Hazard: wind can make people catch a cold; Tornadoes will involve people; The wind displaced us.
I hope I can help you!
(the benefits of the wind:
Moderate wind speed plays an important role in improving farmland environmental conditions. Surface heat exchange, farmland evapotranspiration and carbon dioxide in the air,
The oxygen transport process is accelerated or strengthened with the increase of wind speed. Wind can spread plant pollen and seeds and help plants pollinate and reproduce. Monsoon prevails in China, which is beneficial to the growth of crops.
Hazards of strong winds, sandstorms and tornadoes;
The first is the harm to agriculture. The damage to crops includes mechanical damage and physiological damage. Mechanical damage refers to poor pollination, lodging, root cutting and grain dropping of branches, leaves, flowers and fruits of crops. Physiological injury mainly refers to the imbalance of crop water metabolism, the increase of transpiration and the wilting of plants due to water loss. The degree of damage varies with the magnitude and duration of wind, plant height, plant type, density, row direction and crop growth period. Wind energy spreads pathogens and spreads plant diseases. High-altitude wind is a meteorological condition for the long-distance migration of pests such as armyworm, rice planthopper, rice leaf roller and locust. Strong wind causes mechanical wear of leaves, lodging of crops, broken trees, falling flowers and fruits, which affects the yield. Strong winds can also lead to soil erosion and sand dune movement, and destroy farmland. Blindly reclaiming wasteland in arid areas, wind will lead to land desertification. Strong winds and snowstorms in pastoral areas will disperse herds and aggravate freezing damage. Local winds, such as tidal winds with high salinity, hot winds with high temperature and low humidity and dry-hot winds, have seriously affected the flowering and fruiting of fruit trees and the filling of cereal crops. The strong wind in early spring in the north often causes wind damage to trees, and there is a phenomenon of partial crown and eccentricity. Part of the crown will bring difficulties to tree pruning and affect the function of trees. Eccentric trees are prone to freezing injury and sunburn, which affects the normal development of trees.
The second is the harm to animal husbandry. Including livestock and animal husbandry. When the herd on the grassland encounters windy weather, it will affect the normal feeding. Strong winds for several days will reduce the overall physique of the herd and its ability to resist epidemics. In winter and spring, the monsoon is strong, and young and weak livestock often squeeze into a pile because of heat dissipation, and sometimes die because of extrusion. The physiological damage of wind damage to forage grass is the same as that of wind damage to crops. Strong wind will cause forage grass to lose water and dry up, and the yield and quality will decrease.
The third is the harm to people's lives and property and other industries. Strong winds, sandstorms and tornadoes often cause direct or indirect casualties. Strong winds often blow down unstable buildings, cranes, billboards, telephone poles, financial offices, etc. , resulting in property losses and communication, power supply interruption.
Fourthly, wind damage sometimes aggravates the harm of other natural disasters (drought, thunderstorm, hail, salinization, desertification, etc.). ). For example, strong winds can denude soil, accelerate soil desertification, activate semi-fixed sand dunes and move sand dunes, and accelerate the desertification process. )