Numerical Simulation Of Water Exchange In Inner Lake Of Artificial Island

Artificial island is a typical coastal project,relying on artificial island often built cruise terminal,yacht berth,leisure beach,water park,lake water system and other recreational facilities and landscape engineering,artificial island water quality environment for artificial island integrated function Which is of great significance.In particular,the water exchange capacity of artificial lake water system is an important index to affect the landscape environment of artificial island.It is necessary to carry out the study of water exchange in artificial lake.It can be used for the planning,Management to provide theoretical basis and scientific guidance.Based on the FVCOM mathematical model,this paper constructs the mathematical model of three-dimensional hydrodynamics and material transport in Ruyi Island,and calculates the tidal dynamic conditions and its inner lake Water system,the main work and content of the paper are as follows:(1)Through the FVCOM hydrodynamic model,a double nested grid was used to establish the mathematical model of the artificial island sea area.The hydrodynamic simulation of the artificial island water system was carried out,and the flow field of the artificial island and its internal water system was analyzed.And the influence of monsoon on the flow field of artificial lake.The results show that the hydrodynamic intensity of the middle water system is better than that of the western and eastern part of the artificial island under the influence of tidal current and monsoon,and the flow velocity is larger than that in the eastern part.The vertical direction of the water body from north to south,horizontal from east to west flow,the surface and the bottom of the basic flow of the same;west flow time period,the vertical from south to north,horizontal from east to west flow.(2)Using the particle tracing model to simulate the lake water exchange in the artificial island,the results show that the large amount of water exchange between the artificial island water system and the offshore sea is mainly concentrated in the first tide cycle,with the rising tide will be accompanied by a certain old Water reflux.The poor water exchange area is mainly the western end of the western waters of the artificial island,the archipelagic waterway,the southern part of the central part and the eastern part of the waterway,the central area waters of the water exchange is good.SSE wind direction and S wind direction is conducive to artificial island lake water exchange,ENE wind direction to suppress the lake water exchange capacity.(3)By introducing the gate opening and closing module in the hydrodynamic model,and the water level and the internal and external exchange of the lake within the gate control are opened and closed according to the rising tide.The influence of different scheduling methods on the water exchange capacity was analyzed and analyzed.