<論文>道東大規模酪農地域における湖内の汚濁物質移流拡散有限要素解析

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This paper describes an analysis of the advection-diffusion of contaminant in a lake by finite element method. 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. Onneto, a lake in Kushiro city in which the water pollution is frequently observed, is chosen an analytical domain in this paper. To understand the advection-diffusion of contaminant in the lake Onneto, the flow field governed by the shallow water equation and the non-dimensional 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 the lake Onneto, 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 Onneto.
北海道東海大学の論文
2002-03-25