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Decadal Study of Changing Frequency and Intensity of Rainfall for Selected Locations of Tamil Nadu

S. Kokilavani * , SP. Ramanathan , GA. Dheebakaran , N.K. Sathyamoorthy , B. Arthirani , T. Ramesh , K. Sathyabama , M. Joseph , P. Balasubramanian and P. Arunkumar

Corresponding author Email: kokilavani.s@tnau.ac.in

DOI: http://dx.doi.org/10.12944/CWE.16.3.20

Understanding the pattern of regional climatic extremes is essential for creating an important adaptation measure to safeguard farmers from monsoon tantrums. This paper focuses on the rainfall variability and intensity for spatially different locations of Tamil Nadu. The daily rainfall data over a period of 30 years (1990-2019) for the study locations were collected from the constituent research centres of TNAU. The results indicated that an increasing trend in SWM rainfall was observed in Coimbatore (209.3 to 300.6mm), Ooty (681.4 to 703.1mm), Aduthurai (227.8 to 320.6mm), Kovilpatti (132.8 to 141.3 mm) while the decreasing trend was observed in rest of the places. A decreasing trend was reported in general for all the places during NEM. The decreasing trend in the number of rainy days was registered in Kovilpatti, Virudhunagar and Killikulam that exhibits an alert in modifying the crop planning programme in those areas. The frequency of rainfall intensity revealed that except Ooty, the number of Heavy Rain (HR) to VHR(VHR) was found to be meagre to absent in most of the study locations.

NEM; Rainfall; Rainy Days; Rainfall Intensity; SWM

Copy the following to cite this article:

Kokilavani S, Ramanathan S. P, Dheebakaran G. A, Sathyamoorthy N. K, Arthirani B, Ramesh T, Sathyabama K, Joseph M, Balasubramanian P, Arunkumar P. Decadal Study of Changing Frequency and Intensity of Rainfall for Selected Locations of Tamil Nadu. Curr World Environ 2021;16(3). DOI:http://dx.doi.org/10.12944/CWE.16.3.20

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Kokilavani S, Ramanathan S. P, Dheebakaran G. A, Sathyamoorthy N. K, Arthirani B, Ramesh T, Sathyabama K, Joseph M, Balasubramanian P, Arunkumar P. Decadal Study of Changing Frequency and Intensity of Rainfall for Selected Locations of Tamil Nadu. Curr World Environ 2021;16(3). Available From: https://bit.ly/3qtyj6q

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