Impact of luxuriant aquatic plants on thermal convection in a closed water body

Kunihiko Hamagami, Bui Quoc Lap, Ken Mori, Yasumaru Hirai

Research output: Contribution to journalArticle


The attenuation of heat flux at the water surface with aquatic plants was examined by hydraulic experiments to consider the influence of aquatic plants on the magnitude of thermal disturbance in the closed water body. First of all, the experiment measuring temperatures on surface of leaf revealed the thermal conductivity of the leaf which is peculiar physicality of each aquatic plant. Then, the hydraulic experiment examined attenuation of the underwater illuminance and the heat flux in the covered part which depending on the kind and the luxuriant density of the aquatic plants. As the result, it is clarified that the attenuation rate of the illuminance is large in the plant with a thick leaf, and that the heat flux at the water surface and the developmental velocity of the mixed layer decreased when the luxuriant density of the aquatic plants increased.

Original languageEnglish
Pages (from-to)187-195
Number of pages9
JournalPaddy and Water Environment
Issue number3
Publication statusPublished - Aug 1 2009


All Science Journal Classification (ASJC) codes

  • Environmental Engineering
  • Agronomy and Crop Science
  • Water Science and Technology

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