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#extreme weather
reasonsforhope · 20 days
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As relentless rains pounded LA, the city’s “sponge” infrastructure helped gather 8.6 billion gallons of water—enough to sustain over 100,000 households for a year.
Earlier this month, the future fell on Los Angeles. A long band of moisture in the sky, known as an atmospheric river, dumped 9 inches of rain on the city over three days—over half of what the city typically gets in a year. It’s the kind of extreme rainfall that’ll get ever more extreme as the planet warms.
The city’s water managers, though, were ready and waiting. Like other urban areas around the world, in recent years LA has been transforming into a “sponge city,” replacing impermeable surfaces, like concrete, with permeable ones, like dirt and plants. It has also built out “spreading grounds,” where water accumulates and soaks into the earth.
With traditional dams and all that newfangled spongy infrastructure, between February 4 and 7 the metropolis captured 8.6 billion gallons of stormwater, enough to provide water to 106,000 households for a year. For the rainy season in total, LA has accumulated 14.7 billion gallons.
Long reliant on snowmelt and river water piped in from afar, LA is on a quest to produce as much water as it can locally. “There's going to be a lot more rain and a lot less snow, which is going to alter the way we capture snowmelt and the aqueduct water,” says Art Castro, manager of watershed management at the Los Angeles Department of Water and Power. “Dams and spreading grounds are the workhorses of local stormwater capture for either flood protection or water supply.”
Centuries of urban-planning dogma dictates using gutters, sewers, and other infrastructure to funnel rainwater out of a metropolis as quickly as possible to prevent flooding. Given the increasingly catastrophic urban flooding seen around the world, though, that clearly isn’t working anymore, so now planners are finding clever ways to capture stormwater, treating it as an asset instead of a liability. “The problem of urban hydrology is caused by a thousand small cuts,” says Michael Kiparsky, director of the Wheeler Water Institute at UC Berkeley. “No one driveway or roof in and of itself causes massive alteration of the hydrologic cycle. But combine millions of them in one area and it does. Maybe we can solve that problem with a thousand Band-Aids.”
Or in this case, sponges. The trick to making a city more absorbent is to add more gardens and other green spaces that allow water to percolate into underlying aquifers—porous subterranean materials that can hold water—which a city can then draw from in times of need. Engineers are also greening up medians and roadside areas to soak up the water that’d normally rush off streets, into sewers, and eventually out to sea...
To exploit all that free water falling from the sky, the LADWP has carved out big patches of brown in the concrete jungle. Stormwater is piped into these spreading grounds and accumulates in dirt basins. That allows it to slowly soak into the underlying aquifer, which acts as a sort of natural underground tank that can hold 28 billion gallons of water.
During a storm, the city is also gathering water in dams, some of which it diverts into the spreading grounds. “After the storm comes by, and it's a bright sunny day, you’ll still see water being released into a channel and diverted into the spreading grounds,” says Castro. That way, water moves from a reservoir where it’s exposed to sunlight and evaporation, into an aquifer where it’s banked safely underground.
On a smaller scale, LADWP has been experimenting with turning parks into mini spreading grounds, diverting stormwater there to soak into subterranean cisterns or chambers. It’s also deploying green spaces along roadways, which have the additional benefit of mitigating flooding in a neighborhood: The less concrete and the more dirt and plants, the more the built environment can soak up stormwater like the actual environment naturally does.
As an added benefit, deploying more of these green spaces, along with urban gardens, improves the mental health of residents. Plants here also “sweat,” cooling the area and beating back the urban heat island effect—the tendency for concrete to absorb solar energy and slowly release it at night. By reducing summer temperatures, you improve the physical health of residents. “The more trees, the more shade, the less heat island effect,” says Castro. “Sometimes when it’s 90 degrees in the middle of summer, it could get up to 110 underneath a bus stop.”
LA’s far from alone in going spongy. Pittsburgh is also deploying more rain gardens, and where they absolutely must have a hard surface—sidewalks, parking lots, etc.—they’re using special concrete bricks that allow water to seep through. And a growing number of municipalities are scrutinizing properties and charging owners fees if they have excessive impermeable surfaces like pavement, thus incentivizing the switch to permeable surfaces like plots of native plants or urban gardens for producing more food locally.
So the old way of stormwater management isn’t just increasingly dangerous and ineffective as the planet warms and storms get more intense—it stands in the way of a more beautiful, less sweltering, more sustainable urban landscape. LA, of all places, is showing the world there’s a better way.
-via Wired, February 19, 2024
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doriandistortion · 7 months
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The past is creeping up my throat
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cardassiangoodreads · 9 months
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You can define this as either which one you consider the overall mostly terrifying, or which one you are the most legitimately anxious about actually happening to you. It's up to you!
Tag where you're from and whether you have any experience with the one you voted the scariest! And feel free to elaborate on if you've moved and if your views have changed over time, etc.
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nemfrog · 9 months
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Tornado in Oklahoma. Die Vereinigten Staaten, das wunder der nationen. 1902.
