بررسي كارايي روش هاي زمين آمار به منظور پهنه بندي اقليمي استان اصفهان با استفاده از روش دومارتن

The Study of Geostatistics Methods for Climate hazarding by Domarten Method in Esfahan Province

The goal of this research was climatic zoning of Esfahan province using Domarten and geostatistic methods. We used 30 years data of 35 climatologically stations. At first we calculated Domartan aridity index of climatological stations using mean annual precipitation and temperature. In order to climatic zoning, Kriging, Cokriging and IDW with powers of 1 to 5 were used. After normalization, the variogram were drawn. To fit the best model on empirical variogram, the lowest values of RSS were applied. Highly correlated values of precipitation with Domarten index were used in Cokriging method. For selection of the best interpolation method, cross validation and RMSE were considered and errors were calculated. Cokriging has the lowest error .Using cokriging and GIS, climatic zoning map of Esfahan province were prepared. Climatic zoning map showed that 80 % of studied area has arid and semi-arid climate