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Temporal and spatial trend analysis of rainfall on Bhogavo River watersheds in Sabarmati lower basin of Gujarat, India

  • Research Article - Atmospheric & Space Sciences
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Abstract

Global warming is a biggest issue around the world. In this research paper, the temporal and spatial trend analysis of seasonal and annual rainfall on Bhogavo River watersheds in Sabarmati lower basin of Gujarat state of India has been analysed using the data of 11 rain gauge stations installed in Bhogavo watershed. Linear regression, Mann–Kendall Test, Sen’s slope test and innovative trend analysis methods are used to carry out monthly and annual rainfall trend analysis. In addition to the rainfall analysis, a number of rainy days change in magnitude as a percentage of mean rainfall have also been analysed using linear regression and Sen’s slope method, respectively. The IDW method is used to develop a spatial distribution of annual and seasonal rainfall trend over the study area. From the results, it is concluded that annual rainfall shown increasing (positive) trend at nine stations out of 11 stations. The highest value of change in magnitude of trend as a percentage of mean monthly rainfall has been obtained in the month of July, attributing increasing trend at Sayla station and lowest value magnitude of trend as a percentage of mean rainfall in the monthly rainfall has been obtained in the month of August, attributing decreasing trend at Bavla station.

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Acknowledgements

Thanks to State Water Data Centre (SWDC) of Gujarat for providing the necessary data related to the study area. Also, thanks to the water resources and Kalpasar department, Gujarat, for providing the basic information about the study area.

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Authors and Affiliations

Authors

Contributions

Pratik Patel contributed to writing—original draft preparation, software and data analysis; Geeta S. Joshi and Shilpesh Rana contributed to writing—review and editing, supervision and validation; Geeta S. Joshi contributed to conceptualization and methodology; Geeta S. Joshi, Shilpesh Rana and Pratik Patel contributed to formal analysis and investigation. All authors have read and agreed to the published version of the manuscript.

Corresponding author

Correspondence to Shilpesh C. Rana.

Additional information

Communicated by Theodore Karacostas, Prof. (CO-EDITOR-IN-CHIEF).

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Patel, P.S., Rana, S.C. & Joshi, G.S. Temporal and spatial trend analysis of rainfall on Bhogavo River watersheds in Sabarmati lower basin of Gujarat, India. Acta Geophys. 69, 353–364 (2021). https://doi.org/10.1007/s11600-020-00520-2

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  • DOI: https://doi.org/10.1007/s11600-020-00520-2

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