A Modeling of Mass Movement Hazard, Case Study: Taleghan Drainage Catchment

The aim in this research was to initially study and determine the factors affecting mass movement
through literature review, then by further investigation find the specific factors that are most effective
in mass movement in the study area. A time interval of years 1966 to;2000 was employed. A study of
change in factors during this interval, area affected by mass movement ,arid field surveys to check for
accuracy of data were carried out. The resulting tables and statistical results were used in a later phase
of investigation.
In the latter phase, it was found that traditional statistical tests for structuring a simple model usable for landslide hazard are not applicable due to •.the J act t hat • the effective factors used are qualitative.
Therefore, another method, called systematic hierarchal analysis, was employed, and on the basis of
oral as well as descriptive standards, coefficient ? was obtained for each factor . Then for each factor,
new values were obtained through multiplication by the factor coefficient. were added to reach a final
value. By classifying this value; the ranges of mass movement hazard 'were obtained in four different
classes in the region.