The cold spell that has just passed
Let the whole country enter the "quick freezing" mode synchronously
Friends from the north are happy to do it
When playing "Ice Skating".
The "Southern Little Potatoes" are also on the doorstep
Opened the "Ice World"
Days
The scenery of the "Frozen West Lake" attracted
Many citizens and tourists watched
A common sight of frozen lakes in the north
What's so special about West Lake?
The "Frozen West Lake" that has not been seen for many years
West Lake is also known as Qiantang Lake
It is located in the west of Hangzhou City, Zhejiang Province
The lake is divided by the White Causeway and the Su Causeway
Waixi Lake, Beili Lake, Yue Lake, Xili Lake
and Xiaonan Lake
West Lake is located south of the Qinling-Huaihe River line
It belongs to the subtropical region
The average winter temperature is above zero degrees Celsius
It is difficult to achieve icing conditions
Therefore, ice formation in West Lake is not common
In particular, the Outer West Lake is widely frozen
The number of occurrences is extremely rare
A cold snap that previously affected the whole country
The temperature in Hangzhou plummeted below zero degrees Celsius
The surface of the lake quickly froze
Through the ice
You can clearly see the autumn leaves and dead lotus in the lake
Many local residents come here to check in
Even "old Hangzhou" is talking
The sight of the "Frozen West Lake" has not been seen for many years
Why is it difficult for West Lake to freeze?
Image courtesy of Metropolis Express
According to the Hangzhou Meteorological Information Center
January 1977
It is the worst large-scale ice in West Lake in decades
The entire West Lake is covered with thick ice
It is called "good skating on the West Lake" by the citizens
In addition to meeting low temperature conditions
The ice of the West Lake still needs to be met
Wind speed, humidity, low temperature duration,
Water depth, water flow rate, etc
There is a possibility of freezing
For a long time, the dredging of West Lake and the introduction of living water
It has become difficult for West Lake to freeze all
important reasons
After the founding of the People's Republic of China
The West Lake has been dredged three times
1951—1958
A total of 7.2 million cubic meters of silt was excavated in the first dredging
The average water depth of West Lake has increased from 0.55 meters to 1.8 meters
1976–1982
The second dredging excavated a total of 180,000 cubic meters of silt
1999–2003
The third dredging and dredging of 3.4 million cubic meters of silt
Since then, the average water depth of West Lake has reached 2.27 meters
In the spring of 1954, the "West Lake No. 1" dredger that had just been launched The picture comes from Hangzhou.com
1982
In order to make the "source of living water" healthier
West Lake brings in 400,000 cubic meters of Qiantang River water every day
After flocculation and precipitation
Through Xiaonan Lake, Yuhu Bay, etc
Six inlets flow into the West Lake
Then through the West Lake South Line, West Line, and North Line
9 outlets flow
Realize the water exchange of West Lake
Increased water flow velocity
Evens out the temperature of the water
It is also less likely to form ice
Although widespread ice in West Lake is uncommon
However, it is affected by strong cold air in winter
Local icing also occurs from time to time
Usually concentrated
Beili Lake north of the White Causeway
and the range of Xili Lake west of Su Causeway
Due to the small size of these two lakes, they are backed by mountains
The wind is weak and the lake is calmer
The temperature is 1~2 degrees Celsius lower than that of Waixi Lake
Easier to freeze
Rare lotus pond ice flowers, waves hit ice creams
aroused the "ice chaser" to compete with onlookers
This is the West Lake where "heavy makeup and light makeup are always appropriate".
For the citizens who love her
A wonderful winter gift
Compiled by China Water Affairs Comprehensive Qianjiang Evening News, China Meteorological Administration, Zhejiang News, etc.
Editor: Xiang Yanhong