tidalpunk

[tidalpunk]

"Scientists in Singapore have broken a long-standing limitation on the ability to generate electricity from flowing water, suggesting that another elemental force of nature could be leveraged for renewable electricity: rain.

With the simplest and smallest scale test setup, the team could power around 12 LED lightbulbs with simulated rain droplets flowing through a tube, but at scale, their method could generate meaningful amounts that could rival rooftop solar arrays.

Singapore experiences significant rainfall throughout the year, averaging 101 inches (2581 millimeters) of precipitation annually. The idea of generating electricity from such falling water is attractive, but the method has long been constrained by a principle called the Debye Length.

Nevertheless, the concept is possible because of a simple physical principle that charged entities on the surface of materials get nudged when they rub together—as true for water droplets as it is for a balloon rubbed against the hair on one’s head.

While this is true, the power values thus generated have been negligible, and electricity from flowing water has been limited to the driving of turbines in hydropower plants.

However, in a study published in the journal ACS Central Science, a team of physicists has found a way to break through the constraints of water’s Debye Length, and generate power from simulated rain.

“Water that falls through a vertical tube generates a substantial amount of electricity by using a specific pattern of water flow: plug flow,” says Siowling Soh, author of the study. “This plug flow pattern could allow rain energy to be harvested for generating clean and renewable electricity.”

The authors write in their study that in existing tests of the power production from water flows, pumps are always used to drive liquid through the small channels. But the pumps require so much energy to run that outputs are limited to miniscule amounts.

Instead, their setup to harness this plug flow pattern was scandalously simple. No moving parts or mechanisms of any kind were required. A simple plastic tube just 2 millimeters in diameter; a large plastic bottle; a small metallic needle. Water coming out of the bottle ran along the needle and bumped into the top section of the tube that had been cut in half, interrupting the water flow and allowing pockets of air to slide down the tube along with the water.

The air was the key to breaking through the limits set by the Debye Length, and key to the feasibility of electricity generation from water. Wires placed at the top of the tube and in the cup harvested the electricity.

The total generation rate of greater than 10% resulted in about 100 watts per square meter of tube. For context, a 100-watt solar panel can power an appliance as large as a blender or ceiling fan, charge a laptop, provide for several light bulbs, or even a Wi-Fi router.

Because the droplet speeds tested were much slower than rain, the researchers suggest that the real thing would provide even more than their tests, which were of course on a microscale."

-via Good News Network, April 30, 2025

[tidalpunk]

Rice University researchers have developed an innovative solution to a pressing environmental challenge: removing and destroying per- and polyfluoroalkyl substances (PFAS), commonly called "forever chemicals." A study led by James Tour, the T.T. and W.F. Chao Professor of Chemistry and professor of materials science and nanoengineering, and graduate student Phelecia Scotland unveils a method that not only eliminates PFAS from water systems but also transforms waste into high-value graphene, offering a cost-effective and sustainable approach to environmental remediation. This research was published March 31 in Nature Water.

Continue Reading.

[tidalpunk]

From the article:

“The act of restoring and maintaining naulas has also rekindled long-lost community interest in sustainable construction and water harvesting practices.” People see firsthand how keeping the catchment area clean, taking care of local broadleaf forests and digging contour trenches can fill their naulas and keep them water secure,” he says. Other Himalayan states like Jammu and Kashmir, Assam and Arunachal Pradesh have also shown an interest in reviving their traditional water harvesting structures. Reviving springs has the potential to transform more than just the lives of Himalayan communities for whom springs are an important source of drinking water: Reports suggest that these springs contribute substantially to the base flow of large Himalayan rivers, and reviving them could, in the long term, improve the hydrology of the densely populated river basins of the Ganges, Brahmaputra and Yamuna. 

[tidalpunk]

Newlyn, Cornwall. February 2023.

[tidalpunk]

"Morningside Park, a beloved neighborhood park in Miami with sweeping views of Biscayne Bay, will soon pilot an innovative approach to coastal resilience.

BIOCAP tiles, a 3D-printed modular system designed to support marine life and reduce wave impact along urban seawalls, will be installed on the existing seawall there in spring 2025. BIOCAP stands for Biodiversity Improvement by Optimizing Coastal Adaptation and Performance.

Developed by our team of architects and marine biologists at Florida International University, the uniquely textured prototype tiles are designed to test a new approach for helping cities such as Miami adapt to rising sea levels while simultaneously restoring ecological balance along their shorelines...

