Dynamic inundation forecasting method for seawall diffuse burst under action of typhoon storm surge

Abstract

The invention discloses a dynamic inundation forecasting method for seawall diffuse burst under the action of typhoon storm surge. The method comprises the steps of storm surge level and typhoon wave calculation, seawall wave overtopping amount calculation, seawall overtopping judgment and seawall submerging early warning and forecasting, and submerging early warning and forecasting can be rapidly achieved. Comprising the following steps: (1) acquiring related typhoon forecast data, and generating a wind field based on a refined grid; (2) forecasting a storm surge level and typhoon wave parameters through a storm surge numerical model and a wave numerical model; (3) the overtopping amount is calculated by inputting the storm surge level, the wave height and the seawall structure parameters, and after the overtopping amount breakwater burst threshold value is determined according to the seawall structure, the overtopping breakwater burst risk is judged; and (4) the model grid is processed according to the seawall fleeting condition, and dynamic submerging calculation is carried out. According to the method, by establishing the mathematical model of the pre-embankment fine grid and the terrain, correlation coupling calculation of the storm surge and the waves is achieved, and the forecasting precision of the storm surge level and the waves is improved.

Description

technical field [0001] The invention relates to the technical field of natural disaster forecasting, in particular to a method for dynamic submersion forecasting of sea dike flooding under the action of typhoon storm surge. Background technique [0002] Storm surge is a catastrophic natural phenomenon with rapid changes in sea level caused by strong winds, especially typhoons, and has huge destructive power. 44% of the world's population lives in areas less than 150km from the coast, and most of the coastal areas are located in developed cities. Eight of the world's ten largest cities are located in coastal areas, namely Shanghai, Hong Kong, Tokyo, Singapore, London, and Frankfurt , New York and Sydney. [0003] my country's coastline has a total length of 32,000 kilometers and is extremely vulnerable to storm surges, especially in Zhejiang Province. The inundation early warning and forecast of coastal typhoon storm surge is not only related to economic and social developm...

AI Technical Summary

Problems solved by technology

Existing methods have few dynamic inundation predictions under seawall breaches

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