Calculation of Anthropogenic Mudflows Parameters in the Dumps of the Listvennichnyi Quarry (Sakhalin Island)

Abstract This paper considers the mudflow activation in the dumps of the Listvennichnyi quarry near the city of Yuzhno-Sakhalinsk. Eight cases of anthropogenic mudflows initiated by rainfalls were recorded during field observations conducted from May to November in 2020. In a first for Sakhalin, mudflows were recorded by video equipment. The mudflows parameters were measured during the mudflows occurrences. Velocity values were obtained for six mudflows and compared with those calculated by different methods. The mudflow pressure was also calculated for all six flows. The derived values were in the range between 0.0044 and 0.0089 MPa. Different methods for the assessment of mudflow effects on objects depending on the pressure value were compared. The amount of precipitation sufficient for triggering anthropogenic mudflows is provided in this paper.