Fig. 1: Material flow of silty wastes in Wenzhou.

Center: A landfill site near Wenzhou bay and a snapshot of SR pileup where plants can hardly grow; left: flow of SR including river bed silts, pits and engineering slurries from underground construction to the landfill site; right: material flow of building demolitions, where the useful coarse aggregate (CA) and fine aggregate (FA) are recycled and the useless residues are discarded in the landfill site.