Morphodynamic Transformations of the Tysa River Channel across the Volcanic Carpathians over the Period 1880–2025 (Ukraine)
Morphodynamic Transformations of the Tysa River Channel across the Volcanic Carpathians over the Period 1880–2025 (Ukraine)

Summary/Abstract: This study investigates the morphodynamics of the Tysa River channel over a 145-year period along a valley segment that intersects the Vyhorlat-Hutyn Volcanic Ridge. This section is characterized by minimal anthropogenic alterations and exhibits natural variability in channel types, including single-thread, multi-thread, and braided configurations, as well as straight, slightly sinuous, and meandering forms. Our analysis revealed that in the late 19th and early 20th centuries, multi-thread sinuous channels predominated. Since the 1980s, they have largely transformed into single-thread meandering channels. By the early 21st century, only single-thread forms were present, with slightly sinuous types being the most common, followed by meandering and straight reaches. Since 2020, single-thread meandering channels have become dominant. The study identifies a cyclic pattern in the transformation of channel morphological types, with a recurrence to initial states observed on approximately 40–50 and 100-year intervals.

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