Calculation of Seasonal Erosion on the Oka River Riverbanks Using Geodetic Modeling-Reference-Cited by-同舟云学术

Calculation of Seasonal Erosion on the Oka River Riverbanks Using Geodetic Modeling

Published:2023-03-01 Issue:2 Volume:155 Page:25-43
ISSN:0869-6071
Container-title:Известия Русского географического общества
language:
Short-container-title:Izvestiâ Russkogo geografičeskogo obŝestva

Author:

Vorob’ev A. Ju.¹,Kadyrov A. S.¹,Lokteev D. S.²,Burgov E. V.³,Balobina A. A.¹

Affiliation:

1. Ryazan State University named for S. Yesenin

2. Moscow State University of Geodesy and Cartography (MIIGAiK)

3. Institute of Ecology and evolution A.N. Severtsov of the Russian Academy of Sciences

Abstract

Abstract—Directed erosion of riverbanks stands out among the dangerous geomorphological processes on large lowland rivers. In the middle reaches of the Oka river, horizontal channel deformations make a significant contribution to regional lithodynamics and the reduction in the area of floodplain lands. We carried out field geological and geomorphological studies in the valley of this large tributary of the Volga, which revealed the complex facies architecture of the floodplain. The forecast for riverbank erosion near the city of Ryazan has recently declined due to the unstable water regime of the Oka river. For a detailed assessment of the consequences of destabilization of the coastal slopes, their surface was surveyed using a total station and aerial photography from a UAV. Regular observations of erosion by the seasons of the hydrological year allowed us to obtain actual data on the redistribution of soils along the height of the slope. We have found that erosion in summer low water is three times weaker than during high water. The predominance of collapses of the uppermost (0.0–2.0 m from the day surface) part of the erosion fronts was also revealed. The article also discusses possible reasons for the mobilization of the geological filling of the river bank, arising from local differences in the Pleistocene-Holocene evolution of the morpholithic system of the Oka river floodplain and the fixation of geological information in it.

Publisher

The Russian Academy of Sciences

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