Beijing encounters the largest precipitation firefighter in Luohe rescue

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The main precipitation process since Beijing’s entry into the flood season ended in the middle of the night yesterday. The current rainfall of this round accounted for one-sixth of the annual rainfall. It is currently expected that after the end of the rain, Beijing will usher in a “sauna day”, and the maximum temperature in the next week will exceed 30°C, of ​​which the maximum temperature on the weekend will reach 35°C.

Miyun Reservoir has a record high water storage capacity

Beijing's precipitation continued yesterday. Precipitation (mm) from 20:00 to 17:15 on the 15th showed that the average precipitation in Beijing was 98.1, the average precipitation in urban areas was 123.1, the northeast was 122.0, the southwest was 92.2, the southeast was 72.2, and the northwest was 58.2.

There are 334 stations in Beijing with a rainfall of more than 50 mm (453 in total), of which 210 stations have rainfall exceeding 100 mm, 15 stations are over 200 mm, and 2 stations are over 300 mm. Both stations are in Miyun. The maximum precipitation is 347 mm in the Miyun West White Lotus.

In addition, the reporter learned from the Municipal Water Affairs Bureau that as of 18:58 yesterday, the water level of the Miyun Reservoir reached 146.31 meters, and the water storage capacity was 2.204 billion cubic meters. The reservoir water level and water storage capacity both reached a record high since 1999. This is also the time when the water storage capacity of the Miyun Reservoir exceeded 2.2 billion cubic meters in 20 years.

The reporter learned that the increase in water storage was mainly due to rainfall since the flood season. In addition, with the arrival of Nanshui in Beijing, the main source of Beijing water supply has been turned from Miyun Reservoir to South Water, and the amount of storage has been greatly reduced.

The Beijing Meteorological Bureau said that from 20:00 on the 15th to 16 o'clock yesterday, that is, within 44 hours, Beijing had one-sixth of the annual precipitation. It is reported that Beijing's annual precipitation is generally between 600 and 700 mm.

Will welcome the "sauna day" in the coming week

When does the rain end? The forecast shows that the main rainfall process ended in the middle of the night after yesterday. But today the weather is gloomy, and the sun is completely seen until tomorrow. After the rainfall, Beijing will welcome the “sauna day”. In the coming week, the highest temperature in Beijing will exceed 30 °C, and the highest temperature on weekends will reach 35 °C.

According to the forecast of the Central Meteorological Observatory, from the night of the 17th to the morning of the 18th, there were moderate to heavy rains in northeastern Hebei, most of Beijing, and northern Tianjin. Among them, there were heavy rains or heavy rains in the north of Beijing and northeastern Hebei, and the accumulated precipitation in the above areas was 20 -50 mm, local 80-120 mm; maximum hourly precipitation 30-50 mm, local area above 70 mm.

â– Deployment

Cai Qi commanded and dispatched Beijing flood control work

At 7:50 in the morning, the Secretary of the Municipal Party Committee, Cai Qi, came to the duty room of the Municipal Party Committee and connected the Municipal Flood Control and Drought Relief Headquarters through the video system as well as the Xicheng, Haidian, Fengtai, Shunyi, Huairou, Miyun and other district emergency offices, the Municipal Meteorological Bureau and the Municipality. The drainage group and other units will inquire about the flood control and rescue situation in detail, and command and dispatch flood prevention work. Cai Qi pointed out that it is necessary to always put the safety of people's lives and property in the first place, party members and cadres together with the masses, where are the masses, and where are the party members and cadres. In the afternoon, Chen Jining, deputy secretary of the municipal party committee and mayor, went to Tongzhou District to inspect flood prevention work.

Cai Qi pointed out that the majority of party members and cadres should rush to the front line of flood control, keep abreast of the situation, and deal with unexpected problems in a timely manner. Important points must be guarded. It is necessary to step up inspections, go to the homes of people who are leaking rain, and send their concerns to the door. The Drainage Group should go all out to concentrate on the serious accumulation of waters discovered and complained by the people in a timely manner.

