Abstract
This paper presents the problem of pollutant propagation monitoring and modeling on the upper zone of a river. The first model of the pollutant propagation is based on the averaging mass balance, without computing chemical and biochemical transformations. The second model was developed using the Streeter Phelps oxygen balance, including the kinetic terms of re-aeration and oxygen consuming. Experimental data set was obtained on the upper zone of the Olt River; using this data set, the proposed model was calibrated. The development of the model is like a part of a GIS-based environmental information system. Calculated results are depicted by diagrams and thematic maps of the upper Basin of Olt River, representing the water-quality parameters.
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