Contaminant Fate and Transport Model in Pool-and-Riffle Streams

by Il Won Seo, Seoul Nat Univ, Seoul, Republic of Korea,
Dae Young Yu, Seoul Nat Univ, Seoul, Republic of Korea,
Jae-Hyung Lee, Seoul Nat Univ, Seoul, Republic of Korea,



Document Type: Proceeding Paper

Part of: Hydraulic Engineering

Abstract:

The complex nature of solute transport and transformation processes in natural streams has been investigated using numerical solution of a proposed mathematical model. This model is based on sets of mass balance equations describing the hydrodynamic transport processes in the stream, mass exchange processes in the storage zone and sorption/desorption processes between stream water and bed sediment. The comparison of concentration-time curves predicted using proposed model and one-dimensional dispersion model to the experimental data shows the proposed model yields better agreements in the general shape, peak concentration and time to peak than one-dimensional dispersion model. The simulation results also demonstrate that simulations with parameters of pool-and-riffle streams better fit the measured data than simulations with parameters of uniform channels.

Subject Headings: Water pollution | Mathematical models | Sediment transport | Stream channels | River and stream beds | Water supply systems | Transport phenomena

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