JZUS - Journal of Zhejiang University SCIENCE

Journal of Zhejiang University SCIENCE A 2013 Vol.14 No.2 P.110-119

http://doi.org/10.1631/jzus.A1200231

Modeling pollutant transport in overland flow over non-planar and non-homogenous infiltrating surfaces*

Author(s): Zhi-guo He¹, Gokmen Tayfur², Qi-hua Ran³, Hao-xuan Weng¹
Affiliation(s): 1. Department of Ocean Science and Engineering, Zhejiang University, Hangzhou 310058, China; more
Corresponding email(s): ranqihua@zju.edu.cn
Key Words: Diffusion wave, Variation, Topography, Roughness, Infiltration, Pollutant, Modeling, Overland flow

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Zhi-guo He, Gokmen Tayfur, Qi-hua Ran, Hao-xuan Weng. Modeling pollutant transport in overland flow over non-planar and non-homogenous infiltrating surfaces[J]. Journal of Zhejiang University Science A, 2013, 14(2): 110-119.

@article{title="Modeling pollutant transport in overland flow over non-planar and non-homogenous infiltrating surfaces",
author="Zhi-guo He, Gokmen Tayfur, Qi-hua Ran, Hao-xuan Weng",
journal="Journal of Zhejiang University Science A",
volume="14",
number="2",
pages="110-119",
year="2013",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.A1200231"
}

%0 Journal Article
%T Modeling pollutant transport in overland flow over non-planar and non-homogenous infiltrating surfaces
%A Zhi-guo He
%A Gokmen Tayfur
%A Qi-hua Ran
%A Hao-xuan Weng
%J Journal of Zhejiang University SCIENCE A
%V 14
%N 2
%P 110-119
%@ 1673-565X
%D 2013
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A1200231

TY - JOUR
T1 - Modeling pollutant transport in overland flow over non-planar and non-homogenous infiltrating surfaces
A1 - Zhi-guo He
A1 - Gokmen Tayfur
A1 - Qi-hua Ran
A1 - Hao-xuan Weng
J0 - Journal of Zhejiang University Science A
VL - 14
IS - 2
SP - 110
EP - 119
%@ 1673-565X
Y1 - 2013
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.A1200231

Abstract
Chinese Summary
Academic Network
Reviewer Comment

Abstract: pollutant transport in overland flow over surfaces with spatially varying microtopography, roughness, and infiltration was investigated using the diffusion wave equation and transport rate-based equation. The finite volume method in space and an implicit backward difference scheme in time were employed in the numerical solution of the 2D governing equations. The developed model was first tested against an analytical solution and an experimental study involving overland flow and the associated pollutant transport, subsequently a series of numerical tests were carried out. Non-point source pollution was investigated under spatially varying microtopography, roughness, and infiltration. The simulation results showed that microtopography and roughness were the dominant factors causing significant spatial variations in solute concentration. When the spatially varying microtopography was replaced by a smooth surface, the result was an overestimation of the solute rate at the outlet of the upland. On the other hand, when the spatially varying roughness was replaced by the average roughness and spatially varying infiltration rate by the average infiltration rate, the pollutant discharge at the outlet of the upland was not significantly affected. The numerical results further showed that one cannot ignore the spatial variations of slope and roughness when investigating the local pollutant concentration distribution.

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