Climate change nowadays becomes major challenge for water resources management. Global warming threaten the hydrological cycle, resulting in dryer dry seasons and wetter rainy seasons, subsequently heightened risks of more extreme, longer and frequent floods and droughts. Drought is considered to be the complex natural hazards, affecting more people than any other hazard. Defining drought is difficult as it depends on differences in regions, needs and disciplinary perspectives. In water resources perspective drought can be broadly classified as meteorological drought, agricultural drought and...