Cai Qi demanded that it be necessary to repair in time and start temporary power supply equipment to ensure the basic needs of residents. In response to Huairou and Miyun have transferred villagers, Cai Qi demanded that the people in the dangerous villages should be transferred to live and live well; they should pay attention to prevent secondary disasters caused by geological disasters and heavy rains, and prevent landslides and mudslides from happening. Water cuts and breaks should be repaired in the first place to ensure the normal life of the people and the passage of traffic trunks; the flood season has not passed, and the grievances have not passed. All the cadres must go to the village to work with the masses to organize flood prevention and rescue work in the village area. There is no dead end to the flood control measures; we must seize the national highway, do a good job in traffic guidance, and ensure the safety of passing vehicles; we must do a good job of stranded tourists and strengthen the management of farmhouses and folk villages.

Cai Qi emphasized that under the unified dispatch of the Municipal Flood Control and Drought Relief Headquarters, the weather forecast should play the role of a staff assistant and further strengthen the consultation and judgment. It is necessary to use scientific and technological means and combine with current trend forecasting. The departments at all levels in the city should not be numb to the early warning work. No matter whether the rain or rain is small, the work should not be relaxed. The Meteorological Bureau should make a sound in time and do a good job in forecasting and warning services.

Cai Qi finally stressed that the Standing Committee of the Municipal Party Committee and the Deputy Mayor should lead the team to the grassroots level inspection, as soon as possible to eliminate the danger of the disaster and ensure the safety. It is necessary to do a good job in prevention of geological disasters and secondary disasters after heavy rains, and prevent landslides and collapses in northern mountainous areas and urban work sheds. It is necessary to attach great importance to the work of restoring production and rebuilding homes in the affected areas such as Miyun and Huairou, to prevent the occurrence of epidemics, and to timely allocate funds for disaster relief, and to ensure the city's special funds.

Yesterday afternoon, Chen Jining rushed to Tongzhou District to check the first-line flood prevention work. At the construction site of the Da Yingcun affordable housing project, Chen Jining required strict construction specifications to guard against safety accidents and suspend operations in case of heavy rainfall.

â– Site

Miyun Xibailian Village in the rainstorm

It rained for three days.

According to meteorological information, there are two weather stations with a rainfall of more than 300 mm in Beijing, all in Miyun. The largest amount of precipitation is in the village of Xibailianyu, reaching 348.5 mm.

The stagnant water ran down the mountain, and the nearby river that was already dry was quickly filled. After the road collapsed, it turned into a river. The villagers’ vehicles were washed out more than 70 meters, and 33 tourists were trapped...

At 11:30 last night, the rain was still not resting. Because of the timely transfer, there was no casualty in the “big water”. "Three days did not close my eyes, and I struggled for another night. The safety was over the morning of the 18th. The problem was not big." The village committee staff said.

Dry river filled with muddy water

The rainstorm began on the night of the 15th.

Water mixed with stones poured down the river from the river, and the water level of the White River soared – the river ushered in the biggest flood in 20 years. Soon, the mountain collapsed, and the arch culvert of the K24+500 section of Yanxin Road was destroyed, and the section of about 70 meters was damaged.

Along the direction of Baihe to Baimaguan River, 50 kilometers to the north, you can see the two archways of Xibailianyu Village in Fengjiatun Town.

This is the most rainy village in Beijing. According to the Miyun District Meteorological Observatory, at 19 o'clock on the 16th to 19 o'clock on the 17th, the village's precipitation reached 348.5 mm.

The villager Liu Yaying recalled that the originally dried up river next to the house was soon filled with muddy water that had washed out from the mountains. "The river is on the road, the water in the house is also on the knees, and I have been drowning outside, and I dare not rest."

