Research on Passive Contaminant Transport in a Vegetated Channel

Authors

  • Fatima Jahra Oceanic Consulting Corporation
  • Yoshihisa Kawahara Dept. of Civil and Environmental Engineering, Hiroshima University, Japan

Abstract

Vegetation plays an important role in the physical, ecological, and hydraulic functions of streams, rivers and many other water bodies and can affect the transport of water, sediment and nutrients both within the channel and to or between the riparian zones. This research studied the momentum and passive contaminant transport mechanism in a vegetated channel with a floodplain. Three dimensional numerical simulation and physical experimentations were conducted for turbulent flow in the presence of model vegetation. A non-linear k-ε model with a vegetation model for turbulent flow and an algebraic flux model (DH model) for contaminant transport were adopted. An in-house code developed by the authors was implemented for numerical simulations. Model vegetation zones were prepared in the channel to predict the mixing mechanism. The numerical results were compared with corresponding experimental observations. A good agreement between the simulated and experimental results was observed in terms of pollutant concentration.

Author Biographies

Fatima Jahra, Oceanic Consulting Corporation

Research Engineer, Numerical Simulation Group of Oceanic Consulting Corporation.

Yoshihisa Kawahara, Dept. of Civil and Environmental Engineering, Hiroshima University, Japan

Professor, Dept. of Civil and Environmental Engineering, Hiroshima University, Japan.

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Published

2014-08-04

Issue

Proceedings of the International Conference on Marine and Freshwater Environments (iMFE 2014) - Our Water, Our Future

Section

Environmental and Marine Biotechnology (EMB)

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