Ecological costs of traditional seawalls

Seawalls have long served as a primary defense against coastal erosion and storm surges. Typically constructed of concrete and ranging from 6 to 10 feet in height, they are built along shorelines to block waves from eroding the land and flooding nearby urban areas.

However, they often come at an ecological cost. Seawalls disrupt natural shoreline dynamics and can wipe out the complex habitat zones that marine life relies on.

Marine organisms are crucial in maintaining coastal water quality by filtering excess nutrients, pollutants and suspended particles. A single adult oyster can filter 20-50 gallons of water daily, removing nitrogen, phosphorus and solids that would otherwise fuel harmful algal blooms. These blooms deplete oxygen levels and damage marine ecosystems.

Filter-feeding organisms also reduce turbidity, which is the cloudiness of water caused by suspended sediment and particles. Less water turbidity means more light can penetrate, which benefits seagrasses that require sunlight for photosynthesis. These seagrasses convert carbon dioxide into oxygen and energy-rich sugars while providing essential food and habitat for diverse marine species.

Swirling shapes, shaded grooves

Unlike the flat, lifeless surfaces of typical concrete seawalls, each BIOCAP tile is designed with shaded grooves, crevices and small, water-holding pockets. These textured features mimic natural shoreline conditions and create tiny homes for barnacles, oysters, sponges and other marine organisms that filter and improve water quality.

The tile’s swirling surface patterns increase the overall surface area, offering more space for colonization. The shaded recesses are intended to help regulate temperature by providing cooler, more stable microenvironments. This thermal buffering can support marine life in the face of rising water temperatures and more frequent heat events driven by climate change.

Another potential benefit of the tiles is reducing the impact of waves.

When waves hit a natural shoreline, their energy is gradually absorbed by irregular surfaces, tide pools and vegetation. In contrast, when waves strike vertical concrete seawalls, the energy is reflected back into the water rather than absorbed. This wave reflection – the bouncing back of wave energy – can amplify wave action, increase erosion at the base of the wall and create more hazardous conditions during storms.

The textured surfaces of the BIOCAP tiles are designed to help diffuse wave energy by mimicking the natural dissipation found on undisturbed shorelines.

The design of BIOCAP takes cues from nature. The tile shapes are based on how water interacts with different surfaces at high tide and low tide. Concave tiles, which curve inward, and convex tiles, which curve outward, are installed at different levels along the seawall. The goal is to deflect waves away from the seawall, reduce direct impact and help minimize erosion and turbulence around the wall’s foundation.A

How we will measure success

After the BIOCAP tiles are installed, we plan to assess how the seawall redesign enhances biodiversity, improves water quality and reduces wave energy. This two-year pilot phase will help assess the long-term value of ecologically designed infrastructure.

To evaluate biodiversity, we will use underwater cameras to capture time-lapse imagery of the marine life that colonizes the tile surfaces. These observations will aid in documenting species diversity and habitat use over time...

In the coming year, we’ll be watching with hope as the new BIOCAP tiles begin to welcome marine life, offering a glimpse into how nature might reclaim and thrive along our urban shorelines.

[tidalpunk]

"From Northern India comes the story of an entrepreneur’s efforts to clean up a historically-beautiful lakefront by turning an infestation of weeds into rich natural fertilizer.

Being something along the lines of the Lake Como of India, Dal Lake in the nation’s northerly city of Srinagar is surrounded by palaces, temples, fog-cloaked forested hills, and is iconic in the country for its houseboat culture.

Pictured: View of an island in Dal Lake, Srinagar

Yet for all its natural and historic beauty, Dal Lake was sick—sick with lake weeds.

“These aquatic plants had accumulated near Dal Lake over the years, creating an unsightly mess and posing a threat to the local ecosystem,” Maninder Singh tells The Better India.

Singh is the founder of Clean ‘Effen’ Tech (CET), a local-government partner company that harvests thousands of tons of those lake weeds every year, dries and enriches them, then grinds them into fertilizer to sell to local farmers.

Maninder was first inspired to find a solution for clearing the lake weed when visiting Indian-administered Kashmir for his first wedding anniversary. Having already launched an IT startup in his native Uttar Pradesh, Singh would eventually change his focus to creating a social enterprise to tackle the challenges of our age.

The sight of the lake weed marring Dal Lake’s beauty immediately came into his head, and he began an 8-year process to construct a value chain that would see the lake, the local ecology, the global ecology, the local economy, and his own economy, all flourish together.

