Colloidal transport and deposition through dense vegetation

The effectiveness of submerged synthetic aquatic vegetation on removal colloids from flowing water was investigated to explore retention particulate nonpoint source pollutants in systems. In colloid transport experiments, the deposition rate coefficient dense is often taken as spatially constant. This assumption tested by experiments and modeling aimed at quantifying changes with travel distance vegetation. Experiments were performed a 10-m long, 0.6-m wide flume 5-cm depth under different fluid velocities, initial concentrations, solution pH values. A model accounting for advection, dispersion first-order kinetic described experimental data. showed power-law decrease distance, reached steady state value before end flume. Measured properties (ζ potential size) could not explain observed decrease. While gravity shown contribute decrease, its impact too weak decreasing power law trend, suggesting that processes operating granular media produce similar outcomes may also apply