Why don t the confluence of the Yellow Sea and the Bohai Sea merge with the same seawater?

Because the density of the two seawaters is different. The Yellow Sea is larger, but there are few rivers entering the sea, and the Bohai Sea has the Yellow River inflow, and the water density is smaller, so there is a clear boundary at the confluence.

Take two identical cups and fill them with cold water, one of which is filled with salt and red ink. Cover one of the cups with cardboard, stand upside down on top of the other, align the rim, and remove the cardboard. If the red brine is on top, the two glasses of water will mix quickly; If white and fresh water are on top, the two glasses of water will be white and red and will not mix; If you're experimenting with hot water, or even boiling water, you'll mix quickly even if you start layering.

The temperature of the sea water on the surface of the earth is generally far from the boiling water (the Yellow Sea is generally about 24 degrees Celsius), so the case of extremely hot water is not considered. The sea water in the Bohai Sea has a large sediment content, yellowish color and low salinity; The Yellow Sea has a small sand content, a blue color and high salinity. At the same time, the Yellow River, Haihe River and other rivers such as the Bohai Sea, the surface of the Bohai Sea rises, and tends to move in the direction of the Yellow Sea, making the surface of the Bohai Sea higher than that of the Yellow Sea, forming an effect similar to the second experiment you did, (on the other side, the surface sea water of the Yellow Sea is also constantly renewed, and one of the Kuroshio will go north from the middle of the Yellow Sea and go straight to the direction of the Bohai Sea) Due to the continuous replenishment of surface seawater resources on both sides, the surface interface of the two seawater masses can exist stably for a long time, and it is easy to know that it is below the surface interface. The interface of the sea water will bulge in the direction of the lighter and yellower Bohai Sea.

Personal suggestion: It must be pointed out that if rivers such as the Yellow River suddenly dry up for a long time from now on, or if the Kuroshio suddenly disappears, this interface will also slowly disappear.

This is mainly due to the movement of ocean currents and the influence of seawater microorganisms.

Whenever we mention the sea, the first thing that comes to many people's minds is the clear blue water, and this image is the first sense of many people. However, in real life, not every sea is blue, some places will be dark blue or even black, some places will be blue or even bright blue, and the brightness of the sea water at different latitudes will vary.

1. The first reason is the movement of ocean currents.

We can try to observe the color of the sea at different latitudes, and when the latitude of a place is getting higher and higher, the color of the sea in that place will also be darker. Around the equator, the water is generally blue or even blue. However, in the Bohai Sea and the Yellow Sea at higher latitudes, the waters in the relevant areas are generally brown and blue.

If the latitude is further increased, the color of the sea near the Sea of Japan and the Arctic Ocean is generally dark blue. It is precisely because the degree of current movement at different latitudes varies that the movement of ocean currents directly determines the color of the sea water in the relevant sea area. <>

2. The second reason is the impurity of seawater.

We can observe the sea quality of the sea near Bohai Bay, because there is a certain amount of sediment in the sea water in the relevant area, so the color of the sea water is generally brown. When we look at the waters around Southeast Asia, we will find that the local speech movement will further clean up the impurities of the seawater, so the color of the local water will be blue. <>

3. The third reason is the microbial influence of seawater.

In areas with low latitudes, the local seawater is relatively transparent because the microorganisms in the local seawater are relatively active, and the microorganisms themselves will also clean up the impurities in the seawater. In China's Bohai Sea, Yellow Sea and East China Sea, because the microorganisms in these areas cannot clean up the suspended solids in the seawater in time, the visibility of the seawater will be relatively low, and the color of the seawater will naturally become darker. <>

There are three reasons why China's Bohai, Yellow and East China Seas do not have clear blue watersThe first reason is complex hydrological factors, the second is the presence of certain pollution, and the third reason is that the Yangtze River and the Yellow River carry a large amount of sediment into the sea. Although China is still muddy, the open sea is still very clear.

Hydrological factors. The transparency of the ocean is mainly related to the impurities in the seawater. The reason why China does not have very blue and transparent water needs to be analyzed from a geographical point of view.

First of all, one of the most important influencing factors is ocean currents, and the global circulation mainly includes the equatorial flow system, the radiation belt flow system and the western boundary flow system. From the geographical point of view of China, it is mainly located in the western border basin, and China's Bohai Sea, Yellow Sea and East China Sea are all located on this current system, and this region also has a unified name Kuroshio. The Kuroshio Ocean is darker in color and is predominantly blue-black.

The sea water here contains relatively few impurities, and there is plenty of sunshine. When sunlight hits the sea level, the light is scattered. Light is not completely transparent, and is mainly divided into three primary colors: blue, red and yellow.

When sunlight shines into the sea and scatters, when there are fewer impurities, red and yellow light will be absorbed, while blue light is scattered and becomes blue-black, so the overall transparency of the ocean is relatively low. If the ocean is too clear, it proves that the amount of hydrocarbons in the ocean is excessive, resulting in a large number of plankton not being able to survive, and the number of animals and plants in the ocean that feed on plankton is reduced, resulting in a decrease in fish and other animals. This is the truth that if the water is clear, there are no fish.

