Stratégie de réduction des micropolluants à l’échelle d’un territoire urbain. Le projet "Plan Micropolluants Bordeaux Métropole"

Abstract : With an estimation of 75% of the population who will live in towns in 2020, the consequences of the increase of urbanization and anthropogenic activities are a major issue for the decades ahead. The concentration of the population and industrial and urban activities are responsible for a major pressure on the environment caused by urban outlets. The evolution of our lifestyle and living standards will lead to an increase of micropollutants and active substances. Understanding the origin and impact of micropollutants is a major challenge if we aim to control and to reduce flows and to make cities and territories more sustainable and safer. In this context, Bordeaux Metropolis and LyRE/Suez environment have implemented the “micropollutants project” for a period of 6 years. This project is an overall reflection process that addresses the issue of water pollution in general, from the source of pollution to the environment. This project is composed of two phases. The first phase (2013-2015) seeks to characterize and to quantify the micropollutants in the sewer system of Bordeaux Metropolis. This phase should also identify and understand the origins of emissions to propose suitable reduction levers according with sources. The second phase (2016-2018) will call help to initiate the development of micropollutants reduction solutions on the territory and to monitor the actions. The purpose of this communication is to present methodology used in phase 1, to help decision makers to characterize the problematics substances on its territory and to identify the main sources of these pollutants. The results presented are based on the study site of Blanquefort Jalle river, a tributary of the Garonne river and a suburban area in the northern of the agglomeration (watershed of 347 km²) with significant environmental issues and many uses (market area, drinking water catchment area…).
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Submitted on : Thursday, August 2, 2018 - 2:32:18 PM
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D. Granger, M. Chambolle, V. Dufour, C. Dumora, F. Imart, et al.. Stratégie de réduction des micropolluants à l’échelle d’un territoire urbain. Le projet "Plan Micropolluants Bordeaux Métropole". Techniques Sciences Méthodes , ASTEE/EDP Sciences, 2016, pp.84-98. ⟨10.1051/tsm/201612084⟩. ⟨ineris-01853023⟩

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