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Persistent heavy rains led to flooding in the south. So what are the other causes of flooding other than heavy rains?
In addition to heavy rains, storms can also cause flooding. When swept by a storm, the waves roll and surge, and the sea water in the coastal area will become flooded, resulting in storm waves, and the residents living in the coastal area will be submerged by the sea.
Reducing the size of lakes can also cause flooding. Nature is an amazing and interconnected ecosystem. Without vegetation, soil and water will elocate; Without marine animals, there would be no life in the sea; If the area of the lake decreases, the regulating function of the river will decline, which will easily lead to the hoarding of the river and the sea, and the river and sea level will be the first, which will easily cause flooding.
In addition, natural disasters such as tsunamis and ** can also cause flooding. **When the degree is large, it will cause landslides, ground cracks, land ruptures, landslides, etc., resulting in river blockage and flooding. It also causes the floor to vibrate, and the ensuing storms and rain cause sea levels to rise.
The most important reason is the human factor. We all know that soil and vegetation have the function of storing water, once there is no soil and vegetation, nature will not be able to store water normally, then, when it rains heavily, it is easy to cause flooding.
If vegetation is cut down, the land loses a layer of protection, and heavy rains wash away a lot of sand and gravel, which can only flow into the river with the current, causing siltation and flooding. <>
In addition, there is another type of human-caused flooding, that is, unscientific farming methods and overgrazing. Arbitrarily cultivating land for cultivation and grazing can lead to the destruction of vegetation, the loss of protective layers of the land, the acceleration of soil erosion on slopes, and flooding.
All of the above factors contribute to flooding. It is human beings who are most injured by floods, and we cannot avoid natural factors, but human factors are controllable. Everyone should have the awareness of "protecting resources and the environment", in addition, our country should continue to uphold the idea of "strengthening the country and strengthening science and technology".
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Flooding can occur due to the risk of emergency flow from the melting of snow and ice in large rivers, as well as high rainwater levels and super typhoons that occur over a long period of time, so it is important to be careful to ensure that various drainage facilities are in place.
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I think that in addition to flooding caused by heavy rainfall, typhoons can cause tsunamis and cause flooding. Typhoons are a serious natural disaster that can cause tsunamis and flooding
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People in coastal areas know that typhoons and tsunamis can also cause severe flooding. In addition to this, melting glacier water can also cause flooding. There are also human factors, such as soil erosion due to the destruction of forest vegetation.
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People have reclaimed land and seized land, which has reduced the drainage function of rivers and lakes, and the increase in climate and population will also cause floods.
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1.The global climate is warming, and the temperature is rising rapidly.
2.Rising sea levels lead to an increase in the area of water.
3.Anthropogenic causes: paralysis of the drainage system, rising temperatures due to human actions, melting of ice water.
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Originally, it may have been due to the release of water from upstream reservoirs, the destruction of dams by termites, major floods caused by collapses, river diversions, geological changes, etc., but now these accidents are generally not so prone to occur.
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In addition to heavy rainfall, the following may cause flooding:1Soil erosion.
Soil erosion can lead to sediment accumulation, which in turn can raise the riverbed, causing the river to not be able to carry the high amount of precipitation when the rainy season comes, which in turn can cause the dam to be washed away and cause flooding. 2.The river channel was encroached upon.
The river narrows, and when the rainy season comes, the flood rate decreases and the water level rises rapidly, which in turn leads to levee bursts and flooding.
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The Yellow River backflows, the Yellow River is destroyed, a large amount of rainwater backs in, and the sewers are blocked, resulting in water that cannot be discharged, which will also cause floods.
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In addition to heavy rainfall, flooding can also occur when dams burst and global water levels rise. A lot of long-term disrepair will lead to loose structures, coupled with the pressure of water can form a disaster in an instant, which requires us to check it in ordinary times to prevent microscopic problems. On the other hand, the greenhouse effect causes global temperatures to rise, glaciers to melt, and water levels to rise.
This is a very big threat to coastal residents.
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There are also many causes of flooding, such as a burst of a levee that can cause flooding, and landslides that can also cause flooding. These disasters are relatively serious, and the relevant departments should do a good job in geological surveys and early warning measures.
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1. Heavy rainstorms do not stop for a long time, and the water level of the river is rapid**; 2. The river is blocked, and the water is not easy to flow smoothly; 3. The dam is in disrepair all year round and is not strong; 4. Artificially caused embankment breaching; 5、**。
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1. Flood disaster.
