Regularities of Hydrochemical Dynamics in a Two-Dimensional Turbulent Flow of Natural Water

Abstract

Variations in the composition and properties of natural waters, which creates numerous difficulties in water use, cannot always be explained by the influence of external forcing such as weathering or leaching of rocks, changes in the phases of the water regime, and other causes. This is especially true for sub-daily and sub-hourly variations in the water quality, which can be caused by complex, previously unknown dynamic hydrochemical processes. Such a conclusion follows from study of the turbidity and pH of natural water measured with increased frequency, the results of which are presented in this work. These results provide evidence about the existence of quasi-cyclic variations in the controlled parameters with different periods, from minute to daily. Study of the observational data allows us to assume that in this case the hydrochemical dynamics is caused by direct and reverse energy cascades in a two-dimensional turbulent flow of natural water, in which the impurity subsystem may be stratified.