Best fit probability distribution analysis of precipitation and potential evapotranspiration of India’s highly dense population state - Bihar

Planning of water resources and its management with the ambiguity non-uniformity accompanying precipitation other meteorological physical characteristics may perhaps effect on agricultural production in Bihar where farmers mostly depend precipitation. The potential evapotranspiration temporal distribution state is irregular due to geomorphology, climatic anthropogenic factors state. In present study, attempt taken expose best-fit probability among various available annual average based 102 year past records all 37 districts On basis ranks goodness fit tests such as Kolmogorov Smirnov, Anderson Darling Chi-Squared, normal was observed for 11 followed by Weibull (3P) 9 districts, Beta 5 rest Whereas Cauchy come out second best Gamma covering almost 60% total General Extreme Value (32%). results can be used future hydraulic design, hydrological study estimation return period resource planners policy development.