Abundance maps of H₂O (left and middle panels) and temperature map (right panel) for the fiducial models with f_ℓ = 0.9. The left panel depicts the model using the chemical network, and the middle depicts the model with parameterized abundances. In all panels, the dust τ = 1 surface at 15 μm and the A_V = 1.5 surface are indicated with a dashed blue line and a dotted black line, respectively. The red, pink, and blue contours represent the 70% emitting regions of the H₂O 17_7,10−16_4,13 (E_up = 6371 K), 11_3,9−10_0,10 (E_up = 2438 K), and 8_3,6−7_0,7 (E_up = 1447 K) lines, respectively, representing hot, warm, and cold H₂O. The warm H₂O emitting region for both models is also depicted in the right panel in black. The light blue line in the left and middle panels represents the H₂O snow surface.