Numerical Experiments of Prediction of Contaminant Diffusion in Kura River
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Abstract
Numerical simulation of distribution of contaminants discharged to Kura River is elaborated using nonstationary linear three-dimensional equation of transition-diffusion of substances in continuous medium. Model is meant for study of distribution of polluting agents in Kura River in the first approximation. Kura River is divided in 10 conventionally uniform linear sections and annual average values of hydrological parameters specific for the river are used for each section. Ammonium ions ( ) distribution discharged from cities situated at Kura River is modeled. Distribution pattern for ammonium ions concentration in Kura River is received using numerical experiment. It is shown that values of concentration received via mathematical modeling with permissible accuracy are coincided with data of field observations.
Distribution of passive polluting agents thrown to Kura River near Georgian-Turkish state border is modeled using numerical experiment in case of stationary source. Using the modeling there is determined the time, which is necessary for polluting agent to reach points placed along the river, to pass various sections of river, to reach Georgian-Azerbaijan border and Mingachevir reservoirs. Distribution pattern of polluting agent concentration in the river bed, as well as concentration change when passing from one section to another are determined, and relative change of concentration in 10 conventional river sections is estimated.
Distribution of passive contaminant thrown to Kura river by salvo during 6 hours near Georgian-Turkish state border is studied. Pattern of gradual shift of the contamination plume in Georgian section of Kura River and gradual concentration change are shown.
A possibility of using the model for prediction aims is considered.The correspoding tasks are determined.
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References
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