برآورد روابط رياضي بين فاكتورهاي حجم و مساحت لغزش توده اي در گردنه صائين (شهرستان نير)

Stimating the mathematical Relations…

Calculating of landslides show between of area of favorable region for landslide and volume landslide has meaningful relation. Landslide in deferent condition and deferent climate happened. Furthermore have meaningful relation between volume and area of landslide. This relation used for determine landslide volume in sain pass in nir city with area 77.8km. in this research landslide time series 4 years since 1380 to 1385 are used. Total volume of material mobility of landslide in this period VLT = 3.2x 107m3and speed of material mobility have jL = 7.8mmyr- . Humid period 1383 to 1385 lead to accelerate occurs of landslide in this region. In this three years, approximately2.1 x 107 total of slipped material before this years in sain pass mobility and the speed has (pL = 54mmyr-1 six times bigger then standard speed. Volume of material slipper in definite period has indicated for magnitude of landslide is used and in the calculating in the shape of log 10 are show and represent total volume of landslide in the clear period. In notice this subject new relation between area(AL) and volume(VL) start point for grading magnitude of landslides.