The introducing of natural dangers in Shafarude auriferousbasin of Rezvanshahr town.With emphasizing on land sliding

The main reason of doing this research is to identify and introduce the effectivefactors on natural disasters such as flood, land slide, fire accident ….and also thediversity of area and time of dangers and stretching and size of them in Shafarudeaquiferous basin of Rezvanshahr town located in the west of Guilan province. Theeffect of reflection of this dangers on the social-economics condition of residents is anoticeable point that shows the importance of this research. This research has done byusing the descriptive – analyzing methods (basin system) and by using from toolssuch as topography maps from organization of army forces and the maps of geology,land using, air mapping by organization of cartography and field observation (Directobservation) and by using the G.P.S device, Excel and Auto Cad soft wares.The study results showed that: the major threatening natural disasters in this basinareLand slide , flood , fire accident drought, Thunder and lightening, animals’ bite ,plant pests, ….. in this direction, type and genus of geological structure and the severalfaults inside the basin and the Astara throughout fault in basin shallow, the differenceof height between the headline and basin shallow, the steep of slopes, rain falling, thelasting snow (about six months), the blowing of strong winds in autumn and thebeginning of spring, the thick mantle of forest in throughout the basin and ….… arethe most important and numerous natural factors causing natural disasters in basinplay an essential role such as land sliding and rock falling(in northwest, centre andsouthwest of basin) in villages- Ardah(1383), Roshandeh(1375), Dashtdaman (1383)and the flooding in Pargam(1375), Rinah (1383), Vaskah (1373) and forest firing inthe forests of south and southwest of basin ( Razah, Dashtdaman) during the recentdecade(1375-85).The events of these dangers a part from economy and socialdamages, within the investigation boundary collectively have switched theenvironment landscapes.