Discuss the main hazards caused by storm surge hazards

Storm surge disasters refer to disasters caused by abnormal rise and fall of the sea surface caused by strong weather systems such as typhoons, extratropical cyclones, strong winds of cold fronts, and sudden changes in air pressure, resulting in loss of life and property, also known as "storm water increase", "storm tsunami", "meteorological tsunami" or "wind tide". Storm surges can cause the tide level in the affected areas to significantly exceed normal tide levels, causing massive damage.

Storm surge disasters are divided into four levels according to the strength of the water increase height: storm water increase, the water increase value is less than 1 meter; weak storm surge, water increase value 1 2 m; strong storm surge, water increase value 2 3 m; Extremely strong storm surge, water increase value of more than 3 meters. Storm surge is a particularly destructive marine disaster, if it occurs at the same time as the astronomical tide, the two are superimposed, often with strong winds and waves, slamming down on the coast or tracing the river with the momentum of overwhelming mountains and seas, causing the tide in the coastal area to surge, and even wash away or overflow the seawall and river embankment, swallowing up towns, villages, docks, factories, flooding farmland, causing particularly serious losses of people and property; In some cases, storm surges can also cause collapses and landslides, further exacerbating the damage caused by disasters.

Storm surge disasters are widely distributed in China, covering almost the entire coastal area; However, the areas with more serious disasters mainly include: the coastal areas from Bohai Bay to Laizhou Bay, the Yangtze River Estuary and Hangzhou Bay, the central coastal areas of Zhejiang, the northern coastal areas of Fujian, and the coastal areas of Guangxi.

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What are the hazards of storm surge?

Storm surge is a tidal phenomenon in which large waves are drawn towards the coast during a typhoon or cyclone when the intensity of the typhoon or cyclone is strong, forming a tidal phenomenon with a height exceeding the mean sea level. When storm surge occurs, it often causes many terrible disasters, which cause great harm to people's survival and property safety.

First, the serious destruction of the coastline. The waves caused by storm surges are so powerful that they can sometimes even break seawalls or breakwaters, causing waves to reach inland areas and cause great damage. In some typhoons in history, storm surge has been as hazard as a tsunami, and the damage in coastal areas has been extremely severe.

Second, the disruption of transportation. The transportation system is an indispensable part of social productivity, but when the storm surge comes, due to the great impact of the waves, it often causes serious traces on roads, bridges, waterways, etc., resulting in traffic interruption, so the daily life in many places produces a lot of inconvenience, and the traffic difficulty increases.

Thirdly, the serious impact of agricultural and fishery production. After the storm surge, the impact of agriculture and fishing in coastal areas is higher. Due to the very strong impact of the storm surge, some farmland and fishery resources in coastal areas are extremely vulnerable, resulting in a great impact on the lives of many farmers and fishermen, and the quality of life and benefits have been greatly affected.

It can be seen that storm surge and famine will cause many other disasters, which may cause great difficulties to our lives and economy. Therefore, for this inevitable disaster, we need to focus on strengthening disaster prevention and mitigation efforts to reduce the impact of storm surges on life and the economy.

The destructive power of a typhoon is caused by three factors: strong winds, heavy rain and storm surge.

Of course it is.

Typhoon disaster.

Typhoons are a devastating and severe weather system, but they can also sometimes have a beneficial effect on eliminating droughts. There are three main aspects of its harmfulness:

Gale. The maximum wind speed near the center of the typhoon is generally 8 or higher.

Rainstorm.

The destructive power of a typhoon is caused by three factors: strong winds, heavy rain and storm surge. （)

--Caused by three factors: high winds, heavy rain and storm surge!

What are the hazards of storm surge?

The amount of precipitation.

Storm surge, also known as "storm water increase", "storm tsunami", "meteorological tsunami", "wind surge", etc., is a phenomenon caused by violent atmospheric disturbances, such as strong winds and sudden changes in air pressure (usually referring to disastrous weather systems such as typhoons and extratropical cyclones), which cause the abnormal rise and fall of sea water, so that the tide level of the affected sea area greatly balances and collapses beyond the normal tide level. Its effects generally range from tens to thousands of kilometers and last anywhere from a few hours to hundreds of hours.

Formation. Depending on the nature of the storm, storm surge is usually divided into two categories: extratropical storm surge caused by extratropical cyclones and typhoon storm surge caused by typhoons.

Extratropical storm surges occur mostly in spring and autumn, but also occur in summer. It is characterized by a relatively gentle process of water increase, and the height of water increase is lower than that of typhoon storm surge.

The main manuscripts are produced in the mid-latitude coastal areas, with the North Sea coast of Europe, the east coast of the United States, and the coast of the northern sea area of China.

Typhoon storm surge is mostly seen in summer and autumn. Its characteristics are: fierce, fast, strong and destructive. Typhoon storm surges occur in all maritime countries and coastal areas affected by typhoons.

Marine disasters.

Storm surge is a phenomenon caused by strong winds and sudden changes in air pressure accompanied by the passage of catastrophic weather such as tropical cyclones, extratropical early cyclones, and sea squall lines, which cause local sea surface oscillations or non-periodic abnormal increases (decreases). Disasters caused by rising coastal waters caused by a combination of storm surges, astronomical tides, and near-shore waves are called storm surge disasters. Depending on the nature of storms, storm surges are usually divided into two categories: extratropical storm surges caused by extratropical cyclones and typhoon storm surges caused by typhoons.