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System dynamics approach to control over water quality on the urbanized territories

N. Kizilova, N. Rychak, Y. Rudnev
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Description: Modern geoinformation systems provide accurate quantitative forecasts of available and quality of drinking and technical water resources based on the results of long-term observervations. Their statistical analysis and mathematical models, which are especially important in megacities with their extensive infrastructure and anthropogenic impacts on drinking water sources. The models are based on geographic information systems, direct measurement data and detailed mathematical models of the dynamics of water systems. The paper provides information on hydrogeological objects located in the urban basins of the geological system of the Kharkov River on the territory of the Kharkov city. The measurement data on the water level and flow speed along the rivers in the geological system, pollution concentrations in the water samplings (heavy metals, sulfates, petroleum products, etc.) are presented. Using SRTM radar data, a detailed three-dimensional geometric model of the landscape profile was constructed, and hydrological parameters and pollution concentrations were calculated. By comparing the calculated and measured data, a number of uncertain model parameters were determined. Based on the corrected model, detailed calculations in different seasons of 2014-2017 years have been computed. Bothe measured and calculated data has been stored in the database of the geographic information system for further processing. A good agreement between the measured data and the results of mathematical modeling has been obtained. A special environmental hazard and the largest discrepancy between both data have been found for the content of Co, Cu, sulfates and oil products in river waters. New results make it possible to study various scenarios of the available volumes and quality of water in urban areas.


Keywords: geoinformatics, mathematical modeling, hydrogeology, river beds, ecology

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Reference:
 Kizilova, N.M., Rychak, N.L. and Rudniev, Yu.I. (2019), “Pidkhid systemnoi dynamiky do kontroliu za yakistiu vody na urbanizovanykh terytoriiakh” [System dynamics approach to control over water quality on the urbanized territories], Information Processing Systems, Vol. 4(159), pp. 87-92. https://doi.org/10.30748/soi.2019.159.10.