"zhangju33": Hello.
. “Rime” is known as one of the four natural wonders of China.
Himfrost, commonly called "hanging tree," is a loose frozen layer in which fog droplets freeze and adhere to the windward side of vegetation and other objects in cold, foggy weather. The reason why frost can be called a strange flower in northern landscapes is that its formation requires a unique environment. The most important factor in the production of frost is that when Fengman Power Station in the upper part of Jilin City produces electricity in winter, when the river water passes through the turbine generator , the river water temperature is affected by the speed of the turbine, causing the river water temperature, which is close to 0 degrees, to rise above zero. About 2-3 degrees. River water at this temperature gushes par the door with a certain amount of thermal energy.
As soon as the temperature reaches minus 20 degrees, a thick fog immediately forms. The mist forms very fine crystals at suitable low temperatures and spreads through the air, starting from Fengman Dam and flowing sixty or seventy kilometers downstream.
Fog enveloped the entire urban area and mountain villages along the river. Frost mainly occurs at night. Sometimes the fog starts at eight or nine in the evening. When fog is thick, visibility is very low and objects cannot be seen within a few meters.
If you shine a light into the air. , you will see very small crystals falling. This indicates that we will see good frost tomorrow.
Depending on the years and normal weather conditions, winter begins in Jilin City when snowfall begins every year in late Novembermbre. From then on, frost also began to appear one after another. Frost will appear more frequently, especially in years with heavy snowfall and colder weather. The water flowing from Fengman Dam creates the wonder of the Songhua River, which remains unfrozen for dozens of kilometers. The fog rises and spreads across the surface of the river. Sometimes,
on particularly thick foggy days, the sun cannot be seen for an entire day. In such weather, the frost clinging to the trees will not fall and another layer will cling to them at night. The next day the frost on the trees was as thick as sorghum. Seeing such good frosting will definitely make you smile.
Best wishes and goodbye.
The Fengman Dam is a concrete gravity dam with a length of 1,080 meters and a height of 91.7 meters. The upstream slope is 1:0.048 and the downstream slope is 1 : 0.75. The longitudinal joints divide the dam body into four blocks and the columnar blocks are cast. The concrete volume of the dam body is 1.94 million cubic meters. The dam consists of 60 dam sections, each dam section is 18 m long. Dam sections No. 1 to No. 8, No. 20 and No. 32 to No. 60 from the left bank are the check dam sections, and No. 9. The sections of dam No. 19 are the sections of the overflow dam. The flow dam section is an orifice type spillway. The elevation of the spillway is 252.5 meters. There are 11 holes, each measuring 12 meters wide and 6 meters high. the volume is 9,020 cubic meters per second and the maximum verified discharge volume is 9,240 cubic meters/s, using a differential water jump threshold to dissipate energy. Dam section No. 21 to No. 31 is the section of the dam for power generation and water intake. The buildingent of the power plant is located on the right, measures 189 meters long, 22 meters wide and 38 meters high.