CRITICAL DEPTH MODEL (MODIFIED SVERDRUP EQUATION) —DESIGN METHOD FOR BUBBLE CIRCULATION—

DOI Web Site 20 References
  • FURUSATO Eiichi
    Institute for Regional Co-creation in Southern Kyusyu and the Nansei Islands, University of Kagoshima
  • BHUYAN Jayatu Kanta
    Dept. of Civil Eng., Indian Institute of Technology
  • MARTEINSSEN Marion
    Department of Biotechnology for Water Treatment, Brandenburg University of Technology
  • NIXDORF Brigitte
    Department of Freshwater Conservation, Bad Saarow Research Station, Brandenburg University of Technology
  • IMAMOTO Hiroomi
    Water Resources Engineering Department, Japan Water Agency

Abstract

<p> A new critical depth (zcr) model was developed by adding light saturation effects during photosynthesis to a Sverdrup zcr model in order to design an artificial circulation system as a countermeasure to eutrophication. A Blackman-type equation was selected from various P-I equations for its accuracy and relationship to the original Sverdrup model. Quantitative differences between the zcr values of some new equations were found to be remarkable in specific high light conditions. Furthermore, the zcr calculated by the Sverdrup model overestimated the zcr compared to the modified Sverdrup equation proposed by this research. We discuss methods for the design of a practical air diffuser depth that prevents cyanobacteria bloom from the point of view of design and management of bubble circulation countermeasures.</p>

Journal

  • Journal of JSCE

    Journal of JSCE 7 (1), 185-192, 2019

    Japan Society of Civil Engineers

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