Whether people are related to natural disasters such as floods

Not all natural disasters are, such as the collision of tectonic plates, and floods have multiple causes

1) Massive tree felling by humans, resulting in a sharp decline in forests, and massive human emissions of CO2, which led to an increase in CO2 levels, melting glaciers in the Arctic and Antarctic, and rising water levels.

2) Some rivers have a flood season, there may be floods before there are no hydropower stations, in the tropics, due to the equatorial approach, controlled by the equatorial low pressure, the equatorial region has a lot of precipitation, the east coast of the continent due to the difference in the thermal properties of the sea and land leads to a typical monsoon climate, and there is the seasonal movement of the pressure belt wind belt, etc.

Therefore, some are related to people, some are not related to people, some are produced by the internal forces of the earth, and some are man-made, so we must protect nature and take the road of sustainable development.

There must be an impact, but natural disasters have existed before the advent of human beings, and now human sabotage has increased the chances of such disasters.

Felling down trees has led to a significant increase in the sediment content of rivers, silting up the river channels, and causing poor drainage and flooding.

Destruction of mountains, prone to landslides and mudslides.

CO2 is increasing, the climate is warming, polar ice is melting, and sea levels are rising, inundating coastal lowland islands.

Destroying the ecology and increasing the number of extreme weather, frequent heavy rain, heavy snow, hail, strong winds and other disastrous weather.

Of course, carbon dioxide is due to the high concentration of carbon dioxide in the air due to the massive burning of oil and coal.

Natural disasters refer to natural phenomena that endanger or damage the human living environment, including drought, high temperature, low temperature, cold wave, flood, flash flood, typhoon, tornado, flame tornado, hail, hail, frost, heavy rain, blizzard, freezing rain, fog, wind, ice, haze, haze, tsunami, landslide, debris flow, floating dust, blowing sand, sandstorm, thunderstorm, ball lightning, volcanic eruption, etc.

The Indian Ocean tsunami of December 2004 affected 14 countries and killed about 10,000 people, making it the deadliest tsunami. In 2011, the East Japan Great** may become the worst natural disaster in the past 10 years.

1. Crop yields were reduced by disasters. Major floods have caused a large amount of farmland to be washed away and submerged, crop yields have been reduced or even lost, and the agricultural product processing industry and light industry have lacked raw materials or the cost of raw materials has increased, resulting in factory production reduction and shutdown, followed by unemployment of workers.

2. The interruption of transportation and communication makes the information and transportation blocked or delayed, resulting in a large number of product backlogs and deterioration, insufficient raw materials, and a decline in production capacity. In particular, the blockage of emergency relief supplies is likely to amplify existing disasters.

3. Major flood disasters have caused a decline in the living standards of the people in the disaster areas, and there is a lack of basic livelihood guarantees, resulting in a large number of victims, disrupting the normal social order and impacting all aspects of society.

4. Cause great damage to the environment on which human beings depend. For example, floods will cause soil erosion every year, a large amount of soil and its nutrients are lost, resulting in poor land, and at the same time, the sediment content in the water flow increases, resulting in the attenuation of river function, the shrinkage of lakes, and the desertification of cultivated land, and the serious consequences are incalculable.

5. The pollution of the water environment by flooding mainly includes the spread and spread of toxic and harmful substances such as germs, parasites, industrial waste residues, waste liquids, chemical fertilizers, pesticides, etc., which will seriously endanger people's lives and health. In addition, flooding will have a significant impact on shipping, transportation, tourism, aquaculture, etc.

Flooding is heavily related to the monsoon climate.

Precipitation is concentrated in the summer.

During the flood season, the river water rises sharply, causing the river to drain poorly.

The vegetation in the basin area is destroyed, the soil erosion is serious, and the sediment content is large. The middle and lower reaches are generally plain areas, with slow flow rates and easy to form floods.

The strength and retreat of the summer monsoon are different.

The direct cause of flood disasters in China is the strength of monsoon activity.

In years with strong summer monsoons, short stay in the south, little precipitation, and arid; The advance to the north is early, the stay time is long, and a large amount of precipitation is formed, often forming floods.

Flood disasters include flood disasters and rain and flood disasters, among which, due to heavy rainfall, ice and snow melting, ice cubes, dam bursts, storm surges and other reasons caused by the increase of water volume in rivers, lakes and coastal water, flooding and flash floods are called 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.