The reservoir area belongs to the subtropical humid monsoon climate zone, with abundant cold winter and hot summer rainfall and an annual average temperature of 18e. March to July is the main precipitation period in the reservoir area in the year, accounting for more than half of the annual precipitation. The slopes of mountains are steep, the terrain is complex, and the weather is changeable. The spatial and temporal distribution of rainfall varies greatly. July-September is a good season for thunderstorms and strong winds. During this period, thunder and lightning strikes and strong winds (associated with the trend of the mountains) are extremely short-lived and endangering. They can not only destroy buildings but also threaten personal safety. On the night of August 17th, 1999, a strong wind lasted for about 20 minutes. It was from Wangjiaqiao and Maying in the direction of the river channel of the valley, and it was scraped toward this station (the Experimental Station of the Three Gorges Project of the Chinese Academy of Sciences). The amount of rainfall is small, and the rainfall lasts for about 1 hour. The aluminum alloy doors and windows of this station fell out of shape, two pieces of glass shattered, and the satellite antenna frame was seriously deformed. The canopy in front of the kitchen and dining room was blown up by the wind to completely uproot the wooden frame and put it to the house. After a few meters away. The wind speed and direction recorder can measure and analyze the relevant parameters of the wind and provide a basis for the development of agriculture. Scan the QR code below to watch the Top WeChat official WeChat (also WeChat search: top instrument), agricultural equipment information in real time view:
This machine is a Automatic Solder Paste Mixing Equipment.Size:390 x 390 x385
1.Professional SMT Digital has Strong mixing ability,satisfy ISO-9000 cream mixing conditions.
2. Attached red rubber fixture,can be used as red rubber claves.
3.Micro-computer digital control,easy operation.
4. SMT Solder Paste Mixing machine has strong adaptability,with all-purpose fixture,suitable for various brands of cream.
5. Multiple security protection,ensure the safe operation.
6. Operated speed:480RPM
7. Work ability: 100-1000g, put two bottles at the same time.
8.Mixing time:0.1-9.9minutes.
Stirring a variety of solder pastes such as ISO-9000, can be used as a red glue decreate.
Any details about Solder Paste Mixing machine you want to know please contact us for further more.
SMT Solder Mixer,Solder Paste Mixing Equipment,Solder Paste Mixing Machine,Solder Pasting Mixer,strong mixing ability SINGSUN ELECTRONIC SCIENCE & TECH CO.,LTD , https://www.singsunautomatics.com
The precipitation from July to November has a direct impact on the growth and development of soybeans, summer corn, peanuts, navel oranges, and other crops. It is also a regular occurrence of drought, which determines the harvest of economic fruit trees. The strong precipitation and strong winds in the reservoir area not only caused heavy resistance to agricultural production, but also made it more difficult for the construction, resettlement and production of the Three Gorges reservoir area in the Yangtze River. According to the circulation and impact system of the precipitation process in the Three Gorges area from 1961 to October 1994 to January 1994, the water vapor required for precipitation in the Three Gorges area during the dry season was mainly from the Bay of Bengal, followed by the South China Sea. The systemic uplift required for heavy rainfall is mainly low vortex, cold peak, shear line and short wave trough. These conditions may occur simultaneously in the Three Gorges area under certain circulation conditions, resulting in heavy precipitation in the area.
Water evaporation and transpiration of plants on steep slopes of mountains. As the temperature of morning sunlight increases, when the temperature rise of a certain slope is greater than the temperature of the surrounding air, the hot air obtains rising buoyancy, and the surrounding air is replenished. As one ascends, there is a vertical climbing fog movement and a misty mountain climbing exercise, which is quite spectacular. The water vapor content in the fog has obvious spatial and temporal changes, generally more in summer than in winter, and the end time of the mountain climbing is related to altitude and wind direction. In the course of changes in atmospheric temperature, the mist rises to the top of the mountain, often forming a cloud-wound and up-and-down phenomenon. This is a natural phenomenon on the top of a mountain plate, or it rises to the top of the mountain and flows out. When the night temperature falls below the dew point and the water vapor content in the air saturates, there will be condensation of water vapor on grass, trees, and ground on the slopes of mountains. In the summer, the weather is dew, and the winter is frost. The precipitation formed by the night dew and frost is quite abundant.
Some locals often judge the weather conditions of the day according to the state of cloud and fog on the top of the mountain and the wind speed and wind speed, and they have certain experience and rules. However, in the mountainous area, the change of the wind direction is erratic. Even in a very short period of time, the wind direction can reach 360 degrees, that is, the surrounding mountain wind rotates. This is also an important reason why the local people judge the cloud and fog change is inaccurate. What is even more serious is that a short storm (within tens of minutes) of extraordinary storms has caused windstorms, and it is very directional and extremely narrow in scope. It is fierce, and it is retreating fast. This particular storm appeared, often during periods of drought, long drought and hope of rain. At this time, the rain was not big, and it swept over and swept away.
The analysis of wind and wind direction recorders found that in the winter and spring season, the content of water vapor in the atmosphere is not as good as summer, but it plays another role. It can condense or congeal into water droplets or ice crystals to form rain, fall snow, and form a mountaintop in close proximity. The snow-capped mountains are rainy and cloudy, contrasting and becoming an important source of water flow in mountain streams. In addition, bacteria, micro-organisms, and plant spore powder are suspended in the atmosphere of mountainous areas, fine particles and cosmic dust generated by the meteor, sand and dust particles, and large quantities of wheat straw, corn stalks, and rape stalks, etc., are generated. The carbon dioxide and nitrogen oxides are the consequences of human factors. As a result, the content of greenhouse gases in mountainous areas is increasing day by day. Although it is not enough to destroy the environment, the increase of greenhouse gases and suspended solids in the air has an effect on the condensation of water vapor and the formation of clouds and fog. The important role is to make the surface and air temperature and visibility have a certain negative impact. 