Internet Archive
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kriegsminister · 8 months
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United States, 1989
A woman poses in front of a tornado (Nebraska)
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Stay safe everyone. 🥶
Tagging: @politicsofcanada @abpoli
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backroad-song · 2 years
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The heat index reached 152 degrees in the Middle East — nearly at the limit for human survival
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As the Northern Hemisphere approaches summer’s peak, heat is testing the limits of human survival in Earth’s hottest spots — and demonstrating the extremes that are increasingly possible and probable against the backdrop of accelerating global warming. In recent days, China set an all-time high of nearly 126 degrees Fahrenheit, while Death Valley hit 128 degrees, two shy of the highest reliably measured temperature on Earth. Phoenix was expected to observe a record-breaking 19th consecutive day at or above 110 degrees Tuesday. And in the Middle East, the heat index reached 152 degrees, nearing — or surpassing — levels thought to be the most intense the human body can withstand. Such conditions are more than enough to overwhelm the body’s ability to regulate its internal temperature, experts said, and offer a glimpse of dangers only expected to become more prevalent as global warming increases extremes in heat and humidity. “We know these extreme temperatures are killing people right now,” said Cascade Tuholske, an assistant professor at Montana State University.
Can the fossil fuel oligarchs who fund the Republican Party FINALLY acknowledge that climate change is real and contributing to more extreme, deadly weather events?
Wealth can only protect one so much from extreme weather events.
Isn't it time for even these greedy people to understand that their continued denial of the problem (and the denial of the Republican politicians they have bought) is contributing to the destruction of life on the planet at a much faster pace than we initially thought?
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politicsofcanada · 2 years
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obsessed with the way my uncle chose to say this, but he is absolutely right. if you live on the east coast, prepare as best you can as fast as you can.
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mindblowingscience · 5 months
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With warmer oceans serving as fuel, Atlantic hurricanes are now more than twice as likely as before to rapidly intensify from wimpy minor hurricanes to powerful and catastrophic, a study said Thursday. Last month Hurricane Lee went from barely a hurricane at 80 mph (129 kph) to the most powerful Category 5 hurricane with 155 mph (249 kph) winds in 24 hours. In 2017, before it devastated Puerto Rico, Hurricane Maria went from a Category 1 storm with 90 mph (145 kph) to a top-of-the-chart whopper with 160 mph (257 kph) winds in just 15 hours. The study looked at 830 Atlantic tropical cyclones since 1971. It found that in the last 20 years, 8.1% of the time storms powered from a Category 1 minor storm to a major hurricane in just 24 hours. That happened only 3.2% of the time from 1971 to 1990, according to a study in the journal Scientific Reports. Category 1 hurricanes top out at 95 mph (153 kph) and a hurricane has to have at least 111 mph (178 kph) winds to become major.
Continue Reading.
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reasonsforhope · 8 months
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AYESHA RASCOE, HOST:
With Spain and Portugal saying that hundreds of people have died from the heat waves sweeping through Europe this month, the longer-term view might come as a surprise. Over the past 50 years, the number of deaths attributed to weather-related disasters has actually fallen. Yes, you heard that right. The World Meteorological Organization says that the number of disasters has increased five times over the past 50 years, but the number of fatalities has fallen by two-thirds. Vox climate writer Umair Irfan has delved into this paradox and joins us now. Welcome to the program, Umair.
UMAIR IRFAN: Thanks for having me, Ayesha.
RASCOE: So how can this be? Like, how can the number of deaths be falling even though we hear the news, we see the disasters? You know, seas are rising, summers are hotter, hurricanes seem to be getting stronger. So how is it possible that deaths can be down?
IRFAN: Well, there are two main factors here. One is better forecasting - basically being able to get ahead of these disasters and then hopefully being able to get people out of harm's way. So that's really prominent with things like hurricanes and heat waves. We can actually see those things days in advance. The other side of the equation is how well we can cope with things like storms, fires and heat waves when they do occur. So we have better tools - things like sea walls. We have better building codes. We have firefighting teams that can get people out of fire zones. And so between those two aspects - you know, the better forecasting and the better tools - we've been able to avert a lot of deaths, even though the global population has grown about fourfold since the start of the 20th century.
RASCOE: Are the technological advances that you're talking about available even in less-developed areas?
IRFAN: It's not, unfortunately. And you're hitting on a very important point. You know, the WMO pointed out that about 90% of disaster-related fatalities that occur today are occurring in developing countries. And there's a huge gap in terms of being able to anticipate these disasters before they occur and being able to respond to them and being able to rebuild in their aftermath. And that really is a big shortfall that a lot of world leaders are starting to get concerned about...
You know, the World Meteorological Organization, they launched this initiative to basically say that they want the whole world covered by disaster early warning systems over the next five years. And they think that this is something that's going to be taking a big bite out of the fatalities and the casualties caused by these disasters. So I think it's worth highlighting the progress that's made, but also the progress that we still need to make.
-via NPR, July 17, 2022
Thanks so much to @gardening-tea-lesbian for the link!
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wronghands1 · 3 months
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solarpunkcitizen · 2 years
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First an epic ice storm. Now temperatures so mild that a daffodil is already blooming in my front yard. Wowza.
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stealth-science · 8 months
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There was a nice looking tornado on the north side of town today.
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Impassable winter roads are delaying vital shipments and threatening the safety of First Nations across northern Ontario, leaders warned as they pressed the provincial and federal government for support. An unseasonably warm winter, intensified by human-caused climate change, has left many remote First Nations cut off from an essential road network built over frozen land, lakes and rivers. The situation has prompted recent state of emergency declarations by First Nations in Manitoba and Ontario, as well as repeated requests for support. “It’s becoming more and more dire, and more challenging,” said Grand Chief Alvin Fiddler of the Nishnawbe Aski Nation, an organization of First Nations across northern Ontario.
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Tagging @politicsofcanada
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