In ancient times, the Huai River flooded frequently, why is there no now?

In fact, there is not much difference between the ancient rain and the current rain, it may be said that the precipitation has changed slightly, but it is far from the degree of reduction in the frequency of floods caused by natural changesIt's just that we now have more and more means to prevent floods, and our dams are becoming more and more resilient, so there are fewer floods. <>

Generally speaking, there are dams blocked by reservoirs, although the river will flood periodically, but it will not flood to the extent that it affects the normal life of residents, because we are now more and more capable of infrastructure construction, our dams, our dams, waterproof capabilities,The flood prevention capacity is also getting stronger and stronger, basically increasing to the level of once in a century, which means that there will only be a real flood in 100 years, and the probability of flooding is becoming smaller and smaller. <>

In ancient times, floods were more likely to occur because there was no capacity to build new large-scale water conservancy projects in ancient times. There is Dujiangyan, which is a natural hydrophobic project, and there are no dams, but its water conveyance system is very good, so they rarely flood. But from this aspect, it can also be seen that their ability to build large-scale water conservancy projects is not strong, because they choose to transport water, rather than blocking it, because the difficulty of blocking water is too high, and there is no large-scale construction machinery at that time, and the stability of the dam built by manpower is definitely much worse than that of modern milletAt that time, there was no steel bar, no cement, no industrial facilities, and the process of building the dam was very slow and not solid.

In ancient times, the construction of infrastructure projects was a very power-consuming and money-consuming thing, and the ancient rulers generally built some major water conservancy projects when they first ascended the throne, because the construction of water conservancy is the most basic condition to ensure the development of agriculture, and then the roads were built graduallyGenerally speaking, the infrastructure will be quite good at the time of listing, but the war will destroy these things.

In ancient times, the development was relatively backward, and now each city has its own dredging pipeline, and the flood will be quickly discharged.

The reason why the Huai River flooded frequently in ancient times was entirely because the flood control technology at that time was not perfect, but now the country is getting stronger, and the level of technical departments in all aspects is also getting stronger, so there is no longer a flood problem.

The Huai River, which was flooded in ancient times, has no such situation now, because the Huai River has been effectively controlled, and the flood disaster has been effectively contained by opening the flood gates.

In ancient times, due to the lack of good flood control technology, the Huai River floods were frequent, and now the construction and protection of many flood control dams have been carried out for the Huai River floods, so the Huai River has no floods!

This sudden flood has affected more than 3 million people in Henan, and the people's lives and property have been in great danger. Most of the floods in Henan will be introduced into the Huai River Basin, because although Henan has the Yellow River Basin, it cannot be introduced due to topography. Only the flood water can be channeled into the Huai River basin. Last year, there was a flood in the Huai He, and the task of flood prevention this time is very severe, and flood prevention and drought control brook no delay.

1. Heavy rainfall has caused Henan to suffer unprecedented dangers, and millions of people are in danger because of the severe weather such as heavy rainfall, causing Zhengzhou and surrounding counties and cities to suffer serious flood damage. People's lives and property were affected, and the rainfall reached more than 500 millimeters in one day, pouring water from 150 West Lakes into Zhengzhou in an hour.

In such a scenario, the lives and safety of the people of Zhengzhou have been seriously threatened. After three days and three nights of torrential rain, Henan has regained its lost land and is rebuilding its homeland. People are vulnerable in bad weather, and because of this outstanding disaster, the world has seen China's strength.

Second, the flood will flow to the Huaihe River Basin, why the Huaihe River Basin is the first choice for the flood in the city, the main underground drainage pipe in the city, after collection, will be introduced into the river through the corresponding road to divert the flood. There are two large river basins in Henan, one is the Huai River basin and the other is the Yellow River basin.

Because the Yellow River basin has relatively few confluence areas in Henan, and the terrain on both sides of the river is very high, there is no way for floods to enter the Yellow River; Therefore, in addition to the Huaihe River basin, a small part of the flood water can enter the tributaries of the Yangtze River.

Third, the lower reaches of the Huaihe River should do a good job of flood prevention measures, and fully cooperate with the discharge of floods, this flood will flow into the Huaihe River basin, and we must do a good job of flood prevention work; in China's history, there have been many floods in the Huaihe River area, and the historical record shows that in 2007, the Huaihe River area was harmed by very serious large-scale floods. By 2018, heavy rainstorms put the Hongze Lake area in danger; In 2020, the flood situation in the Huaihe River basin was fierce, so the discharge process should be very cautious this time.

