IVANOVA YU.E., OBODOVSKYI O.G. ASSESSMENT OF VERTICAL CHANNEL DEFORMATIONS OF THE RIVERS OF THE WESTERN BUG BASIN
DOI: https://doi.org/10.17721/2306-5680.2024.2.2
Hydrology, Hydrochemistry and Hydroecology. 2024. № 2 (72)
Publication language: Ukrainian
Authors:
Ivanova Yu.E., Taras Shevchenko National University of Kyiv
Obodovskyi O.G., Taras Shevchenko National University of Kyiv
The article examines the modern conditions of the manifestation of vertical channel deformations on the rivers of the Western Bug basin. Given the transboundary nature of the river, data from hydrological stations located both in Ukraine and in Poland were included in the assessment. Assessments of deformations were carried out both continuously (according to longitudinal profiles) and discretely (according to data from hydrological posts) for a period of more than 40 years of observation. It was established that, in general, the processes of sedimentation of sediments prevail on the considered rivers. On the other hand, the Rata River has a predominance of erosion processes. The conducted calculations proved that in the studied territory the intensity of the increase in water levels ranges from 0.34 to 2.03 cm per year. This is confirmed by both continuous and discrete estimates of vertical channel deformations. The highest indicators of accumulation were obtained for the lower reaches of the Western Bug and they amounted to +2.03 cm per year. In turn, subsidence of the levels was recorded only for the Rata River, to 0,72 cm per year. In general, the Rata River basin is subject to various economic influences, including water use, agricultural nature management, intensive drainage melioration (straightening of the channel), which affect the development of erosion processes. It is proven that in the last decades, a low-water phase was observed on the studied rivers. This, in turn, also contributed to the general development of accumulation processes (sediment sedimentation). Based on the analysis of vertical deformations, it is possible to confirm the mutual confirmation of their continuous and discrete estimates for the studied rivers. Despite the different scale of assessments and established intensity of manifestation, both approaches point to the prevalence of an increase in levels, i.e. accumulation of sediments in riverbeds. In general, the numerical estimates for these approaches almost coincided.
Key words: rivers of the Western Bug basin, vertical channel deformations, continuous and discrete manifestation of deformations, longitudinal profiles of rivers, flow curves.
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HOW TO CITE
Ivanova, Yu.E., Obodovskyi, O.G. (2024). Assessment of vertical channel deformations of the rivers of the Western Bug basin. Hidrolohiia, hidrokhimiia i hidroekolohiia [Hydrology, Hydrochemistry and Hydroecology], 2(72), 17-28 (in Ukrainian, abstr. in English). https://doi.org/10.17721/2306-5680.2024.2.2