Debris flow relief of the Malaya Paipudyna basin (the Polar Ural Mountains)

A. I. Rudinskaya; Yu. R. Belyaev

doi:10.31857/S2949178923030088

Debris flow relief of the Malaya Paipudyna basin (the Polar Ural Mountains)

A. I. Rudinskaya, Yu. R. Belyaev

https://doi.org/10.31857/S2949178923030088

EDN: WDKBWN

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Abstract

We studied the debris f low relief of the Malaya Paipudyna basin, the Polar Ural Mountains. Based on the analysis of remote sensing data and field surveys, we established that 14 debris f low basins are located on the territory. We found traces of five slushflow occurrence in the streams in the spring of 2021. Typical landforms for different morphodynamic zones of debris f low basins were identified. The initiation zones of debris f lows are mainly represented by catchment funnels on the slopes of the Bolshoi and Maliy PaIpudynskii ranges. The transit zones V-shaped bottom incisions alternate with boxand trough-shaped transverse profile. Within the debris f low fans, two generations of accumulative debris f low relief are clearly distinguished. Young accumulation zones are represented by pebble-boulder ridges up to 0.5 m high, localized directly in the nearchannel areas of debris f low fans. Usually, they are either devoid of soil and vegetation cover, or are overgrown only by herbs. Ancient debris f low fans are triangular in shaped with convex transverse profile, consisting of a system of ridges and hollows, and overgrown with shrubs. The area of young accumulation zones for each debris f low basin is no more than 0.03 km2, the area of ancient accumulation zones is 0.4 km2. Debris f low fans are superimposed on the bottom of the trough valley of Malaya Paipudyna, which is mainly the surface of glacial accumulation. Probably, the formation of these fans began after the degradation of the last extensive glaciation of the territory. We calculated the morphometric features of the debris f low basins.

Keywords

debris f low, slushflow, debris f low relief, the Polar Ural Mountains

About the Authors

A. I. Rudinskaya

Institute of Geography RAS
Russian Federation

Moscow

Yu. R. Belyaev

Lomonosov Moscow State University
Russian Federation

Faculty of Geography

Moscow

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For citations:

Rudinskaya A.I., Belyaev Yu.R. Debris flow relief of the Malaya Paipudyna basin (the Polar Ural Mountains). Geomorfologiya i Paleogeografiya. 2023;54(3):14-25. (In Russ.) https://doi.org/10.31857/S2949178923030088. EDN: WDKBWN