Which cities will be affected by rising sea levels and sinking ground?

Sea level rises.

It's that the depth of the ocean increases, the relative height of the earth decreases, the sea level rises, and in the inland high altitudes, you may not feel any impact, but in some coastal areas, you may feel some of the effects. What will be the impact of rising sea levels and sinking ground? Let me introduce it to you, let's take a look!

As the sea level rises, some coastal cities will be submerged, cities will be destroyed, human beings will not be able to survive and develop normally, animals will not be able to survive, there are many cities like this, such as: the Netherlands, the United Kingdom, Japan, etc., many cities in these countries have very low altitudes. <>

Rising sea levels and subsidence of the ground are environmental problems.

Behind it is caused by people's various behaviors, so we should not bury our own living homes in our own hands, the rise in global temperature will lead to sea level rise, so reducing the emission of some harmful substances can reduce the frequency of sea level rise. <>

For everyone, to survive on the earth, we must protect the environment, so that we can survive on the earth longer, the earth survives longer, and the protection of the earth is the common responsibility of the whole earth, the whole world, and all mankind, so it is the responsibility of all of us to protect the environment. <>

To sum up, this is to bring you some related content to explain, interested or not understand the rise of sea level, the sinking of the ground can take a look, understand, of course, is my personal point of view, not authoritative, everyone is benevolent, wise and wise, as the saying goes, 1000 readers have 1000 Hamlet. Oh!

Sea level rise will first affect coastal cities, such as Shanghai, Ningbo, Haikou, Xiamen, Hangzhou, Zhuhai and other cities in China, which are at risk of flooding, as well as many foreign cities. In addition, seawater intrusion can also cause geological changes, which in turn will lead to subsidence.

Coastal cities such as Qingdao, Dalian, Hangzhou, Xiamen, Shanghai, Fuzhou, etc., will be greatly affected, and these cities will face flooding as the sea level rises.

It will affect many coastal cities, such as Guangzhou, Shenzhen, Shanghai, Fujian, and Xiamen. If the situation gets worse, it will also affect inland cities.

The Earth's sea level rise and land subsidence are affecting coastal cities across the globe.

Sea level rise is a global phenomenon caused by global warming, melting polar glaciers, and thermal expansion of upper seawater. Among them, global warming is the most fundamental factor of sea level rise. After the Industrial Revolution, the heavy use of fossil fuels in industry led to an increase in carbon dioxide in the atmosphere, as well as other trace gases such as methane, resulting in a greenhouse effect.

The gradual rise in temperature also brings many problems, one is that the sea water expands when heated, for example, when the temperature is 25, the water temperature increases by 1, and the water layer will expand by about centimeters. The thermal expansion of seawater is the most important factor contributing to sea level rise.

In addition, the Greenland ice sheet and the Antarctic ice sheet due to global warming, as well as the accelerated melting of mountain glaciers, are also contributing to sea level rise. It is estimated that the Greenland ice sheet has melted an average of about 3,030 billion tons per year over the past decade, and the Antarctic ice sheet has melted an average of 1,180 billion tons per year. Due to climatic reasons, between 2003 and 2009, many small land glaciers melted at an accelerated rate, especially in the mountains, which melted significantly faster than large ice sheets.

What are the harmful effects of sea level rise.

1. The accelerated rise of sea level has become a major disaster in the coastal zone. If sea levels continue to rise, nearly 70 percent of the world's coastal zones, especially the vast low-lying delta plains, will become a country, and sea water can invade 20 to 50 to 60 kilometers, or even more. Many of the world's most famous cities on it, such as New York, London, Amsterdam, Venice, Sydney, Tokyo, Rio de Janeiro, Tianjin, Shanghai, Guangzhou, and many more, will be submerged.

Some low-lying island nations in the South Pacific and Indian Oceans will be semi-submerged. In 2001, the Pacific island nation of Tuvalu decided to move to New Zealand, becoming the first country in the world to abandon its homeland due to rising sea levels.

2. Sea level rise has exacerbated coastal seawater intrusion and soil salinization. China's Bohai and Yellow Sea coasts, for example, are most threatened by seawater intrusion. Soil salinization is serious in coastal areas such as Liaoning, Hebei, Tianjin and Shandong.

3. Sea level rise will not only exacerbate storm surge disasters, but also increase the threat of flooding. Storm surge is a phenomenon in which a typhoon or extratropical storm pushes seawater into a closed bay, causing an abnormally high sea level. On 2-3 May 2008, Tropical Storm Nargis struck Myanmar, causing the world's worst storm surge disaster since 1991, killing more than 120,000 people and affecting about 2 million people.

What will happen to sea levels by the end of the century? It was shocking.

