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Rainfall Trend and Variability Analysis of Sub-Tropical Hills of Arunachal Pradesh in Northeastern Himalayan Region of India

Kaushik Bhagawati1*, Rupankar Bhagawati1, Amit Sen1, Kshitiz K Shukla1and Rajesh A Alone1

Corresponding author Email:kaushik.iasri@gmail.com

DOI:http://dx.doi.org/10.12944/CWE.11.2.35

The climate change especially the changes in rainfall pattern is most crucial for Himalayan region as it leads to changes in river runoff and consequently affecting environment, agricultural productivity and human livelihood downstream. Current study aims to evaluate the rainfall trend and variability in the highest rainfall recipient sub-tropical hill regions of Arunachal Pradesh in Northeastern Himalayan region of India. Sen’s estimator is used for trend analysis and Mann-Kendall test to determine significance of the trend. The 37 years (1979-2015) data reveals no clear and consistent trend of average annual rainfall. But a wide inter and intra seasonal variation in the monthly rainfall has been observed. Also a significant shift in rainfall during pre-monsoon and Southwest monsoon was noticed leading to change in forest and agricultural growing seasons, mid-season dry spell during July and increase in extreme rainfall events during August, September and October. The trend analysis of rainfall will help in prediction of future climate scenarios in this Himalayan region and to understand the impact of climate change.


Climate Change; Rainfall trends; Arunachal Pradesh; Northeastern Himalaya; Sens Estimator

Copy the following to cite this article:

Bhagawati K, Bhagawati R, Sen A, Shukla K. K, Alone R. A. Rainfall Trend and Variability Analysis of Sub-Tropical Hills of Arunachal Pradesh in Northeastern Himalayan Region of India. Curr World Environ 2016;11(2) DOI:http://dx.doi.org/10.12944/CWE.11.2.35

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Bhagawati K, Bhagawati R, Sen A, Shukla K. K, Alone R. A. Rainfall Trend and Variability Analysis of Sub-Tropical Hills of Arunachal Pradesh in Northeastern Himalayan Region of India. Curr World Environ 2016;11(2). Available from://www.a-i-l-s-a.com?p=954/