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Purpose: to make a semi-quantitative assessment of mudflow risk based on empirical data on mudflows and the consequences of their collapse, obtained during the work at the construction and reconstruction of the Lgovskoe – Grushevka – Sudak highway on the territory of the Republic of Crimea and to develop recommendations on state stabilization, based on the assessment results. Materials and methods. The initial data on mudflows are divided into three groups, for each a step-by-step calculation was performed and points were assigned. The criteria by which the assessment has been made: the level of mudflow hazard and the amount of damage, the dependence of the amount of damage on the protective structures’ state. Calculated indicators such as mudflow velocity, flow rate, etc. have also been determined. Each group is assigned a mudflow risk category based on the results of scoring, taking into account their significance. Results. According to the results of the study, the total score for the third group is 15.18, which corresponds to the second category of mudflow risk, which is characterized by a high probability of significant damage. For the first and second groups, the total score is 9.88 and 11.34, respectively, thus, both groups fall within the boundaries of the third category of mudflow hazard. Conclusions. A semi-quantitative assessment of mudflow risk allows identifying potentially dangerous areas, informing on the threat and taking measures for land protection in advance. In order to protect lands from the destructive power of mudflows within the boundaries of the basins of the third group, it is necessary to erect mudflow protection structures, namely: agroforestry-reclamation erosion protection structures, mudflow retention, mudflow passage, mudflow-preventing structures and other engineering protection facilities of the territory. |
