According to media reports, due to the influence of typhoon "Wambia", there were continuous heavy rains in Shouguang on August 18 and 19. The Mihe River Basin, which flows through Qingzhou, Shouguang and other places, has a rapid water potential, and the three reservoirs in the upper reaches discharge water at the same time. With the increase of flood discharge, the villages along the Mi River have been flooded by the river since August 20th. Many villages, including Kouzi Village, have been flooded one after another.
At the press conference on disaster relief on August 23rd, the relevant official of Weifang Municipal Government pointed out that "this' Wambia' flood disaster is the worst in Weifang since 1974, with great intensity, strong momentum and rare history."
Zhang Zengshun, director of Weifang Civil Affairs Bureau, said that the disaster caused 13 deaths and 3 people were missing. No one died during the mass transfer. Tian Qingying, deputy secretary of Weifang Municipal Committee and acting mayor, said that the disaster caused direct economic losses of 9.2 billion yuan.
■ At the scene
The villagers have begun to save themselves.
On the afternoon of 23rd, the accumulated water had receded, but the devastation left by the flood still showed its power. The waterline nearly 2 meters high on the wall of the village house is clearly visible. Bricks are brittle, too. If you stretch out your hand and scrape it gently, it will be a layer of brick ash.
Before the stagnant water completely receded, the villagers began to save themselves.
Outside, the soaked sofa is drying after cleaning, and there are large traces of sludge and water stains on the mattress supported by the roadside. Every household's wet clothes are also hung outside, and more discarded furniture, electrical appliances and toys are scattered on the roadside.
As early as before the "Wambia" transit, Weifang's major reservoirs had been full of drinks. Since March 23rd, Weifang has been affected by two typhoons, Abe and Capricorn, and suffered from heavy rainfall within one month.
According to Weifang Hydrology Bureau, the storage capacity of Weifang Reservoir increased by nearly 654.38+0 billion cubic meters in just one day when Typhoon Capricorn transited. As of 8: 00 on August 16, the storage capacity of reservoirs in the city was 438.56 million cubic meters more than that of the same period of last year, which was 242160,000 cubic meters more than that of the same period of last year.
Unexpectedly, a new round of precipitation came again two days later. /kloc-since August, 2008, the precipitation brought by Wambia has caused three reservoirs in Mihe River Basin to approach or exceed the water level at the end of flood season, and the inflow far exceeds the reservoir flow. On the same day, the upstream reservoir began to flood, and flood warnings were issued one after another.
18, Kouzi Village, the news of flood discharge was conveyed to the villagers by the village cadres. Several residents of Yingli Town also told reporters that they had received the news.
According to the Beijing News reported on August 2 1, Mr. Li, a farmer in Kouzi Village, recalled that it began to rain on June 19, and the old village with low terrain was the first to accumulate water.
It was not until the night when the flood entered the village that the villagers in Kouzi Village really realized the seriousness of the situation.
Some villagers recalled that on the morning of August 2 1 or so, "water flooded in" at the north gate of Kouzi Village, and the village cadres shouted "It can't be stopped, so evacuate quickly". At that time, the accumulated water in Kouzi Village flooded to the roof, with the deepest depth of 3 meters.
After dawn, police inspectors and village cadres began to pull up the cordon to prevent villagers from approaching the farm in the old village to prevent accidents. The villagers in Kouzi village were evacuated to a nearby school to take refuge.
The flood dealt a great blow to the aquaculture industry, and the pigs, foxes and chickens raised by the villagers were almost wiped out. Only the local dog kept by the villagers is lucky and still wanders around the village.
According to Zhao Lei, a villager in Kouzi Village, there are more than 80 pig farmers in the village, and nearly 20,000 pigs have been washed away or drowned. Zhao Lei's brother has raised nearly 400 pigs, and now there is only less than 10. "Still can't live. So many people died after the flood, and there will definitely be an epidemic. " Zhao Lei said.
■ Official release
Before Wambia arrived, the flood had been discharged.
After the flood, on August 23rd, Weifang Municipal People's Government held a press conference on disaster prevention and mitigation, saying that the flood disaster caused by Typhoon Wambia was the worst in Weifang since 1974.
Faced with the problem of why the flood discharge was not arranged in advance, Zhou Shouzong, director of the Weifang Flood Control and Drought Relief Headquarters Office and director of the Water Conservancy Bureau, said that from August 13 to August 19, the three reservoirs of Yeyuan, Heihushan and Songshan in the Mihe River Basin discharged a total of 20,945,800 cubic meters of flood discharge water. Before the flood season, the above three reservoirs also released water and stored 85 million cubic meters.
According to the announcement of the press conference, one of the reasons why the flood is so serious is that the actual precipitation far exceeds the forecast precipitation: the weather forecast on August 17 predicted that the precipitation of Typhoon Wambia was 40-70mm, but the actual precipitation far exceeded expectations. A large amount of precipitation caused the water levels of the three reservoirs to rise too fast, approaching the warning water level.
Zhou Shouzong said that in order to ensure the safety of the reservoir, according to the relevant regulations of the provinces and cities of the country, it was decided to discharge the flood downstream again. "If the flood is not discharged at that time, it will pose a serious threat to the safety of the reservoir, and there is even a danger of dam failure, which will affect the lives of nearly one million people downstream."
