The second phase reclamation of Wenzhou shoal and its impact on the evolution of Qujiang river estuary

Tidal flats reclamation changes the dynamic conditions of a tidal estuary and an analysis of the reclamation impacts on the estuary evolution is often needed to make a scientific project decision.This paper describes the sediment transport conditions of Wenzhou shoal and shows the following impacts of Wenzhou shoal reclamation on the estuary evolution.First,with the tidal flat along the main flow directions of the south and north estuary branches,the reclamation only causes local changes in tidal dynamics and no change in either the dynamic center or the main flow structure of the estuary,so it is consistent with the natural evolution.Second,for the second-stage reclamation,the sediment transport near the tidal flat is nearly in equilibrium and it is necessary to enhance the deposition and prevent erosion.Moreover,further study is needed to understand the impact on the estuary ecological environments.