Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2020, Vol. 17, No. 2, pp. 162-175
Analysis of ice situation on the Sukhona River (near the town of Veliky Ustyug) based on SAR imagery
P.G. Mikhaylyukova
1 , S.A. Agafonova
1 , N.L. Frolova
1 1 Lomonosov Moscow State University, Moscow, Россия
Accepted: 29.01.2020
DOI: 10.21046/2070-7401-2020-17-2-162-175
The paper discusses the conditions for the formation of ice cover on the Sukhona River near the town of Veliky Ustyug on the site of annual formation of powerful ice jams. Based on Sentinel-1B radar data, the ice situation was analyzed for two winter seasons, 2017/2018 and 2018/2019, which were found to differ significantly in the hydrometeorological conditions of ice cover formation. The graphs constructed for the three key sites (the village of Poldarsa, Kalikino and Veliky Ustyug town) displaying the time course of the reflected radar signal allowed us to identify the characteristic stages of the ice formation process, as well as to determine the presence of sagebrush and flooded sections of the riverbed. A series of longitudinal profiles with a length of 40 km served as the basis for analyzing the spatial and temporal variability of the ice cover on the Sukhona River during the winter seasons. Field work carried out in the study area in 2018 allowed assessing the determination accuracy of the state of the ice cover on the Sukhona River based on radar data. The results revealed that the ice cover in the 2018/2019 winter season was more homogeneous than that of the 2017/2018 winter season. We show that radar data are valuable for monitoring the state of the river ice cover to assess the likelihood of flooding of the surrounding area during spring break.
Keywords: river ice, Sukhona, Veliky Ustyug, SAR imagery, Sentinel-1
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