海南清水湾地区风和波浪要素特征分析

发布时间：2018-02-28 02:09

本文关键词： WRF SWAN 清水湾风要素波浪要素　出处：《中国海洋大学》2014年硕士论文　论文类型：学位论文

【摘要】：本文基于区域气候模式WRF，采用GRAPES三维变分同化系统，建立了20年再分析南海风场的数据集。通过对冬季风、夏季风和台风个例的对比，验证了模式结果的可靠性。通过对再分析数据的季节变化分析显示，整个清水湾及附近海域风场的季节变化非常明显，受制于季风转换。同时由于夏季多受台风旋转大风风场影响，，在考察此区域风要素时还需要结合台风季节的多变性。基于自嵌套的浅水第三代海浪模式SWAN进行了清水湾附近海域波浪场的模拟。清水湾海区波浪场的季节变化较大。夏季有效波高大约在0.7米左右，波向主要为南向，波高差别不大，但向东北方向递增。冬季受东北季风影响，波高最大，为东北向浪，普遍可达2米以上。研究了2005年第18号台风“达维”的整个风浪发展过程。“达维”是直接经过清水湾附近海域的强烈台风之一，整个过程中清水湾附近风速最大可达27m/s，风向经历了北—西北—西南—南向的变化。随着台风的逼近，清水湾附近波浪波高逐渐增大，波向经历了北—西北—西—西南—南向的变化。在海洋环境规划，海洋预报，海洋工程和军事活动中都必须要考虑台风浪的影响。为全面考察清水湾地区的波浪状况，本文还给出外海三个代表性点P1（30米）、P2（35米）、P3（40米）6个方位（ESE,SE,SSE,S,SSW,SW）重现期波浪要素。经P-III曲线模拟得到结论：清水湾强浪向为S至ESE，相对来讲SW、SSW方向波浪较弱，越向外海ESE向波浪越强。湾内30米水深处50年一遇波高可达6米以上，40米水深处50年一遇波高可达8米以上。
[Abstract]:Based on the regional climate model (WRF) and GRAPES three-dimensional variational assimilation system, a 20-year reanalysis data set of the South China Sea wind field has been established. The comparison of winter monsoon, summer monsoon and typhoon is carried out. The reliability of the model results is verified. The seasonal variation analysis of the reanalysis data shows that the seasonal variation of the wind field in the whole clear Water Bay and its adjacent waters is very obvious. It is restricted by the monsoon transition. At the same time, it is affected by the wind field of typhoon rotation in summer. It is also necessary to combine the variability of typhoon season with the wind elements in this area. Based on the self-nested third generation wave model SWAN, the simulation of wave field near clear water bay is carried out. Seasonal variation of wave field in clear water bay. The summer effective wave height is about 0.7 meters, The wave direction is mainly southward, but the wave height is increasing in the northeast direction, and the wave height is the largest in winter due to the influence of the northeast monsoon, and the wave height is generally more than 2 meters in the northeast direction. The whole process of wind and wave development of Typhoon No. 18 (2005) was studied. "Davi" was one of the strong typhoons passing directly through the waters near clear Water Bay. During the whole process, the maximum wind speed near clear Water Bay can reach 27m / s, and the wind direction has experienced a change from north to northwest to southwest to south. With the approaching of typhoon, the wave wave height near clear water bay increases gradually. The wave direction has undergone a change from north to northwest to west to southwest to south. The influence of typhoon waves must be considered in marine environmental planning, ocean forecast, ocean engineering and military activities. In order to investigate the wave situation in clear Water Bay area, In this paper, the wave elements in the recurrence period of the three representative points P1 ~ (30 m) ~ (P ~ (2 +)) ~ (35) m ~ (3 ~ (3) ~ (40 m)) are also given. The results of P-III curve simulation show that the strong wave direction of clear Water Bay is from S to ESEs, but the wave in SWSSW direction is weaker than that in SWSSW direction, and the results are as follows: (1) the wave direction of clear Water Bay is from S to ESE, but the SWSSW direction is relatively weak. The water depth of 30 meters in the bay can reach 6 meters or more than 40 meters in 50 years, and the wave height can reach more than 8 meters in 50 years.
【学位授予单位】：中国海洋大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：P732;P731.22

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