STUDY ON MODELING THE TIDE WAVE SYSTEM OF EAST CHINA SEA WITH GIS
Hui Lin(1)Lu Guonian(2)Song Zhiyao(3)Wang Jiechen(2) Chen Zhongmin(2)Shi Yi(2)((1)Department of Geography, the Chinese University of Hong Kong, Hong Kong;(2)Nanjing Normal University, Nanjing 210097;(3)Hehai University, Nanjing 210097)
This paper describes the systematic research on Tide Dynamic System under the support of Geographic Information System and ocean fluid dynamics model. Through the high resolu-tion numerical simulation, we found some previously unreported phenomena such as a low tide amplitude zone of M2 Constituent nearing Zhoushan isle, a low tide amplitude zone of K] Con-stituent nearing Taiwan isle, and circular flow point band. The results of this research also show that the formation of tide wave system are affected by sea bottom friction coefficient, to-pography under water and shore line morphology. The change of shore line morphology and huge change of topography under water play an important role in the tide wave system. Under specified conditions on input tide wave, shore line morphology has a dominant impact on the formation of the tide wave system. With the systematically reconstructed sea level and the coast change of thirty periods since full period of the last glacier, the evolution process of tide wave system of East China Sea was simulated. Based on the simulation analysis of relationships among topography, shore line and tide flow, the conclusion of this study shows that the char-acteristic of tide dynamic system is a dominant influencing factor on the formation of large scale sand ridge clusters. In this paper, the system integration of geographic information system, tide numerical simulation system and tide movement visualization system are discussed as an example for related studies.