The upper reaches of the Yangtze River will flood again, because of how much rain it has?

The upper reaches of the Yangtze River will flood again, because of how much rain it has?

Nowadays, the amount of precipitation in each place is very large, and the precipitation in some areas is clustered together, and even floods have formed, so the current precipitation is still continuous, and flood disasters have already formed in some areas.

And some of the rivers are already full. In particular, there is a lot of water in some rivers in the lower reaches of the Yangtze River. The upper reaches of the Yangtze River are subject to frequent flooding.

Seeing this, you may have questions, what is the cause? Some rivers in the upper reaches of the Yangtze River often flood?

Actually, I think this problem is very easy, because now we all know that the precipitation is very large, and the precipitation in the upper reaches of the Yangtze River is relatively concentrated, in this case, some precipitation will gradually collect into the river, and after entering the river, they will flow towards the main river. The last river to flow into the main river is the Yangtze River. Therefore, it is precisely because of this that the water volume of the Yangtze River has increased rapidly, and there have been floods in some areas.

I think these are some very normal phenomena, because the current precipitation is mainly concentrated in some southern areas, and some northern areas have also been greatly affected, if this precipitation continues, it is estimated that the rivers in some areas will be full, and after the rivers are full, they will gradually pour into the main rivers, so that the precipitation and water flow of the Yellow River and the Yangtze River will be very large.

This is also the reason why there are floods in some areas, if there are some dams that can control the amount of water, the cause of flooding is smaller, if not, the probability of flooding is greater. In short, these situations are very complicated, and there are some areas where the precipitation is moderate, so there will not be such a large amount of precipitation.

However, there may be less precipitation in some areas, so in this case, the probability of precipitation will be greater. In addition, in order to be able to form this appropriate amount of precipitation, some areas will gradually discharge floodwater, and sometimes the areas of flood discharge are some areas with relatively flat terrain, especially areas with no cash crops and no crops, and these areas can delay this situation to a certain extent.

Therefore, this problem is a problem that everyone needs to pay attention to, and in many cases, as long as we can pay attention to this problem, it will form a better service impact, especially for residents in some mountainous areas, we must guard against the impact of flash floods and mudslides, pay attention to the weather forecast in time, and transfer in time once we encounter abnormal phenomena, so as not to bring losses to everyone.

It's because of too much rain. Heavy rains on the Minjiang, Tuojiang and Jialing rivers, tributaries of the upper reaches of the Yangtze River, caused a surge in water volume.

If there is another flood, too much rain should be the main cause, I live in Chengdu, and this time Chengdu was also affected by the flood, so if there is another flood, the city's flood drainage capacity will not be as good as before.

Of course, flooding is usually caused by too much rain, and very little by flooding caused by the destruction of waterways.

It's really because of too much rain, because the rainfall is still very heavy these days, and there are typhoons.

I think that too much rain is the main reason why the upper reaches of the Yangtze River may flood again, because there is too much precipitation this year, so the upper reaches of the Yangtze River are prone to flooding.

The main problem is that the hardened road and the hard ground do not increase at a sustained rate, and the comprehensive fine absorption channel is combined together, and if it cannot be fully absorbed, it will be blocked, because the general ground hardening will be heavier due to the continuous expansion. Slow throat to smaller?

Heavy rain, small rain, no rain and drought!

1. There are many plains in the middle and lower reaches, and the terrain is low and flat, which is not conducive to flooding.

2. It belongs to the monsoon climate, with a lot of precipitation and concentration, and a lot of heavy rain in summer.

3. The balance between the north and the south is more divergent.

4. The vegetation in the upper reaches of the ridge is seriously damaged, resulting in soil erosion, the downstream riverbed is raised, and the mud and cherry trees are slapped and the sand is silted, forming an above-ground river.

5. People have enclosed the lake to create farmland, which has reduced the area of the lake and weakened the lake's ability to regulate and store floodwaters.

Reasons: 1. There are many plains in the middle and lower reaches, and the terrain is low and flat, which is not conducive to flooding.

2. It belongs to the monsoon climate, with a lot of precipitation and concentration, and a lot of heavy rain in summer.

3. The north and south tributaries flow into more.

4. The upstream area has serious damage to vegetation, resulting in soil erosion, and the downstream riverbed is raised, and sediment is silted up, forming an above-ground river (the Jingjiang River section is particularly prominent, known as the "Jiuqu Ileum").

5. People surrounded the lake to create farmland, which reduced the area of the lake, and weakened the lake's ability to regulate and store floodwaters.

Measures: 1. Strengthen soil and water conservation work in the upper reaches and plant more trees.

2. The middle reaches of the river section are "cut off and straightened", and the river channel is dredged.

3. Construction of water conservancy projects downstream (reinforcement of flood control embankments and construction of reservoirs).

