Characterization of lakes, classification of the genesis of lakes

Lakes have different characteristics according to different reasons for their formation, as follows: 1. Tectonic lakes: They are lakes formed by water storage in tectonic basins formed by the action of internal forces in the earth's crust. It is characterized by a long, narrow lake, deep and clear water, such as Dianchi Lake on the Yunnan Plateau.

Erhai Lake and Fuxian Lake; Qinghai Lake.

Kanas Lake in Xinjiang, etc. Tectonic lakes generally have very distinct morphological characteristics, that is, the shores of the lakes are steep and developed along the tectonic line, and the lake water is generally very deep. At the same time, there are often a series of tectonic lakes arranged according to the tectonic line.

2. Crater Lake: It is formed by the accumulation of water after the dormant crater of the volcanic eruption, its shape is round or oval, the shore of the lake is steep, and the lake water is unfathomable, such as the Tianchi of Changbai Mountain.

With a depth of 373 meters, it is the deepest lake in China. 3. Dammed lake: The lava erupted by volcanoes, landslides caused by ** and landslides caused by glaciers and debris flows are congested on the riverbed, cutting off the water outlet, and the upper part of the river is accumulated into a lake, such as Wudalianchi and Jingpo Lake.

4. Karst lake: It is a lake formed by the long-term dissolution of carbonate strata through the long-term dissolution of flowing water, such as the sea of grass in Weining County, Guizhou Province. There is a sea view building in the suburbs of Weining, climb the tower and look out, only to see the blue waves in the lake, the beauty is charming; On the island in the middle of the lake, the green pavilion is exquisite, the flowers and trees are sparse, and it is known as a water park.

5. Glacier lake: It is a lake formed by the potholes and moraines formed by glacial erosion to block the water in the glacier trough valley. For example, Xinjiang Fukang Tianchi, also known as Yao Pond, is said to be the place where the Queen Mother bathes.

The Great Lakes of North America, Finland.

Many lakes in Sweden, etc.

Lake Type 1Lakes are classified according to their genesis (1) Tectonic lakes: They are formed by the action of internal forces in the earth's crust through water storage.

Hydrological characteristics of lakes 1The amount of water in the lake depends on the amount of water recharge and evaporation in the lake, depending on the climate. 2.Lake water level season.

Conditions for the outflow lake (Tutu Lake) to become an endorheic lake (1) Crustal movement: Qinghai Lake was originally an outflow lake, and later formed an inner lake due to crustal movement.

The formation process of salt lakes and the main characteristics of salt lakes (1) Formation process: crustal movement leads to rock fracture and subsidence, and the terrain declines.

1. The water flow is slow, and the water exchange cycle of the lake water is long;

2. The salinity is higher than that of the river;

3. The change of water quality composition is affected by the size of the lake.

4. Aquatic biological factors have a great influence on the gases and biologically generated substances in the water.

Lakes can be mainly divided into the following types. 1。Tectonic lake: A lake formed by local fractures or subsidence caused by crustal movements. This type of lake is called a tectonic lake, and it is characterized by its deep water and wide surface. China's Dianchi Lake and Qinghai Lake.

There is also Lake Tanganyika, which is famous in Africa. 2。Crater Lake: The crater after the eruption, the day is long, and the water accumulates into a lake.

Such a lake is called crater lake. The crater lake is mostly circular, with steep shores and deep waters. Such as Changbai Mountain Tianchi.

It's such a crater lake. 3。Lakes are formed when lava flows block river valleys. In addition, landslides, debris flows and other actions can also form lakes, which are called dammed lakes. Such as China's Jingpo Lake and the five lotus ponds.

are of this type. 4。Haicheng Lake: Due to the sedimentation of rivers or shallow seas, the local low-lying terrain is caused by the accumulation of water into lakes.

These lakes are called sedimentary lakes and are mostly found in river deltas and coastal zones. For example, Taihu Lake and West Lake in China are lakes formed by the gradual siltation of the bay and the isolation from the sea. 5。

Aeolian Lake: A lake formed by the wind erosion depression or low terrain between sand dunes formed by the action of the wind, called an aeolian lake. This type of lake is generally small in area, shallow in water, and moves with the change of water source, so it is also called a migratory lake.

There are such lakes in Xinjiang and Inner Mongolia in China. 6。Karst Lake:

In areas of soluble rocks (limestone, dolomite, etc.), dissolution lakes are formed by the dissolution of groundwater. These lakes are funnel-shaped, small, and scattered. 7。

Glacial lakes: Glacial lakes formed by glacial abrasion and the accumulation of moraines (detrital material that is carried and deposited with the movement of glaciers) and are characterized by a variety of shapes and twists and turns of the shore.

