Skip to comments.Record flow tests Three Gorges Dam
Posted on 07/25/2012 1:47:01 PM PDT by DeaconBenjamin
The Three Gorges Dam yesterday withstood the most intense onslaught of water since its completion, while cities upstream of the Yangtze River fought some of their worst flooding in three decades.
Nationwide, 111 people have died from torrential rains and 47 have gone missing since Friday, the Ministry of Civil Affairs says.
Flood-control authorities along the Yangtze and drought-relief headquarters have begun responding to a level-two emergency, the second-most severe of five warning levels.
State media said floodwaters were running through the Three Gorges Dam at 70,000 cubic metres per second, the volume of 28 Olympic-sized swimming pools, in the afternoon.
The inflow was expected to reach 71,300 cubic metres per second around 8pm before slowing after midnight.
That is slightly higher than a previous peak of 70,000 cubic metres per second in the summer of 2010, and much higher than levels in 1998, when floods killed more than 3,000 people while the project was under construction.
The dam is reducing the rains' impact on communities downstream by storing about 26,000 cubic metres of floodwater every second, according to Xinhua.
It has also been generating electricity at its full capacity for 12 straight days due to strong inflows, Xinhua says.
Zhang Cheng, general manager at dam operator China Yangtze Power, told Xinhua that all 32 turbine generators were in good shape, generating 540 million kilowatt-hours a day.
In Shanghai, 80 per cent of the city's households use an average of 260 kilowatt-hours a month.
China News Service reported that more than 1,000 vessels were still waiting to pass through the dam's gates yesterday.
In Chongqing, upstream of the dam, the worst floods in 30 years forced 66,000 residents to evacuate. No fatalities were reported, but electricity and water supplies were disrupted. Some residents gathered at Chaotianmen pier at noon to watch the floods.
Volunteers used a boat to help people stranded by flooding in Baisha in Chongqing's Jiangjin district. The area had been without power for more than 24 hours, a local resident said. In the south, a tropical storm reached Taishan in Guangdong province after buffeting much of Hong Kong a day earlier.
The storm has weakened from a typhoon, but still caused the evacuation of more than 42,000 people in the Guangdong city of Maoming.
Authorities had begun preparations to cope with possible "flash floods, mudslides, landslides and other disasters".
In Shenzhen, five workers suffered minor injuries, while thousands of trees were uprooted and some streets were flooded.
Three workers in a logistics park suffered minor cuts when the metal roofs of houses collapsed. Two people were mildly hurt when a builder's shed collapsed, local officials said.
They were sent to hospital.
State media said that even in its weakened state the storm could still dump 300 millilitres of rain in Guangxi province, after it passed through Guangdong.
Natural disasters have affected about 110 million people on the mainland this year.
when this thing goes, it will be epic.
I’m wondering about the additional weight of that water on the underlying rock formations. There have been reports in previous years that pointed to some potentially serious problems there.
But still you are right when/if that dam goes it’s going to be a disaster of a biblical nature.
Who has a nuke and hates China enough to lob one their way, at this damn dam?
What a weak storm! Only a third of a quart of rain water is going to fall on the whole province! Draught!
Amusing misuse of measurement units here, all right.
I think they mean milliMETERs. This would be about a foot of rain as we know it in the proudly unmetric USA.
Some have blamed ‘tremors’ on the extra weight of water.
“...111 people have died ... and 47 have gone missing...”
I think “gone missing” is a strange use of words,
but it is better than when they say that someone “turned up missing”.
The dam can’t fail. It’s made in CHINA.
Water weight ought not to be enough to effect earthquake by slippage at geological faults which is due to far larger geological forces. But if the area itself is suffering earthquake from other sources, that ought to be pretty “dam” worrisome to the Chinese.
As for environmental complaints, they surely have something there concerning what this damn dam has done to the Yangtze, turning it into a great toxic waste sluice. Something like this wouldn’t have been tolerated in the USA for many decades. Where is Greenpeace when you need them?
Does this dam have the potential to change climate...world wide?
The World’s Largest Tampon.
Water weight ought not to be enough to effect earthquake by slippage at geological faults which is due to far larger geological forces. But if the area itself is suffering earthquake from other sources, that ought to be pretty dam worrisome to the Chinese.
In my own area of the U.S. at the Wolf Creek Dam that holds back Lake Cumberland, we have seen some disturbing information about the underlying rock formations.
In our case it is mud and gravel filled pockets in the limestone formations that have started to “wash” away once the water weight opened up cracks to allow water penetration that will allow those deposits to turn into a slurry that can be more easily washed away. And if they go away the dam will collapse. This sort of thing wasn’t foreseen in the original geologic survey before the dam was built.
Now the same thing “could” happen to the Three Gorges dam. Maybe not the exact same sort of thing but something that was overlooked in the original Geologic Survey for that dam.
The failures of the levees in New Orleans during Katrina were the same sort of thing, if I understand it rightly. The footings did not go as deep as they ought to, and the soil around them washed out allowing the levees to move and let water into the city.
One would hope for the Chinese’ sake that China was far more conservative about footings for the Three Gorges Dam. Also in China one can get executed for things that would only be civil offenses in the USA, should they prove deadly. But perhaps only God, and the ones who actually dug and poured for the footings, know.
Where’s Looty Guy with his milk crate full of Heineken?
Often overlooked now days.... The Chinese Givernment OWNS everything in China..
Everything.. including the People..
Chinese people have ZERO rights.. NONE..
These negative storys in any communist givernment are silly..
You don’t get any nastier than Communism...
The “false patina” that a communist givernment “CARES” about the people is bull squeeze..
Last century comunnist givernments MURDERED at least 200 million of their OWN people.. and made BILLIONS more miserable.. i.e. some say 300 million
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