Modeling Low Flow Transport of Nonconservative Pollutants in Streamsby Il Won Seo, Seoul Nat Univ, Seoul, Republic of Korea,
Dae Young Yu, Seoul Nat Univ, Seoul, Republic of Korea,
Abstract: The complex nature of low flow transport and transformation of nonconservative pollutants in natural streams has been investigated using a numerical solution of a proposed mathematical model that is based on a set of mass balance equations describing the advection, dispersion, decay and mass exchange mechanisms in streams and in storage zones. In the present study, a mathematical model (named storage-transformation model) has been developed to predict adequately the non-Fickian nature of mixing and transformation mechanisms for decaying substances in natural streams under low flow conditions. Comparisons between the concentration-time curves predicted using the proposed model and the measured stream data shows that the Storage -Transformation Model yields better agreements in the general shape, peak concentration and time to peak than the I-D dispersion model. The proposed model shows significant improvement over the conventional I-D dispersion model in predicting natural mixing and storage processes in streams through pools and riffles.
Subject Headings: Mathematical models | Water pollution | Water storage | Low flow | Data processing | Sediment transport | Pollutants | Mathematics
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