Sea level rise can have very serious consequences: inundating large areas of coastal lowlands, causing them to disappear into the white waves; Many island nations or islands, such as the Maldives, Seychelles, Bahamas, Kiribati, Tuvalu, and Midway, Bikini, Christmas Island, etc., will be partially or even completely swallowed by the sea; In countries with altitudes close to or below sea level, such as Bangladesh, 1 3 percent of the country will be submerged to a depth of more than 3 meters during the rainy season after sixty or seventy years; All coastal countries are threatened by seawater intrusion, and they will pay a high price to protect coastal cities and lands......

Of course, China is no exception.

According to the study, coastal cities are sinking faster than sea level rise, which will have the following impacts.

Global sea levels are rising at a rate of millimeters per year, mainly due to the melting of glaciers due to climate change. In many areas, groundwater extraction, oil and gas extraction, sediment being squeezed by heavy buildings, can cause land subsidence. This method is called surface subsidence.

Nanyang Technological University, Singapore, surveyed 48 of the world's most densely populated coastal cities. The results of the survey showed that among the 44 cities, the area with the highest subsidence rate had a higher subsidence rate than sea level.

Parts of South and South-East Asia have the fastest rates of subsidence. Ahmedabad, India, for example, is sinking at a rate of more than 20 millimeters per year.

China's coastal areas are the most concentrated areas of population and cities, which are most deeply affected by human activities, and the groundwater level declines, forming underground funnels, resulting in surface subsidence; In addition, the high-rise buildings increase the bearing capacity of the foundation and accelerate the settlement of the foundation.

80% of the 96 cities and regions of land subsidence in China are coastal areas, such as Tianjin, Shanghai, Suzhou, Changzhou, Wuxi, Jiaxing, Ningbo, Zhanjiang and Taipei. The cumulative settlement is 480 2780 mm, and the annual settlement rate is 10 56 mm.

For example, between 1921 and 1992, the average land subsidence rate in the urban area of Shanghai was 24 mm years, and in 1957 and 1961, the average land subsidence rate was 110 mm years. Through the control of groundwater pumping and recharge measures, the average land subsidence rate in Shanghai was 59 mm, and the average land subsidence rate in 1972 and 1992 was as high as 290 billion yuan.

Land subsidence will also cause sea levels to rise and increase the risk of flooding. This finding can help affected communities and decision-makers identify the potential for severe collapse and respond accordingly.

Rising sea levels will shrink coastal land areas, affecting where coastal landers live around the world.

The rate of sinking in coastal cities around the world is higher than the rate of sea level rise, which is related to global warming.

On September 12, it was found that a study showed that there was a sea level rise in coastal cities, several of which were relatively populous, and the rate of slag change and sea level rise had changed, even exceeding the rate of sea level rise. Because on a global scale, the rate of sea level rise is also relatively high, which can reach millimeters, some of which are related to climate change, mainly caused by the melting of ice and snow, in many places there have been groundwater pumping and natural gas and oil extraction, and some heavy building compacted sediments have also appeared to cause land subsidence, a process also called land subsidence.

On a global scale, it can be found that the rate of sea level rise is relatively fast, the rate of rise can be faster every year, and it is very large, partly because it is related to weather changes, mainly because of climate changes and the melting of snow and ice, which is caused by these conditions, and in some places there is a situation of groundwater extraction. Among them, 44 cities have the fastest subsidence rate, because the sea level rise rate is faster, whether it is Southeast Asia or South Asian cities, the sinking rate is relatively fast, especially in some places can sink more than 20 mm.

According to the researchers, the rate of subsidence is now variable and will continue until 2030, some places may be submerged, and if the land subsides, there will be places where the land will be below sea level. The extent of the flooding, as well as the fact that the elevation map is unreliable in many areas, and there are inland areas in the city that sink more quickly, which can also exaggerate the impact of land subsidence, which is also an important driving factor.

The main reason for this phenomenon may be that the extreme weather changes in the current era of rubber noise lead to the emergence of high temperatures, which leads to the melting of glaciers, so this happens.

Mainly because global warming has led to the melting of glaciers, the extraction of groundwater, the extraction of natural gas, and the sinking of land.

Globally, sea levels are rising about millimeters per year on average, and a large part of this is caused by melting ice due to climate change.

Sea level rise is a slow-onset natural disaster for human survival and economic development. It is precisely because it is slow-onset that it is often not taken seriously. Rising sea levels are harming coastal populations.

It has increased the frequency of catastrophic storm surges in coastal areas, intensified flooding, erosion of coastal lowlands and coasts, and coastal retreat.

Water pollution in coastal areas, salinization of farmland, increased tidal range, and strengthened wave action have weakened the capacity of coastal protective dikes, forcing designers to improve engineering design standards and increase project funding, which will also aggravate the seawater intrusion of estuariums, increase the difficulty of sewage discharge, and destroy the ecological balance.