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From the discussion and video, would it be accurate to say the backup lake is too small to contain enough water to prevent flooding upstream, and then the dam has to discharge the water and flood downstream to relieve upstream flooding and prevent dam failure? What would have happened if the dam wasn't there and this amount of rain occurred? | |||
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Vi Veri Veniversum Vivus Vici |
If I read this right the Chinese blowing the dam just killed 100 people downstream?? "China blasted a dam over a river in Anhui province on Sunday to discharge the surging flood waters as torrential rains and floods wreaked havoc in the country, killing over 100 people. The dam on the Chuhe river, a tributary of the mighty Yangtze River, was destroyed with explosives to ease the flood control pressure in the river basin, state-run CCTV reported. Water levels on many rivers, including the Yangtze, have been unusually high this year because of torrential rains. The Three Gorges Dam on the Yangtze last week opened three floodgates as the water level behind the world's biggest dam rose more than 15 metres above flood level. Last week, official media reported that over 140 people were killed or missing since June. On Sunday, China's national observatory renewed a yellow alert for rainstorms, as incessant downpours would continue to wreak havoc in vast stretches of the country." LINK _________________________ NRA Endowment Member _________________________ "Of all tyrannies, a tyranny exercised for the good of its victims may be the most oppressive. It may be better to live under robber barons than under omnipotent moral busybodies. The robber baron's cruelty may sometimes sleep, his cupidity may at some point be satiated; but those who torment us for our own good will torment us without end, for they do so with the approval of their own conscience." -- C.S. Lewis | |||
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Member |
I read the same thing on a different channel today & it looked to me like they were summarizing the death toll over the last couple weeks. The only video I could find that purported to show the dam that was blown was an earthen dam that seemed to be almost entirely covered already, could have been a bad vid link tho. <>< America, Land of the Free - because of the Brave | |||
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Member |
This video talks about the chinese opening dikes to flood secondary holding areas. It claims if the chinese government gives warning in advance they're liable for the damage. If they claim a natural disaster then they're not. Sounds like something a despotic government would do.
https://www.youtube.com/watch?v=VhpSFEevfxw ____________________________________________________ The butcher with the sharpest knife has the warmest heart. | |||
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10mm is The Boom of Doom |
Has the flooding started to go down? The budget should be balanced, the Treasury should be refilled, public debt should be reduced, the arrogance of officialdom should be tempered and controlled, and the assistance to foreign lands should be curtailed lest Rome become bankrupt. People again must learn to work, instead of living on public assistance. ~ Cicero 55 BC The Dhimocrats love America like ticks love a hound. | |||
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Gracie Allen is my personal savior! |
Theoretically, localized flooding up and down the river. The big deal with a dam is that it stores up (a massive volume and weight of) water, so a sudden release is likelier to be catastrophic. | |||
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Member |
no one of the videos said another heavy amount of water is supposed to arrive tomorrow ------------------------------ Proverbs 27:17 - As iron sharpens iron, so one man sharpens another. | |||
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At Jacob's Well |
Lefty Sig Dams serve to modulate water flow, or, if you'll excuse the expression right now, flatten the curve for downstream water. Without the dam, excess rainfall leads to localized flooding that works its way down the river as the whole system slowly drains toward the ocean. What the dam does is retain some of that flood water and release it in a controlled manner so that there is no downstream flood. That's the goal anyway, as well as to generate power from the hydraulic head. However, flooding as bad as what they've seen in China basically renders the dam useless as a flood control device, at least temporarily. Once the water level in the reservoir behind the dam reaches the safety threshold (maximum pool), the dam has to pass through all of the upstream water that comes to it or risk structural failure. Once the water levels begin to drop, the dam will begin to function again for flood control and slowly discharge the excess reservoir water. J Rak Chazak Amats | |||
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10mm is The Boom of Doom |
A real world metaphor for Minsky's theories that policies intended to minimize economic risk may reduce the frequency of crises but increase the magnitude of downturns, as risks accumulate to the point that once triggered, the consequences are truly calamitous. The budget should be balanced, the Treasury should be refilled, public debt should be reduced, the arrogance of officialdom should be tempered and controlled, and the assistance to foreign lands should be curtailed lest Rome become bankrupt. People again must learn to work, instead of living on public assistance. ~ Cicero 55 BC The Dhimocrats love America like ticks love a hound. | |||
