Massaccretion rate measured across the disk surface (Ṁ_s(< r)), measured radially inside the disk (Ṁ_r(r)), and inferred from the measured α (Ṁ_α (r)) for R_ℓ14 and R_40ky_ℓ18 at 103 ky, R_ℓ14 and R_80ky_ℓ18 at 138 ky (from top to bottom). Both positive and negative values with |Ṁ | > 10⁻⁷ are plotted in logarithmic scale, and this is connected with a linear range in between. Most of the surface flux arrives where the slope of Ṁ_s(< r) is the steepest. Below this radius, the disk readily accretes in the radial direction only at a very small radius (<1 AU), and the outer part can have complex motions. The radial mass flux derived from α is not exactly the same as Ṁ_r(r), although the amplitudes are comparable.