Method for measuring and calculating characteristics of breach of landslide and debris-flow dam and application thereof

The invention discloses a method for measuring and calculating characteristics of breaches of a landslide and debris-flow dam. Aiming at overcoming the deficiencies of the prior art that the method for measuring and calculating the average widths of the breaches of the landslide and debris-flow dam is not appropriate, and the residual heights of the breaches cannot be measured and calculated, theinvention provides a method for measuring and calculating the average widths and residual heights of the breaches of the landslide and debris-flow dam and the application thereof. The method for measuring and calculating the breaches of the landslide and debris-flow dam comprises the steps of: firstly obtaining basic data required in measurement and calculation through field investigation and measurement or sampling analysis, and then respectively calculating two characteristic values such as the average width and the residual height of each breach according to corresponding formulas. Based on the breakup mechanism an