Tyumentseva Ye. M.

The Modern State and the Dynamics of Minor Landforms Found in the Steppes of the Southern-Minusinsk Hollow” P. 139-148.

UDC 551.4:581.526.53(571.5)

DOI 10.37724/RSU.2021.72.3.014

Abstract. The article discusses the results of a multiannual research of the genesis, morphology, modern state and dynamics of minor landforms that can be found in the mountains of Southern Siberia in the Southern-Minusinsk Hollow. The majority of ravine landforms found in the area are bank gullies infesting the steep banks of the Abakan River, the Yenisei River and their tributaries. The density of ravine dismemberment increases in agricultural areas (arable lands and pastures) and in residential areas. The size of ravine landforms varies over a wide range. The length of short gullies does not exceed a few dozen meters. The length of long logs can reach 3–5 kilometres. The depth of incision varies from 1.5–3 metres to 10–20 metres. The distance between the brows of a ravine can reach 40–60 meters. Nowadays, despite a period of higher humidity, prolonged dry periods and high temperatures make ravines peaty. As a result, the areas overgrow with small-leaved elm and steppe landscapes are gradually transformed into parks.

Keywords: development dynamics, logs, nival niches, morphology, ravines, gullies, transformation, evolution.

 

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