Are there freshwater rivers in the ocean? Are there freshwater areas in the ocean?

When people sail on the vast sea, the biggest regret is to watch the clear blue water but not drink to quench their thirst. Therefore, the sailors and fishermen who live on the ocean all the year round long to have such a treasure like a well, as long as this treasure is put into the sea, the bitter and astringent sea water will become sweet and delicious fresh water.

The first to come up with this bold and beautiful idea was a man named Zhou Mi in the Song Dynasty of China.

He wrote a book called "Miscellaneous Tales of Fresh Water", which describes the story of a "baby" who can make fresh water.

In the story, there is a grocery store with a peculiar thing in the corner of the yard. It is said to be like a vat, but it has no bottom; It is said to be like a chimney, but it is too thick. If you look closely, you will find that it is neither bamboo nor wood, nor metal nor masonry.

The shopkeeper couldn't name it or what it was used for. So, keep leaving it in the corner.

One day, a seafaring merchant was passing by to the grocery store and found it. He looked and looked, touched and touched, reluctant to leave.

The shopkeeper approached curiously and asked the merchant if he would buy it. The merchant hurriedly said: "Buy! How much silver do you want? ”

The shopkeeper wanted to knock on the bamboo pole of the maritime merchant, so he said, "This is the ancestral item of my shop, and it will not be sold unless it is ten taels of silver." ”

The merchant didn't say a word, paid ten taels of silver, and asked someone to carry the strange thing away.

The shopkeeper wondered, "What is the use of spending so much money on this?" ”

The merchant said: "This is a treasure, and its name is 'Sea Well', which is a well that specializes in fresh water." At sea, as long as you put it in the sea, you won't have to worry about having no fresh water to drink. ”

After saying this, the merchant took out another hundred taels of silver and gave it to the shopkeeper.

After all, this is people's beautiful imagination and legend. With the development of science and technology, people have built a seawater desalination machine today, turning the imagination of "painting wells to quench thirst" into reality. But is there fresh water in the vast sea?

In 1489, the Italian-born navigator Christopher Columbus, after his third voyage across the Atlantic, told the story that when his ship sailed outside the mouth of the Orinoco River in Venezuela in South America, the ship's fresh water was almost exhausted, and thirsty crews fought over a little fresh water. In the fierce battle, one of the crew members was thrown into the sea.

The sympathizer of the crew hurriedly picked up the lifebuoy, and was about to throw it to the crew member who had fallen into the water, only to hear the crew member who fell into the water shouting in amazement: "Fresh water! Fresh water!

From time to time, he drank from time to time, waved his arms and shouted. The crew immediately stopped fighting, some holding buckets to draw water, and some simply jumped into the sea to drink enough.

From this story, we know that there is a freshwater area in the sea near the mouth of the Orinoco River in Venezuela.

The oceans also contain considerable freshwater resources. For example, there is a small island called Caiyu in the east of the Gulei Peninsula in southern Fujian, and there is a strange freshwater area on the sea surface 500 meters away from this small island, called "Yudai Spring"; Between Florida and Cuba in the United States, there is also a circular freshwater area with a diameter of 30 meters on the sea, and the water color and temperature are different from the surrounding area, which is called "freshwater well". Some experience has been achieved and success has been achieved in the exploitation of seabed freshwater abroad.

For example, Hawaii in the United States used remote sensing technology to find many freshwater outcrops on the seabed, which solved the problem of insufficient fresh water in Honolulu, Hawaii. Greece drilled more than 1 million cubic meters of fresh water wells in the Aegean Sea to irrigate 300 square kilometers of dry land along the coast.

Freshwater fish flow into the ocean for the following reasons:

1.Flooding: During floods, rivers are at high levels**, currents are rapid, and some freshwater fish can strayed into the ocean. This usually happens after a heavy rainstorm or heavy rain.

2.Foraging for food: Some freshwater fish will voluntarily leave the freshwater environment and travel through saltwater areas to obtain more food resources. For example, some bass species leave the freshwater environment as they grow and enter the ocean in search of suitable food for their growth.