In addition, the Shandong Provincial Flood Control Office told the media on the 23rd that Shouguang was flooded because of the poor ability of the river to enter the sea. According to the previous law enforcement records and notifications, the buildings encroaching on the river include not only residents' courtyards and construction waste, but also business places such as gardens, fish ponds, farms and sand washing fields.
According to Zhang Zengshun, deputy director of the Weifang Disaster Reduction Committee and director of the Civil Affairs Bureau, after the disaster, the Weifang Municipal Government allocated 65 million yuan of municipal disaster relief funds in time. All members of the Municipal Disaster Reduction Committee actively deployed disaster relief machinery and equipment to restore roads, power supply and water supply. According to incomplete statistics, 20,600 quilts, 9,990 towels, 5 generators and on-site lighting equipment, 2,000 emergency flashlights, 2,500 single tents, 3,400 folding beds, 700 cotton tents, 65,438 towels +0 beds, 5,000 boxes of water and 65,438 instant noodles have been allocated to the disaster area.
■ History
The typhoon crossing the border six years ago also caused floods.
20 12 typhoon "David" transited, and the Yeyuan Reservoir in Linqu County in the upper reaches of the river was in a tight flood discharge, which led to the once-in-30-year flood in Kouzi Village.
At that time, the flooded river flooded 400 acres of corn fields, dozens of vegetable greenhouses and more than 60 farms in the old village on the west side of the village. But there is no water in the residential area of the village.
According to the report of Shandong Radio Station's 20 12 program "The Power of Truth", the stationmaster of Shangkou Town Water Conservancy Station in Shouguang City analyzed the reasons why Kouzi Village was flooded: First, the farm was improperly located and should not be built in a flood area; Second, don't build greenhouses. He said that it is against the relevant laws and regulations to engage in greenhouse and aquaculture in flood-prone areas. "If there is no flood, he will earn. If there is a flood, he will plant."
At that time, the mayor in charge of agriculture in Shangkou Town promised that all the farmers in Kouzi Village would move out through the land replacement index given by the new rural construction, and drew up a flood discharge plan for the relocation of the upstream reservoir, which was reflected to the superior.
However, when the program was broadcast, the mayor did not elaborate on the relocation and flood discharge plan.
■ Experts dispel doubts
There is no requirement for "clearing the reservoir" in the northern reservoir.
For this flood, some netizens suggested that the upstream reservoir should be "cleared" before Wambia crossed the border, that is, the water in the reservoir should be drained in advance. However, an expert who once worked in China Academy of Water Resources and Hydropower pointed out that one of the important functions of the Northern Reservoir is water supply. "Even if the weather forecast predicts a major flood, the northern reservoir only needs to reduce the water to the flood limit level instead of clearing the reservoir. For the northern reservoir, there is no requirement for' clearing the reservoir' in the regulations. "
In terms of reservoir capacity, public information shows that the total flood discharge capacity of Yeyuan, Heihushan and Songshan reservoirs exceeds 270 million cubic meters.
However, the above-mentioned experts told the Beijing News reporter that the northern region lacks water all the year round. In order to ensure water supply, many reservoirs in the north have to exceed the flood limit water level. In other words, the actual flood control capacity of the reservoir may be less than the designed flood control capacity.
Experts also said that according to the Flood Control Law, when there is heavy rain in the flood season, the water level needs to fall back to the flood limit level. In this incident, it is against the regulations if the reservoir runs beyond the flood limit water level without permission.
"But this is only theoretical reasoning. In fact, whether Shouguang's reservoir runs beyond the flood limit without approval requires the response of relevant departments. " The above experts said.
In addition, the above experts believe that excessive rainfall intensity may also be one of the factors causing floods. "In previous years, typhoons either went to Guangdong or saved Fujian through Taiwan Province. This year's typhoon went straight north through Zhejiang and Shanghai. " He said that in the case of several typhoons coming one after another, the reservoir may not be able to release water after storage, and it is necessary to protect the dam by flood discharge.
Should the people in the lower reaches of Shouguang, Shandong Province be affected by reservoir flood discharge?
In the video of a local disaster, a man stood in his flooded hut and cried, "My God, you are going to kill me." . According to the live shooting by netizens, on August 22nd, in the planting area in the northeast corner of Shouguang Ji Tai Town, the water level almost reached the top of the greenhouse, and everything was submerged.
Weifang Water Conservancy Director: No flood discharge is in danger of dam failure, and Shouguang is saddened by the loss.
If the flood is not discharged at that time, it will pose a serious threat to the safety of the reservoir, and even have the danger of dam failure, affecting the lives of nearly one million people downstream. At the same time, the municipal civil air defense office took measures such as peak shifting, peak clipping and flow control to intercept and store flood peaks through three reservoirs. At that time, the inflow peak flow was 4058 cubic meters per second, the outflow flow was 1780 cubic meters per second, and the peak clipping was 56. 1%. Despite the measures taken, the rainfall and precipitation gathered too fast, and the precipitation in Shouguang City in the downstream reached more than 200 mm, which brought great pressure along the route, especially in the downstream.
Living in a reservoir is very troublesome.
The news comes from Netease News.