Standardized Precipitation Index (SPI) has been widely used for evaluation of drought. Different time scales of SPI could be used e.g., 3, 6, 9, 12, 18, 24 and 48-months. SPI 12-month is used for evaluation of drought condition and vulnerability of drought in the study area. SPI 12-month was computed in 28 stations based on 30 years of data period in the study area. Spatial distribution of SPI 12-month was analyzed using different interpolation techniques of geostatistics. The precise interpolation technique was selected based on the cross-validation criteria. In order to access vulnerability of the study area in drought, two years were selected as end-members (1378-79 and 1377-78 for minimum and maximum precipitation, respectively) and 1376-77 was selected as average climatological condition due to annual precipitation values. The results show that in extreme year (1377-78), more than 99٪ of the study area leave from the drought condition. However in minimum condition of annual precipitation (1378-79), more than 98٪ of the study area belongs to drought. As a results, Yazd, Taft, Mehriz, Bafgh, Naibandan and Kharanagh show high vulnerability to drought in the Yazd Province.
n, A., & m, Z. (2014). Vulnerability of Yazd Province in Drought Using Standardized Precipitation Index and Geostatistical Methods. Water Resources Engineering, 7(20), 79-90.
MLA
a. n; z. m. "Vulnerability of Yazd Province in Drought Using Standardized Precipitation Index and Geostatistical Methods". Water Resources Engineering, 7, 20, 2014, 79-90.
HARVARD
n, A., m, Z. (2014). 'Vulnerability of Yazd Province in Drought Using Standardized Precipitation Index and Geostatistical Methods', Water Resources Engineering, 7(20), pp. 79-90.
VANCOUVER
n, A., m, Z. Vulnerability of Yazd Province in Drought Using Standardized Precipitation Index and Geostatistical Methods. Water Resources Engineering, 2014; 7(20): 79-90.
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