3.Breeding migration: Some fish migrate during the breeding season, and some of them choose to enter the ocean. They travel to the marine environment to lay eggs or in search of more suitable conditions for hatching and growing.

4.Natural evolution: Some freshwater fish species have adapted to the marine environment and become brackish water fish during the evolution of the Lingling Mountains over a long period of time. These fish are able to move freely between freshwater and seawater, adapting to different salinities.

It is important to note that the entry of freshwater fish into the ocean is a natural phenomenon, and not all freshwater fish have this behavior. At the same time, there are also freshwater fish species with special limbs, such as the Sri Lankan largemouth, which has the ability to move freely between freshwater and seawater.

Freshwater fish cannot live in seawater, because their gills do not have a desalination device adapted to seawater, and the salt concentration in freshwater is lower than that of seawater, which will cause freshwater fish to lose water in the trapped body and burn quickly, and eventually die. So, freshwater fish don't swim into the ocean.

There is a small island on the Gulei Peninsula in southern Fujian in China, and there is a strange freshwater area on the sea surface about 500 meters away from the island, which is called "Yudai Spring". The sea area between Florida and northeastern Cuba in the United States has a very high salt content, but in the middle there is a large area of sea with a diameter of 30 meters, which is freshwater. The color, temperature, and waves of this water are the same as the surrounding seawater, and people call it "freshwater wells".

Why are there "jade belt springs" and "freshwater wells" in the ocean? After the field investigation by experts, it was found that there is a fountain at the bottom of the "Yudai Spring" and "Freshwater Well", which can continuously spew out a strong flow of fresh water. When the spurted fresh water washes through the seawater and occupies the corresponding position, a freshwater area is completely different from the surrounding seawater.

Why is there fresh water at the bottom of the sea? Because a long time ago, some of the seabed may have been a land mass, and on land there were many rivers and a large number of lakes that created favorable conditions for the formation of underground aquifers. Later, after many sea and land migrations, the water in it remained intact, just like the discovery of the ancient channel of the Yangtze River under the east seabed of China.

Freshwater scarcity is a major problem facing mankind in the world today, and the development of seabed freshwater resources will certainly solve the water shortage situation of offshore islands and coastal cities.

Yes 1

For example, Arctic and Antarctica, aren't they all freshwater in the ocean?

Yes, the Yangtze River outlet flows out of fresh water.

No, because there are many metal ions in seawater, the osmotic pressure is much greater than that of freshwater. Therefore.

Definitely not, can you live in the water, the same.

It won't be too long to live

<> to understand why seawater is salty, we have no other scientific reason to explain it. To put it simply, when fresh water falls from the sky in the form of rain, water circulates.

Here we go. It eventually ends up in rivers, lakes and oceans, where it soon evaporates to form clouds and repeats the cycle.

If you dig deeper into each stage of the water cycle, you'll see how salt mixes into the water. Rain in the sky is fresh water, that's for sure, because salt doesn't evaporate like water, but it's not 100 pure either. It mixes with the atmosphere during its descent, making it slightly acidic.

Once it reaches the surface of the earth, it flows across the land through rivers, lakes and seas. As it crosses the land, the acidity of the water destroys the rocks and soils, trapping the ions in those rocks and soils and carrying them to the sea. About 90 of the ions are sodium ions.

or chloride ions. When these sodium ions and chloride ions are combined, they form the salts we are most familiar with.

Freshwater that reaches the ocean evaporates to form clouds. However, sodium, chloride and other ions do not evaporate into the air, and over time they accumulate to give the ocean its characteristic salty taste. The seafloor releases more dissolved minerals, including more sodium and chloride.

Further promotes the salinization of seawater.

How much has runoff and deep-sea hydrothermal vents increased the salinity of seawater since the ocean was formed? If you could extract this salt from the sea and spread it flat on the surface of the land, it would be a salt layer about 153 meters thick, and the land would add about 40 stories to its height.

