Банщикова et al. (2025) Особенности формирования зажоров и заторов льда на реке Вага

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Identification

• Journal: Гидросфера. Опасные процессы и явления.
• Year: 2025
• Date: 2025-11-20
• Authors: Л.С. Банщикова, А.Э. Сумачев, С. А. Агафонова
• DOI: 10.34753/hs.2025.7.2.128

Research Groups

Not specified in the provided text.

Short Summary

This study investigates the conditions and long-term variability of ice jam and ice dam formation on the Vaga River, revealing that these phenomena are annual occurrences with consistent formation locations, and while ice dams are short-lived, ice jams can persist for months and sometimes cause dangerous water level rises.

Objective

• To examine the conditions for the formation of ice jams and ice dams on the Vaga River and their variability over a long-term period.

Study Configuration

• Spatial Scale: Vaga River, focusing on specific sections prone to ice accumulation (river bends, upstream ends of islands, narrowings, river mouth, and locations of Shenkursk and Pasva hydrological posts).
• Temporal Scale: Long-term period (multi-year analysis); individual ice dam events lasting up to several months; individual ice jam events lasting typically 1-2 days.

Methodology and Data

• Models used: No explicit models were used; analysis was based on observational data and spatial-temporal graphs of water levels.
• Data sources: Hydrological post observations (daily water levels, ice conditions), cartographic materials, archival materials, satellite images, and navigation charts.

Main Results

• The formation of ice jams and ice dams is an integral and almost annual part of the Vaga River's ice regime.
• Water level rises caused by ice dams generally do not exceed dangerous or unfavorable levels.
• Ice jam-induced water level rises at the Shenkursk and Pasva posts can exceed dangerous or unfavorable levels in some years.
• Ice jam water level rises are typically small compared to spring flood levels and usually occur during the rising phase of spring floods.
• The locations of ice jam and ice dam formation are constant over the long term, primarily occurring at river bends, upstream ends of islands, river narrowings, and at the mouth of the Vaga River.
• Ice dams can persist for several months, whereas ice jams on the Vaga River are short-lived, lasting on average no more than 1-2 days.
• Ice jams are localized; the destruction of one jam typically does not lead to the formation of another downstream.
• Inconsistent river opening (against the current) can lead to ice jam formation at the edge of the ice cover.
• If the Northern Dvina River opens later, ice jams tend to form at the mouth of the Vaga River.

Contributions

• Provides a comprehensive analysis of the long-term variability and specific conditions for ice jam and ice dam formation on the Vaga River.
• Identifies consistent geographical locations prone to these phenomena, linking them to river morphology.
• Differentiates the duration and potential impact on water levels between ice jams and ice dams.
• Highlights the influence of regional hydrological conditions, such as the opening sequence of the Northern Dvina River, on ice jam formation in the Vaga River's mouth section.

Funding

Not specified in the provided text.

Citation

@article{Банщикова2025Особенности,
  author = {Банщикова, Л.С. and Сумачев, А.Э. and Агафонова, С. А.},
  title = {Особенности формирования зажоров и заторов льда на реке Вага},
  journal = {Гидросфера. Опасные процессы и явления.},
  year = {2025},
  doi = {10.34753/hs.2025.7.2.128},
  url = {https://doi.org/10.34753/hs.2025.7.2.128}
}