4. Improve people's awareness of flood prevention and self-rescue ability.

1. Natural causes: The flood of the Yangtze River is mainly due to the large amount of flood in the upstream main stream and the middle reaches of the tributaries, the lack of sufficient flood control and detention places in the middle reaches, and the lack of cathartic capacity of the river. Most of the areas through which the Yangtze River flows are humid areas, with a wide basin area, many tributaries, long flood seasons and large amounts of water in the main stream, and floods are formed by heavy rainfall.

In some years, (mainly related to the strength of the monsoon) heavy rainfall in the basin, the north and south tributaries come at the same time, especially the flood in the upper reaches of the Sichuan River, and multiple floods are encountered at the same time, and the main stream of the Yangtze River will inevitably have a major flood.

2. Human causes: due to excessive logging, steep slope reclamation, a large reduction of surface vegetation, and aggravation of soil erosion, the ability of the river basin to regulate runoff, peak shaving and replenishment of dryness is reduced, and a large amount of sediment flows into the river, resulting in too high the riverbed and reduced the cathartic capacity of the river. In addition, the enclosure of the lake and the cultivation of farmland have caused the lake to shrink, and the ability to regulate and store flood peaks has been greatly weakened.

According to historical records, from 185 BC (the beginning of the Western Han Dynasty) to 1911 (the end of the Qing Dynasty) in 2096, the Yangtze River suffered a total of 214 major floods. In the 450 years from 1499 to 1949, the Jianghan dry embankment in Hubei Province burst 186 times. Several major floods in the Yangtze River in history are as follows:

In 1788, there were major floods and floods in the upper, middle and lower reaches of the Yangtze River. On July 23, the peak flow of Yichang was 86,000 cubic meters per second. The Jingjiang embankment broke in more than 20 places, and the flood rushed into Jingzhou City, the water depth was five or six meters, and the water receded two months later.

In 1860, the peak flood flow in Yichang was about 92,500 cubic meters per second, and the peak flood flow in Zhicheng reached 110,000 cubic meters per second. The year's floods lasted from mid-June to late July, with a late flood in November, rarely seen in a typical year.

In 1870, the flood mainly came from the Jialing River basin, the peak flow of the Beibei flood reached 57,300 cubic meters per second, and the flood affected the area from the Sichuan Basin to the plain lake area in the middle reaches of the Yangtze River, about 30,000 square kilometers of the area were flooded, and more than 30 prefectures and counties in Hubei and more than 20 prefectures and counties in Hunan were seriously affected.

Flood disasters. This flood was the largest since 1153.

From July to August 1931, a basin-wide flood occurred. The Yangtze River basin has been affected by disasters covering an area of 150,000 square kilometers, flooding more than 50 million mu of farmland in the middle and lower reaches, killing 145,000 people and killing more than 28 million people. The highest flood water level in Wuhan Pass reached 20 20 meters, and most of the water in Wuhan urban area was several feet to more than zhang deep, and the flood water soaked for 3 months.

1.Natural causes.

1) Influence of the southwest monsoon and southeast monsoon. The Yangtze River flows through humid areas, with wide basins and many tributaries, and is affected by the double monsoon, with a lot of precipitation and concentration, in May, the rain belt is located on the south bank of the Yangtze River, and in June it is located on the main stream and the north bank. In summer, there are many heavy rains, and the main and tributaries have a long flood season and a large amount of water.

In abnormal years, the rain belt hovered on the north and south banks of the Yangtze River, causing floods on the south bank, the Sichuan River, and the Han River at the same time, and the main stream experienced a major flood.

2) The junction of the stairs is mountainous and windwardly. It is located on the windward slope and has many terrain and rain. The basin is mountainous, with large drops and rapid currents.

3) The middle and lower reaches are low-lying and flat, and the drainage is not smooth. The middle reaches of the area are low-lying and flat, with slow water flow, sediment accumulation and poor drainage. There are not enough places for flood control and flood detention, and the water discharge of the Jingjiang River during the flood season is not smooth, and the water level is raised, which aggravates the flood disaster of the Yangtze River.

The low terrain in the middle and lower reaches of the plain and the poor drainage of rivers in the rainy season are the root causes of waterlogging.

4) The eastern part of the sea. It is bordered by the northwest Pacific Ocean and is greatly affected by typhoons and summer monsoons, with many disasters such as strong winds, heavy rains and storm surges.

2 Human causes.

1) Deforestation, soil erosion.

2) Sediment accumulation, enclosing lakes and making fields, and poor flood storage capacity of rivers and lakes.

3) The economic heart of our country. The Yangtze River Basin is an area with concentrated agriculture, developed industry and commerce in China, with dense population, construction, transportation roads, rapid economic development, and increased asset density, which aggravates the vulnerability of the affected body and increases the severity of the disaster.

There are natural disasters and man-made disasters, three points of natural disasters and seven points of man-made disasters!

Aaaaaa I'm here to ask questions!! It's swollen here.