Empirical Calculations of Snow–Avalanche Run–out Distance Based on Topographic Parameters

摘要: A method for calculation of “maximum” avalanche run–out distance based on topographic parameters only is described. 423 well–known avalanches have had their maximum extent registered. The average gradient path (α–angle), measured between the highest point rupture and outer end deposit used as description run–out. which determine α are regression analysis 111 paths 8 terrain performed, applying 26 independent combinations these variables. four best variables used. These are: second derivative y’’ slope described by a second–degree function, track β, total vertical displacement H, zone θ. equation has correlation coefficient 0.95 standard deviation 2.3°. This relationship makes possible fairly accurate prediction distance.