Visualization of River Water Flow in Hydrodynamically Active Areas under Different Flow Regimes

• Autorzy: Snitynskyi Volodymyr , Khirivskyi Petro , Hnativ Ihor , Yakhno Oleg , Machuga Oleg , Hnativ Roman

Identyfikatory

DOI

10.12911/22998993/141385

• Języki publikacji: EN

Abstrakty

EN

It was established that 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 of negative anthropogenic impact on the quality of natural waters is observed. The hydrodynamic barriers or hydrodynamically active areas (HAA) of mountain rivers, characterized by a significant oxygen saturation of the water flow, which activates the processes of biochemical and biological self-purification of surface waters, are important for the efficiency of self-purification processes. In order to verify the results of theoretical and field research, an existing experimental setup was designed and improved. It provided the conditions for modeling the flow of mountain rivers in accordance with the laws of similarity theory and the principles of hydrodynamic modeling. On the basis of the results of field observations in the foothills of rivers, as well as regulatory and design documentation, the limits of the main operating factors were determined, namely the Freud number, flow depth and flow rate, which are decisive in studying the impact of HAA on flow self-cleaning processes. By changing the length of the tray section, the gullies and the waterfall niche of the real hydrodynamically active section were simulated, on which field experiments on the Tyshivnytsia River were conducted. In the studies, measurements were performed at different flow regimes, which simulated different hydrological parameters. In order to analyze the impact of HAA on self-cleaning processes, the flow was visualized using photography. The change in the structure of a stream of natural waters at passage of HAA was established. The high oxygen saturation of the river waters of the Stryi river basin is caused by the influence of HAA, which contribute to the purification of polluted waters from biological pollutants and other man-made pollutants and form the high quality of water resources in the region. A method of modeling and visualization of mountain rivers in the laboratory was developed.

Słowa kluczowe

EN

mountain river; self-cleaning process; surface waters; hydrodynamically active area; flow visualization; cavitation phenomena

• Wydawca: Polskie Towarzystwo Inżynierii Ekologicznej ; Lublin University of Technology
• Czasopismo: Journal of Ecological Engineering
• Rocznik: 2021
• Tom: Vol. 22, nr 9
• Strony: 129--135
• Opis fizyczny: Bibliogr. 14 poz., rys.

Twórcy

autor

Snitynskyi Volodymyr

• Department of Ecology, Lviv National Agrarian University, Volodymyra Velykoho str., 1, Dublyany, Lviv region, 30831, Ukraine

• https://orcid.org/0000-0001-9633-1004

autor

Khirivskyi Petro

• Department of Ecology, Lviv National Agrarian University, Volodymyra Velykoho str., 1, Dublyany, Lviv region, 30831, Ukraine

• https://orcid.org/0000-0001-7246-9260

autor

Hnativ Ihor

• Department of Ecology, Lviv National Agrarian University, Volodymyra Velykoho str., 1, Dublyany, Lviv region, 30831, Ukraine

• https://orcid.org/0000-0002-2987-1673

autor

Yakhno Oleg

• Institute of Mechanical Engineering, National Technical University of Ukraine, Igor Sikorsky Kyiv Polytechnic Institute, Peremohy ave., 37, Kyiv, 03056, Ukraine

• https://orcid.org/0000-0002-9522-5549

autor

Machuga Oleg

• Department of Forest Machines, National Forestry University of Ukraine, General Tchuprynka str., 103, Lviv, 29057, Ukraine

• https://orcid.org/0000-0002-9151-8854

autor

Hnativ Roman

• Institute of Civil Engineering and Building Systems, Lviv Polytechnic National University, Karpinsky str., 6, Lviv, 79013, Ukraine

• https://orcid.org/0000-0002-4931-7493

Bibliografia

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