What does a reservoir do? Why do humans build reservoirs?

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 seasonal distribution of water resources in China is unbalanced, and it is necessary to build reservoirs to store water during flood seasons and release water during dry seasons to regulate the amount of river water. The purpose may be a little different in each place, but one thing is certainly the same: flood control and flood control, along with some fish!

In the rainy season, it can store floodwater, try to reduce the low-lying places to return too much rainwater, play the role of flood control, in addition to the rainy season after the dry season in the south of the year is also particularly long, so, when the dry season to release water to fight drought to protect the smooth growth of crops.

I am a southerner, especially can understand the pain of the common people in the dry season without water resources, when I was a child, some of the drought to the people did not have the well water to drink, the crops really did not harvest, so the southerners love to fence the mountains to make a small reservoir, for the drought, usually in the fish raised. We still drink well water in rural areas, and there is no running water, so there will still be a shortage of water every year when the drought is severe.

Lots of large and small reservoirs. At its most basic, it can store water and prevent the entire river from drying up. It can also prevent floods, store water in the dry season, and drain water before the rainy season comes, effectively resisting floods, because generally there will be warning areas when reservoirs are built, and the nearby people's houses will be relocated in advance.

Large reservoirs can also generate hydroelectric power. We have Xiaolangdi Reservoir here. The main thing is to intercept the water of the Yellow River and generate hydroelectric power.

There are also several small reservoirs, such as the Estuary Reservoir and the Python Estuary Reservoir.

When I was a child, I was prone to major floods in the summer, but now there are no such cases. Because in the spring, the Xiaolangdi Yellow River Reservoir will have a drainage and sand transfer, and the small reservoir will drain water in an orderly manner during the frequent rainy season. It is very effective in stopping the flood disaster.

If you want to see the sand drainage at the bottom of Xiaolang, you can see the works I sent, and I will also introduce the scenery of Yugong Yishan, Wangwu Mountain and Taihang Mountain.

While the process of industrial modernization is accelerating, resource and environmental constraints are tightening, energy is tense, and the pressure on the ecological environment continues to increase. Accordingly, the development of water resources is undoubtedly of great significance for solving the problem of energy shortage in the development of the national economy, improving the ecological environment, and promoting the coordinated and sustainable development of the regional economy. The main purpose is to improve people's work and life greatly, not just to be dominated by floods, we want to transform nature to a place that is beneficial to human beings, not to mention that the electricity we use in our lives is hydroelectric power, and there are many agricultural irrigation and drinking water problems are used in reservoirs, not just who is stored.

Benefits of the reservoir: First, the dam can provide electricity, and China's Three Gorges Reservoir is expected to generate the same amount of electricity as 18 nuclear power plants; In Norway, more than 98% of energy comes from hydropower, which Norwegians have benefited from in the long term. Secondly, reservoirs can also provide convenience for irrigation, drinking water, flood control, navigation, etc.

Water is stored during the flood season and released during the dry season, so as to adjust the river water volume in each season, regulate the water volume, improve the flood prevention and drought resistance capacity, and expand the irrigation area.

1. Benefits of building dams:

1. Regulate river runoff and improve the climate of the reservoir area (reduce the temperature difference and increase the air humidity);

2. It can be used for flood control, shipping, power generation, irrigation, aquaculture, tourism, etc.

Second, the disadvantages of building reservoirs:

Clause. 1. Impact on the upstream of the reservoir area.

1. The reservoir stores water and sediment, the water quality declines, and the number of migratory spawning organisms decreases;

2. Flooding farmland and residents leaving their hometowns.

Clause. 2. Impact on the reservoir area.

1. The water quality in the reservoir area is eutrophicated, and the rise of water level makes the groundwater rise and the evaporation intensifies, resulting in the salinization of cultivated land in the reservoir area;

2. The impoundment of water increases the pressure in the reservoir area, which may induce new geological disasters, such as the reservoir area;

Clause. 3. Impact on the downstream of the reservoir area.

1. The downstream sediment deposition decreased by 4102, the organic matter deposition decreased, the runoff decreased, and the water supply for industrial and agricultural production and domestic life was scarce;

2. The estuary is slowed down due to sedimentation, coupled with wave erosion, which makes the delta (coastline) retreat and threaten the coastal area;

3. The reduction of nutrients in the estuary affects the survival of animals and plants.

The main purpose of the construction of reservoirs is to reconcile the uneven seasonal distribution of water resources.

