Abstract
The persistent situation of a drought in a specific geographical zone harms the economic, climatic, societal, and various other environmental issues associated with its habitat. Since the last decade, there have been various attempts to study and find an effective solution for overcoming drought situations. In most studies, the standard precipitation index (SPI) is a prime indicator to study drought. The present study considers a case study of 35 meteorological stations of Belagavi district, Karnataka, India. It presents a comprehensive statistical analysis to examine the severity due to the drought conditions. The complete analysis has been carried out considering standard performance metrics over the considered area's climatic data. Also, an attempt has been made to develop a relationship between SPI and PCI, which can act as proxy to compute the drought index and for monitoring the presence of drought in an area. The proposed study contributes towards giving the true picture of drought, which can assist the planners and managers in taking pre-emptive measures to overcome the situation.
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Acknowledgements
The authors are thankful to the Department of Directorate of Economics and Statistics for providing the data products and to the National Institute of Hydrology, Hard Rock region, Belagavi, Ministry of Jal Shakti and Ganga rejuvenation, Govt. of India, where the complete analysis and modelling work was carried out. Authors express sincere thanks to all who are responsible for the modification, correction and revision of the manuscript. We are also thankful to Dr M K Jose Scientist, National Institute of Hydrology for his suggestions.
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A L Bharath undertook data collection, statistical analysis, drought assessment by SPI, drought indices in different scales and rainfall anomaly index and interpretation of results, modelling and drafting of the original manuscript. B Venkatesh undertook conceptualisation of the work, relation between PCI vs. drought modelling work, and finally, revision and improvisation of the original manuscript.
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Communicated by Kavirajan Rajendran
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Bharath, A.L., Venkatesh, B. Long term drought, trend analysis, and homogeneity analysis for the Belagavi district, Karnataka. J Earth Syst Sci 131, 238 (2022). https://doi.org/10.1007/s12040-022-01980-4
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DOI: https://doi.org/10.1007/s12040-022-01980-4