"This river has been dry for four or five years. The heavy rain washed away the lower stones and sand in the multi-section, the road collapsed and the ditch widened." Another villager introduced.

The rain is getting bigger and bigger. At 4 o'clock in the morning on the 16th, the village representative Li Xiuling quickly sought another village representative, Zhao Boqing, and wanted to take the villagers to the safe haven, not far away. At the beginning of last month, the village just organized villagers to conduct flood control and evacuation exercises. Everyone was familiar with the escape route.

Zhao Boqing went to the village to inform the villagers. One of the families lived with a 78-year-old grandmother who was inconvenient in her legs. The juniors were working outside the house on weekdays. Only the nanny was accompanying him. He quickly supported the old man.

"He shot the door and said that he had to go quickly. The road was broken. We couldn't see it along the way. We heard the big stone hitting the river and hit the train. It was like a train rumbling." Liu Yaying recalled.

Road collapsed, 3 people fell into the river

In less than half an hour, the villagers moved to the high-rise earthquake shelter.

Finally, I was informed of Guo Xiulian’s family. She didn't often live in the village. This time, she brought her two daughters, daughter-in-law and grandchildren, together, to return to the summer weekend. I didn't expect to encounter heavy rain.

Zhao Boqing recalled that he had just walked to Guo Xiulian’s house and saw that her red car was washed away by the river flowing over the road. “It rushed out more than 70 meters and finally hit the tree and stopped.”

"Let them wait for me to look at the road and follow them out. It may be too anxious. I just came out after reading the road." He said that the asphalt road suddenly collapsed, and he and Guo Xiulian's big son-in-law and two-year-old granddaughter fell into The river is flooded in an instant. "I grabbed a gravel and put my head out of the water. When I saw the little girl being pushed out of the water by her father, she quickly caught it and forced her to the sand on the road and dragged her father."

Zhao Boqing said that during the whole process, the mother of the little girl, with her 12-year-old brother, stayed by the side. "Let them take the kids to run quickly, don't get stuck in the time, but they don't want to go, but also reach out and pull."

At 6 o'clock on the 16th, in order to prevent the road from being damaged and could not be replenished in the earthquake shed, the villagers decided to transfer to the village committee and then transferred to the new village of Wenjia Village, which is the closest natural village to the valley. Due to the mudslide relocation policy in the district, most of the villagers moved to a nearby highland, leaving only a dozen households still living in the old site.

Firefighters rescue the river

Yesterday, there were still more than 10 collapses in the road to the village. Many trees and poles fell to the ground. One of the original 6-meter-wide tarmac roads turned into a river, and the rushing river was mixed with pieces.

Along the way, there are also destroyed crops and broken plastic greenhouses as well as fungus sticks planted along the coast. “These fungus sticks and the melons and loofah planted in the greenhouse are all poverty alleviation projects in the village.” The villagers introduced. Fu Xinhua, a staff member of the Propaganda Department of the town government of Fengjiatun, also said that these crops are growing very well. This year, they have already received a sip. After a while, they will receive a second sputum. They did not expect to be completely destroyed.

There are also 33 tourists trapped, one of whom is a pregnant woman. They used to play in the farmhouse "Lumingshanju" in the deepest valley of the village. Because the road collapsed, it was rescued until noon on the 17th.

At 9:20 on the 17th, when the fire truck arrived at the entrance of the village, the stagnant water still ran down the mountain, and the road to Lumingshan was seriously sunk. Many places were destroyed. Fire officers and soldiers wear life jackets, carry rescue ropes, and land on satellite phones. 6 km, passed through 3 rapids and arrived at the scene in an hour.

"It’s great to see you!” Lumingshan was at the door, the trapped people said. Fire officers and soldiers wear life jackets for the elderly and pregnant women. "The road has been washed for a long time, the foundation is very unstable, and it is possible to collapse again at any time."

