one of the funniest conversations I ever had with my ex was when they were still getting used to Celsius and asked me "what's 20 degrees?" and instead of converting it, I said "it's the highest your dad will ever let you set the thermostat and when you say you're cold he tells you to put on another sweater, we're not made of money" and they went "oh, 68"
the fact that this reference was that fucking precise was something they went on to tell people about for years.
As relentless rains pounded LA, the city’s “sponge” infrastructure helped gather 8.6 billion gallons of water—enough to sustain over 100,000
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.
The infrastructure to make the county more "spongy" is also used in the dry season to remediate contaminated groundwater and to return recycled water to the aquifers.
There have also been some pilot projects to make flood-prone neighborhoods more spongy on a small scale by distributing water barrels (to hold more water out of the storm drain system) and regrading the edges of roads in areas without sidewalks to allow for greater ground infiltration. I've been studying this for a while because we had to deal with a grading problem that caused a lot of water to build up against our foundation (thankfully poured concrete rather than a raised foundation, but it's still not great). There's a lot of small scale ways to reduce runoff that contribute to the overall sponginess while improving quality of life in other ways.
Making the average yard (at least in the Midwest) more capable of holding water is so easy that it's nuts that more people don't do it. Every bit you put back into the soil instead of letting run off mitigates flooding and stores water in the ground for dry periods.
The mantra for rainwater management is slow it down, spread it out, soak it in. Water soaks into the ground more easily when it moves slowly, so plant every bit of soil you can. You can force water to move over stones or other obstacles to slow it down as well. If you can spread the water over a larger area, it will naturally move more slowly, also soaking in more easily.
Rain gardens are just shallow depressions, usually 6" to 12" deep at most, designed to to hold water for 24 or 48 hours until it soaks into the ground. All you need is a shovel and plants native to your area that have deep roots.
I made a rain garden in my front yard that takes the discharge from my sump pump as well as a gutter. Even in a big storm, I have no runoff from that side of the yard. I have been know to take videos of my rain garden in a storm and send them to my gardening friends. Check out the rainscaping page at Missouri Botanical Garden for more methods of managing rainwater.
I can't believe we live in a world where there's an AI company unironically called "Palantir," and it isn't a parody. It's a real thing. I remember seeing a picture of an advertisement on here and thinking, "This HAS to be a joke. This is too on-the-nose to be real. They wouldn't honestly name an AI company Palantir, after the Seeing Stones from Lord of the Rings that are supposed to offer knowledge, but famously also might be feeding you misinformation from evil sources because 'we do not know who else may be watching.'" But then here I am listening to the BBC News discussing why the CEO of Palantir just published a Manifesto that sounds like it was written by a supervillain.
I don't read as much fic as I used to but one "tell" for non Canadians writing us, besides the etransfer, is the units you use to describe us measuring something. I hate to tell you this but The Chart is real and it's completely subconscious. Please abide
Hehe as a Canadian writing Star Wars fic, you might think I have it easy remembering to put everything in metric but as you can see... you would be mistaken. 😅
I don't read as much fic as I used to but one "tell" for non Canadians writing us, besides the etransfer, is the units you use to describe us measuring something. I hate to tell you this but The Chart is real and it's completely subconscious. Please abide
Hehe as a Canadian writing Star Wars fic, you might think I have it easy remembering to put everything in metric but as you can see... you would be mistaken. 😅
Fantastic article!! The guys looking for it were fish researchers who saw it one time, knew instantly it was an undescribed species, and then tried for nearly 20 years to find and document it!
It's a type of ghost pipefish, related to seahorses, and it floats around coral reefs looking like a piece of algae and hunting unsuspecting prey
They are, of course, named after Snuffleufagus from Sesame Street!
Later on it the project, they got citizen science involved, and people across the Pacific started reporting sightings of snuffy fish from all over!
Hooray for science and hooray for S. snuffleufagus !
alright I've got to do some quick math to explain attitudes towards AI to my boss.
we're looking to create an AI policy, and when we were talking about this, my boss (older millennial) was genuinely shocked to hear that younger people do not (seem) to view AI positively (a la the recent commencement speakers being booed)
please rb for larger sample size!
Question 1/3
What is your age, and do you feel AI is a net positive or net negative in our lives today?
prguitarman
origamiaround
annaxmalina
ellievsbear
2087
romaincrisis
