Why is there such a natural landscape in Xinjiang? First, geographical location. Xinjiang is located in the northwest inland, with an altitude of-155m (Ear Nail Lake in Turpan) ~ 86 1 1m (Jogory Peak). Second, the terrain. ? Three mountains and two pots? Special landforms, mainly mountains and deserts, have a large temperature difference between day and night.
The reason why such a landscape is formed is not only the terrain, but also the change of temperature. When the temperature continues to drop and the water temperature reaches and is slightly lower than 0℃, rivers begin to freeze on the shore and in the water. River icing is freezing in flowing water, which is different from lake icing. The freezing of the lake is limited to the water surface, and the temperature of the deep water is kept above 0℃. Due to the chaotic mixing of water flow in the river, the heat loss of water body occurs almost simultaneously in the whole water body. Therefore, rivers not only form thin ice and shore ice on the water surface, but also form ice on the water and river bottom. In addition to the thermal (temperature) effect, there are also dynamic factors and river factors:
Dynamic factors: mainly including water level, discharge, velocity, wind direction, wind speed and waves. During the freezing period, under the same thermal conditions, if the flow rate is large, the flow speed is fast, the wind speed in the downstream direction is high, and the ice transport capacity of the water flow is strong, and it is difficult for the ice cubes to stand still, the freezing date can be postponed or even not frozen; On the contrary, it is easy to freeze. In the melting period, under the same thermal conditions, if the flow rate is large, the velocity is fast, the fluctuation difference is large, and the wind force in the downstream direction is strong, it is easy to form? Five talk? ; On the other hand, easy to form? Wen Kaihe? .
River characteristics: mainly including geographical location, river direction and river boundary conditions. Under the same thermal and dynamic conditions, some sections freeze first, some sections freeze later, some sections are easy to form ice plugs and ice dams, and some sections are not easy to form ice plugs and ice dams. Generally speaking, in places with sharp bends, many bends and many beaches, ice begins to freeze first, and it is easy to form ice dams when thawing.
For friends in the south, if they don't go to the north, they may not have a chance to enjoy the wonders. Travel-loving friends who want to witness the wonders of ice can choose to go to some places in Xinjiang in winter and have the opportunity to meet them.