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

A storm surge and seawall technology, applied in the field of natural disaster forecasting, can solve the problem of less dynamic submersion forecasting, and achieve the effect of improving forecasting accuracy

Active Publication Date: 2022-05-17
浙江省海洋监测预报中心 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Existing methods have few dynamic in...

Method used

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

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Embodiment

[0043] Embodiment: A method for dynamic submersion forecasting of seawall flooding under the action of typhoon storm surge includes establishing a set of refined grids, a set of storm surge-wave coupling models and a set of calculation models that can be connected in series and determine flooding The computer control program for adjusting the model setting and calculating the submersion behind the embankment, and the calculation program control brief flow diagram figure 2 As shown, the specific steps of this embodiment are as follows figure 1 Shown:

[0044] Step 1: Obtain typhoon forecast data, and generate wind field based on refined grid

[0045] By connecting to the weather website, enter the typhoon time period to automatically obtain the typhoon forecast time, path and air pressure parameters;

[0046] A refined grid is established, in which the open boundary grid resolution is 55km, the offshore grid resolution is 100-300m, and the nearshore grid resolution is 100m i...

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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...

Claims

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Application Information

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IPC IPC(8): G06F30/13G06F30/20
CPCG06F30/13G06F30/20Y02A90/10
Inventor 朱业陈甫源樊立东车助镁于普兵郭敬贺成奇李婷
Owner 浙江省海洋监测预报中心
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