China's Qinghai-Tibet Plateau.

There is such a glacial lake distribution 8. Artificial lakes: lakes of special origin, artificially constructed reservoirs.

1. Color and transparency.

The color of the lake is generally light blue, blue, yellow-green, etc., which varies according to the amount of sediment, sediment particulate matter, and the type and quantity of plankton in the lake.

Transparency is generally related to the depth of the sun, the sediment content of the lake, the temperature and plankton.

2. Temperature. Solar radiation is the main heat of the lake's water**. The heat income is mainly based on the latent heat of water vapor condensation, the heat generated by the decomposition of organic matter, and the surface conduction heat. Heat loss is manifested in the outward radiation and evaporation of the lake water.

3. Chemical composition, which affects the chemical composition of lake water:

1) Under different natural conditions, recharge is divided into precipitation, surface runoff and groundwater;

2) differences in precipitation and evaporation;

3) whether the lake water is well discharged or not makes the process of salt accumulation very different;

4) The nature of the rocks on the shore of the lake, the reproduction status of aquatic organisms, etc.

With the development of the times, more and more people like to travel abroad and go to various places to explore different new things in Oak, but each place has its own characteristics, and there are many people who like lakes, but many people in Lunruzhou have no real understanding of lakes, such as the classification of lake genesis.

Lakes exist in various regions, but what is the classification of lakes In fact, lakes can be divided into freshwater lakes and saltwater lakes according to their nature, and can be divided into external and internal forces according to their genesis. Freshwater lakes and saltwater lakes should be understandable to everyone, the fish that grow in them are also different, freshwater fish and saltwater fish, in addition to the different types of lakes, it is formed in different ways, some are formed by volcanic eruptions, and there are some synthetic lakes or Fengcheng Lake.

The classification of the genesis of lakes is roughly divided into two kinds, one is the internal force, the other is the external force, the former is mostly formed by the **volcano, and the latter is generally formed by the river or the wind.

Lakes can be divided into tectonic lakes, crater lakes, glacial lakes, dammed lakes, karst lakes, river lakes, aeolian lakes, sea lakes and artificial lakes (reservoirs).

According to the discharge situation, it can be divided into outflow lake (throughflow lake) and inland lake.

According to the salinity of the lake water, it can be divided into freshwater lakes (salinity less than 1g l), saltwater lakes (salinity of 1-35g l) and salt lakes (salinity greater than 35g l).

There are many reasons why lakes form:

1.Due to the changes in the earth's crust, deep valleys appear on the ground, and lakes are formed after water accumulation, which is called tectonic lakes.

2.The erosion of glaciers causes depressions on the ground to form lakes and accumulate water into lakes, which are called glacial erosion lakes;

3.After the end of the glacier melts, the rocks and sediment carried by the glacier accumulate into a dam, and the lake formed by the accumulation of water above the dam is called a moraine lake.

4.what was once a bay evolved into a lake;

5.When a volcano erupts, magma flows into the river, cools and solidifies to form a dam that cuts off the river, and the water above the dam is impounded into a lake, which is called a volcanic dammed lake.

6.The lake formed by the accumulation of water in the crater is called the crater lake.

Due to the movement of the earth's crust, deep valleys appear on the ground, and lakes are formed after water accumulation, which is called tectonic lakes; 2. The erosion of glaciers causes depressions on the ground to appear and accumulate water into lakes, which are called glacial erosion lakes; 3. After the end of the glacier melts, the rocks and sediment carried by the glacier are piled up into a dam, and the lake formed by the accumulation of water above the dam is called a glacial lake; 4. The former bay has evolved into a lake; 5. When a volcano erupts, magma flows into the river, and after cooling and solidifying, it will form a dam that cuts off the river, and the water above the dam is stored into a lake, which is called a volcanic dammed lake; 6. The lake formed by the accumulation of water in the crater is called the crater lake.

There are many causes, but each one has a common premise: easy water harvesting, and the sum of stage evaporation + seepage + surface runoff is less than all the amount of water entering the lake.

Then ask how the environment is easy to collect water came about.

The result of tectonic movements in the earth's crust, such as local fractures, subsidence. (tectonic lake) crater (crater lake).

Due to lava flows caused by volcanic eruptions, or due to landslides and debris flows, the river channel is diverted and straightened, and the old river channel becomes a lake (river into a lake) and a wind erosion depression (aeolian lake).

Because the rocks contain soluble matter, depressions (dissolution lakes) are formed under the erosion of flowing water, and because of glaciation, or the accumulation of moraines left after the melting of glaciers (glacial lakes) is due to the erosion of seawater, and the accumulation of lakes (Haicheng Lake) reservoirs (artificial lakes) is formed not far from the sea