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Tokyo Preparing For Floods 'Beyond Anything We've Seen' (tampabay.com)
In the face of an era of extreme weather brought on by climate change, global cities are working to improve their defenses. The New York Times reports (Warning: may be paywalled; alternative source) of Tokyo's $2 billion underground anti-flood system that consists of tunnels that divert water away from the region's most vulnerable floodplains. The city is "preparing for flooding beyond anything we've seen," says Kuniharu Abe, head of the underground site. From the report: But even in Tokyo, the onset of more frequent and intense storms has forced officials to question whether the region's protections are strong enough, a concern that has become more urgent as the city prepares to host the 2020 Olympic Games. Across Japan, rainfall measuring more than 2 inches an hour has increased 30 percent over the past three decades, the Japan Meteorological Agency estimates. The frequency of rainfall of more than 3 inches an hour has jumped 70 percent. The agency attributes the increase of these intense rains to global warming, heralding a new era in a country that is among the world's wettest, with a language that has dozens of words for rain. [...]
Experts have also questioned the wisdom of erecting more concrete defenses in a country that has dammed most of its major river systems and fortified entire shorelines with breakwaters and concrete blocks. Some of these protections, they say, only encourage development in regions that could still be vulnerable to future flooding. In eastern Saitama, where the Kasukabe facility has done the most to reduce floods, local industry has flourished; the region has successfully attracted several large e-commerce distribution centers and a new shopping mall. Still, the Kasukabe operation remains a critical part of Tokyo's defenses, say officials at Japan's Land Ministry, which runs the site. Five vertical, underground cisterns, almost 250 feet deep, take in stormwater from four rivers north of Tokyo. A series of tunnels connect the cisterns to a vast tank, larger than a soccer field, with ceilings held up by 60-foot pillars that give the space a temple-like feel. From that tank, industrial pumps discharge the floodwater at a controlled pace into the Edo river, a larger river system that flushes the water into Tokyo Bay.
Experts have also questioned the wisdom of erecting more concrete defenses in a country that has dammed most of its major river systems and fortified entire shorelines with breakwaters and concrete blocks. Some of these protections, they say, only encourage development in regions that could still be vulnerable to future flooding. In eastern Saitama, where the Kasukabe facility has done the most to reduce floods, local industry has flourished; the region has successfully attracted several large e-commerce distribution centers and a new shopping mall. Still, the Kasukabe operation remains a critical part of Tokyo's defenses, say officials at Japan's Land Ministry, which runs the site. Five vertical, underground cisterns, almost 250 feet deep, take in stormwater from four rivers north of Tokyo. A series of tunnels connect the cisterns to a vast tank, larger than a soccer field, with ceilings held up by 60-foot pillars that give the space a temple-like feel. From that tank, industrial pumps discharge the floodwater at a controlled pace into the Edo river, a larger river system that flushes the water into Tokyo Bay.
30 years ago whenever the monsoon struck or if there was a flood, number of dead were in the hundreds, sometimes, thousands
Today's China, the death have fallen drastically due to a lot of extra-ordinary water channeling projects China has undertaken
I'm amazed about the willingness of people to believe fake news such as global warming. Scientists have yet to present credible evidence that humans are causing global warming. The propagandists continue to promote their message that humans are responsible, but without hard evidence, we shouldn't believe that humans are causing the Earth to get warmer. There may well be legitimate reasons to prepare for possible dosasters, especially in an area that experiences powerful typhoons. But that isn't a reason to invoke the myth that humans are causing global warming.
Just because you're too stupid to recognize credible evidence about global warming doesn't mean that there isn't any. I'll start believing that global warming is fake news once people like you start producing credible evidence that the warming is natural.
Another nation that will suffer from the Chinese global warming hoax. Too bad for them, but GREAT for us. They'll spend money on useless stuff while we forge ahead.
When I was a child, my family lived in the Tokyo area for a while. The first couple of years we were there, we lived in a suburban area that was pretty crowded, albeit with mostly low-rise residential and commercial properties.
Our rental house sat about halfway up a fairly steep hill, at the bottom of which was an open-air market crowded with noodle vendors and the like. When I was five, there was a pretty intense typhoon. As I recall, it rained continuously for three days - and I mean it just bucketed down to the point where it was difficult to see the houses across the one-and-a-half-lane street.
The fourth day was clear, bright, and almost cloudless, so I finally got to go outside again. I wanted to visit the marketplace, but I couldn't, because the bottom of the hill was submerged under about 10 feet of water.
So, local severe flooding is nothing new for Japan - although I have no doubt it's getting worse - and addressing it via infrastructure improvements is certainly non-trivial in a nation whose population is almost entirely urban nowadays.
(BTW - I also experienced my first major earthquake in that house. It had to have been at least a 6.5, because it lasted at least half a minute. But that's a story for another time ... )
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