International audience

International audience

International audience | The European Water Framework Directive requires the monitoring of priority pollutants entering surface waters. This includes notably stormwater network. In this study, the contribution of discharges from washes stations to pollution of stormwater network was investigated. Six washes stations discharging wastewater into the stormwater network were selected: (i) one trucks wash station, (ii) two self-service stations for cars and motorcycles, (iii) two bus wash stations, (iv) one subway wash station. Classical parameters (conductivity, pH, turbidity, chemical oxygen demand, total nitrogen, total phosphorus, suspended solid) and organic pollutants (Polycyclic Aromatic Hydrocarbons, Total Hydrocarbons and Methylterbutylether) were2 checked and measured. Concentrations were compared with limit values from Greater Toulouse decontamination service regulations for the discharge licenses of carwashes, and under article 32 of the French decree for discharges into the natural environment (Decree February 2nd 29 , 1998) and with the proposal directive from the European Parliament and the Council, dealing with environmental quality standards (European Commission, 2006). The result showed a decrease of pollution downstream of the pre- treatments for subway washes stations but not for bus washes stations. According to the directives, the pre- treatment processes were not sufficient to justify a discharge into the stormwater network.

The European Water Framework Directive requires the monitoring of priority pollutants entering surface waters. This includes notably stormwater network. In this study, the contribution of discharges from washes stations to pollution of stormwater network was investigated. Six washes stations discharging wastewater into the stormwater network were selected: (i) one trucks wash station, (ii) two self-service stations for cars and motorcycles, (iii) two bus wash stations, (iv) one subway wash station. Classical parameters (conductivity, pH, turbidity, chemical oxygen demand, total nitrogen, total phosphorus, suspended solid) and organic pollutants (Polycyclic Aromatic Hydrocarbons, Total Hydrocarbons and Methylterbutylether) were2 checked and measured. Concentrations were compared with limit values from Greater Toulouse decontamination service regulations for the discharge licenses of carwashes, and under article 32 of the French decree for discharges into the natural environment (Decree February 2nd 29 , 1998) and with the proposal directive from the European Parliament and the Council, dealing with environmental quality standards (European Commission, 2006). The result showed a decrease of pollution downstream of the pre- treatments for subway washes stations but not for bus washes stations. According to the directives, the pre- treatment processes were not sufficient to justify a discharge into the stormwater network.

The relationships between total mercury (Hg) concentration and stable nitrogen isotope ratio (delta N-15) were evaluated in Mullus barbatus barbatus and M. surmuletus from the Mediterranean Sea and M. barbatus ponticus from the Black Sea. Mercury concentration in fish muscle was six times higher in the two Mediterranean species than in the Black Sea one for similar sized animals. A positive correlation between Hg concentration and delta N-15 occurred in all species. Increase in Hg concentration with delta N-15 was high and similar in the two Mediterranean fishes and much lower in the Black Sea species. Since this was neither related to trophic level difference between species nor to methylmercury (MeHg) concentration differences between the north-western Mediterranean and the Black Sea waters, we suggested that the higher primary production of the Black Sea induced a dilution of MeHg concentration at the base of the food webs. (c) 2009 Elsevier Ltd. All rights reserved.