The safe transfer has to go through three collapsed sections. The longest one is completely broken into two sections. The only passage is only a section of the road after the landslide, and it is flooded by the flood. It is impossible to make a rescue fulcrum. The commander chooses to send a soldier to brag. The rushing river will pass through and use the body as a fulcrum to ensure the smooth progress of the rescue work.

After 3 hours, all 33 people were safely transferred.
Interpretation 1

Why is the rainfall lasting for a long time?

Zhang Fanghua, chief forecaster of the Central Meteorological Observatory, said that the strong precipitation process in North China has the characteristics of long duration, obvious formation characteristics, strong local rainfall and large accumulated precipitation. The rain began on the night of the 15th and lasted until the 17th. Local heavy rainfall is mainly distributed in the transition zone between plain and mountainous areas, namely Miyun, Huairou, Changping, Shijingshan to Fangshan.

Why does rainfall last for a long time and is strong? Zhang Fanghua said that, first of all, the subtropical high pressure is located to the north, and the high-altitude trough moving eastward with the northwestern region forms a strong low-level jet stream in the North China Plain, providing abundant water vapor conditions and dynamic conditions for precipitation. Secondly, the subtropical high is relatively stable and blocked by it. The high-altitude trough is strengthened and the moving speed is slow, resulting in long duration and high intensity of rainfall. In addition, in the convective unstable environment of high temperature and high humidity in North China, the convection development is strong, so the precipitation efficiency is high and the short-term rain is strong. Finally, the Beijing area is surrounded by mountains on three sides, and the elevation of the terrain along the mountain area also enhances rainfall.

The National Climate Center monitoring showed that the rainy season in North China began on July 9 in 2018, 9 days earlier than normal (July 18).

Interpretation 2

Why is the water in Huilongguan and other places serious?

During the rain, there were still “seeing the sea” in some areas. Among them, the Huilongguan and Xierqi areas once had water breaks. In this regard, Liu Hongwei explained that the short-term rain intensity in the area is relatively large, and the infrastructure in the area is not complete enough, such as the lack of supporting pipelines, etc., the comprehensive impact caused the water accumulation. Work has been carried out with the planning department to improve the flood control capacity of the area.

How to prevent serious water accumulation from happening again? The relevant person in charge of the Municipal Flood Control Office said that when the rain is strong, it is inevitable that water will accumulate. Before the rain, the points of easy accumulation of water will be controlled in advance, and there will be timely rescue of water.

The water accumulation point is mainly distributed in the southern part of the city and the plain suburbs, which is also the focus of later work. After that, the reasons will be analyzed according to the point where the accumulated water will occur, and plans will be made from various aspects such as planning and engineering to promote the management of the water level.

Interpretation 3

Why does Miyun cost the rainstorm center?

The Beijing Meteorological Observatory released precipitation shows that the two stations in the city with more than 300 mm of precipitation are in Miyun. In this round of rainfall, the Miyun Baihe River also experienced the largest flood since 1998. The Municipal Hydrological Station issued the first flood warning signal in Beijing this year. However, after 5 hours, according to the monitoring data, the flow rate of the Baihe Zhangjiafen hydrological station dropped from 1,300 cubic meters per second to 233 cubic meters per second.

In this regard, Liu Hongwei, spokesperson and chief engineer of the Municipal Flood Control Office, explained that this is a natural drift. The short-term rain intensity is large, resulting in a short-term runoff, but due to the short rain time, the duration is not long. In other words, the flood peaks passed quickly, which is also a feature of Beijing.

Why did Miyun become the center of this round of rainstorms?

The uneven distribution of annual precipitation in Beijing is closely related to the topography. As the warm and humid air from southeastern Beijing is lifted by Yanshan and Taihang Mountains, the windy slopes often form a rainy area in front of the mountain, while the leeward slope forms a less rainy area.

That is to say, the flood-prone areas in the Beijing area are distributed along the windward belts of the Yanshan and Xishan mountains. The mountainous situation in the mountainous areas enhances the ascending movement of warm and humid air, thus promoting the development of the cloud and the precipitation will be larger.

