Optimization layout of tangdao bay yacht harbor in terms of numerical analysis of marine dynamic and sedimentation environment

A new yacht harbor will be built around the top of Tangdao Bay which is close to Jiaozhou Bay in Qingdao city, China. However, as well known, the man-made structures built in coastal zones have some impacts on marine dynamic, water quality and morphology. So construction of the new yacht harbor will affect dynamic and sedimentation environment of Tangdao Bay certainly. The present work will provide two kinds of yacht harbor layout and demonstrate which one is more reasonable by simulating the marine dynamic and sedimentation. During the simulation, the moving boundary technology is applied since bathymetry of engineering area of Tangdao Bay is shallow and includes large area of tidal flat. Triangle grid system is adopted in modeling of current and sedimentation environment of Tangdao Bay. Around location of the yacht harbor, high resolution of grid is provided because the yacht harbor has significant length being 2000m. Open boundary conditions of tide level and tidal current are provided with results of "father" simulation with lower grid resolution and larger modeling area. The father area with the smallest space grid being 500m consists of sea areas of Qingdao city which includes the whole area of Tangdao Bay. The present engineering simulating area has highest resolution being 10m around the yacht harbor. Concrete jobs in the present work includes: (1) studying the effects of the two schemes of layout of yacht on current in detail. (2) calculating and predicting accretion and sedimentation environment induced by the construction of yacht harbor for the two layouts. Generally, to find the more reasonable layout among two layouts available is the most important purpose, which will attenuate the severe effects on environment. As the original case concerned, the values of time series of water level and current velocity provided by simulation for Tangdao Bay before construction of the yacht harbor have a good agreement on observed data. Therefore, the model can be reliable to simulate and analysis the evolution of marine dynamic and sedimentation environment.