Journal of Food, Agriculture and Environment

Revised random walk model for degradable pollutant in surface water 

Author(s):

Longxi Han ^{1, 2, 3}*, Lina Chen ^{1, 4}, Hong Ji ³, Hui-lian Xu ⁵

Recieved Date: 2012-10-10, Accepted Date: 2013-01-30

Abstract:

Existing random walk model for water quality only takes convection and diffusion of pollutants into account, but neglects degradation of pollutants. In this study, as an improvement, a two-dimension random walk water quality model considering the role of self-purification is established based on the assumption of first-order reaction kinetics of biodegradable pollutants. Through a typical case for model test, simulation solution of the revised random walk model and analytical solution of the two-dimension convection-diffusion equation were compared. The results show that their conclusions are unanimous. Reflecting  the pollutant migration and pollutant degradation is the feature of the revised random walk model. 

Keywords:

Degradable water pollutant, random walk model, water quality model, two-dimension

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Journal: Journal of Food, Agriculture and Environment
Year: 2013
Volume: 11
Issue: 1
Category: Environment
Pages: 924-927

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