تغييرات مكاني الگوهاي توزيع فراواني بارش ايران زمين

Spatial Change in Frequency Pattern of Iran Precipitation

In this paper, precipitation variation and change has been described based on 92940 observed data of monthly precipitation during 1961-2003 all over the country and by geostatstic technique. Data analyses has done by GIS logic and software in order that some statistic such as coefficient of variation, skewness, kurtosis and long term trend overlaid and has achieved a changevariation map. In this map three regions is shown; one region that have no statistical significant change by 58.3 percent of country. The second is the high variation low extends region and finally low variation high extends region that covered about 41.7 percent ofiran