Vers une évaluation absolue de la durabilité écologique : quelle variabilité des valeurs de référence associées à l'écotoxicité aquatique ?

Abstract : In LCA, some impact categories such as freshwater ecotoxicity represent local processes. Recent works about absolute environmental sustainability aims to develop LCA normalization references based on ecological carrying capacities. However, they does not always take into account the spatial extent of the local impacts and the ecological characteristics of the affected environments. The objective of this article is to estimate normalization references for the major French watersheds and the entire France mainland territory in order to test their sensitivity to different hypotheses. The spatial scale (river basin, France, Europe and World) and the demographic dynamics in the geographical entities prove to be sensitive parameters; the uncertainties due to this temporal and spatial variability must be taken into account during the normalization stage of the local impacts. Also, the lack of consideration of groundwater resources in the calculation of the normalization references has been identified as a strong hypothesis. Finally, the assessment and integration of the geochemical background in the calculation of carrying capacity-based normalization references could be the subject of future interdisciplinary investigations. Thus, this article pleads for the definition of the relevant spatial and temporal scale as an essential preliminary step in view of absolute environmental sustainability assessment.
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https://hal-emse.ccsd.cnrs.fr/emse-01895300
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Submitted on : Monday, October 15, 2018 - 9:22:20 AM
Last modification on : Wednesday, November 20, 2019 - 2:37:52 AM

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Franck Kambou, Natacha Gondran, Anastasia Wolff, Yves Perrodin. Vers une évaluation absolue de la durabilité écologique : quelle variabilité des valeurs de référence associées à l'écotoxicité aquatique ?. Déchets Sciences et Techniques, 2018, ⟨10.4267/dechets-sciences-techniques.3792⟩. ⟨emse-01895300⟩

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