Drought is aclimatic phenomenon that can occur in all climatic conditions and in all parts of the planet.But its effects and abundance appear more in dry and semi-dry zones.Drought monitoring is one of the key factors in drought management,especially in vulnerable areas.The purpose of this study was to evaluate the TRMM calibrated images and to prepare SPI maps.The purpose of this study was to evaluate the TRMM calibrated images in the preparation of SPI maps. For this purpose, SPI maps were prepared at intervals of 3,6,9 and 12 months. To evaluate these maps, the statistics of 14 stations were usedin the region.Aftercalculatingthe drought index by the stations data, the corresponding points of these stations were extracted from the SPI maps.To verify the validity of the maps, certain criteria for conformity were used such as the FAR and SR.By calculating the conformity index and comparing the drought categories, it was found that there is a very good agreement between the SPI index with satellite imagery and ground data. The SPI of the sixth and ninth month showed a conformity of more than 80%, while the SPI of the third and twelfth month showed conformities of 73% and 61%, respectively.
- حق عضویت دریافتی صرف حمایت از نشریات عضو و نگهداری، تکمیل و توسعه مگیران میشود.
- پرداخت حق اشتراک و دانلود مقالات اجازه بازنشر آن در سایر رسانههای چاپی و دیجیتال را به کاربر نمیدهد.