| Popis: |
Drought indices are a suitable tool for management measures and dealing with the phenomenon of drought and are widely used worldwide. In this study, the drought indices of the SPI, CZI, ZSI, and MCZI in different monthly periods (1, 3, 6, 9, 12, 18, 24 and 48) and the DI and PNI in different monthly, seasonal and annual periods in Kurdistan Province (stations Saqqez, Qorveh, Bijar, Sanandaj) were evaluated. GLDAS and CRU precipitation data for 2000–2000 and TRMM precipitation for 2000–2000 were received, and the drought indices were calculated. RMSE, ME and Pearson and Spearman correlation coefficients were used for evaluation. The results of the SPI index showed that there is a significant relationship between TRMM, CRU and GLDAS at the Saqqez, Qorveh and Sanandaj stations (at the 5% level), and there is no significant relationship for TRMM at Bijar station for the 24-month period. The correlation coefficient results for the Saqqez and Sanandaj stations in periods of 1 to 9 months for the SPI, CZI, ZSI, and MCZI indices were better than those of the Bijar and Qorveh stations. In assessing the SPI and CZI drought indices, the highest RMSE was for GLDAS at Bijar station and for the 48-month period. In general, the results showed that the drought indices of the SPI, CZI, ZSI, MCZI, DI and PNI obtained from the TRMM satellite, CRU dataset and GLDAS model have a good correlation with the drought indices of synoptic stations. |
