Total mass of pebbles and planetesimal and water fraction in the gas in the disc. Left panel: Total mass of pebbles (light blue lines) and planetesimals (dark blue line) in the two scenarios: pebble accretion-only (dotted line) and planetesimal formation (solid lines). Middle and right panel: Water content in the gaseous phase of the disc with viscosity α = 10⁻³ as a function of radius and time in the case of no planetesimal formation (middle) and in the presence of planetesimal formation (right). The vertical violet line indicates the water evaporation front in the disc.