Acknowledgements
The authors acknowledge the core team of the R statistical software for providing suite of functionalities. This work was conducted with support from the ongoing Russian Science Foundation project No. 19-17-00181: “Quantitative assessment of the slope sediment flux and its changes in the Holocene for the Caucasus mountain rivers.” This study contributes to the State Task no. 0148- 2019-0005, Institute of Geography RAS.