<論文>風蓮湖とサロマ湖における酪農汚濁物質の水質への影響に関する数値解析

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This paper describes a numerical analysis of the diffusion problems of contaminant in lakes and compares the incidence of the contaminant upon the water pollution in lakes Furenko and Saromako in the dairy area of the east part of Hokkaido. The contaminant, such as the arisings of dairying, is apprehensive that it may yield water pollution in a lake near the dairy area in the east part of Hokkaido. To understand the diffusion of contaminant in the lake, the flow field governed by the shallow water equation and the nondimensional time-dependent advection-diffusion equation have been computed by the three-step finite element method. In order to forecast the main reason of water pollution in lakes Furenko and Saromako, the numerical simulations of Sc (Schmidt number) =100 and 1,000 by make use of different boundary conditions are carried out to demonstrate the distribution of concentration in different diffusivities. According to the numerical results obtained by the present numerical simulations, it is concluded that the affluent of the contaminant due to dairying from river does not seem to affect seriously in the lake Saromako but the lake Furenko may considerable that the water pollution might be yield by the contaminant due to dairying if the appropriate husbandry was not performed.
北海道東海大学の論文
2003-03-25