EVALUATION OF DEBRIS FLOW DYNAMIC CHARACTERISTICS BY VIDEO MATERIALS
For mud dams construction it is necessary to clarify characteristics of debris flow such as flow velocity and pressure on the barrier. Determining these characteristics often causes difficulties due to the fact that debris flow is rather rare event and constant monitoring of them is carried out at mud flow observation station stations, which are few worldwide. Currently large number of videos have appeared on the Internet that captures debris flow descent. This material can be used to obtain not only qualitative, but also quantitative characteristics of the debris flow. In cases, when it is possible to determine the scale and specific location of debris flow on a video, measuring its velocity and other characteristics is a workable task. This research present an attempt to quantify the debris flow velocity based on the video materials with the subsequent comparison of the results obtained using various methods. The object of our study was the debris flow that came down in Austria, in Firgen on August 4, 2012. The survey was carried out from several angles, which made it possible to select a section of the channel to measure the velocity of debris flow wave train. Calculation of flow velocity and pressure on the barrier was conducted by several methods developed by various researchers. Debris flow velocities measured on the video are minimum – 7,4 m/s, maximum - 10 m/s. Differences between calculated by various methods and measured on the video values range from 0,1 m/s to 4,8 m/s.
Aulitzky Н. The debris flows of Austria. Bulletin of the International Association of Engineering Geology (Bulle-tin de l'Association Internationale de Géologie de l'Ingé-nieur), 1989, vol. 40, iss. 1, pp. 5-13. DOI: 10.1007/BF02590338
Golubtsov V.V. O gidravlicheskom soprotivlenii i for-mule dlya rascheta srednei skorosti techeniya gornykh rek [About the hydraulic resistance and a formula for calcula-tion of average speed of a current of the mountain rivers]. Trudy Kazakhskogo regional'nogo nauchno-issledovatel'skogo gidrometeorologicheskogo instituta [Transactions of the Kazakh Regional Hydrometeorologi-cal Research Institute], 1969, no. 33, pp. 30-41. (in Russian).
Gonor A.L., Pik-Pichak E.G. Chislennoe modelirovanie udara snezhnoi laviny po tverdoi stenke [Numerical mod-eling of snow avalanche impact on a solid wall]. Izvestiya Akademii nauk SSSR. Mekhanika zhidkosti i gaza [News of the USSR Academy of Sciences. Mechanics of fluid and gas], 1983, no. 6, pp. 86–91. (in Russian).
Hübl J. Event documentation, Volume 3: Annual review of events. IAN Report 150. Vienna, February 2013, 88 p. (in German).
Kazakov N.A. Volnovaya dinamika selei [Wave dynam-ics of debris flows]. Geoekologiya. Inzhenernaya geologi-ya. Gidrogeologiya. Geokriologiya. [Geoecology. Engi-neering geology. Hydrogeology. Geocryology], 2001, no 2, pp. 158-164. (in Russian).
Molzhigitov S.K. Otsenka udarnoi nagruzki selevogo potoka na poperechnuyu zhestkuyu pregradu [Estimation of the impact load of the mudflow on the transverse rigid barrier] Mezhdunarodnyi zhurnal prikladnykh i fundamen-tal'nykh issledovanii [International journal of applied and fundamental research], 2016, no. 3 (part 1), pp. 16-20. (in Russian; abstract in English).
Sribnyi M.F. Formula srednei skorosti techeniya rek i ikh gidravlicheskaya klassifikatsiya po soprotivleniyu dvizheniyu [Formula of the average flow velocity of riv-ers and their hydraulic classification by resistance to the movement] Issledovaniya i kompleksnoe ispol'zovanie vodnykh resursov [Researches and complex use of water resources]. Moscow: Publishing house of the USSR Academy of Science, 1960, pp. 204-220. (in Russian).
Vinogradov Yu.B. Etyudy o selevykh potokakh [Etudes about mud stream]. Leningrad, Gidrometeoizdat Publ., 1980. 144 p. (in Russian).
Vinogradova T.A., Vinogradov A.Y., 2017. The experi-mental debris flows in the Chemolgan river basin. Natural Hazards, Vol. 88, No. 1, pp. 189-198. DOI: 10.1007/s11069-017-2853-z
This work is licensed under a Creative Commons Attribution 4.0 International License.
Abstract views: 95 PDF Downloads: 24