Hybrid model development for the decaying pollutant transport in streams Online publication date: Sat, 20-Sep-2014
by Muthukrishnavellaisamy Kumarasamy; Narayan C. Ghosh; Govinda C. Mishra; Mitthan L. Kansal
International Journal of Environment and Waste Management (IJEWM), Vol. 12, No. 2, 2013
Abstract: A Hybrid Cells in Series (HCIS) model with decay (HCIS-D) has been conceptualised to simulate advection, dispersion, decay governed pollutant transport. The cells consist of a plug flow zone followed by two unequal size thoroughly mixed zones applied to steady flow and prismatic stream reaches. Compared to the analytical solution of the advection-dispersion-decay equation, the HCIS–D simulations were in good agreement when the size of the hybrid unit, Δx, satisfies the condition, Δx u/DL ≥ 4 or [(α + T1 + T2)u/Δx] ≈ 1, where u is the mean flow velocity, DL is the longitudinal dispersion co-efficient, α, T1 and T2 are residence times of plug flow zone, first and second mixed zones of hybrid unit respectively. The potential of the HCIS-D model has been demonstrated using synthetic and field data and the results of the HCIS–D model for non-conservative/decaying pollutant transport were in the expected lines.
Existing subscribers:
Go to Inderscience Online Journals to access the Full Text of this article.
If you are not a subscriber and you just want to read the full contents of this article, buy online access here.Complimentary Subscribers, Editors or Members of the Editorial Board of the International Journal of Environment and Waste Management (IJEWM):
Login with your Inderscience username and password:
Want to subscribe?
A subscription gives you complete access to all articles in the current issue, as well as to all articles in the previous three years (where applicable). See our Orders page to subscribe.
If you still need assistance, please email subs@inderscience.com
Our Blog 
Follow us on Twitter 
Visit us on Facebook