Assessment of Dendrogeomorphological Dating Methods of Past Geomorphic Processes in the Aktru Headwater (the Russian Altai Mountains)
https://doi.org/10.31857/S2587556621030110
Abstract
At the present, the dendrogeomorphological methods are widespread to date the past geomorphic processes. In areas that are poorly studied in this regard, they need to be tested for the effectiveness of their use. The article’s goal is to evaluate the dendrogeomorphological methods of the past geomorphic events dating in the Aktru headwater (the Severo-Chuisky Range, the Russian Altai Mountains). The peculiarities of the methods were considered, and their effectiveness was evaluated for dating the past debris flows and snow avalanches in the debris flow torrent and snow avalanche path. The injury and the radial increment dendroindications were main and anatomical (tree-rings saturated by resin) and age dendroindications were additional. The non-dendrogeomorphological methods of detection and dating of the past geomorphic events (eyewitnesses, soil profiles, radiocarbon analyses, etc.) appeared to be especially useful. The use of all these methods in a complex made it possible to increase both the past events detection and the accuracy and reliability of their dating. In the debris flow torrent, 13 events (6 debris flows, 5 snow avalanches, 1 wildfire, and 1 unidentified event) were dated during 220 years before the present. In the snow avalanche path, 20 avalanches were dated during 65 years before the present.
Supporting agencies: The study is supported by the state budget theme no. АААА-А17-117013050039-4. The authors thank numerous eyewitnesses of the debris flow and snow avalanche events in the Aktru headwater.
About the Authors
S. A. Nikolaeva
Institute of Monitoring of Climatic and Ecological Systems of the SB RAS
Russian Federation
Russian Federation
Tomsk
D. A. Savchuk
Institute of Monitoring of Climatic and Ecological Systems of the SB RAS
Russian Federation
Russian Federation
Tomsk
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Review
For citations:
Nikolaeva S.A., Savchuk D.A. Assessment of Dendrogeomorphological Dating Methods of Past Geomorphic Processes in the Aktru Headwater (the Russian Altai Mountains). Izvestiya Rossiiskoi Akademii Nauk. Seriya Geograficheskaya. 2021;85(3):392-404. (In Russ.) https://doi.org/10.31857/S2587556621030110
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