First results showed that the extreme events identified as outliers in at-site analyses do not appear to be outliers any more in the regional empirical distribution. Indeed the regional distribution presents a curve to the top with these extreme events that a mixed exponential distribution seems to recreate. Thus, the regional approach appears to be more reliable for some sites than at-site analyses. A fast comparison at a given site showed surge estimates with the regional approach and a mixed exponential distribution are higher than surge estimates with an at-site fitting. In the case of Brest, the 1000-yr return surge is 167 cm in height with the regional approach instead of 126 cm with an at-site analysis. © 2011 Author(s).


Smaoui H.,Center dEtudes Techniques Maritimes et Fluviales | Smaoui H.,CNRS Roberval Laboratory (Mechanical Research Unit) | Ouahsine A.,CNRS Roberval Laboratory (Mechanical Research Unit)
Environmental Fluid Mechanics | Year: 2012

A proper estimation of the skin shear stress τ s is necessary for a proper evaluation of sediment flux at the sediment-fluid interface. Several empirical formulas of the skin shear stress have been proposed in the literature for rippled bed as function of the factor form η/λ (η and λ are respectively the height and wavelength of the bedform). These formulas express that in the presence of bedform, τ s is a partition of the total shear stress τ b. In contrast, when the bottom is flat, τ s is exactly equal to τ b. Based on in situ measurements, Li (J Geophys Res 99:791-799, 1994) has proposed a new formula of τ s depending on u */η (u * is the friction velocity, but not as a function of η/λ. This formulation appears physically more realistic, but does not cover the flat bottom range. The purpose of this short note is therefore the extension of the Li's expression to this type of bottom. © 2011 Springer Science+Business Media B.V.


Debaillon P.,Center dEtudes Techniques Maritimes et Fluviales
Journal of Ship Research | Year: 2010

As empirical formulas do not succeed in predicting the ship squat with sufficient reliability, a numerical modeling system was developed. It is based on a three-model coupling to reproduce the physics of the phenomenon. The numerical modeling system was also used to set up a new formula. Finally, a comparison between measurements, empirical formulas, and the numerical modeling is made for three examples.


Grant
Agency: Cordis | Branch: FP7 | Program: CSA-SA | Phase: SST.2013.6-1. | Award Amount: 2.05M | Year: 2013

Maritime Europe Strategy Action (MESA FOSTER WATERBORNE), main strategic objective (in line with WATERBORNE-TP) is to strengthen the effectiveness of the research and innovation capacities of the European maritime industry, by: - Optimization of the European maritime RDI strategies - Improvement of the stakeholders network, of the dissemination, of the use of the research results, and increasing the visibility of the R&I findings - Fostering the definition of the maritime R&I transport policies MESA, is (1) providing support to the WATERBORNE TP work, enlarging and maintaining it, (2) identifying 4 major themes (implemented via Thematic Technology Groups on Energy Efficiency, Safety, Production, E-Maritime) performing an in-depth analysis and assessment of the achievements at EU and National level, to foster future strategic lines in research and innovation, (3) updating the strategic research agenda and creating an innovation agenda contributing to close the gaps between research and market uptake, (4) enhancing a network for the exchange of ideas and priorities, (5) acting as major player for dissemination raising waterborne value chain profile and visibility in Europe. Foresight activity will provide market, societal and regulatory trends studies, contributing to transport RDI policies. A Integration Group will issue Strategic documents for the waterborne sector: VISIONS2030, Strategic Research Agenda, Innovation Agenda, Implementation Plan, homogenizing findings of the Thematic Technology Groups and the Foresight. A comprehensive communication strategy will be implemented including coverage of the TRA2014, 2016, Technology Workshops, Major Conferences, Newsletter, Brokerage Events, Show Cases of successful projects, TRIP liaison, etc. MESA involves 28 partners, (industrial, research, education, associations) ensuring the widest possible participation accustomed to work together since many years, in the majority of EU projects and in the WATERBORNE-TP.


Grant
Agency: Cordis | Branch: FP7 | Program: CSA-SA | Phase: TPT-2007-0.0-06 | Award Amount: 1.10M | Year: 2008

AIMS applies an innovative approach to develop a methodology to assess and evaluate research projects related to freight transport supported in FP5 and FP6. Freight transport is a key element for the economy, raising various environmental, social, security or safety issues that are severely increasing, also in the future. Innovation is a key bridging both streams. High investments in freight transport RTD are made, however, various RTD projects have never passed the commercialisation threshold. AIMS aims to minimize the risks of public or private investments in freight transport RTD. AIMS will identify critical factors of RTD projects through success and failure analysis of previous FP5 and FP6 projects. Based on results coming from the analysis of the past, present and future (notably as seen by Technological Platforms and Advisory councils), AIMS will assess the positive or negative impacts of European research FP and projects in particular in the economic, social and environmental fields. A specific care will be given to depict changes operated by the different Member States and catalysed by EU research programs. Guidelines for current and future FP7 projects will then be produced and recommendations for the definition of new research policy objectives provided. This will be carried out by a Researcher group under the direction of a Secretariat and the caution of an Experts group, in direct interaction with End-Users, Industries and Technology Platform & Advisory Council of each mode including intermodal gathered among dedicated groups. Two workshops and one final conference will be organised integrating the different groups to confront results obtained to really concerned actors. A dedicated internet platform will be set up to ensure pro-active communication. A handbook will be set up including consolidated guidelines to policy makers, industry and the research community. AIMS contribute to generate new knowledge on transport RTD and relevant social, environmental and economic issues, establish a better dialogue between policy, industry and research, ensure consistency between their approaches, and strengthen their competitiveness and innovation efforts toward a sustainable transport system.

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