Sediment of the Yangtze River and the Yellow River. The Yangtze River and the Yellow River in China will carry a large amount of sediment before entering the sea, especially the situation of the Yellow River passing through the Loess Plateau. When a large amount of sediment and water enter the sea, it will definitely have a certain impact on the water color of the offshore ocean.

There is pollution offshore. In addition, it is not excluded that human pollution of the ocean and large-scale aquaculture will lead to the occurrence of red tides and other phenomena. However, with the protection of the oceans in our country, pollution no longer exists.

The reason for this is not pollution, but a combination of complex hydrological factors. The seawater we see every day is mainly the seawater along the coasts of the Bohai Sea, the Yellow Sea, and the East China Sea, and the seawater of the larger oceans is less transparent. But today we are talking about the difference in the transparency of China's seawater and the reasons for the seawater in other regions, so there is no distinction between coastal and oceanic ones, and they are unified into the East China Sea.

It may be due to the climate, so the moisture is not the same, the evaporation is also very fast, and the color is not the same.

China's four seas are the Bohai Sea, the Yellow Sea, the East China Sea, and the South China Sea, and only the South China Sea is relatively blue. It also has to do with latitude. The color of the sea is also the color of the sky.

The water of the Yellow River and the sea water can be combined!

It's just that under natural conditions, this process of integration,It is a process in which two water mass molecules penetrate into each other through the irregular thermal movement of the molecules

If the difference between the two water masses is greater (especially in terms of density), the slower the fusion will be.

In fact, similar phenomena occur not only in liquids, but also in gases.

Weather forecastDo you often hear cold air, cold waves? The strong cold air blows to the place where the warm air stays, and the two do not mix, but form an interface, along which the warm air is forced to rise, so the cold front is formed--- which is the phenomenon caused by the gas "not having time to blend".

Of course, when we encounter liquids that are difficult to blend, we can do work on them (such as stirring) to speed up the fusion process. There is a lack of this under natural conditions, and the Yellow River is still replenishing its water, so the river-sea boundary can be observed for a long time during the flood season. But once the dry season begins, the Yellow River loses its replenishment, and you can soon observe the fusion of the Yellow River and the sea.

The main reason why the Yellow River and the sea cannot be integrated is that the density difference between the two is particularly large, when the two liquid liquids blend with each other, they will form a very obvious sea peak, which also makes it appear a very peculiar landscape, producing obvious interfaces, which makes people marvel at it.

The main reason why the Yellow River and the sea do not blend is because there is a lot of sediment in the Yellow River, because the density of the water on both sides is different.

The sediment and other substances contained in the water of the Yellow River are extremely rich, but the Yellow River itself is also freshwater, which is different from the salt contained in the seawater, so when the water of the Yellow River is continuously injected into the Bohai Sea area, the seawater in this area is gradually diluted, and the salt and other substances contained in the seawater are also diluted. And when the material in the water is different, there will be a difference in density, and through the difference in density, density convection will also be formed, so there will be a clear dividing line in the ocean.

The sea is very calm, and the winds and tides on the sea surface are constantly changing, and when these factors converge, the boundary between the Yellow Sea and the Bohai Sea will also change. However, the sea is still in a state of non-fusion, so this strange sight appeared in the area.

The source of the Yellow River

The "yellow" of the Yellow River is actually sediment. Ancient books contain: "The Yellow River fights water, and the mud dwells in its seventh".

According to the analysis of modern measured data, the average sediment transport capacity of the main stream of the Yellow River is 1.6 billion tons, and the sediment content is 35 kilograms per cubic meter, which is the highest sediment content among the world's rivers. Ninety percent of the Yellow River comes from the Loess Plateau. The soil here is loose, easy to erode and disperse.

Every time a heavy rainstorm washes away, a large amount of water and soil is lost, and it rushes into the Yellow River.

The area above the Duoshi Gorge in Maduo County, Qinghai Province is the source area of the river, with an area of 10,000 square kilometers, which is a part of the Qinghai Plateau, which belongs to the wide valley belt of the lake basin and is above 4,200 meters above sea level. The basin is surrounded by majestic mountains, with Yaradadze Mountain in the west, Anima Qing Mountain (also known as Jishi Mountain) Kuanzhou in the east, Burhan Buda Mountain Range in the north, Bayan Kala Mountain and the Yangtze River basin in the south. At the western end of the lake basin, there is the ancient Zonglie, which is the birthplace of the Yellow River.

Clever cavity. The above content reference: Encyclopedia - Yellow River.

1.Introduce. The Bomeng Bird Sea and the Yellow Sea are one of the most famous seas in China, they are located on the eastern coast of China, and the city at the junction is a large port city in China.

The city has a rich history and culture, and is also an internationally renowned port city due to its proximity to two famous seas.

