Chinese offshore extreme wave event analysis method

Abstract

The invention discloses a Chinese offshore extreme wave event analysis method. The method comprises: obtaining wave data of recent M years through calculation of a TOMAWAC wave model; defining a critical value of the extreme wave event; defining the intensity of an extreme wave event; defining the number of extreme wave events; defining the duration of the extreme wave event; and according to thedefined critical value, intensity, frequency and duration of the extreme wave event, carrying out comprehensive assessment on the wave event of China offshore each year. According to the invention, the critical value of the extreme wave event, the occurrence frequency, duration and intensity of the extreme wave event are defined; the annual average frequency, the annual average duration and the annual average intensity of the extreme wave events occurring each year are calculated according to the defined critical values, frequencies, durations and intensities; extreme wave events occurring offshore in China in recent years can be comprehensively evaluated more accurately and effectively, and the situation that the extreme wave events occur offshore in China in the future can be estimated.

Description

technical field [0001] The invention belongs to the technical field of ocean wave parameter analysis, in particular to an analysis method for extreme wave events in China's coastal waters, which is a method for comprehensively analyzing extreme wave events by using the frequency, intensity and duration of extreme wave events occurring in various sea areas. Background technique [0002] Waves are an important hydrodynamic factor in the estuary and coastal areas. They not only have an important impact on nearshore hydrodynamic processes and material transport, but are also dynamic factors that must be considered in the design of coastal buildings. At the same time, along the southeast coast of my country, frequent typhoons in summer and autumn are often accompanied by huge waves, posing a huge threat to the safety of coastal buildings and personnel. According to statistics, from 2009 to 2016, the direct economic loss of marine disasters nationwide reached 87.267 billion yuan, ...

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Problems solved by technology

[0003] At present, the research methods on extreme wave events are not uniform. Wang Zhifeng et al. use the annual extreme value of effective wave height to define extreme wave events; Zhang Wei et al. believe that 1 / 10 of the waves with a wave height greater than or equal to 3m are extreme waves; Xing Chuang et al. Waves with significant wave height greater than or equal to 4m are regarded as extreme waves

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