But there's a question: if the ocean gets its salt from runoff, why are lakes still relatively unsalted? For most lakes, water flows through the lake into and out of the ocean.

The salt ions in the water are constantly washed into the ocean, and the current is still the current, and the ocean is like all the minerals of rivers and lakes"Dumping ground"All the same, in the end, it all comes together here. There is no outflow of water bodies, such as Israel.

The Dead Sea, or the Great Salt Lake of the United States, maintains the same or even higher salinity than the ocean. It is conceivable that if this flow is from the ocean to the rivers and lakes, then it is likely that the oceans will be fresh water, and the rivers and lakes will become salt water.

If we think deeper, we will find problems. With the continuous dumping of salt in rivers and lakes and the continuous release of hydrothermal fountains on the seabed, does the entire salinity increase indefinitely? There is also the salt on the land that is constantly washed into the ocean, so the ocean.

Is the mass of land constantly increasing, and the mass of land is not decreasing? After 10,000 years, millions of years, or even 100 million years, what kind of scene will eventually evolve into? Unknown. Leave it to you in front of the screen, study hard, and make progress every day.

Become a great scientist and help out!

Children know that sea water is salty. But did you know that there is also fresh water in the ocean? The answer is yes.

In the east of Gulei Peninsula in Zhangpu County, southern Fujian in China, there is a small island rich in seaweed called Caiyu, there is a strange freshwater area on the sea surface about 500 meters away from the island, called "Yudai Spring", fishermen and boats in this area replenish fresh water here.

To the east of the Florida Peninsula in the United States, not far from the coast, there is a peculiar body of water with a diameter of about 30 meters. Its color is different from that of the surrounding water, and it looks as if it has been dyed a round green on a dark blue cloth. Pick up a puddle and taste it, ho, it's really cool, and it's not salty at all.

It's no wonder how there is such a well-defined freshwater well in the middle of this vast ocean.

It took a long time for scientists to figure out this strange phenomenon. It turned out that it was a gift from the land to the sea. Scientific research has found that the bottom of this strange body of water is a small basin like the bottom of a pot.

The basin is about 40 meters deep in the middle and 15 to 20 meters around it. There is a freshwater spring in the basin**, which is constantly gushing upwards with water as clear as nectar.

Just like the Baotu Spring in Jinan City, Shandong Province, China, it will never be exhausted day and night. Moreover, the amount of water gushing out of this freshwater spring is 40 cubic meters per second, which is much larger than the largest spring on land. In this way, the spring water gushes out of the sea day and night, and the salt water is not stained.

Under the influence of wind currents, it rises diagonally from the spring to the surface of the sea, forming a "freshwater well" in the sea.

Fresh water is only available on land, so how did a fresh water well come out of the sea?

Experts have found that they appear because there is an underwater fountain on the bottom of the sea in the area, from which a strong stream of fresh water is continuously spewed, and when the fresh water spouts out of the seawater and forms a certain scale, a freshwater area will appear in the middle of the seawater.

Freshwater fountains on the ocean floor appeared because some parts of the ocean may have been a land mass hundreds of thousands of years ago, and the rivers and lakes on land created favorable conditions for the formation of underground aquifers. Later, after many changes between land and sea, the land became the sea, but the aquifer was retained, resulting in fountains gushing out from the seabed.

Whenever the activity of the submarine fountain intensifies, the ejected material reacts with the calcium bisulfate in the seawater to precipitate carbon dioxide. Therefore, there is a close relationship between the activity of submarine fountains and the change of the earth's climate.

At the mouth of a large river that flows into the ocean, a freshwater area is often formed due to the excessive amount of water. For example, ships sailing near the mouth of the Congo River on the west coast of Africa, although they are nearly 100 kilometers away from the mainland, can get fresh water in the Atlantic Ocean.

It turned out to be because there was a wide submarine valley beneath the sea. The vast amount of fresh water from the Congo River continues to flow from the mainland along the river valley, creating a freshwater zone on the surface of the ocean. The water that passing ships get from outside the mouth of the Congo River is not seawater, but the water of the Congo River. Fresh water!