An analytical model for preliminary assessment of dredging-induced sediment plume of far-field evolution for spatial non homogeneous and time varying resuspension sources

摘要: Abstract In recent years, increasing attention has been paid to assess the dispersal of resuspended sediments and related water quality problems due dredging operations. This paper presents an analytical model aimed predict temporal evolution spatial distribution in far field suspended concentration increase activities or open disposal. particular, whatever source strength geometry can be considered define leaving immediate vicinity resuspension source. Indeed, a feature is removing hypotheses continuous steady state, peculiar majority available theoretical models. Hence, proposed able describe different sources provide picture resulting plume. Of course, some have assumed order make possible achieve solution governing equation: two dimensional horizontal plane; ambient currents are homogeneous space slowly time varying; turbulent diffusion coefficients flocculent settling velocity space; depth constant; domain infinite. Even with its limitations, still worst case preliminary assessment plume migration very useful guide more detailed numerical analysis select appropriate simulation scenarios. The used for testing purposes. A series practical applications described through (i) catch general features involved phenomena, (ii) compare results those previous researches (iii) benchmark cases may also as first rough prediction area affected by dispersion considering scenarios (i.e. equipment operational techniques forced site-specific environmental conditions), thus basis sophisticated modeling support projects planning management.