To carry out flood control, it is necessary to make safe preparations, and all departments must cooperate with each other; Prepare for floods and droughts, and actively carry out preventive measures such as rehearsals; It is necessary to improve the skills of emergency rescue; It is necessary to establish a good sense of responsibility for flood prevention and drought control. At the same time, it is also necessary to speed up the completion of project construction, raise the level of flood prevention, and provide guarantees for the safety of people's lives and property.

Summary

The floods, which put more than three million people in Henan in danger, will flow into the Huai River basin, which is preferred because of the suitable terrain. This introduction will be dangerous to the lower reaches of the Huai River, so it is very important to prevent floods from endangering the safety of the people again. The flood disaster in Henan is very rare, and some engineering construction has a certain defensive function for natural disasters, but this function has a certain standard, beyond the standard, the disaster will occur with a high probability.

Because the Huai River is in the lower reaches of Henan, and the Huai River basin is also a natural flood storage area, it is the Huai River.

Because it is relatively close to Henan, except for the Huai River, which is the Yellow River, and the Yellow River is an above-ground river, it will be very dangerous if it is directly discharged into the Yellow River, so it can only be discharged into the Huai River Basin.

That's because the Yellow River is an above-ground hanging river in Zhengzhou, and the Yellow River's bed is generally 5 to 8 meters above the ground, with a maximum of 10 meters, so most of Henan's floodwaters cannot flow into the Yellow River, but into the Huai River basin, which will inevitably affect the downstream.

Because our international superstar Cami LA (Cami Wax) aka Wax Sister often has water, often uncontrollable drainage, causing the water level of the Huai River to skyrocket, causing immeasurable disasters, resulting in many disasters and difficulties in the Huai River.

In fact, from June to July every year, there will be such weather changes in this season, but the intensity is different every year, and there are many factors that affect the climate and environment, and the most important thing is that it is related to the local natural environment, so the reason why the Huaihe River flood is so serious is that it is interrelated with its own environmental characteristics.

Because the geographical conditions of the Huai River are very special, he belongs to the kind of narrow in the middle, and the two ends are relatively high, it is more rainstorm in the flood season, and the heavy rain will form a flood, so the flood is very serious.

Because of the low-lying nature of the Huai River, coupled with the recent rainfall, too much rain has accumulated, resulting in such a serious flood in the Huai River.

Because the precipitation of the Huai River is particularly large, and the altitude here is comparative, the terrain belongs to the plains and hills, and the water storage here is large, coupled with concentrated precipitation, so it is easy to cause floods.

Natural causes: aClimatic reasons:

a.Precipitation lasts for a long time and is concentrated (e.g., the rainy weather in the Yangtze River Basin);

b.Changes in the intensity of the summer monsoon (subtropical high: drought in the south and flooding in the north; Vice-high and weak: flooding in the south and drought in the north);

c.the impact of typhoons;

d.El Niro.

b.Hydrological water system causes.

e.lack of natural river channels into the sea (Huai River);

g.The river channel bends.

c.Topographical reasons.

h.The terrain is low-lying.

Human causes: aindiscriminate deforestation, resulting in increased soil erosion and riverbed uplift;

b.enclosing lakes to create fields;

c.Unreasonable water conservancy project construction.

The Huai River is narrow and has a low flood discharge capacity.

Precipitation is abundant during the rainy season.

Soil erosion is severe.

The rainy season is concentrated in the summer.

Sediment accumulation, river course twists and turns, and the estuary is small.

Artificially cut and straighten the watershed is reduced.

Expert**: Flooding in the Huai River basin is likely this year.

According to the National Climate Center, this summer, China's precipitation will be greater than the same period in 2009, the main rainy belt may be located in the middle reaches of the Yangtze River along the Yangtze River, along the Huai, Huanghuai and other places, some areas will have floods. Among them, the eastern part of Henan and the northwest of Anhui are located in the upper and middle reaches of the Huai River, and there are more than 2 5 percent, and flood disasters may occur in some areas.

According to the "2010 Huaihe River Flood Season Climate Trend Analysis" provided by the Huaihe River Basin Meteorological Center, since the beginning of this year, the precipitation in the central and southern parts of the Huaihe River Basin has been more than that of the same period in normal years, and the main stream has been more than 20%. The precipitation in the main stream and most of the upper reaches of the Huaihe River basin is about 20 percent more than in previous years, and the whole Huaihe River basin enters the rainy season in June, and there is a greater possibility of flooding in some areas along the Huaihe River.

Qian Min, deputy commander-in-chief of the Huaihe River Defense General and director of the Huaihe River Defense Committee, said that the water potential in the Huaihe River valley was generally stable last year, and there were no large-scale floods, but this year's flood prevention situation may not be optimistic.