The DROUGHT RISK ASSESSMENT IN VIDARBHA REGION OF MAHARASHTRA, INDIA, USING STANDARDIZED PRECIPITATION INDEX
AbstractAbstract: Drought is a destructive hazard of nature. It is conceivably the most complex natural hazard. It shows a creeping appearance in nature. The impact of drought varies from region to region. It is difficult to define it in the most generalized way. It originates and crawls due to lack of precipitation over an extended period of time. Worldwide prevalence and duration of drought increases due to climate change and increasing water demands. Thus, the opulence of drought mitigation largely depends upon timely information on drought beginning, operation, and areal extent of drought. These kinds of information are better linked with drought monitoring. Monitoring is performed generally by using various indices. Various drought indices have been developed so far but many of them are region specific and have limitations of applicability in other climatic conditions. Moreover, the presence of multiple time steps in drought indices make it harder to decide the best time step to show the drought conditions. The present study aims to evaluate the Standardized Precipitation index (SPI) at 12 and 24 months timescale using monthly data of precipitation from 1953 to 2002 at eleven districts for monitoring drought years, in the Vidarbha region of Maharashtra, India. The Present study unveils the fact that Vidarbha region is associated with larger number of drought spells. Almost seven to eight numbers of dry periods have been observed in the data set from 1953-2002. Among the 11 districts namely Akola, Amravati, Bhandara, Buldhana, Chandrapur, Gadchiroli, Gondia, Nagpur, Wardha, Washim and Yavatmal, Nagpur is associated with severe drought in most of the years.
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