L'objectif de la stratégie du projet CLIMB est d'utiliser et d'intégrer des techniques de suivi avancées sur le terrain, des analyses et des recherches de données faisant appel à la télédétection, de vérification de modèles d'évolution climatique et de modélisation par l'intégration hydrologique, et d'évaluation des facteurs socio-économiques dans un cadre conceptuel nouveau afin de réduire de façon significative les incertitudes existantes au sein des analyses des impacts du changement climatique. Ce projet créera un outil intégré d'évaluation du risque qui servira à gérer d'une façon adaptée les ressources en eau et à mettre en ½uvre les meilleures pratiques agricoles possibles dans les conditions du changement climatique. Cet outil d'analyse du risque et de la vulnérabilité permettra aussi l'évaluation des risques dans le cas d'actions conflictuelles. On comparera les modèles améliorés, les nouveaux outils d'évaluation, et leurs résultats aux méthodologies couramment utilisées. On diffusera les progrès obtenus aux parties prenantes et aux décideurs sous une forme transparente et facile à comprendre, leur permettant d'une part d'utiliser les résultats fraichement produits, tant dans les initiatives relatives à la ressource régionale en eau et à la gestion de l'agriculture, et d'autre part de réduire la source de conflit potentiel. | The strategy of CLIMB is aiming to employ and integrate advan¬ced field monitoring techniques, remote sensing ana-lyses and retrievals, climate models auditing and integra¬ted hydrologic modeling and socioeconomic factor assess¬ment in a new conceptual framework to significantly reduce exist-ing uncertainties in climate change impact analysis. It will create an integrated risk assessment tool for adaptive water resources management and best agricultural practice under climate change conditions. The risk and vulnerability analysis tool will also enable the assess¬ment of risks for conflict-inducing actions. The impro¬ved models, new assessment tools, and their results will be evaluated against current methodologies. Improvements will be communicated to stakeholders and decision makers in a transparent, easy-to-understand form, enabling them to utilize the new findings in regional water resource and agricultural management initiatives as well as in the design of mechanisms to reduce potential for conflict CLIMB is embedded in a cluster of independent EU- projects with WASSERMed and CLICO, focused on climate induced changes in water resources as a threat to security.

This paper describes the PREI (Posidonia oceanica Rapid Easy Index), a method used to assess the ecological status of seawater along Mediterranean French coasts. The PREI was drawn up according to the requirements of the Water Framework Directive (WFD 2000/60/EC) and was tested on 24 and 18 stations in PACA (Provence-Alpes-Cotes d'Azur) and Corsica, respectively. The PREI is based on five metrics: shoot density, shoot leaf surface area, E/L ratio (epiphytic biomass/leaf biomass), depth of lower limit, and type of this lower limit. The 42 studied stations were classified in the first four levels of status: high, good, moderate and poor. The PREI values ranged between 0.280 and 0.847; this classification is in accordance with our field knowledge and with our knowledge of the literature. The PREI was validated regarding human pressure levels (r(2)=0.74). (http://eurex.europa.eu/LexUriServ/LexUriServ.do?uri=OJ:L:2000: 327:0001:0072:EN:PDF). (C) 2009 Elsevier Ltd. All rights reserved.

This study was carried out in shrimp ponds from New Caledonia, in order to determine the cause of the exceptional proportion of abnormal tests (FAI) (often >50%, sometimes >80%). FAI was positively correlated to the quantity of easily oxidized material (EOM) deposited on the bottom of the ponds and to the sediment oxygen demand, and negatively correlated to redox. These results suggest that a very high FAI is a potential indicator for great accumulations of native organic matter, leading to a high sediment oxygen demand. When studying ancient sediments in core samples, exceptional abundances of abnormal tests may indicate periods of high accumulation of EOM, and therefore of oxygen depletion. This finding should help in better management of aquaculture ponds, but should also allow new insight into the interpretation of sedimentary records, providing a useful proxy for paleoenvironmental reconstructions.

