The difference between slope debris-flows and landslides-streams
https://doi.org/10.31857/S0435428122010114
Abstract
Slope debris flows are widespread, despite this, they represent one of the poorly studied forms of material movement, and most cases of mudslides are interpreted as geodynamic processes that are genetically close to slope debris flows (erosion, landslides-flows, scree, etc.). Due to the erroneous identification of exogenous processes, the values of the ejection range, the area affected by the territory, the impact on obstacles and engineering protection structures are significantly underestimated, which often leads to their damage, destruction and inefficiency efficiency. Based on field observations at the sites of mass formation of slope debris flows in the territory of the Magadan region, Sakhalin Island and the Kuril Islands, the causes of the genetic connection of slope debris flows and other water-gravity and fluvial processes were established, the signs of their paragenesis were determined, including the joint nature of the flow, common foci of origin and solid nutrition, common conditions and factors of formation, mutual transformation. Slope debris flows and landslides-flows are considered as the closest geodynamic processes, their differences are revealed: different aggregate state, the nature of the movement of the solid phase in the flow, interaction with the underlying surface and obstacles. The paper describes the difficulties of identification during the reconnaissance survey of the territory of traces of debris flows and the movement of landslides-flows in the slope debris flow basins. The analysis of geobotanical features (the nature of wood damage and defects), interaction with the underlying surface and obstacles, and analysis of the shape and structure of sediments are proposed as the most reliable signs of identification of mudflow cases.
About the Author
S. V. Rybalchenko
Special Research Bureau for Automation of Marine Researchers, Far East Branch of RAS
Russian Federation
Russian Federation
Yuzhno-Sakhalinsk
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Review
For citations:
Rybalchenko S.V. The difference between slope debris-flows and landslides-streams. Geomorfologiya. 2022;53(2):61-71. (In Russ.) https://doi.org/10.31857/S0435428122010114
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