Presentation a New Method in Mathematical Modeling of pollutant Transport in Rivers with Storage Zones

Predicting the transfer of pollutants in the water zones is of particular importance in the management and prevention of surface water pollution. The heterogeneity and non-conformance in morphology along the river, known to the Storage zone, will change the uniform Transport of pollutants to the downstream. The storage zones are actually places around the river where velocities are significantly slower than the rivers and are also famous as dead zones. The presence of these areas in rivers makes it difficult for them to use the classical equation of pollutant transport. To more accurate simulation of the transport of pollutants in natural rivers with storage zone, modifications should be made to the Advection- dispersion equation. In this research, a new approach to achieve more accurate simulation of transport of pollutant material by considering the changes of pollutant dispersion flux in a nonlinear method and considering the storage zone will be presented. To validate the model presented from the hypothetical example and actual data used. Based on the measured results, the output of the model is an acceptable adaptation with the observed data and shows that the proposed model is accurate and acceptable in simulating the transport of solute in rivers with the Storage zone and it can replace the classic model of pollutant transport in these type of rivers.