Analysis of precipitation for the past 20th century and its multi-decadal oscillation: a case study of Bankura Town, Bankura, West Bengal

Abstract

The present investigation is based on maximum monthly precipitation for the past 20th century of Bankura Town, of West Bengal. The analysis was based on 100 years time series of maximum monthly rainfall data of Bankura Town. First of all, data sets were analysed as a whole and in a separated part of it using Linear Regression model. We have found that there were no such good relationships or trends do exist at all. But using 30 years of moving average, we have found oscillatory trends within this data, which seems to be very much effective in understanding and dealing with precipitation trends. This study concluded that precipitation trends oscillatory must be used for analyse of the past.