For an AR(2) model, the parameters have been estimated as 1 (2) = 0. 35 and

For an AR(2) model, the parameters have been estimated as ϕ₁(2) = 0. 35 and ϕ₂(2) = 0. 5. Check the parameters’ stationary condition. If it is used for 100-year normal and standardized annual inflows to a reservoir and the first and second correlation coefficients are estimated as ρ₁ = 0. 6 and ρ₂ = 0. 35, estimate the model parameters if the variance of normal and standardized inflow series is estimated as 1. 6.