Observed H₂O line profiles towards L1448-MM (Kristensen et al. 2011) compared with synthetic predictions (in color) for the grid model best fitting the 557 GHz line (reproduced in the top left panel). Red solid curves are for = 6.4 AU and green dashed curves are for = 3.2 AU. The former fits the red wing intensities better, while the latter fits the blue wings better. The high-velocity bullets at ±50 km s^-1 trace axial shocks not included in our steady-state wind model.