During the current round of precipitation, the combination of ultra-low-level jets and topography resulted in heavy rains falling mainly in the western and northern foothills. After 23:00 on the 15th, the southwesterly airflow in the boundary layer was significantly strengthened into an ultra-low-level jet stream. Under the combined action of the ultra-low-altitude southwest rapids and topography, the dynamic and water-steam conditions in the western and northern piedmont areas are more conducive to the occurrence of heavy rainfall, with heavy rains and heavy rains in the southeastern part of Fangshan and in the southern front of Miyun.

Interpretation 4

What is the situation after the easy accumulation of water points?

After the annual flood season, Beijing will manage a number of easy water points, which will generally involve areas with severe water accumulation in the previous year. For example, in 2016, Beijing concentrated on the study of a concave inverted bridge with serious water accumulation.

In the current rainfall, what are the current water accumulation points in previous years? Liu Hongwei introduced that after years of river channel, pipeline treatment and upgrading of urban pumping stations, the accumulated water points after treatment have been improved under the same rainfall conditions, and the accumulated water can be alleviated or eliminated.

According to the person in charge mentioned above, urban drainage is a complete system, and the rainwater needs to smoothly enter the pipeline to be discharged into the river. If only a certain part, such as a pumping station, is to be rebuilt, the rainwater is accumulated in the pipeline and the water cannot be discharged successfully. Conversely, if the water in the river is full, the rainwater in the pipeline will not be discharged smoothly, which will still cause water accumulation.

For example, in the “7·20” torrential rain in 2017, the Lize Bridge and the Beijing-Hong Kong-Macao Expressway Nangangyu section had caused a two-way break due to the accumulation of water. Since then, a 30,000 cubic meter reservoir has been built near the Lize Bridge area, and Gao Feng The grass bank embankment can increase the capacity of the bridge area and reduce the risk of flooding.

Interpretation 5

Why is Beijing raining in late July?

In Beijing 2012 “7·21”, the city's average rainfall was 170 mm, and the urban average was 215 mm. From July 19 to 20, 2016, the average rainfall in the city and the urban area of ​​Beijing exceeded the average rainfall of “July 21”. Until yesterday, the biggest rainfall since Beijing entered this year is still going on. The latest forecast shows that on the 18th to 21st, a rainy weather process will occur in the eastern part of the northwestern region, northern North China, and northern part of the northeastern region.

Why is there rain and heavy rain in Beijing in the middle and late July?

According to the meteorological department, the period from the end of July to the beginning of August is the peak period of rainfall in northern China, which is also called the “seven downs and eights” main period. Judging from the distribution of rainy season in China, the annual rainfall is mainly concentrated in the northern part of the “seven downs and eight” main areas, including North China, Huanghuai area, southeastern part of China and parts of Shaanxi, Gansu and Ningxia in the Loess Plateau.

The reason why the "seven downs and eight"s in northern China have frequent rainfall is closely related to the location of the western Pacific subtropical high. The western Pacific subtropical high is a semi-permanent high-pressure circulation system over the Pacific Ocean. It has an important impact on China's weather and climate. It is an important weather system for transporting water vapor to the mainland of China. It can be said that the seasonal activities of north-south movement and subtropical high in China's rainfall belt are in the shadow. Follow.

From the end of July to the beginning of August every year, the centerline of the subtropical high moves northward past 30 degrees north latitude, and the warm and humid airflow around the west side of the river transports the water vapor on the ocean surface to the north land for North China, Northeast China and Beijing-Tianjin area. The heavy rainfall has laid a good foundation. Once the warm and humid air meets the cold air moving south, it will create a large-scale rainfall process in these areas. If the main body of the subtropical high continues to expand northward, covering the Beijing-Tianjin area, it will be followed by a humid and humid sauna weather.

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