PRESERVATION OF STRUCTURAL AND DYNAMIC PROPERTIES OF NATURAL WATER DURING ITS CONDITIONING

The quality of natural and conditioned water is traditionally characterized by average indicators of its composition and properties. For many water management tasks, this is insufficient, and it is necessary to take into account the amplitude and frequency of fluctuations in pollutant concentrations in a wide range of frequencies, including subhourly ones. According to existing concepts, such variability (variability) should be softened during water purification. However, the article substantiates that during water treatment, the variability of impurity concentrations is preserved and can even increase, partially preserving the dynamic characteristics of natural water. Although the distribution function of the concentration of the controlled impurity is transformed during the water purification (conditioning) process, but, as shown by the example of measuring the content of fine particles (turbidity), the structural and dynamic properties of natural water are preserved. To prove this important circumstance in theoretical and applied terms, methods of statistical analysis of time series of turbidity of natural and conditioned by coagulation and filtration of water were used. It was shown, in particular, on representative arrays of subhourly experimental data obtained in different periods of the water regime of rivers in the basins of the Pacific and Arctic Oceans that conditioning, as a rule, does not decrease, but increases the coefficient of variation of turbidity. At the same time, coefficients of determination of quantile diagrams close to unity are observed and cause-and-effect relationships between the controlled indicators of the water received for treatment and purified water are preserved.