70 % on the surface of the earth is water, 30 % is land, and there are many rivers and lakes on the land. There are more than three million lakes of different sizes in the world, and they each have different characteristics. The lake is like a bright pearl inlaid on the surface, and they play an important role in human life. Do you know how the lake is formed?
The lake is formed by the accumulation of water on the land. Under the action of crustal structure movement, glacier, and river stasis, the surface forms many concave land, and the accumulated water has become a lake. Under the influence of natural conditions, the lake basin, lake water, and material interaction and mutual constraints in the lake, and the lake continues to evolve.
Lake water is an important part of global water resources. The total area of lakes on the earth is about 205,8700 square kilometers, and the total water volume is about 176,400 cubic kilometers. The lake is constantly updated, and the update cycle of different lakes is different. The length of the lake renewal cycle is related to its volume is related to the running of the lake and the annual runoff out of the lake.
As part of the nature ecosystem, lakes are closely related to the relationship between biospheres, atmosphere, and rock rings, and it is an indispensable embellishment in nature. So, what are the role of lakes? Today, let's take a look at the meaning of the lake.
1. Lakes can provide water resources and salt resources
As an important part of the wetland ecosystem, lakes can provide water resources such as industrial production water, people's living water and agricultural irrigation water, and ensure people's production and life needs. Lake is an important place for human beings to survive.
In addition, the lake can be divided into saltwater lakes and freshwater lakes according to salinity. The water and salt content in the salt water lake is high, and a certain amount of salt resources can be formed after drying and evaporating. It can not only provide the salt required for human beings, but also provide economic income for humans.
2. The lake has the functions of regulating and purifying
Lakes can play a good role in regulating runoff and regulating climate. There are often rich plants around the lake, and there are some plants in the lake. These plants will perform photosynthesis, absorb carbon dioxide, and release oxygen. Lakes can also absorb various dust and bacteria in the air, purify the air, reduce environmental pollution and improve air quality, thereby improving the regional ecological environment and maintaining ecological balance.
3. The lake can maintain biodiversity
The lake plays an important role in regulating floods and controlling soil erosion. It can reduce the flood disasters to a certain extent and maintain the stability of biological diversity and ecosystems.
4. Reflect climate change
The lake itself is sensitive to global climate change. In a huge system of human and nature, lakes are the connection points of the interaction of the surface system of the earth, and an important part of the land water ring. Lakes are closely related to biospheres, atmospheric rings, rock rings, etc., and have special functions that regulate regional climate, record regional environmental changes, and maintain the balance of regional ecosystems.
