Will the construction of reservoirs by humans have an impact on the natural environment?

Reservoirs are the protection of the environment. Water conservancy is the lifeblood of agriculture, and in addition to ensuring the harvest of crops in drought and flood, reservoirs also have an important function of storing water during the flood season and releasing water during drought, which not only prevents the damage of floods to the environment, but also prevents the damage of drought to the environment. Such as:

Xiaolangdi Reservoir of the Yellow River.

Since its completion, the lower reaches of the Yellow River have not been cut off and no serious floods have occurred.

I don't know that the reservoir is a place to store water, so when the water is big, the water is stored, so as to save the flooding of farmland. In times of drought, you can release water to relieve the seedlings and ensure the harvest! I don't know if it's damaging to the environment!

Everything is divided into two, and there are pros and cons, but the pros outweigh the cons. For example, the Yellow River and the Yangtze River used to be flooded. For two thousand years in recorded history, the Yellow River was diverted.

26 times, 1000 breaks.

The source of water life, if the reservoir is well managed, it can also provide domestic water, and it can kill more than one stone. If no one takes care of the garbage in the pond and destroys the environment, this is a human problem. First of all, from the perspective of human beings, the construction of reservoirs must be advantageous

It can change the local ecological environment; It can provide a water reserve for farming. It is possible to generate electricity. It can increase the humidity of the air.

And so on. Secondly, from the perspective of nature, everything that violates the laws of nature is bad. Nature is a living being.

It has its own inherent rules of operation. Fortunately, now we human beings have gradually understood that respecting nature and conforming to nature. is a welcome step forward.

The fact that this question can be raised here is evidence of this progress.

Reservoirs are human agency in nature.

is an embodiment of this. In history, there have been countless inventions and creations with the sky, which are the transformation of the natural world and human civilization.

results. Of course, everything is dialectical, and there are pros and cons. However, for a specific thing, it is necessary to make a specific analysis.

Reservoirs are an important means for human beings to transform nature, and they are an invention and creation, with both advantages and disadvantages. As long as there is scientific and rational planning and objective laws are followed, history has proved that the vast majority of large and small reservoirs built by human beings have more advantages than disadvantages.

The construction of reservoirs by humans will have an impact on the natural environment, because it occupies a lot of farmland and land, many aquatic organisms cannot migrate, and it will also cause some pressure on the local geographical structure, resulting in various geological disasters.

It is likely to destroy and flood a large number of precious farmland land, submerge a large number of cultural relics and buildings, and destroy the local ecological environment.

There are many roles. It can detain floods, store floods, and at the same time prosper, generate electricity, and store water. Because there are times when flash floods, mudslides, and torrential rains occur, reservoirs are built to avoid waste and all the water is stored for future use.

The role of the reservoir is very large, it can store a lot of water, and in times of drought, this water can also save people's lives. And reservoirs can also play a role in protecting people. That's why humans have to build reservoirs.

It can store some water, but it can also prevent flooding, it can supply water when there is a shortage of water, and it can also irrigate the land. Building these things can effectively fight some weather problems, and it is to make people's lives better and more secure.

The role of flood detention, flood storage, prosperity, irrigation, water supply, shipping, fishery, and tourism is precisely because the reservoir has so many benefits, so the reservoir will be repaired.

The reservoir maintains the ecological beauty. Writer Yang Daxia Yang Ke said.

Reservoirs refer to man-made amber, most of which are hidden deep in the mountains, and can be divided into three types according to the size of the lakes, most of which have the ability to store floodwater. In the event of bad weather, the role of the reservoir is very large, do you want to tell you about the role of the reservoir today?

Reservoir is one of the measures used for flood control in China, and building a reservoir in the upstream river of the flood control area can block the flood and reduce the flow of water downstream, so as to achieve the purpose of reducing flood disasters. Moreover, the reservoir has the role of flood detention and flood storage, and in the summer there will be heavy rainfall in most places, and the reservoir will come in handy at this time, which can store a certain amount of rainwater. At peak water use, reservoirs can also provide drinking water for people.

When the upstream area ushers in heavy rainfall, the amount of water is very large, at this time, the reservoir will change from the flood discharge mode to the flood control mode, and maximize the storage capacity vacated before, so that all the sedimentary precipitation is blocked for the upstream, so that the downstream river flood pressure is much smaller. However, the discharge of the reservoir is not unloaded, and the upstream gate should be opened to control the size of the flow according to the water potential of the downstream, and the precise dispatch should be carried out to reduce the pressure on the downstream to the greatest extent.

