The total area of ​​lakes on the earth is 2.7 million square kilometers, accounting for 1.8% of the land area. There are 35 lakes with an area of ​​more than 5,000 square kilometers. Finland has the most lakes and is known as the "Land of Ten Thousand Lakes", with more than 60,000 lakes of various sizes.

The lake is rich in fish, shrimp, crab, shell, etc. It is an important source of raw materials for aquatic products and light industry.

How are lakes formed?

1. Lakes formed by water storage in tectonic basins formed by internal crustal forces.

2. The crater is formed by the accumulation of water after dormancy, and the shape is circular or oval.

3. Landslides caused by volcanic lava, earthquakes, glaciers and landslides caused by debris flows block the riverbed, cut off the water outlet, and the upper reaches of the river accumulate water into a lake.

4. The lake water is formed by the potholes and moraine formed by the erosion of the glacier, blocking the water in the glacier trough.

5. Lakes formed by fluctuating and diverting rivers.

6. Parts of the bay are separated from the ocean due to sediment deposition.

7. A lake that evolved due to the closure of the bay by a sandbar.

Some lakes in the world are freshwater lakes and some are saltwater lakes.

Whether the lake water is fresh or salty depends mainly on the salt content of the lake. Natural water, including lake water, contains a certain amount of salt. Generally speaking, if the salinity of the lake water is less than 1%, then the lake is a freshwater lake.

If the salinity of the lake is higher than 1%, the lake is starting to become salty and can be classified as a lagoon within a lagoon. As the salinity continues to increase, the lake water becomes more and more salty.

If a lake has inflow and outflow, the salt in the lake water is not easy to accumulate, and the nature of the lake water can be maintained as fresh water. Called a freshwater lake.

Well-managed lakes have economic and tourism value.

For example, Königssee in Germany is located next to the small city of Hittsgaden on the border between Germany and Austria. Due to its proximity to the Alps, it is known as the cleanest lake in Germany.

The spectacular Penne Baker Bridge spans Lake Austin and is an ideal location for viewing the lake. The most popular recreational item for citizens is to take a boat tour of the lake and float on the green lake.

Many beautiful lakes are loved by people from all over the world and are willing to take the time to travel.

Lake water is an important part of global water resources. Lake water can be continuously renewed. The renewal period of different lakes varies. The length of the lake water replacement period depends on its volume and the annual runoff into and out of the lake.

The beauty that nature brings to us is different, and the lake is one of them.