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Comparative study of evapo-transpiration and rainfall analysis of Pollachi watershed in Coimbatore, Tamil Nadu, India

Meiaraj, C.; Jeyapriya, S. P.

Indian Journal of Geo-Marine Sciences 48(6): 853-856

2019


ISSN/ISBN: 0379-5136
Accession: 070969268

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The present study was about the analysis of rainfall data and estimation of evapo-transpiration values for the predominant crops in Pollachi watershed area. The average monthly rainfall data for the period of 10 years (2004-2013) of Pollachi region of Coimbatore district inferred that the 46% of rainfall is received during south-west monsoon and 34% of rainfall is received from north-east monsoon seasons. From the comparative study of evapo-transpiration, it is observed that the value found out by the Penman method is low and the value obtained by the Hargreaves class A pan evaporation method is high. From the study, it is suggested that Penman method is most suitable for evapo-transpiration estimation.

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