In addition to this, the construction of reservoirs has the following functions:

1. The role of flood control: the reservoir is an important measure for flood control in China, and the reservoir can be used to store the flood and reduce the peak flow of the downstream river, so as to achieve the purpose of reducing and reducing flood disasters.

2. The role of flood detention: when there is no gate control on the spillway of the reservoir, the reservoir can play the role of temporary detention of floodwater.

3. Flood storage: In the flood season, keep some water in the reservoir, and then wait until the drought season, put in some water, so that the demand for water in the drought period can be well alleviated.

4. Irrigation function: Because most reservoirs can store a large amount of water resources, these water resources can be used to irrigate crops well.

5. Power generation: The use of reservoirs can be used to generate electricity very well, so it has a great effect, and has a very great impact on our lives.

6. Shipping: The use of the reservoir can save the corresponding cost to a certain extent, and also save a lot of time, so from these aspects, the reservoir is of great significance.

7. Tourism: The scale of the construction of the reservoir is very large, so the construction of the reservoir has attracted many tourists to visit and visit, so it has rich tourism resources.

1. The water retention of upstream building reservoirs can adjust the water flow, reduce the impact of floods on the middle and lower reaches, and have a flood control effect on low-lying cities.

2. Solve the problem of local water use and rationally allocate water resources, such as the South-to-North Water Diversion Project can solve the problem of water shortage in the north, increase the carrying capacity of water resources, and improve the efficiency of resource allocation.

3. After the reservoir is impounded, the upstream river channel is wider and deeper, which can improve the upstream shipping conditions and reduce the impact of the season on shipping.

4. Hydropower is a sustainable Qingji energy source, which can reduce the use of fuel oil and coal, such as the Three Gorges Hydropower Station to effectively solve the energy crisis in southern China and drive rapid economic growth.

5. Taking Dujiangyan as an example, it is responsible for the irrigation of farmland in the Sichuan Basin, the water supply of enterprises and cities in Chengdu, as well as flood control, power generation, water drifting, aquatic products, aquaculture, forest fruits, tourism, environmental protection and other target comprehensive services, and its irrigation area scale ranks first in the country.

A reservoir is generally defined as "a hydraulic structure that holds and stores water and regulates the flow of water, which can be used for irrigation, power generation, flood control, and fish farming." "It refers to an artificial lake formed by the construction of a barrage at the mouth of a ravine or river. Sometimes natural lakes are also called reservoirs (natural reservoirs).

The size of the reservoir is usually divided according to the size of the reservoir capacity, which is divided into small, medium, large, etc.

1. The advantages of building a reservoir:

regulate river runoff and improve the climate of the reservoir area (reduce temperature difference and increase air humidity); Flood control, shipping, power generation, irrigation, aquaculture, tourism, etc.

2. Disadvantages of building reservoirs:

1) Increase the frequency of geological disasters in the reservoir area, and the construction of reservoirs may induce the occurrence of geological disasters in the reservoir area and nearby areas.

2) Sediment accumulation. The sediment accumulation in the reservoir area has caused the actual storage capacity of the reservoir to continue to decrease.

3) Soil salinization in the downstream land, continuous irrigation raises the groundwater level, bringing the salt in the deep soil to the surface, coupled with the high content of salinity and various chemical residues in the irrigation water, resulting in soil salinization.

4) The water quality in the reservoir area and its downstream deteriorates, the water surface area of the reservoir area is large, a large amount of water is evaporated, and the salinization of the soil increases the salinity and chemical residues in the soil, which pollutes the groundwater and improves the salinity of the downstream river water.

5) The impact on the downstream river, due to the change of water potential and sediment content, may also change the flow direction and alluvial degree of the downstream river section, resulting in serious erosion and erosion of the riverbed, and the retreat of the river (sea) estuary to the land.

Classification of reservoirs:

According to their location and formation conditions, reservoirs are usually divided into three types: valley reservoirs, plain reservoirs and underground reservoirs. Most of the valley reservoirs are formed by barrages to cut off the river valley and intercept the river runoff and raise the water level. Plains reservoirs are reservoirs formed in plain areas by using natural lakes, depressions, and rivers by building embankments and control gates.

Groundwater reservoirs are reservoirs formed by the pores and natural karst caves in underground aquifers or by the construction of underground aquifers to intercept groundwater.