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China: Heaviest rain in one day in 1000 years

FoundingFathers

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China has similar flooding in 1931.

Exactly how did they calculate the "1,000 year" claim?

 

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DodgebyDave

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wednesday sept 21st 8965 bc was the most rainfall in 2 million years
 

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viking

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China has similar flooding in 1931.

Exactly how did they calculate the "1,000 year" claim?


47F773EE-5665-4C62-8298-4834836F77BA.jpeg
 

TAEZZAR

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Son of Gloin

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Son of Gloin

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engineear

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Moved to Phoenix in 79...in 1980 they had the "500 year flood"... washed out all of the new bridges from Temple to Phoenix. It was taking 3 hours to get into town, people were selling coffee and bear claws in the mornings to all the cars backed up trying to cross the oldest bridge, the Mill Avenue, that was built in the 30's I think.

Flooding all over the place. Underpasses by the freeways were 4 feet high. Golf courses washed away in places. Flash flooding took cars to places they shouldn't go, folks trapped in cars that were foolish enough to try to go through flooded roads...a total mess.

So, have we had another "500 year flood"?...yes in 1981!. The very next year the same thing happened but IIRC other bridges weren't washed away but it was bad.

As I write this it is pouring rain.
 
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ZZZZZ

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Moved to Phoenix in 79...in 1980 they had the "500 year flood"... washed out all of the new bridges from Temple to Phoenix. It was taking 3 hours to get into town, people were selling coffee and bear claws in the mornings to all the cars backed up trying to cross the oldest bridge, the Mill Avenue, that was built in the 30's I think.

Flooding all over the place. Underpasses by the freeways were 4 feet high. Golf courses washed away in places. Flash flooding took cars to places they shouldn't go, folks trapped in cars that were foolish enough to try to go through flooded roads...a total mess.

So, have we had another "500 year flood"?...yes in 1981!. The very next year the same thing happened but IIRC other bridges weren't washed away but it was bad.

As I write this it is pouring rain.
I'm in northern AZ and it rained like crazy last night. It has rained every day for about 10 days now. And the Chicken Little idiot in the local news rag is STILL complaining about the historic drought.
.
.
 

Son of Gloin

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I'm in northern AZ and it rained like crazy last night. It has rained every day for about 10 days now. And the Chicken Little idiot in the local news rag is STILL complaining about the historic drought.
.
.
Gotta stick to the scripted narrative, don’t cha know?
 

WillA2

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EXACTLY what I wuz gunna ask !!!

The calculate the probability of a particular storm based upon measured rainfall data and historical measurement data.

A 0.1% storm is a 1000-year rainfall event.
A 0.5% storm is a 500-year rainfall event.
A 1% storm is a 100- year rainfall event.
A 2% storm is a 50-year rainfall event.
A 10% storm is a 10-year rainfall event.

Sounds to me like a probable storm event was over sensationalized to hide poor planning/engineering especially since people are dieing. The CCP cannot allow blame to fall on them so they obfuscate the truth.
 

Joe King

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A 0.5% storm is a 500-year rainfall event.
Wouldn't that be a 0.2% chance? 0.5% would be a 200 a year event, right? (200 .5's in a hundred)
 

Casey Jones

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And the Chicken Little idiot in the local news rag is STILL complaining about the historic drought.
They have a Narrative.

Fed them by the Nooze Director. Who gets it from whatever government or oligarch feed the station owner or CEO is beholden to.

Amazing, how these jackwaters, who can't conceive the principles of basic meteorology, can tell us we have TEN YEARS to burn our SUVs and air-conditioners, or WE ALL GONNA DIE.
 

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Amazing, how these jackwaters, who can't conceive the principles of basic meteorology, can tell us we have TEN YEARS to burn our SUVs and air-conditioners, or WE ALL GONNA DIE.
I think too many people lose sight of the fact that we are all gonna die.
Don't stress, it is all part of the plan.

BF
 

Rusty Shackelford

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Too many people dont understand the definition of 5vyr 10 yr 100 yr 1000 yr rain events.....maybe time to change the terms for the proles to better comprehend.
 

WillA2

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10-year = 10% probability of happening.
25-year = 4% probability...
50-year = 2% probability...
100-year = 1% probability...
500-year = 0.20% probability...
1000-year = 0.10% probability of happening.

A 1000-year storm event can happen more than once in a short period of time, but the probability of it happening is low. This is how Drainage engineers manage risk when predicting rainfall runoff and design Drainage structures to handle the predicted or probable flow.

I hope this helps.
 

Rusty Shackelford

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You are correct on the probabilities.....now you need to accoint for the volume of rain and the intensity....those are different in various geographical regions. A ten year event in Indiana is not the same as say a ten year event in Arizona.
 

Oldmansmith

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In the 20th century, they basically used 50 years of data to calculate the 100 and 500 year storm events. What could go wrong?
 

WillA2

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You are correct on the probabilities.....now you need to accoint for the volume of rain and the intensity....those are different in various geographical regions. A ten year event in Indiana is not the same as say a ten year event in Arizona.

That's correct. That's why engineers rely on rainfall depth and intensity records for geographical areas. NOAA has very good data for the States of America.

Recent rainfall events or the lack thereof affect the averages that are used to weigh the risk.