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From July 7th to 12th, the meteorologists who came to China to observe, two groups of four meteorologists along the Yellow River quickly retreated, and Stagg expressed his desire to go to the vicinity of the Yellow River, so he flew here with Tu Changwang .
Tu Changwang: "We are not the only ones going against the current."
Stagg: "I see. It's the military."
……
What Stagg saw was the 20rd Regiment of the 58th Division of the 173th Army, which was ordered to reinforce the Yellow River embankment here.Huayuankou near Zhengzhou is the most dangerous part of the entire Yellow River embankment, but the river section here in Gongyi is also a river suspended above the ground.Steel bars were inserted into the ground one by one, and after the framework was erected, the soldiers of the 173rd Regiment and nearby militiamen carried sacks filled with soil to fill the framework built by the steel bars.
The levee has been raised by 1 meter as a whole, and the lower area of some dams is more than one meter.In addition, a large number of gravel bags are used to hold down the bank of the levee to increase the strength of the levee and prevent piping.
"I'm sure, it's really going to rain here, and it's heavy rain." While resting, a soldier raised his head and took a deep breath of the air on the bank of the Yellow River. "I smell water vapor."
"It's true, it was a little humid on the night of the 12th."
"It seems that the general headquarters predicted very accurately." "It's not the general headquarters, but the weather forecast department." "It's not right, it's the Meteorological Bureau..."
……
"Boom!" "Wow..."
At 7 a.m. on July 14, the Yanshi Meteorological Station first reported rainfall information.The raindrops were heavy and dense, and the comrades at the weather station thought it was a shower based on experience.However, half an hour passed, and an hour passed, and the raindrops were still so big and dense, and there was no intention of stopping at all.
Yanshi is between Luoyang and Zhengzhou. The daytime rainfall on July 7 ranged from Zhengzhou in the east to Mianchi 14 kilometers west of Luoyang in the west, and covered Qinyang across the Yellow River in the north.From 30 am to noon, afternoon, evening...
"In the past 24 hours, the rainfall reported by each weather station is 110 mm in Yanshi, 105 mm in Gongyi, 95 mm in Zhengzhou Station 97, 85 mm in Station 112, [-] mm in Mengzhou, and [-] mm in Luoyang," the correspondent reported to Huang Huayun. The scale of heavy rain and severe rainstorm."
"It's time to come." Huang Huayun said.
"Chairman, the rainfall between Luoyang and Zhengzhou reached the level of heavy rain and heavy rain yesterday, and the rain area is moving to the upper reaches of the Yellow River. At 2 o'clock in the morning today, there was heavy rainfall in Sanmenxia."
No need to look at the weather forecast, the roof and carriages of the special train are now being crackled by raindrops, and the scenery outside the train is blurred from inside the train.
Chairman: "The water is about to rise. The cadres and soldiers on both sides of the strait must be vigilant. They must guard the dam, but they must not ignore their own safety. Have the masses done the transfer work?"
Huang Huayun: "People in the two flood diversion areas have been transferred in the past week."
……
The comrades on duty at the Yanshi Meteorological Station felt that the rain on their heads was heavy enough. In fact, the duty officers at the Sanmenxia Meteorological Station were more stimulated than those at the Yanshi Station.
"Shuanzi, are you still looking at the rain gauge?" Lao Zhou, who was at the first stop in Sanmenxia, walked out of the hut. His partner, Shuanzi, was wearing a raincoat and staring at the rain gauge for measuring precipitation outside the house. He hadn't moved for half an hour.
"Old Zhou, this is not a rainstorm, nor is it a heavy rainstorm, this must be a very heavy rainstorm!"
Old Zhou: "I know, come and see how I test."
Lao Zhou was holding a washbasin in his hand, so he stretched out his hand to level the washbasin upwards. "Count the time, one, two, three... 1 minute, 2 minutes... 3 minutes, look."
In these 3 minutes, the washbasin received a small half of the rainwater.
In the early morning of July 7, there was widespread heavy rain between the Shanxi-Shaanxi section and the section from Sanmenxia to the main branch of the Yellow River at Huayuankou. At noon on the 15th, the rainfall intensity in the Sanmenxia area increased significantly.By the early morning of the 15th, the 16-hour rainfall at the first station in Sanmenxia was 24 millimeters, and that at the second station in Sanmenxia was 249 millimeters.
According to the terms of meteorology, within 24 hours, the rainfall within 10 mm is considered light rain, 10-30 mm is moderate rain, 30-50 mm is heavy rain, 50-100 mm is heavy rain, 100-200 mm is heavy rain, and more than 200 mm is heavy rain. heavy rain.
The average annual rainfall in the Yellow River Basin is only 500-800 millimeters, one-third of which falls in one day.
The soil in the middle and upper reaches of the Yellow River, which lacks vegetation, cannot hold precipitation. Such a large amount of rainfall is converted into runoff almost instantly, and the Yellow River must have a large flood peak.
