Responses of Tidal Currents to Artificial Island and Multiple Projects
Artificial islands often constitute a complex engineering system with sea-crossing bridges,coastal protection and other projects.Scientific assessment of the impacts of artificial island and multiple projects on the tidal dynamics is of great guiding significance for the development and utilization of marine space resources.A hydrodynamic numerical model for Sanya new airport project in Hainan Province was established.The model was first validated against the observed data including tidal level,current velocity and current direction.Then,the responses of tidal currents to the artificial island,offshore submerged breakwaters and sea-crossing bridge were simulated and investigated.It is shown that the tidal currents in the project area have typical characteristics of reciprocating flow.After the artificial island construction,the tidal currents flow around it and the velocity on its north-northeast and south-southwest sides increases.Weak flow regions are formed on the west-northwest and east-southeast sides of the artificial island,where the current velocity decreases significantly.After the construction of the arc-shaped offshore submerged breakwaters,the current velocity on their south and north sides increases under the influence of the flow around.The current velocity inside and on the east and west sides of the breakwaters decreases due to the resistance to flow offered by structures.The impacts of the sea-crossing bridge construction on the tidal current fields are relatively weak.The current velocity generally decreases on the downstream side of the bridge,while increases in some regions sheltered by the artificial island and offshore submerged breakwaters.Overall,the temporal and spatial variation of tidal currents in the project area becomes more complex under the combined action of the artificial island,offshore submerged breakwaters and sea-crossing bridge.The influences of these projects on the tidal current patterns at different locations are various.
万方数据
维普
