Mushwani, H.; Hairan, M. H.; Sahak, K.; Arabzai, A.; Safi, L.; Ahmadzai, M. R.; Shirzai, H.; Hashmi, S. K.; Peroz, S. METEOROLOGICAL DROUGHT RISK ASSESSMENT USING SPI NUMERICAL MODEL: A CASE STUDY OF HELMAND RIVER BASIN, AFGHANISTAN. PM 2024, 22.