[Departement_IRSTEA]Territoires [TR1_IRSTEA]SYNERGIE | International audience | The strategy of CLIMB is aiming to employ and integrate advan¬ced field monitoring techniques, remote sensing ana-lyses and retrievals, climate models auditing and integra¬ted hydrologic modeling and socioeconomic factor assess¬ment in a new conceptual framework to significantly reduce exist-ing uncertainties in climate change impact analysis. It will create an integrated risk assessment tool for adaptive water resources management and best agricultural practice under climate change conditions. The risk and vulnerability analysis tool will also enable the assess¬ment of risks for conflict-inducing actions. The impro¬ved models, new assessment tools, and their results will be evaluated against current methodologies. Improvements will be communicated to stakeholders and decision makers in a transparent, easy-to-understand form, enabling them to utilize the new findings in regional water resource and agricultural management initiatives as well as in the design of mechanisms to reduce potential for conflict CLIMB is embedded in a cluster of independent EU- projects with WASSERMed and CLICO, focused on climate induced changes in water resources as a threat to security. | L'objectif de la stratégie du projet CLIMB est d'utiliser et d'intégrer des techniques de suivi avancées sur le terrain, des analyses et des recherches de données faisant appel à la télédétection, de vérification de modèles d'évolution climatique et de modélisation par l'intégration hydrologique, et d'évaluation des facteurs socio-économiques dans un cadre conceptuel nouveau afin de réduire de façon significative les incertitudes existantes au sein des analyses des impacts du changement climatique. Ce projet créera un outil intégré d'évaluation du risque qui servira à gérer d'une façon adaptée les ressources en eau et à mettre en ½uvre les meilleures pratiques agricoles possibles dans les conditions du changement climatique. Cet outil d'analyse du risque et de la vulnérabilité permettra aussi l'évaluation des risques dans le cas d'actions conflictuelles. On comparera les modèles améliorés, les nouveaux outils d'évaluation, et leurs résultats aux méthodologies couramment utilisées. On diffusera les progrès obtenus aux parties prenantes et aux décideurs sous une forme transparente et facile à comprendre, leur permettant d'une part d'utiliser les résultats fraichement produits, tant dans les initiatives relatives à la ressource régionale en eau et à la gestion de l'agriculture, et d'autre part de réduire la source de conflit potentiel.

[Departement_IRSTEA]Territoires [TR1_IRSTEA]SYNERGIE | International audience | The strategy of CLIMB is aiming to employ and integrate advan¬ced field monitoring techniques, remote sensing ana-lyses and retrievals, climate models auditing and integra¬ted hydrologic modeling and socioeconomic factor assess¬ment in a new conceptual framework to significantly reduce exist-ing uncertainties in climate change impact analysis. It will create an integrated risk assessment tool for adaptive water resources management and best agricultural practice under climate change conditions. The risk and vulnerability analysis tool will also enable the assess¬ment of risks for conflict-inducing actions. The impro¬ved models, new assessment tools, and their results will be evaluated against current methodologies. Improvements will be communicated to stakeholders and decision makers in a transparent, easy-to-understand form, enabling them to utilize the new findings in regional water resource and agricultural management initiatives as well as in the design of mechanisms to reduce potential for conflict CLIMB is embedded in a cluster of independent EU- projects with WASSERMed and CLICO, focused on climate induced changes in water resources as a threat to security. | L'objectif de la stratégie du projet CLIMB est d'utiliser et d'intégrer des techniques de suivi avancées sur le terrain, des analyses et des recherches de données faisant appel à la télédétection, de vérification de modèles d'évolution climatique et de modélisation par l'intégration hydrologique, et d'évaluation des facteurs socio-économiques dans un cadre conceptuel nouveau afin de réduire de façon significative les incertitudes existantes au sein des analyses des impacts du changement climatique. Ce projet créera un outil intégré d'évaluation du risque qui servira à gérer d'une façon adaptée les ressources en eau et à mettre en ½uvre les meilleures pratiques agricoles possibles dans les conditions du changement climatique. Cet outil d'analyse du risque et de la vulnérabilité permettra aussi l'évaluation des risques dans le cas d'actions conflictuelles. On comparera les modèles améliorés, les nouveaux outils d'évaluation, et leurs résultats aux méthodologies couramment utilisées. On diffusera les progrès obtenus aux parties prenantes et aux décideurs sous une forme transparente et facile à comprendre, leur permettant d'une part d'utiliser les résultats fraichement produits, tant dans les initiatives relatives à la ressource régionale en eau et à la gestion de l'agriculture, et d'autre part de réduire la source de conflit potentiel.