Investigation of Statistical Analysis Methods Climatical Drought in East and South – East of Iran.
2005
Daneshvar, Mohammad Reza | Telva`i, Abdolrasol | Dana`iyan, Mohammad Reza | Tavakkoly, Mahmoud
Drought is one of the natural disasters that creats some of damaging impacts to ecological environments. the Average annual and monthly rainfall of limited projects. Stations were surveyed in a statistical periods 30 years ( 1970-1999) to analyze droughts of south and south – east of our country. At first the average annual rainfall was estimated in a drought period according to statistical rules and best selected distribution. Then the map of chosen area was provide based on the estimated rain fall rate to average annual each station for return priod (P P MEAN) Using indeses of Z-score , normal percent and diversion of mean annual monthly 3 months, 6 month and 18 month scales, drought intensity was analized. the located maps of three indeses in dry years were drawn. With using the moving average of 5 and 7 years of main annual rainfall index (Z-score) the wet and dry periods were surveyed, and graphs were drown.
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