南中国海卫星高度计潮波反演技术的研究与应用

A finite element tide model and a response method had been developed. The influence of sea level variation on the hydrodynamic model has been studied, and its application on the determination of engineering water level has also been studied. The study area has been extended to the whole China Sea. The marked feature of the finite element model is the fully nonlinear hydrodynamics in the time domain and the advanced turbulence closure. The difference between the simulation and the observation is as follows: for elevation, the difference on amplitude and phase-lag is 8.9cm, 9.6°, and 4.6cm, 17.4° for M2 and K1 respectively; for tidal current of M2, the difference is 8.23cm, 23.7°, and 7.36, 28° for the East component and the North component respectively, and for K1, the corresponding difference is 8.39cm, 36.5°, and 9.4cm, 38.0° respectively. The averaged absolute difference of the response method is 4.7cm, 11.6° and 11.9cm and 28.4° of the amplitude and phase-lag for elevation of K1 and M2 respectively in the South China Sea. The variation on amplitude of M2 can arrive 15cm corresponding to the 60cm increase on sea level and the maximum appears in the area near the Fujian coast. The Design water level and the Check water level increase obviously. The Check water level with joint probability method when tide correlates with storm differs 30cm with that when tide does not correlate with storm. The maximum influence of sea level variation on engineering water level may be over 80cm.

利用卫星高度计数据，反演潮波的反方法研究。采用反方法理论，构造有限元非咝远δＰ汀⒔呔鹊模裕懈叨燃谱柿虾湍现泄Ｑ匕逗偷河煅槌弊柿贤蕉δＰ椭星蠼狻＝⑹屎衔夜虾５母呔鹊那蛐越Ｓ邢拊毕Ｐ停岣呶夜辈嗖夂驮けㄋ健