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Spatio-temporal rainfall patterns and trends (1901–2015) across Visakhapatnam-Chennai Industrial Corridor, India

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Abstract

The study of rainfall trends and spatio-temporal evolution (patterns) helps in understanding and planning the utilization of water resources for diverse sectors of the economy, such as agriculture and industries, and also provides indications of climate change. The present study investigates trends and patterns of seasonal, half yearly, and annual rainfall over Visakhapatnam-Chennai Industrial Corridor (VCIC) using non-parametric Mann Kendall and Getis-Ord-Gi* statistics at a district level from 1901 to 2015. The annual rainfall trend for the entire VCIC region shows a significant positive trend at 90%, which is driven by a significant positive trend in monsoons. The intensity of spatial pattern differs across the seasons. However, the annual pattern shows an intensifying hot spot (23% of VCIC), oscillating hot spot (23%), and no pattern (18%). The positive trend in rainfall during monsoon seasons in north-eastern districts and post-monsoon seasons in the southern districts of VCIC has influenced the intensifying hot spot patterns. These trends and patterns are required for carrying out a climate risk assessment for various sectors like urban and industrial areas to plan and propose suitable adaptation measures to cope with extreme rainfall events.

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Cleaned data is available and raw data has been purchased from Indian Meteorological Department, India

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Acknowledgments

This is a part of ongoing doctoral research. The authors are very grateful to anonymous reviewers for providing constructive comments that have contributed to the improvements incorporated in the final version of this paper.

Funding

This research has not received any funding from any source. The cost of the research has been met by the researchers.

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All authors contributed to the study conception, planning and design. Data collection, material preparation, and analysis were performed by Hrishikesh Mahadev Rayadurgam. The first draft of the manuscript was written by Hrishikesh Mahadev Rayadurgam. Dr Prakash Rao contributed towards analysis and overall structure of the manuscript. All authors read and approved the final manuscript.

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Correspondence to Prakash Rao.

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Rayadurgam, H.M., Rao, P. Spatio-temporal rainfall patterns and trends (1901–2015) across Visakhapatnam-Chennai Industrial Corridor, India. Theor Appl Climatol 144, 1141–1159 (2021). https://doi.org/10.1007/s00704-021-03587-z

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  • DOI: https://doi.org/10.1007/s00704-021-03587-z

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