鉛直2次元定常流場に設置された衝立型構造物による植物プランクトンと栄養塩の変化予測に関する数値実験

DOI 日本農学文献記事索引 Web Site 被引用文献1件 参考文献8件

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タイトル別名
  • A Numerical Simulation of Forecasting the Distribution Change of Phytoplankton and Nutrient Induced by a Submerged Structure in Vertically 2-dimensional Steady Fｌow Field
  • エンチョク 2ジゲン テイジョウ ナガレバ ニ セッチ サレタ ツイタテガタ コウゾウブツ ニ ヨル ショクブツ プランクトン ト エイヨウエン ノ ヘンカ ヨソク ニ カンスル スウチ ジッケン

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説明

Numerical experiments were conducted to estimate the change of flow condition and the distribution of phytoplankton and nutrient by a submerged structure for upwelling in vertically 2-D steady flow field, using a coupled physical-biological model with changing parameters which are inflow velocity and turbulent diffusion coefficient. Nutrient uptake and the loss of phytoplankton including physiological death, exudation of organic substances and predation by zooplankton are considered as biological terms in the goveming equations. The computational domain is 2km long and 50.5m deep. The structure with 10m height is set lkm downstream from the inflow boundary. As increasing the inflow velocity, the phytoplankton decreases in the upper and middle layers and, on the contrary, nutrients increases. However, they reaches certain values when the inflow velocity is over 0.3m/s. Biological tems are dominant in the surface layer. On the other hand, the physical terms (advection and diffusion) are dominant in the bottom layer. In the middle layer, the increment by nutrient uptake balances with decrease by advection, diffusion and the loss.

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