Vol. 8, Special Issue 2 (2020)
Trend analysis of monsoon season monthly rainfall of Nagwan watershed
Author(s): Ghanshyam Panwar and Vivek Kumar
Abstract: The daily rainfall data for a period of 32 years from 1983-2014 of gauging station located in Nagwan watershed of Hazaribagh, Jharkhand were analyzed to study variation of monsoon months and monsoon season rainfall distribution pattern and its trend. The monsoon months and monsoon season rainfall series from daily data were developed. The mean, standard deviation, coefficient of variation, coefficient of skewness and kurtosis of monsoon months and monsoon season rainfall series were calculated. The percentage contributions of monthly rainfall to monsoon season rainfall values were also calculated. Frequency distributions of monsoon months and monsoon season rainfall were developed. The monsoon months and monsoon season rainfall time series were splitted in four sub-periods viz. 1983-1989, 1990-1999, 2000-2009 and 2010-2014. The difference in mean of monsoon months and monsoon season rainfall were tested by student t-test at 5% level of significance. The trend in monthly and monsoon season rainfall were tested by Mann-Kendall rank correlation test, Sen's slope estimator method and by regression test for linear trend. The value of Mann-Kendall statistic is negative for June, July, August, September and Monsoon season rainfall indicating a falling trend. However trend is not significant in all the cases at 5% significance level. Rising trend for the month of August and falling trend in case of June, July, September and Monsoon season are observed by Sen’s method. No significant rising or falling trend on the regression slope for all the time series is observed at 5% level of significance.
DOI: 10.22271/chemi.2020.v8.i2c.9671
Pages: 130-135 | 565 Views 78 Downloads
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How to cite this article:
Ghanshyam Panwar and Vivek Kumar. Trend analysis of monsoon season monthly rainfall of Nagwan watershed. International Journal of Chemical Studies. 2020; 8(2): 130-135. DOI: 10.22271/chemi.2020.v8.i2c.9671
