BIRYUKOV O.V. TEMPORAL CHANGES IN THE STRUCTURE OF THE RIVER SYSTEM OF THE PODILIAN HIGHLANDS

DOI: https://doi.org/10.17721/2306-5680.2024.3.6

Hydrology, Hydrochemistry and Hydroecology. 2024. № 3 (73)
Publication language: Ukrainian
Authors:
Biryukov O.V., Kharkiv Nature Conservation College

The reduction in the number of small rivers, the deterioration of water quality, has taken on the scale of a national disaster. Individual watercourses and even entire parts of river systems have disappeared from the geographical map. It is practically impossible to completely stop these processes, but minimizing the consequences of their action is a very real task. In order to understand the nature of the changes and identify the factors affecting the system, it is necessary to conduct a comprehensive study of its past and present. To analyze structural changes in river systems, river systems depicted on topographic maps M 1:100,000 were studied, as well as data obtained by I.P. Kovalchuk. This researcher managed to collect unique material on the structure of the river network of Podolsk rivers over almost a 200-year period. While studying the river system of the Podolsk Upland, I.P. Kovalchuk calculated the number of tributaries Si and their total length li by orders belonging to 1772, 1855, 1925 and 1955. Using these data for the rivers Shcherek, Zubra, Lug, Svirzh, Hnyla Lypa, Zolota Lypa, Koropets, Strypa, Dzhurin, Seret and Nichlava, the values of the bifurcation coefficients σ₀ and the length λ₀ were calculated for each of the time slices. The data obtained by us for 2020 were added to this information. This made it possible to study the dynamics of the values of the coefficients σ₀ and λ₀ over time. The structure of the river system, Podillya, under the influence of various factors of a natural and anthropogenic nature, changes over time. Serious structural transformations for the rivers of the Podilsky Upland begin at the end of the 19th century, when there is a decrease in the number of tributaries of various orders and changes in the total length of the river system.

Key words: river systems, river order, bifurcation coefficients σ₀ and lengths λ₀.

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Biryukov, O.V. (2024). Temporal changes in the structure of the river system of the Podilian highlands. Hidrolohiia, hidrokhimiia i hidroekolohiia [Hydrology, Hydrochemistry and Hydroecology], 3(73), 63-70 (in Ukrainian, abstr. in English). https://doi.org/10.17721/2306-5680.2024.3.6