Department of Surveying and Geomatics Engineering;
Faculty of Engineering;
Tishk International University;
Erbil 44001;
Iraq;
Department of Forestry;
College of Agricultural Engineering Sciences;
Salahaddin University;
Erbil 44002;
Iraq;
Geodesy and Geomatics Division;
Department of Civil;
Constructional and Environmental Engineering;
Sapienza University of Rome;
Rome 00185;
Italy;
Sapienza School for Advanced Studies;
Sapienza University of Rome;
Rome 00185;
Italy;
climate change; drought; Normalized Difference Vegetation Index(NDVI); Normalized Difference Water Index(NDWI); Standardized Precipitation Index(SPI); delay effect;