Excuse me, who can help me explain the relevant knowledge of "Didi Ling"

-

The Yellow River in the northern suburb of Jinan is a river that people love and hate. Lover, the cradle of Chinese civilization, has played an important role in cross-strait irrigation and transportation since ancient times, so it is also called "mother river"; People who hate it are often flooded in history, causing great losses to people's lives and property flowing through this area, so it is also called "harming the river".

The harm of the Yellow River is mainly caused by summer floods. It's frozen in winter, should I be honest? Not exactly. The Yellow River ice flood will still flood in winter and spring.

When winter comes, the temperature drops sharply, and the river will form thick ice cubes at low temperature, floating down the river, forming a "dripping" phenomenon. When the weather gets warmer in spring, the frozen Yellow River begins to thaw, and the unmelted ice cubes will also flow down the river, which will also form ice droplets. The scene of "Drip Mausoleum" is very spectacular. Liu E made a wonderful description of "Drip Mausoleum" in Travel Notes of Lao Can:

"The north wind blew for a few days. Ling was dripping in the river the day before yesterday. There was a big house in Ling's block, and the ferry didn't dare to go. If I meet Ling, I'm afraid it will break down. Yesterday, the ice jam in Shangwan was blocked. You can take a boat under this bay, but the ice jam by the river froze several ferries. "

"... I saw the upper-class ice, and it came at a long price piece by piece. When I got here, I was stopped by the person in front and stood still. Then later the ice caught up with it, and it only had crowded contempt. After the ice was pressed by the slippery water, it jumped in front of the ice; Before the ice is pressed, it gradually sinks. Look at the river, which is only a hundred feet wide, with a big slip of about twenty or thirty feet, and the banks are flat. This flat water field is covered with ice, but the ice surface is flat and covered with blown dust, but it looks like a beach. The middle one is slippery, but still surging and powerful, squeezing the ice that can't walk on both sides. The ice on both sides of the level water was crushed by the chaotic ice in the middle. Running to the shore, the ice can squeeze five or six feet to the shore. A lot of crushed ice is squeezed up like a small screen ... "

"Dripping ice" will not only bring great danger to the ferry, but also cause the water level to rise rapidly because of the mutual extrusion of large ice cubes in the water, which will lead to the ice cubes breaking their banks and causing floods. There are many records about the Yellow River ice flood in Jinan local chronicles, such as:

1883 (9th year of Guangxu reign in Qing dynasty) In February, during the flood season of the Yellow River, Luohe Luokou, Zhaojiadaokou, Liujiadaokou, Lijia 'an and Zhaofeng stations burst one after another, and the Yellow River in Changqing County was also flooded.

1884 (the tenth year of Guangxu reign in Qing dynasty) In February, the Yellow River was in ice flood, and Kongjiazhuang on the north bank of the Yellow River in Changqing County burst its mouth;

1February 23rd, 897 (in the 23rd year of Guangxu reign of Qing Dynasty), the ice jam in Licheng and Zhangqiu sections of the Yellow River caused the water level to skyrocket, and the small beach and Hujia 'an village at the junction of Licheng and Zhangqiu were washed away ... (The above is quoted from Cui Liming's Historical Memorabilia of Jinan).

After liberation, there have been many ice floods in the lower reaches of the Yellow River. Because the people's government took timely measures to organize people on both sides of the strait to actively prevent floods, and used methods such as manual blasting, artillery or plane bombing to make the ice body overflow quickly, avoiding the recurrence of disasters and ensuring the safety of people's lives and property on both sides of the strait.

In addition, in addition to the "trickle", the Yellow River will also appear "burst" and "burst" phenomenon. After the Yellow River is frozen, if the water flow under the ice decreases, the ice surface will sink, which is called "landslide"; If the water flow under the ice increases, the ice surface will swell. This is the so-called "ice collapse". Both "ice collapse" and "ice collapse" will happen suddenly, which is very dangerous for people crossing the river on the ice. □ Dai