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Ecological Impact Assessment of Pollution on Watercourses

Hydrology

Following an accidental pollution of watercourses, the Water Management Administration (AGE) wanted to assess the ecological impact of these pollutions on the receiving water bodies. These studies are conducted under the framework of the amended law of April 20, 2009, concerning liability for the prevention and remediation of environmental damage, the amended law of December 19, 2008, relating to water, and the law of June 28, 1976, regulating fishing. There is an obligation to restore the initial state as well as to repair ecological losses caused by these pollutions. The polluters, under the technical supervision of AGE, commissioned us for this assessment.

  • Contracting authority Entreprise privée

  • Etude 2022

Key features

  • Collaboration with the polluter and the water management authority

  • Critical review of the relevance of analyses and consideration of pressures other than pollution

  • Morphological, ecological, and qualitative constraints of the existing watercourses

Our missions

  • Estimation of ecological losses and proposal of remediation measures, based on biological assessment of watercourses

  • Analysis of three biological groups: fish, benthic macroinvertebrates, and diatoms

  • Implementation of sampling protocols: IPR for fish, I2M2 for macroinvertebrates, IPS for diatoms

  • Recommendations on relevant indices and selection of monitoring points according to site constraints

  • Literature review and utilization of existing and ongoing data

  • Preparation of an assessment report with proposed remediation measures

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Gauche : Ephéméroptère Leptophlebiidae Genre Habrophlebia / Droite : Ephéméridae Heptageneiidae genre Ecdyonurus