2.Location. The city where this intersection is located is a prefecture-level city in Shandong Province, with a geographical coordinate of 36° 04 north latitude', longitude 120° 22 E'。

Known as the "Pearl of the Orient", it is the second largest port city in China and the largest coastal city in the north, and its port cargo throughput ranks first in the country.

Second, fifth in Asia.

3.History and culture.

The city has a rich history and cultural heritage, and is a valuable cultural heritage. The city is home to numerous monuments, places of interest and cultural landscapes. Some of the most famous attractions include: Badaguan Bridge, Zhanqiao, Bathing Beach, etc.

4.Bohai Sea and Yellow Sea.

The city is at the confluence of the Bohai Sea and the Yellow Sea, each with its own unique characteristics, and is one of China's two most important seas, rich in marine resources and biodiversity. Here, you can see large fishing grounds, spectacular bays, peculiar coastlines, and much more. At the same time, it is also an important hub for goods from north to south of China.

5.Port city.

This city is an important port city in China, with abundant port resources and complete port facilities. It is one of the largest coal export ports and container ports in China, and is also an important import port for grain and oil products, and its international development degree is ahead of other cities in the country.

6.Economic development.

The city is an important economic center in China and is one of the cities strategically supported by the marine industry in the country's 13th Five-Year Plan. With the advancement of the national marine strategy and the continuous development of port construction, the city's economic strength has been rapidly improved. Its modern industrial parks, high-end manufacturing clusters, and thriving modern service industries all demonstrate the city's strong development potential.

7.Tourist attractions.

The city is also an important tourist city, and its tourism resources are very rich. The coast is rich and colorful, with many famous beaches, resorts and marine parks, such as Yantai Long Island, Yangma Island, Penglai Pavilion and so on. At the same time, there are many monuments, museums and shopping malls of historical or cultural value in the city to satisfy the needs of different tourists.

8.Summary. Located at the confluence of the Bohai Sea and the Yellow Sea, the city is an important port city and tourist city with rich history and cultural heritage.

Its geographical location is very superior, the port facilities are complete, the economic strength is strong, and it is also one of the key cities supported by the state for the development of the marine economy.

The Bohai Sea is China's internal waters.

It is the northernmost offshore sea of China, the inland sea of the People's Republic of China, and also belongs to the category of internal waters. The total length of the coastline is about 3,800 km. It is about 346 kilometers wide from east to west and 550 kilometers long from north to south. It covers an area of about 80,000 square kilometers and has an average depth of 18 meters.

The Bohai Sea is a nearly enclosed inland sea, which is bounded by the Yellow Sea in the east by the line from the Laotieshan Cape of the Liaodong Peninsula through Miaodao to the Penglai Cape at the northern tip of the Shandong Peninsula. The other three sides are surrounded by land, and the north, west and south sides are adjacent to Liaoning, Hebei, Tianjin and Shandong provinces and one city respectively. According to the topography, the Bohai Sea can be divided into five parts: Liaodong Bay, Bohai Bay, Laizhou Bay, ** shallow sea basin and Bohai Strait.

According to the "Encyclopedia of China, China Geography", the Bohai Sea is composed of Liaodong Bay, Bohai Bay, Laizhou Bay and ** Sea Basin, and the "Shandong Provincial Chronicles, Oceanography" also includes the Bohai Strait, a total of 5 parts.

The main rivers flowing into the sea are the Yellow River, the Liao River, the Luan River and the Hai River, with a total annual runoff of 88.8 billion cubic meters. The terrain is inclined from the coast to the ** and the strait, and the terrain is monotonous and gentle. There are remnants of paleocoastlines and paleochannels on the seabed.

The Bohai Sea is a Mesozoic and Cenozoic subsidence basin, and the basement is Precambrian metamorphic rocks. Quaternary sediments are up to 300,500 metres thick and are mainly terrigenous material.

The more well-known cities along the Bohai Sea include Dalian City in Liaoning Province, Tianjin City, Qinhuangdao City in Hebei Province, Yantai City (part of the Bohai Sea) and Penglai City in Shandong Province.

Geographical location. There are three main bays around the Bohai Sea, Liaodong Bay in the north, Bohai Bay in the west, and Laizhou Bay in the south.

The narrow waterway between the Bohai Sea and the Yellow Sea is known as the Bohai Strait. The waterway in the northern part of the Bohai Strait is known as the Lao Tieshan Water Channel. There are a number of islands in the southern part of the strait, which are collectively known as the Miaojima Islands.

The Yellow River, Haihe River, Liao River, Luan River and other rivers flow into the Bohai Sea. There are oil reserves in the Bohai Sea and the Bohai Sea in Shandong Province (Shengli Oilfield). Due to the sediment injection of the Yellow River into the Bohai Sea, the area is constantly decreasing.

The main islands are Miaodao Islands, Changxing Island, Xizhong Island, Chrysanthemum Island, etc.

Formation. The Bohai Sea is a Mesozoic and Cenozoic subsidence basin, and the seabed is a Precambrian metamorphic rock, and the Quaternary sediments are 300-500 meters thick, mainly terrigenous materials.

The above content refers to Encyclopedia - Bohai.