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The Application of Perturbation Method for the Study of Storm Surge

Author: FengXiuLi
Tutor: WangPing
School: Tianjin University
Course: Computational Mathematics
Keywords: Storm surge Astronomical tide Coupling effect Perturbation method
CLC: P731.23
Type: Master's thesis
Year: 2010
Downloads: 50
Quote: 0
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Abstract


The storm surge is a huge phenomenon of natural disasters , from the sea to the extent of the disaster among the first marine disasters . China Pacific Ocean , has a long coastline and many waters , which provided favorable conditions for China's economic development , but this is also making China the world suffered one of the countries with the most serious storm surge . Coastal areas favorable natural conditions, the extremely rapid development of socio-economic , demographic and social wealth is highly concentrated , in the event of a storm surge , the loss would be extremely serious . Therefore, through the strengthening of the physical mechanism of the research within the storm surge , efforts to explore the laws of the occurrence of the storm surge and storm surge forecasting methods , urgent and practical significance for human survival and development . The difficulties of the storm surge that the storm surge is a nonlinear phenomenon , coupled with the coupling effect of the storm surge and astronomical tide , making them very difficult to solve the exact solution of the storm surge . Parameter perturbation method storm surge theoretical research , find the approximate expression of the storm deliquescence , and get some useful conclusions ; In addition , in order to avoid complex calculations in this paper that can avoid long-term items parameter perturbation method . In order to be able to clearly explain the physical mechanism of the storm surge , the various factors of the impact of storm surge primary and secondary sort , without affecting its substance under the conditions of the basic governing equations of the storm surge has been simplified , and then the parameter perturbation method , the storm surge water levels and flow field of the particle velocity approximate expression are obtained ; on this basis , the paper analyzes the coupling effect of the storm surge and astronomical tide , as well as physical parameters on the increase of the water level in water affected. This paper obtained an approximate expression is simple and accurate and concluded in line with the coupling phenomena of the storm surge and astronomical tide , these conclusions can provide a reference for the test results of numerical simulation , contribute to the study of storm surge .

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CLC: > Astronomy,Earth Sciences > Oceanography > Marine basic science > Marine hydrology > Ocean dynamics > Tidal
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