Modelling crisis management for improved action and preparedness (CRISMA): Modelling submersion on the Charente-Maritime coast

International audienceCRISMA is a Research and Development project financed by the European Community. Its objective is to develop a simulation-based decision support system, in different domains of the natural or industrial risk (flood, snowstorm, seism, forest fires, accidental pollution, urban accidents). The application in France, coordinated by ARTELIA Eau & Environnement, is devoted to the submersion risk on the Charente-Maritime coast and based on the experience feedback of the storm Xynthia in February, 2010. In this framework, a specific work is in progress through a thesis realized in collaboration between ARTELIA and lNRIA. Its objective is to elaborate a methodology of multi-model coupling which should be effective and applicable for the CRISMA project. These models may differ in several ways, related either to the physics and/or to the numeric concepts. The developed methodology may allow to taking into account more specific areas (urban zone, bridge in charge, …), but also should be able to simplify the simulation by dimension changes of model parts (for example, a 1D model for rivers, and a 2D one for sea). The present work addresses more specifically the problem of coupling models with different spatial dimensions

Bresle Somme Authie : long term coastal submersion and flood Management Plan

In 2011, the French government commissioned the SMBS-GLP (Somme Bay –Picardie Coast joint venture development authority) to implement a flood prevention action programme along the Northern Sea coast between Le Tréport and Berck, in order to provide an overall mid- and long-term intervention strategy regarding flood risks (river floods and marine submersion). The area covered by the integrated management program is about 660 square km, more than 80 km of sea coast, 3 estuaries Bresle, Authie and Somme Bay, 56 communities are concerned by the risk and covered by the management plan. The prevention strategy developed for the area is based on a solidarity principle between coastal areas and land areas. The principle is based on the fact that the territory should face the risk with and adapted redistribution of human and urban stakes. This strategy is to be initiated now but will need tens of years to be effective. That’s why the process is temporally adapted in order to assure some security to the most impacted areas

Bresle Somme Authie : long term coastal submersion and flood Management Plan

In 2011, the French government commissioned the SMBS-GLP (Somme Bay –Picardie Coast joint venture development authority) to implement a flood prevention action programme along the Northern Sea coast between Le Tréport and Berck, in order to provide an overall mid- and long-term intervention strategy regarding flood risks (river floods and marine submersion). The area covered by the integrated management program is about 660 square km, more than 80 km of sea coast, 3 estuaries Bresle, Authie and Somme Bay, 56 communities are concerned by the risk and covered by the management plan. The prevention strategy developed for the area is based on a solidarity principle between coastal areas and land areas. The principle is based on the fact that the territory should face the risk with and adapted redistribution of human and urban stakes. This strategy is to be initiated now but will need tens of years to be effective. That’s why the process is temporally adapted in order to assure some security to the most impacted areas

Modelling crisis management for improved action and preparedness (CRISMA): Modelling submersion on the Charente-Maritime coast

International audienceCRISMA is a Research and Development project financed by the European Community. Its objective is to develop a simulation-based decision support system, in different domains of the natural or industrial risk (flood, snowstorm, seism, forest fires, accidental pollution, urban accidents). The application in France, coordinated by ARTELIA Eau & Environnement, is devoted to the submersion risk on the Charente-Maritime coast and based on the experience feedback of the storm Xynthia in February, 2010. In this framework, a specific work is in progress through a thesis realized in collaboration between ARTELIA and lNRIA. Its objective is to elaborate a methodology of multi-model coupling which should be effective and applicable for the CRISMA project. These models may differ in several ways, related either to the physics and/or to the numeric concepts. The developed methodology may allow to taking into account more specific areas (urban zone, bridge in charge, …), but also should be able to simplify the simulation by dimension changes of model parts (for example, a 1D model for rivers, and a 2D one for sea). The present work addresses more specifically the problem of coupling models with different spatial dimensions

First real-time monitoring system of fresh-water phytoplanctonic microorganisms: the PROLIPHYC system - Application to Grangent reservoir on the Loire river (France) - Le premier système de surveillance en temps réel des micro-organismes phytoplanctoniques en eaux douces : le système PROLIPHYC - Application à la retenue de Grangent sur la Loire (France)

International audienceIn the current context of the quality degradation of continental aquatic ecosystems, the PROLIPHYC system, as presented here, had the aim of developing, validating and industrializing a real time monitoring and warning system for the management of the risks linked to the proliferation of phytoplankton, including cyanobacteria, in water bodies and slow-flowing rivers. The development of the PROLIPHYC buoy was a big technological challenge. The buoys carried a basket fitted with sensors for measuring physical, chemical and biological parameters at various depths. Data can be received and processed in real time. Moreover, buoys are equipped with a unique anti-fouling system. Initially, a " Small Lake " (SM) buoy, resulting from a prototype, was developed. It is well adapted to shallow environment, like Lake Enghien-les-Bains where it has been tested. In a second time, a " Large Lake " (LL) buoy was developed, specially designed for aquatic system presented important waves. After the presentation of the buoy development, the paper gives the example of the work made with the LL one on the Grangent reservoir. This large lake formed by a dam on the river Loire is characterized by the summer proliferation of the cyanobacteria Microcystis aeruginosa. In particular, raw and modelized data for biomass and temperature are presented, and their possible use in predictive modeling for the feeding of the warning system. Finally, the work presented here, shows that the PROLIPHYC system, that combines buoys, sensors, an informatic system for acquisition, processing, validation, and warning can represent a decision-aid system for managers of water bodies who are faced to the problem of phytoplanktonic proliferations

First real-time monitoring system of fresh-water phytoplanctonic microorganisms: the PROLIPHYC system - Application to Grangent reservoir on the Loire river (France) - Le premier système de surveillance en temps réel des micro-organismes phytoplanctoniques en eaux douces : le système PROLIPHYC - Application à la retenue de Grangent sur la Loire (France)

International audienceIn the current context of the quality degradation of continental aquatic ecosystems, the PROLIPHYC system, as presented here, had the aim of developing, validating and industrializing a real time monitoring and warning system for the management of the risks linked to the proliferation of phytoplankton, including cyanobacteria, in water bodies and slow-flowing rivers. The development of the PROLIPHYC buoy was a big technological challenge. The buoys carried a basket fitted with sensors for measuring physical, chemical and biological parameters at various depths. Data can be received and processed in real time. Moreover, buoys are equipped with a unique anti-fouling system. Initially, a " Small Lake " (SM) buoy, resulting from a prototype, was developed. It is well adapted to shallow environment, like Lake Enghien-les-Bains where it has been tested. In a second time, a " Large Lake " (LL) buoy was developed, specially designed for aquatic system presented important waves. After the presentation of the buoy development, the paper gives the example of the work made with the LL one on the Grangent reservoir. This large lake formed by a dam on the river Loire is characterized by the summer proliferation of the cyanobacteria Microcystis aeruginosa. In particular, raw and modelized data for biomass and temperature are presented, and their possible use in predictive modeling for the feeding of the warning system. Finally, the work presented here, shows that the PROLIPHYC system, that combines buoys, sensors, an informatic system for acquisition, processing, validation, and warning can represent a decision-aid system for managers of water bodies who are faced to the problem of phytoplanktonic proliferations