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Lawyers, Guns and Money |
At that point the question becomes can they release enough water to keep the water level from rising beyond the safety threshold? What if new water is coming into the pool faster than they can release it? "Some things are apparent. Where government moves in, community retreats, civil society disintegrates and our ability to control our own destiny atrophies. The result is: families under siege; war in the streets; unapologetic expropriation of property; the precipitous decline of the rule of law; the rapid rise of corruption; the loss of civility and the triumph of deceit. The result is a debased, debauched culture which finds moral depravity entertaining and virtue contemptible." -- Justice Janice Rogers Brown "The United States government is the largest criminal enterprise on earth." -rduckwor | |||
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Gracie Allen is my personal savior! |
Which would be why they blew up that other dam. | |||
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Member |
Thanks for the explanations. So if they had made that lake deeper to hold more water, maybe they would be better off? But that would mean a bigger dam, right? Just remember, official CCP disaster death tolls are an order of magnitude or more understated. So that 100-some number is really 1000-some. For example, a mine caves in and and more than 100-200 miners never come home. Doing what digging they can, they find 13 bodies. Therefore, the death toll is 13. No body, no death. This happened in a friend's hometown. | |||
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Member |
i read its the largest electricity producing dam in the world ---------------------------------------- Proverbs 27:17 - As iron sharpens iron, so one man sharpens another. | |||
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Peace through superior firepower |
Not for long. More rain in the forecast. ____________________________________________________ "I am your retribution." - Donald Trump, speech at CPAC, March 4, 2023 | |||
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Member |
Sad for folks downstream. Karma for the ccp regime. | |||
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Member |
Those are good questions. I would think during the design phase of a dam, you'd look at the worst projected inflow volume case, then double it. Design the outflow capability to that value, something like that. Not being able to release water fast enough would lead to a complete dam failure eventually. I don't see how blowing up other dams, either upstream or downstream would help the problem at Three Gorges. You would want more upstream dams to help slow the water down if possible, not fewer. ---------------------------------- "These things you say we will have, we already have." "That's true. I ain't promising you nothing extra." | |||
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Tinker Sailor Soldier Pie |
I assumed the dams that they blew were not actually on the Yangtze but were dams on distributaries of the Yangtze upstream of the Three Gorges dam. ~Alan Acta Non Verba NRA Life Member (Patron) God, Family, Guns, Country Men will fight and die to protect women... because women protect everything else. ~Andrew Klavan "Once there was only dark. If you ask me, light is winning." ~Rust Cohle | |||
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Partial dichotomy |
I'm guessing the theory is to blow dams in other out-flowing rivers from the upstream body of water, thus lowering the amount of water going to the main dam. | |||
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thin skin can't win |
Not quite that simple. I think you're envisioning a giant bowl of sufficient height all around to contain another foot, 3 feet, whatever, of water. Look at the topography on almost any lake of size and you'll see that's not at all the way they work. If you snapped your fingers and made a damn a couple feet higher you have to look at every single foot of shoreline that is within 2 feet of full pool. If there is one, let alone dozens, of places where that height is 1' higher and you put in another 1.5 feet, you then are flooding additional area behind wherever that is. If it's isolated to one or a few spots suited for another retention method no problem. But if not, you've greatly expanded the area beyond current footprint. Even if you could, the load on the existing dam is now MUCH greater due to the expanded area and the impact on the entire dam structure. You also can't just build a small simple dam to stop that "leak". If you were building to bring up level by one foot that's pressure from that one foot over an enormous area all coming to bear on that spot. I think - I'm a little less certain on the physics of that. Probably actually much less at surface of water than as you progress downward, butit's not zero. Either way, it's dam complicated.This message has been edited. Last edited by: Georgeair, You only have integrity once. - imprezaguy02 | |||
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Member |
https://watchers.news/2020/07/...bs-to-more-than-150/ _________________________ "Sometimes I wonder whether the world is being run by smart people who are putting us on or by imbeciles who really mean it." Mark Twain | |||
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