Recognition the Factors Affecting the Distribution and Occurrence of Sinkholes in the Region of Kermanshah Gazorkhani by Using Logistic Regression

In This study, the factors controlling sinkholes and karst sinkholes morphometry were studied. The most popular form of karst in the study area was sinkholes. The first step in understanding karst forms and the factors controlling the evolution of sinkholes is morphometry (morphometric). 200 sinkholes were identified in the study area using field work and 1:25000 digital topographic maps and digital elevation model (DEM 10 m).For each sinkhole various parameters, including depth, area, major and minor axis, major axis orientation and faults, pitting index (the amount of cavitation), Also the sinkhole density map was prepared. The results showed that the sinkhole in the study area had simple, compound and complex forms. The results also showed that in the slope>20 there was no sinkhole. The results of logistic regression showed the fault, elevation and rainfall were the most important controlling factors in sinkhole events.