Water reservoirs in the standard disk; the white line represents the contour of T_dust = 100 K, the black and red dashed curved lines represent the contours of optical extinction for A_V = 1 and A_V = 10, respectively. The water ice reservoir is outlined by the white contour and the dashed line corresponds to A_V = 10. Vertical red dashed lines and the orange rectangle delimit the water reservoirs.