Traditional Culture Encyclopedia - The 24 Solar Terms - Natural disasters caused by heavy snow and solar terms: What are the hazards of ice flood?
Natural disasters caused by heavy snow and solar terms: What are the hazards of ice flood?
You may like pictures of snow and solar terms.
The complexity and particularity of the causes of ice flood determine its harmfulness. After the freezing of the river, the upstream water flow is blocked, which makes the water storage capacity of the river increase and the water level rise. When the river is thawed and opened, a part of the blocked water is released sharply and moves downstream, and the ice water increases along the way, forming the Ling Feng. When Ling Feng spreads from top to bottom, it is often an incremental process. Because of the resistance of ice to water flow, the water level in ice flood season is higher than that in ice-free period. In the year of serious ice jam, the water level of some river sections is high, and there are dangers such as floodplain, dike collapse, piping, water seepage, and even breaches. Although the ice flood is not as big as the flood in the main flood season, it has a great destructive effect on river courses and dike projects under the dynamic action of water flow.
What are the hazards of ice flood?
① Flood disaster caused by ice jam. It usually occurs in the freezing period, mostly at the backwater end of the reservoir with large slope change and relaxation, which lasts for a long time and the water level rises gradually, which is harmful to engineering facilities and human beings.
② Flood disaster caused by ice dam. Usually occurs during thawing. Most of them occur in the river sections with large differences between north and south latitudes, and the formation speed is fast. After the formation of the ice dam, the upstream water level of the ice dam rose sharply, the dike burst and the flood flooded.
③ Damage caused by ice pressure. Ice pressure is the force that ice directly acts on buildings, including the dynamic pressure caused by the impact of flowing ice, the static pressure transmitted to buildings by wind and water shear on a large area of ice sheet and the static pressure caused by the expansion of the whole ice sheet. 1February, 929, the ice dam in Lijin County, Shandong Province blocked the river, causing a breach and flooding more than 60 villages in Lijin and Zhanhua counties.
- Previous article:Is it suitable for tiling in winter?
- Next article:Love poems in spring
- Related articles
- Chang 'an Star dual fuel is not easy to ignite, it is difficult to increase the speed when burning oil, and there is the sound of ignition. The throttle valve at the nozzle has been cleaned. There is
- How about shocking China Mobile?
- Why is the summer monsoon landing in China stronger in the hot summer years?
- What does beginning of autumn eat for health in solar terms? Eating these foods in early autumn is good for health.
- What does it take to be a team leader?
- 2005 Regal 3.0 displacement throttle?
- What foods are suitable for keeping fit in rainy days?
- What's the temperature in Henan this Spring Festival?
- Hello, my car produces sunshine every day. Just now, the engine light was on. I went to check and said there was something wrong. Fault code.
- Ask Santana engine disassembly exercise report.