Time evolution of the dust, planetesimal, and solid (sum of the dust and planetesimals) mass with τ_SI = 10 yr and α = 10⁻³⁴. The blue, red, and purple curves represent the profiles of the dust, planetesimal, and solid, respectively. The dashed blue line represents the slope of the dust mass assuming constant loss with . The red dashed line represents the slope of the cumulative mass of the dust drifting into the planetesimal formation place with the same mass flux.