Spatio-temporal Trends of Rainfall and Rainy Days in Konkan Region of Maharashtra


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Authors

  • U S KADAM Dept. of Irrigation and Drainage Engineering,College of Agricultural Engineering and TechnologyDr. B.S. Konkan Krishi Vidyapeeth, Dapoli- 415 712, Maharashtra
  • S H JEDHE Dept. of Irrigation and Drainage Engineering,College of Agricultural Engineering and TechnologyDr. B.S. Konkan Krishi Vidyapeeth, Dapoli- 415 712, Maharashtra
  • M S MANE Dept. of Irrigation and Drainage Engineering,College of Agricultural Engineering and TechnologyDr. B.S. Konkan Krishi Vidyapeeth, Dapoli- 415712, Maharashtra
  • D M MAHALE Dept. of Soil and Water Conservation Engineering,College of Agricultural Engineering and TechnologyDr. B.S. Konkan Krishi Vidyapeeth, Dapoli- 415712, Maharashtra
  • S B NANDGUDE Dept. of Soil and Water Conservation Engineering,College of Agricultural Engineering and TechnologyDr. B.S. Konkan Krishi Vidyapeeth, Dapoli- 415712, Maharashtra

Keywords:

Konkan, Mann-Kendall, Rainfall, Rainy days, Sen’s slope, Trend analysis

Abstract


The present study aimed to carry out the spatial and temporal trend analysis of annual, seasonal and monthly rainfall and rainy days in the Konkan region of Maharashtra state. Trend analysis was performed for rainfall and rainy days observed at twelve different locations spread over the region. Mann Kendall and Sen’s slope test were used to know the nature of trend and its magnitude, respectively and results were tested at 90, 95 and 99% confidence levels. Results showed that significant increasing trend in rainfall ranging from 26.23 to 38.27 mm yr-1 was observed at Suksale, Mulde and Bhatsanagar. A decreasing non-significant trend was observed at Karjat and Awalegaon while at remaining locations a non significant increasing trend in annual average rainfall was observed. In most locations the number of rainy days was found to exhibit an increasing non significant trend and only at Wakawali the number of rainy days was significantly increasing @ 0.25 days yr-1. At Karjat and Pali a non-significant decreasing trend in rainy days was observed. Results also illustrated significant trends in monthly rainfall during August, September, November and December. Monthly rainy days also exhibited significant change during May, July, August, September, October and November. Overall, the changes in annual rainfall amount and rainy days were observed in the region. These changes may have further influence on water resource availability for agriculture in the region.

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Submitted

2019-08-03

Published

2019-06-30

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How to Cite

KADAM, U. S., JEDHE, S. H., MANE, M. S., MAHALE, D. M., & NANDGUDE, S. B. (2019). Spatio-temporal Trends of Rainfall and Rainy Days in Konkan Region of Maharashtra. Journal of the Indian Society of Coastal Agricultural Research, 37(1), 25-36. https://epubs.icar.org.in/index.php/JISCAR/article/view/92410