Abstract
Visualization of River Water Flow in Hydrodynamically Active Areas under Different Flow Regimes
Highlights
Self-purification of natural watercourses occurs under the influence of extremely different factors acting simultaneously in different combinations, namely: a) hydraulic – dilution and mixing of pollutants with the bulk of water; b) mechanical – deposition of suspended particles; c) physical – the effects of solar radiation and temperature; d) chemical – oxidation of organic and mineral pollutants; e) biological – flora and fauna, which participates in the process of natural self-purification
In the territory of the Stryi river basin, the natural landscapes are maximally preserved in comparison with other regions of Western Ukraine, but under modern conditions, an increase in the negative anthropogenic impact on the quality of natural waters is observed
The purpose of the work was to determine the influence of hydrodynamically active areas (HAA) of mountain rivers on the processes of natural self-purification and to develop the methods of laboratory modeling of these areas to determine the hydrochemical parameters of river waters
Summary
Self-purification of natural watercourses occurs under the influence of extremely different factors acting simultaneously in different combinations, namely: a) hydraulic – dilution and mixing of pollutants with the bulk of water; b) mechanical – deposition of suspended particles; c) physical – the effects of solar radiation and temperature; d) chemical – oxidation of organic and mineral pollutants; e) biological – flora and fauna, which participates in the process of natural self-purification.In the territory of the Stryi river basin, the natural landscapes are maximally preserved in comparison with other regions of Western Ukraine, but under modern conditions, an increase in the negative anthropogenic impact on the quality of natural waters is observed. Self-purification of natural watercourses occurs under the influence of extremely different factors acting simultaneously in different combinations, namely: a) hydraulic – dilution and mixing of pollutants with the bulk of water; b) mechanical – deposition of suspended particles; c) physical – the effects of solar radiation and temperature; d) chemical – oxidation of organic and mineral pollutants; e) biological – flora and fauna, which participates in the process of natural self-purification. The hydrodynamic barriers or hydrodynamically active sections of mountain rivers, characterized by a significant oxygen saturation of the water flow, which activates the processes of biochemical and biological self-purification of natural waters, are important for increasing the efficiency of self-purification processes. As a result of these processes there is a maximum saturation of water with dissolved oxygen with the effect of biological treatment of “natural treatment plant”, which is accompanied by the phenomenon of short-term change of clear and colorless water to opaque and white fluid [Borutska, 2015]
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