Comparison of Debris Flow Modeling Results with Empirical Formulas Applied to Russian Mountains Areas

Abstract

Construction of debris flow protection structures is impossible without studying the processes first. Therefore, the purpose of this research was to calculate the magnitude of debris flows in three study areas. Initial information was provided by JSC Sevkavgiprovodkhoz and the Research Center "Geodinamika". The first object of this research was the river Ardon and its tributary the Buddon, because of disastrous consequences for Mizur village of passed debris flows and floods. Modeling of unsteady water movement was carried out for estimation of potential flooding. During modeling, 5 cases of flash floods and debris flows of various probabilities from 0.5% to 1% percent were considered. Therefore, maximum floods for the cross-sections above and in the Mizur village itself were obtained. The second study area was the Chat-Bash stream, which is also situated in the north of Caucasus mountains. For this stream, the maximum discharge that could impact the mining complex at Tyrnyauz was determined. The third study area was the Krasnoselskaia river due to frequent floods in Yuzhno-Sakhalinsk. Applying three cases of various probabilities from 10% to 0.1%, the model determined maximum discharge and water level for the last cross-section above confluence into the Susuya river. Numerical experiments for all study areas with different roughness values were conducted to identify optimal ones. Comparing the model results for all study areas with empirical formulas (Golubcov V.V., Herheulidze I.I., Kkhann, Sribnyj and ASFS of EMERCOM of Russia) revealed that formulas contain only average depth slope angle and empirical coefficients and do not allow estimating flood areas and maximum characteristics of the event with a certain degree of accuracy.

Impact Containment Barriers with Geotextile Tubes

“…Several authors have described debris flows according to their sources in order to understand and characterize the materials and physical conditions of their mechanisms of action during an event: Costa (1988), Hungr (1995), Hungr et al (2001), Iverson and Denlinger (2001), Ornelas (2017), Grau Sacoto (2017), Kurovskaia et al (2020) and Takahashi (2019). The debris flow caused by the collapse of the tailings dam in Mariana-MG, Brazil, was recorded by Ornelas (2017).…”

Simulation and Prediction Algorithm for the Whole Process of Debris Flow Based on Multiple Data Integration

“…The dual-viscosity-regularized Bingham model was introduced to track and predict the movement trend of the free surface of debris flow. Viktoriia K et al calculated the scale of debris flow based on the simulation and prediction of debris-flow protection structures [16]. The modeling of unstable water motion was conducted.…”