تحلیل وضعیت خشکسالی در عرصه جنگل های زاگرس در استان کردستان

Examination of precipitation indices revealing the occurrence of climate change showed; Annual precipitation fluctuates widely. The study of drought incidence in 3-month, 6-month and 12-month time scales showed that the frequency and severity of drought was higher in the second half of the time series used, but the highest continuity occurred in the first half and in the period 1999 to 2002. At all time scales, the frequency of severe drought is higher than the SPEI index at all demolition monitoring sites based on the SPI index. In all scales and in all degradation monitoring sites, the total frequency of drought occurrence based on SPEI index is higher than the frequency of drought occurrence based on SPI index. In all scales and in all decline monitoring sites, the longest drought continuity in 1999 to 2002 is the year of the beginning of the decline phenomenon (2001) in the whole Zagros and including the study area.