Investigation Spatial Variation of Drought using Geostatistics Methods and Z Index in Kerman Province

Drought is a weather phenomenon that probability of occurrence in all parts of the planet and the climate there is any. Drought Phenomenon is one of the most important disasters that infect on many of countries. Drought causes many problems as Economic, Social, political and Cultural. The monitoring systems is developing plans to deal with drought and its management are important. Knowledge about drought, prediction and zoning of drought severity can decrease the damages of these phenomena. In this study Kerman province is selected. The aim of this study is the accuracy evaluation of Kriging, Co-kriging and Inverse Distance Weights methods in providing of maps of severity drought in Kerman province by Z Index. In do this, 44 meteorological station base time common years are selected. Z Index computed. Drought zoning maps provide by three methods of Kriging, Co-kriging and Inverse Distance Weights to years 1367, 1372, 1378, 1379, 1381 and 1384. Between of three methods of zoning, Kriging method has the lowest error RMSE so is the best methods. Results of this research was showed most severity drought occur to year 1378 and 1379.Key Words: