Gulf of California (Mexico) XBeach Yangtze estuary coastal boulder deposit coastal defence system coastal engineering coastal lagoon coastal sediment transport coastal zone contaminated sediment management cross-shore sediment transport dissolved and particulate metals dredging dredging and disposal early diagenetic process engineering practice enrichment factor environmental effects equilibrium profile groundwater discharges harbor siltation high-resolution hurricane storm surge hydrodynamic equations labile forms marine sediment mathematical modeling and monitoring mathematical modelling morphological dynamics numerical model