Disasters caused by heavy rainfall, melting of ice and snow, ice cubes, dam bursts, storm surges, etc., caused by the increase in the volume of water, flooding of rivers, lakes and coastal areas, and flash floods are called flood disasters.
2. Rain and flood disasters.
Disasters caused by heavy rain, heavy rainfall or long-term rainfall that produce a large amount of stagnant water and runoff, and the drainage is not timely, resulting in waterlogging and flooding of land and houses is called rain and flood disasters.
3. Debris flow.
Mudslides are special torrents that carry a large amount of sediment and rocks due to landslides caused by heavy rains, heavy snowfall or other natural disasters in mountainous areas or other ravines and areas with steep terrain.
4. Soil erosion.
Due to the influence of natural or man-made factors, rainwater cannot be absorbed on the spot, and it flows downwards and washes the soil, resulting in the simultaneous loss of water and soil. The main reasons are large ground slope, improper land use, destruction of ground vegetation, unreasonable farming techniques, loose soil, indiscriminate deforestation, overgrazing, etc.
5. Endangering the national economy and people's lives and property.
Torrential rains or heavy rainstorms or extremely heavy rains in a certain area often lead to the outbreak of flash floods, the collapse of reservoirs, the overflow of rivers, the collapse of houses, the inundation of farmland, and the interruption of transportation and telecommunications, which will bring serious harm to the national economy and people's lives and property.
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1. Lead to personnel**.
Death or injury caused by direct inundation of floods or collapse of buildings impacted by floods, and osmium death or death of disease caused by famine or disease. This is the most direct hazard of flood disasters to people. 2. Cause outbreaks and epidemics of diseases.
Due to flooding or flooding, livestock floods need to be moved in large quantities. On the one hand, the transfer of infectious agents to non-endemic areas, and on the other hand, the entry of susceptible populations into endemic areas, the migration of such populations has potential epidemic factors. Such as influenza, measles, and malaria can cause epidemics with this movement.
Some of the most common diseases, such as red eyes and ** disease, can also increase the chance of transmission due to dense crowds and contact. When evacuating from a flood disaster, pay attention to turning off the gas valve and the main power switch. Household gas valves, power switches, etc. are susceptible to external forces in flood disasters, and leakage occurs, which are easy to cause accidents such as gas ** and electricity leakage, and should be closed in time when evacuating.
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Floods can cause a lot of inconvenience to people, all crops are damaged, and houses collapse and mudslides occur.
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Floods will bring great harm, will make the people's property losses very serious, if once a flood occurs in a certain place, it will be terrible, serious will wash away the houses, that is, all the property is lost, and even the personnel have **.
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Floods can cause people, and floods are the most direct hazards to people caused by floods due to direct flooding or collapse due to flooding buildings.
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Lao Huang carried two baskets of vegetables, walked four or five miles, and rushed to the market to sell. Two baskets of vegetables cost 150 pounds, Lao Huang picked it on his shoulders, tired but happy, humming a small tune along the way. When he arrived at the market, the vegetables were sold for nearly 200 yuan, and Lao Huang used the money to buy a bag of fertilizer, cut some meat, buy two bags of salt, and other bits and pieces.
The fertilizer weighs 50 pounds and is placed in a basket, just right. However, the problem is that the miscellaneous things on the other end weigh no more than ten pounds together. The weight of the two baskets is different, and when you pick it up, the light end is raised high.
Lao Huang could only move the flat burden on his shoulder as far back as possible, and at the same time, put his hand on the front of the flat burden, trying to press down. But still no. The difference in weight between the two baskets is too great and unbalanced to pick up at all.
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1. Plateaus and mountains are the most likely to induce secondary disasters such as landslides and debris flows.
2. If the basin and the mountainous plains encounter high-intensity and large-scale rainstorms, especially continuous heavy rains, they are prone to serious disasters such as flooding and submerging cities.
3. Due to its flat terrain and vast area, the plain area is dominated by flood-type waterlogging.
4. In low-lying and closed areas, the accumulation of water in farmland and the oversaturation of soil moisture will bring disasters to agriculture.
5. It even causes flash floods, river flooding, and dam bursts, causing major economic losses to the people and the country.
Factors that trigger heavy rainfall
The occurrence of heavy rain is mainly affected by atmospheric circulation, weather and climate systems, and is a natural phenomenon. The occurrence of heavy rain disasters is not only due to its natural causes, but also to the influence of its social and human factors.
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