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Rainfall probability analysis for crop planning in Rayagada district of Odisha, India


International Journal of Hydrology
Subudhi CR,1 Nibedita Jena,2 Sukanya Suryavanshi,2 Subudhi R2

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Abstract

This study was under taken in the U.G. thesis work in the Dept. Of SWCE, CAET, OUAT, Bhubaneswar during the year 2018-19. Rayagada district has a total geographical area of 7584.7sq.km. Rayagada district has latitude of 26oN and a longitude of 94o20’E. The average rainfall at Rayagada district is around 1340.3mm, though it receives high amount rainfall but most of the rainfall occurred during kharif. So most of the crops get low yield due to improper crop planning. Thus, this study is proposed to be undertaken with the following objective: Probability analysis of annual, seasonal and monthly rainfall data of Rayagada district. So rainfall data were collected from OUAT, Agril Meteorology Dept. from 2001 to 2017(17years) monthly, seasonal and annual rainfall were analyzed .Probability analysis have been made and equations were fitted to different distributions and best fitted equations were tested. Monthly, Annual and seasonal probability analysis of rainfall data shows the probability rainfall distribution of Rayagada district in different months, years and seasons. It is observed that rainfall during June to Sep is slightly less than 1000mm and cropping pattern like paddy(110days) may be followed by mustard is suitable to this region. Also if the kharif rain can be harvested and it can be reused for another rabi crop by using sprinkler or drip irrigation, which will give benefit to the farmers. Annual rainfall of Rayagada district is 1340.3mm at 50% probability level.

Keywords

rainfall, probability analysis, crop planning

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