Determining the rate of drought meteorological and hydrological condition in Kerman province

Although kerman, as a part of Iran Plateu, has a dry to very dry climate, few changes happen in its climate due to some factors including height, humidity and weather fronts enter this region; in this case, dry and rarely mediterianian climates can be seen in heights of Lalehzar and Jabalbarez Mountains. To determine metropoligical drought, Kerman Province has been divided into suitable sub-basins and Regional Evaluation Statistical Distribution Method has been used. Moreover, Regional Evaluation has been examined using Standard Distribution Index, arithmetical mean and ratio median.In this survey Rainfall stations with suitable distribution with a long period of meteorological drought statistics between 1968-2007 for 39 years are selected.the surveys showed that the drought period in Kerman is longer that wet year period.More over by selecting 4 index hydrometry stations with acceptable statistics and generalizing to four region of Kavir lut,Jazmorian,Daranjir desert,Sirjan Abarghoo desert were determined.Since the 1999-2000 Kerman region entered drought hydrological situation that continued till 2007-08 and the surface runoff production inadequancy rate to the long period.average were determined to 18 billion cubic meters, and the years of 1968-69, 1999-2000, 2005- 06, 2007-08 were the driest years and in most years, some portious of state had beared some drought with different return period.