Optimization Layout of Tangdao Bay Yacht Harbor In Terms of Numerical Analysis of Marine Dynamic And Sedimentation Environment
Optimization Layout of Tangdao Bay Yacht Harbor In Terms of Numerical Analysis of Marine Dynamic And Sedimentation Environment
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基于海洋动力与沉积环境数值分析的唐岛湾游艇港优化布局
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2010
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青岛市将在胶州湾附近的唐岛湾顶部建造一个新的游艇港。然而，众所周知，在海岸带建造的人工建筑物会对海洋动力、水质和形态产生一定的影响。因此，新建游艇码头对唐岛湾的动力和泥沙环境将产生一定的影响。本文将提出两种游艇港布局方案，并通过对海洋动力和泥沙的模拟，论证哪一种方案更为合理。针对唐岛湾工程区水深较浅、滩涂面积大的特点，在模拟过程中采用了移动边界技术。采用三角形网格系统模拟唐岛湾的流沙环境。在游艇码头周围，由于游艇码头有2000米的长度，因此提供了高分辨率的网格。在较低的网格分辨率和较大的模拟面积下，提供了潮位和潮流的开边界条件和“父”模拟结果。最小空间网格为500 m的父区为青岛市海域，包括整个唐岛湾。目前工程模拟区的最高分辨率为游艇码头周围10 m。具体工作包括：（1）详细研究了两种布置方案对水流的影响。(2)对两种布局的游艇港建设引起的淤积环境进行了计算和预测。一般而言，在现有的两种布置方案中，寻找更合理的布置方案是最重要的目的，以减轻对环境的严重影响。作为原始案例，模拟得到的唐岛湾游艇港建设前的水位、流速时间序列与实测值吻合较好。因此，该模型可以可靠地模拟和分析海洋动力和沉积环境的演变。
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.