Many people think that the flood outbreak in the downstream river is caused by the discharge of the reservoir, but in fact, if there is no flood water unloaded by the reservoir in the early stage, it will only be more and cause the flood because of the excessive rainfall. There is a limit to the amount of water that can be intercepted by a reservoir as a huge basin, and if the amount of water exceeds the reservoir's flood control capacity, continuing to remain in the reservoir may increase the risk of raising the reservoir's own inventory level. If the rainfall in the upstream area increases and the time is extended, the demand for fruits will continue to increase, and the water level will continue to increase, so the water conservancy department will make fine scheduling according to the changing trend of the upstream and downstream water conditions of important reservoirs in important areas to ensure safety as much as possible.

First of all, the reservoir is generally expressed as a water conservancy engineering construction that regulates flood water storage and regulates the flow of water, which can be used for irrigation, power generation, flood control and fish farming, which refers to the manpower lake water generated by the construction of barrages in narrow areas of canals or rivers. After the completion of the water conservancy project, it can have the functions of flood control, water storage and irrigation, power supply, power generation, and fish farming. Sometimes natural lakes are also called water conservancy hubs (pure natural water conservancy hubs).

The scale of operation of water conservancy hubs is generally divided into small, medium and large according to capacity.

Protecting the environment, protecting the water, avoiding downstream hazards, avoiding downstream inundation, can better protect the surrounding land, better control the flow of water, this is done to make people better survive and avoid floods.

The role of the reservoir is very large, and the reservoir can play the role of flood storage and flood discharge. Reservoirs are built to discharge floods during flood seasons. Avoid natural disasters and ensure agricultural production.

The main link in the construction of reservoirs that affects the water cycle is surface runoff.

The various parts of the water cycle include:

One: Offshore internal circulation.

Evaporation – precipitation.

Two: onshore internal circulation.

Evaporation, transpiration of plants – precipitation.

Three: sea and land circulation.

Evaporation - water vapor transport - precipitation - surface runoff, underground runoff (return to the ocean) Possible disasters from the construction of reservoirs are:

1. Cause the rise of groundwater level, in arid and semi-arid areas, the rise of groundwater level may cause soil salinization, and in humid areas may lead to cold springs invading fertile fields.

2. Large reservoirs may trigger**.

3. After the completion of the barrage dam, the sedimentary environment of the river may be changed due to the decrease in the flow rate of the upstream river section, which may cause the change of the channel of the channel.

4. If the dam fails under the action of force majeure, it will cause a catastrophe to the downstream.

5. It may affect the reproduction of migratory fish.

Due to the deterioration of water quality and the slowing down of water flow, aquatic plants and algae spread everywhere, which not only evaporated a large amount of river water, but also blocked river irrigation canals. These aquatic plants are not only found throughout irrigation channels, but also invade the main river channels. They hinder the efficient operation of irrigation canals and require frequent mechanical or chemical cleaning.

In this way, the maintenance of the irrigation system is increased.

Upstream of the dam: Affected by the reservoir, the water level of the river has risen significantly, and the river flow rate is slower than before the construction; Downstream: Due to the regulation of the reservoir, the seasonal variation of river runoff is slower than that before construction.

After the dam is built, the water level of the river section where the reservoir is located rises, and the elevation difference in the basin where the original reservoir section is used as the erosion datum decreases, and the flow rate slows down, which will affect the river and the organisms in Dou Zhaoxiao. The accumulation of reservoirs also causes the groundwater table to rise, exacerbating waterlogging upstream.

The purpose of building a barrage dam is to raise the upstream water level, and when the quality of the water remains the same, increase the height of the water and increase the gravitational potential energy When the water flows down, the gravitational potential energy is converted into kinetic energy, and the more gravitational potential energy there is, the more kinetic energy is converted

The role of the dam is to hold back the high and make up for the low, that is, to store water during the flood period and reduce the possibility of flooding downstream; Water is released during the dry season to replenish the river so that there is not too little water in the river. In general, the amount of water downstream will decrease after the dam is built, but due to the regulating effect of the reservoir, the downstream flow of the river will be relatively stable and the flow rate will slow down throughout the year.

A large reservoir of three gorges as an example:

1: Destruction and flooding of a large number of precious farmland land, and various customs, culture, cultural relics and buildings.

2: Destroying the local ecological environment and preventing the migration of aquatic animals in the Yangtze River may make some rare species extinct.

3: It may lead to an imbalance in China's water resources and affect the entire Chinese networked water flow system.

4: Affect the local climate, is the local temperature is more mild and stable. Increased rainfall. Reducing the amount of water downstream can make it difficult to use water downstream.

5: The construction process of the reservoir itself and the filling of water after the construction of the reservoir cause additional pressure on the local geographical structure, which may lead to various geological disasters. Such as:

Small reservoirs such as those on the Yongding River.

1: It can lead to the interruption of the flow of the river, affect the downstream ecosystem, and the weather becomes dry and rainless.

2: Increase the pollution of the river because there is less water in the river.

That's all I can think of. Please forgive me that it may not be perfect.