Will severe drought lead to other natural disasters?

The direct harm of drought is that the output of agriculture and animal husbandry has been reduced, drinking water for people and livestock has become difficult, and the peasants and herdsmen have fallen into poverty. The indirect hazard of drought is the occurrence of other natural disasters.

1) Drought is the first disaster that endangers agricultural and animal husbandry production.

Meteorological conditions affect the distribution, growth and development, yield and quality of crops, and water conditions are the main conditions that determine the type of agricultural development. Due to its high frequency, long duration, wide range of impact and large delayed impact, drought has become the most serious meteorological disaster affecting China's agricultural production. Drought is the main animal husbandry meteorological disaster in China, which is mainly manifested in affecting pasture and livestock products and aggravating grassland degradation and desertification.

2) Drought has led to further deterioration of the ecological environment.

1.The warming and drying of the climate has caused the water level of lakes and rivers to drop, and some of them have dried up and cut off. Due to the lack of surface water supply caused by drought and water shortage, we can only rely on a large amount of over-extracted groundwater to maintain the livelihood of residents and the development of industry and agriculture, but over-exploitation of groundwater has led to a series of ecological and environmental problems such as groundwater level decline, funnel area expansion, land subsidence, and seawater intrusion.

2.Drought leads to the degradation of grassland vegetation. Most areas of China are in arid, semi-arid and sub-humid ecologically fragile zones, and the climate is characterized by the prevailing southeast monsoon in summer, the same season of rain and heat, and the precipitation mainly occurs from April to September every year.

Although the rainy season in the northern region is also from April to September every year, there is great spatial heterogeneity, which is characterized by nine droughts in ten years. Due to the change of climate and environment and unreasonable human disturbance activities, the vegetation has been seriously degraded, and after entering the 21st century, drought has a tendency to worsen for several consecutive years, and it is a continuous drought in spring, summer and autumn, which is very unfavorable to the fragile ecosystem.

3.Climatic aridity exacerbates the process of land desertification.

3) Other natural disasters occur due to a warming and drying climate.

Droughts in winter and spring are prone to forest fires and grassland fires. Since 2000, due to the continuous increase of global temperature, the climate in the northern region has been dry, the ground temperature of woodland is high, the grassland has a long dead period, and the underground forest fire and grassland fire have an increasing trend.

The weather is dry, beware of the candles.

The intensity and scope of environmental destruction have been increased, resulting in the exploitation of the entire global resource, so the large-scale environmental destruction activities of human beings have led to the imbalance of the entire natural ecosystem, and some areas have even become permanent deserts.

The second aspect: the global warming effect is serious. After human beings entered industrialization, more and more commodities were produced to enrich people's lives, but because industrial production activities were too frequent.

As natural disasters are becoming more and more severe due to global warming, the following methods can be used to reduce natural disasters.

A rapid attribution analysis of global climate change conducted by a panel of top international climatologists shows that global warming is a major factor in the frequency of extreme weather events, WMO said.

If we compare the Earth to a heat-generating furnace, greenhouse gases in the atmosphere, such as carbon dioxide, absorb heat from land and sea, thus disrupting the Earth's thermal cycle and ultimately leading to an increase in global temperatures.

Zhu Dingzhen, chief meteorological service expert at the Public Meteorological Service Center of the China Meteorological Administration, said that although the earth has experienced many significant warming and cooling in the past four billion years, scientists are most concerned about the overdevelopment of human beings and will bring disaster to life on earth.

In particular, severe heat waves can lead to crop failures, personnel**, and widespread power outages due to increased use of air conditioning.

1. Prevention first, always be prepared.

Strengthen education on the prevention of natural disasters and accidents, and enhance the people's awareness of prevention. Strengthen daily inspections, discover potential dangers in a timely manner, and take effective prevention and control measures in a timely manner to minimize losses caused by disasters.

Conduct regular self-inspections of construction sites, fences, ditches, power lines, trees and other buildings to detect problems early and eliminate them in time.

2. Manage according to law and lead in a unified manner.

Strictly abide by relevant national laws and regulations, handle emergency prevention, reporting and control and medical assistance in accordance with the law, and hold accountable those who violate regulations. The Leading Group for Emergency Handling of Natural Disasters is responsible for prevention, command, coordination and handling.

3. Quick response and efficient operation.

Establish a rapid early warning and response mechanism, strengthen the reserve of human, material and financial resources, strengthen the emergency response to emergencies, and respond quickly in the event of a natural disaster, and do a good job of disposal in a timely and efficient manner.

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.

The causes of drought disasters in various parts of China can be roughly summarized into three aspects:

One is the precipitation factor, generally speaking, precipitation below average is prone to drought. In China's sarcastic climate zone, the seasonal change of precipitation in different regions forms the basis for the distribution of seasonal drought-prone areas in China. In the area south of the Yangtze River, due to the early and late arrival of the summer monsoon, the rainy season is early and long, and if the monthly rainfall is small, it is easy to produce drought.

The rainy season in North China and Northeast China is from June to September, and the spring drought and spring and summer drought are particularly serious. Southwest China mainly relies on the precipitation brought by the southwest monsoon, and the dry season is from November to April of the following year.

The second factor is water resources. There is more water and less arable land in the south of our country, and less water and more arable land in the north. This imbalance of water resources between regions is an important factor causing drought disasters in China.

The third is the socio-economic factor, which mainly refers to the increase in water use for China's industrial and agricultural production in recent decades. First, the increase of cultivated land multiple cropping index (the percentage of crop sowing area and cultivated land area in a year in an agricultural production area) and the expansion of irrigated area have led to an increase in farmland water demand. Second, the sown area of winter wheat in northern China has increased, and the area of farmland threatened by spring drought in northern China has been further expanded. Third, the increase in China's population has led to an increase in the amount of domestic water consumed, and the development of industry has led to an increase in industrial water consumption and water demand.