Persistency of artificial aeration at hypertrophic Lake Tuusulanjärvi: A sociohistorical analysis

Abstract

With present-day scientific evidence challenging the efficiency of artificial aeration as an effective restoration method for eutrophicated lakes, our sociohistorical investigation traces the reasons for the persistent support for this method in Finland, where about one hundred lakes are subject to this treatment. Our study employed the concepts of technological path and aeration frame to analyze the extensive restoration and aeration history of the hypertrophic Tuusulanjärvi in southern Finland. Continuously aerated since 1972, it has the longest history of aeration in Finland. Qualitative analysis of documentary and archival sources revealed that the longstanding preference for aeration in the context of increasing scientific controversy was based on its functional versatility and seemingly unproblematic applicability in regard to shifting emphasis and goal setting of restoration. Additionally, the stability of the aeration frame has been supported by the practical and emotional attachment of local residents to lake restoration, particularly aeration, and finally the problems and contradicting interests related to alternative restoration methods.

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Source Hertta database (2017)

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Archival and other unpublished material

  1. The archival material of the Tuusulanjärvi Water Protection Association is stored in a poorly organized state at the City Archives of Järvenpää. The material there is compiled in folders that are inconsistently named and only indicatively reflect the respective folder content.

  2. Järvenpää city archive (JCA)

  3. Archival unit: TVSY (Tuusulanjärven vesiensuojeluyhdistys, i.e. TWPA Tuusulanjärvi Water Protection Association). The combination of TVSY + number/other label indicates the name of the folder in the archive.

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Acknowledgements

The authors would like to thank research assistant Milja Heikkinen for helping to gather the study material. The study was supported by the Academy of Finland (Grants 263468, 263464, and 286676).

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Correspondence to Paula Schönach.

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Schönach, P., Tapio, P., Holmroos, H. et al. Persistency of artificial aeration at hypertrophic Lake Tuusulanjärvi: A sociohistorical analysis. Ambio 46, 865–877 (2017). https://doi.org/10.1007/s13280-017-0926-6

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Keywords

  • Artificial aeration
  • Hypertrophic lake
  • Lake restoration
  • Restoration history
  • Technological frame
  • Tuusulanjärvi