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MODEST Challenge

Environment and Security Modelling

The impact of human activities on the environment and security is an important social issue. CERFACS teams have developed in recent years recognized expertise in the field of natural and industrial risks through their contributions to the projects related to the monitoring of the environment and natural resources, natural and industrial sites at risk. This work was undertaken in synergy with CERFACS partners.  The main  activities are:

  • the impact of transportation modes on climate and atmospheric composition;
  • the air quality at regional and global scales;
  • the simulation of forest fire;
  • the simulation and flood forecasting;
  • the study of industrial sites and explosion risks.

The diversity of the studied risks  results in a diversity of objectives (monitoring, alerting, re-analysis, scenario …), spatio-temporal scales (from a few hundred meters to several hundred kilometers), simulation tools (CFD, hydrodynamics, front propagation, aerodynamics) and algorithms to estimate the risk (direct numerical simulation, optimization and assimilation methods, methods for quantifying uncertainties, multi-dimensional code coupling and / or multi-physics ).

The MODEST challenge integrates a strong digital component and mobilizes all CERFACS teams.  The MODEST Challenge is related to the transverse lines of research “Data Assimilation and Optimization“, “Uncertainties” and the application axis “Environment“, “Combustion“, “Aerodynamics” and “Climate“.

Objectives

The MODEST Challenge aims to develop:

  • innovative methodological tools (modeling at different scales, coupling between physical and chemical processes, code coupling and data assimilation) applied to concrete problems encountered by the CERFACS associate members;
  • applications to the decision aspiring for operational, particularly for air quality, the spread of forest fires and hydrology / hydraulics.

Projects

Started in late 2014, the MODEST Challenge enabled the initiation of works in the fields of air quality and hydrology, notably through  European projects (MACC, EoCoE) and national projects (LEFE, SCHAPI, TOSCA) .

Flood forecasting and flood

hydro

Multi-dimensionnal 1D/2D hydraulics coupling en hydraulique, with data      assimilation on the Adour.

 

 

Modeling and flood forecasting answer a major challenge: managing water resources and natural hazards. At CERFACS, data assimilation methods are implemented to improve the predictive capacity of hydraulic numerical models limited by uncertainties on knowledge of watersheds, meteorological, hydrological and geographical. The DAMP platform enables real-time forecasting of floods from a river hydraulics code. Works multi-dimensional coupling for 1D / 2D hydraulics allow to model complex flows by limiting the cost calculations in order  to meet the operational and industrial constraints.

 

 

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Wildland fire spread and emissions

front_fire

Corrections of simulated fire front (blue) by the assimilation of aribone observations (gray) to obtain an analyzed front position.

 

The improvement of real-time forecasting systems for the spread of forest fires and associated emissions paves the way for direct applications on emergency fire risk management and quality management of the regional air and climate scale. The FIREFLY platform, co-developed by CERFACS and the University of Maryland (Dept. of Fire Protection Engineering, USA) is based on a comprehensive set-data assimilation algorithm type Kalman filter, implemented on a model semi-empirical spread of fire front. This system combines parameter estimation (surface wind, humidity and plant fuel properties) and state estimation (the position of the fire front) to improve the prediction of the position of the fire front in real time.

 

 

 

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Aviation and environment

Evaluation de l'impact des émissions anthropiques

 

CERFACS assesses the impact of anthropogenic emissions that affect atmospheric chemistry and radiation balance by complex and indirect mechanisms (streaks of water vapor condensation on aerosols, soot particles responsible for the formation of cirrus clouds, emissions ‘nitrogen oxides …) that disrupt the natural cycles, including that of ozonne, which, combined with other chemical cycles, have an impact on the anthropogenic greenhouse effect

 

 

NEWS

Sparse Days Meeting 2019 at Cerfacs, Toulouse

Brigitte Yzel |  12 May 2019

The annual Sparse Days meeting will be held at CERFACS in Toulouse on 11th and 12th July 2019. Registration for the Sparse Days is free but we ask people who are coming to register as soon as possible although the deadline is June 14th. Please complete the registration form (deadline : June 14th) indicating whether you want to give a talk and whether you wish to attend the conference dinner. Although an emphasis will be on parallel aspects, any talk that has an association with sparsity is welcome.Read more


The Telemac-Mascaret User Conference 2019 will be held in Toulouse on October 15-17th

superadmin |  2 May 2019

The conference  is organized by the European Center for Advanced Research and Training for Computational Science (CERFACS), on the Météo-France campus, in the conference room CIC. The conference will start with a one-day technical workshop (October 15th 2019), followed by a two-day conference on October 16-17th. A gala dinner will take place on the 16th evening for delegates and guests. Please check  more details.Read more

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