Author(s):

Monika Mahilange and Gopi Krishna Das

Abstract: Long term rainfall data of 40 year from (1973-2015) at five districts viz. Balrampur, Jashpur, Koriya, Surajpur and Surguja districts of northern hill zone of Chhattisgarh has here analyzed to story the trend analysis. The rainfall data collected from department of agrometeorology, IGKV Raipur. This data series wite different datanese for different districts was analyzed by using weather cock and Mann Kandell software. Rainfall trend was also analyzed through linear regression line. The data revealed the average annual rainfall of 1146, 1396.6, 1235, 1215 and 1360.4 mm respectively for selected districts viz. Balrampur, Jashpur, Koriya, Surajpur and Surguja. When we compare the rainfall pattern of these five districts, a decreasing trend of annual rainfall was reported significant only in Balrampur and Koriya at 5% level of significance. Seasonal (south west monsoon) rainfall trend has been showing a significantly decreasing trend at Jashpur and Koriya at 5% level of significance.

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