What is even more worrying is that in the Sanmenxia area, where more than 24 millimeters of rain fell in the past 200 hours, the rain did not stop during the day on the 16th.
On the afternoon of July 7, the rainfall area moved slightly: the rain in Zhengzhou weakened and turned into light showers, and Sanmenxia turned from a heavy rainstorm to a heavy rainstorm, but the main stream section of the Sanhua section and the middle and lower reaches of the Yi, Luo, and Qin Rivers, the middle and lower reaches of the Fen River, Heavy rains fell in the upper reaches of the Beiru River and Shahe River in the Huaihe River Basin and the Tangbai River in the Han River.
……
Huayuankou.
Due to the Huayuankou dam explosion in 1938, this place has been the weakest part of the Yellow River embankment for 20 years, like a deep wound that has just healed, and it will tear if you don't pay attention.
In the Huayuankou embankment and beach area, three regiments of the 20th Division of the 59th Army guarded here. In addition, cadres at all levels, militias, mobilized masses, and even railway soldiers in Zhengzhou and surrounding villages and towns also sent reinforcements here. Hundreds of people were killed, and the number of rescuers on the Huayuankou Levee reached 14.
More than 59 vehicles of the 500th Division kept coming and going to transport flood control and rescue supplies. In addition, there were countless horse-drawn carts, shelf carts, tricycles, and wheelbarrows. If you look down from the air, it looks like there are three roads consisting of people and cars. The line is inserted into the embankment at the entrance of the garden, transfusing blood into this embankment.
A wheelbarrow can only hold a large stone, but on the muddy road after the heavy rain, the farmers who push the cart still take small steps to bring the stone to the edge of the embankment, and soldiers or militiamen will drag the stone to the top of the embankment.Hundreds of wheelbarrows lined up in long lines, and the embankment was so hard that it was reinforced with a layer.
"The height of the Huayuankou embankment has passed, and the second round of reinforcement is underway."
"The Qinchang Yellow River Diversion Canal to Jiwei Irrigation Canal has been raised by 1 meter to ensure the safe passage of floodwaters."
Huang Huayun: "How about the reinforcement of the Anshan Lake embankment?"
"The second round of reinforcement is underway. Anshan Lake lacks steel and bamboo, and cadres and the masses are using straw and earth bags to do reinforcement work."
Huang Huayun frowned, and sought coordination with the Materials Office of the Yellow Committee.
……
From noon on the 17th, the chairman stepped out of the special train and stood on the roof of a two-story building near the station for a long time.
From the roof of the building, you can see the Yellow River embankment in the distance. The Zhengzhou Yellow River embankment, which is more than ten meters above the ground, is like a yellow-brown skyline in the distance, and you can't see the end on the left or right.Although the distance is too far to see the details, it is conceivable that there must be countless people on duty on the embankment, ready to deal with danger at any time.
In the early hours of this morning, the Luohe, Yihe, and Qinhe rivers successively experienced flood peaks.According to rainfall projections, the peak flow at Huayuankou Station may exceed 20000 cubic meters per second.
"According to the flood control plan formulated by the Yellow Committee in 1956, when a flood of more than 20000 cubic meters per second occurs, the flood should be diverted at the Shitouzhuang spillway weir in Changyuan County." The comrades in charge of flood diversion of the Yellow Committee reminded.
People have been evacuated from flood diversion areas, but farmland will be flooded and homes will be washed away.There are 200 million mu of arable land there.
The irrigation canal of Qinchang was raised by 1 meter, and the maximum flood peak that could be tolerated was increased, about 22000~23000.
"Now is not the time to think about flood diversion," Huang Huayun said. "According to the rainfall and the flood situation that has occurred in the main and tributary streams, we are only one step away from victory. The weak part of the Yellow River embankment continues to strengthen. Please continue to watch the water regime change." , make a forecast as soon as possible.”
……
Zhengzhou Railway Bridge.
The muddy yellow river water had already licked the iron girders of the bridge, and the bridge had no bridge openings, nor did it look like a bridge, it looked like a black branch floating on the yellow muddy water.
Not only is the water level high, but now the impact area of the Yellow River water on the bridge piers has increased by 50%, and the flow rate of the river water has increased by at least 10%, so the impact force on the bridge piers is 70% greater than usual.Even with wagons loaded with wet sand on the bridge, the huge iron bridge trembled slightly in the flood.
On July 7, the maximum flood volume at the Huayuankou of the Yellow River was 17 cubic meters per second, and the Zhengzhou Railway Bridge passed through smoothly.
December 7th...
“预计7月18日，花园口最大洪峰是22000至22500立方米/秒。18日的洪峰是此次汛期的最高峰，从19日起，花园口的流量会逐渐减弱。”
The Zhengzhou Railway Bridge was out of service. Tu Changwang was on the south side of the Yellow River, and the chairman's special train was on the north side of the Yellow River. Tu Changwang could only communicate with Huang Huayun by radio.
Huang Huayun: "Is the news accurate?"