Analysis of Climatical Drought on the Increases of the Hazard of Sand Movment in Aran and Bidgol Area

One of the main tasks of applied Geomorphology is study of position and of vulnerable human environmentconfronting to variety of geomorphological hazards. hazards due to migration of sands and sand dunes isconsidered as one of the most prominent geomorphological hazard in arid regions which in addition of harmingagricultural function, buildings, cultivated lands, pipe line and transportation net works, in being buried by thesands of Psychology creates serious problems, Therefore Climatical Drought and its consequences haveeffective role in intensification of occurrence of migration of sands hazard. In fact the area and its suburb isone of the area with frequent occurrence of climatic drought. these area turns to one of the most suceptable aridregions to sands migration hazards. then owing to the main target of research in first step, we calculate themain existing factors of climatic drought such as RAI, RDI PN, SMDI, SPI in the study area. in the next step,using statistical analysis (Kendal and spear man correlation coefficient), to evaluate the effect and correlationbetween occurrence of drought and increase of hazard due to the migration sands was studied . Finally, resultsshow field worked help us to make a comprehensive overview hazard in the study area and migration of sanddunes, in this study area. Furthermore, with periodic increasing degree of climatical Drought, also percent offrequency of sands occurrence, represent a relative increase, as the result we can predict and reduce occurrenceof these kind of hazard and have more readiness in environmental management by appropriate planning tocondition of the zone and exact calculation.

کلیدواژه ها:

Geomorphological hazards ، migration of sands hazard ، Climatical Drought ، sand dunes ، Aran and Bidgol