“Our project is designed to process up to 70,000 [metric] tonnes of lake weed each year, which yields between 20,000 to 22,000 tonnes of organic manure. This large-scale effort is expected to lead to an annual reduction of around 50,000 tonnes of CO2 emissions,” Singh tells The Better India.

“We have made an impact by enriching over 4,400 acres of land, improving soil health, and supporting sustainable agriculture practices.”

Local workers harvest the lake weed using large machines and transport it to CET’s production plant. There the lake water is drained and treated for heavy metals and other pollutants before it’s released.

The lake weed is dried, shredded, enriched, and pulverized before being sold for 25% less than chemical fertilizers imported from other states like UP and Haryana, saving more emissions from transportation.

Local farmers have benefited from the cost savings and from the lack of soil amending. Harvests are up, as are soil nutrient concentrations. Also in an economic sense, the local tourism industry will no doubt benefit from the 14,800 metric tons of lake weed pulled in by Singh’s partners last year, not least because during the hotter summer months the mounds of weeds decay and putrefy the air.

Looking to the future, Singh aims to replicate this success in other Indian lakes—starting in the states of Odisha and Rajasthan. Anywhere there’s a beautiful fresh water body overrun with aquatic plants, Singh hopes to see some Clean ‘Effen’ Tech brought in to clean it the eff up."

-via Good News Network, April 23, 2025

[tidalpunk]

EVERYONE SHUT THE FUCK UP SCIENTISTS AT THE SCHMIDT OCEAN INSTITUTE HAVE FOOTAGE OF A LIVE COLOSSAL SQUID FOR THE FIRST TIME EVER !!!!!!!!!!!!!!!!!!!

🦑‼️🦑‼️🦑‼️🦑‼️🦑‼️🦑

[tidalpunk]

I'm giving a talk this week about using my Adventure Cartoonist powers for evil good by learning everything I possibly can about kelp farming over the last few months. Join me Wednesday, April 9th at 9am Pacific for a talk on Illustrating Aquaculture! Whether you're a science communicator, a visual artist looking for to expand your job opportunities, or just wanna hear about AQUATIC MYSTERIES, there will be something for you.

[tidalpunk]

Imitation caviar invented in the 1930s could provide the solution to plastic pollution, claims Pierre Paslier, CEO of London-based packaging company Notpla. He discovered the cheap food alternative, invented by Unilever and made using seaweed, after quitting his job as a packaging engineer at L’Oréal.

With cofounder and co-CEO Rodrigo García González, Paslier and Notpla have extended the idea, taking a protein made from seaweed and creating packaging for soft drinks, fast food, laundry detergent, and cosmetics, among other things. They’re also branching out into cutlery and paper.

“Seaweed grows quickly and needs no fresh water, land, or fertilizer,” Paslier explains. “It captures carbon and makes the surrounding waters less acidic. Some species of seaweed can grow up to a meter a day.” Best of all, he says, packaging made from seaweed is completely biodegradable because it’s entirely nature-based.

Paslier noted an amazing coincidence—Alexander Parkes invented the first plastic in Hackney Wick, the same part of East London that, 100 years later, Notpla calls home. Since Parkes’ first invention, waste plastic—especially tiny particles known as microplastics, which take hundreds or thousands of years to break down into harmless molecules—has been wreaking havoc in ecosystems across the world.

Plastic pollution is proving especially damaging in the marine environment, where tiny beads of plastic are deadly to the vital microorganisms that make up plankton and which sequester 30 percent of our carbon emissions, “without us having to build any new fancy technologies,” Paslier says.

Notpla’s plans to replace plastic began with a drink container for marathons. This is, in effect, a very large piece of fake caviar—a small pouch that contains juice or water that athletes can pop in their mouths and swallow when they need rehydration. “We wanted to create something that would feel more like fruit; packaging that you could feel comes more from picking something from a tree than off a production line,” he says.

Paslier showed pictures of two postrace streets—one where refueling came in plastic containers and one where it came in edible Notpla. The first was littered with plastic bottles; the second completely waste-free.

The next step was takeout food containers. Even containers we think are cardboard contain plastic, he says, as grease from food would make plain cardboard too soggy. Working with delivery company Just Eat, Notpla has pioneered a replacement for the per- and polyfluorinated substances (PFAS), the so-called ���forever chemical” plastics that currently line cardboard takeout containers. It has even found a way to retrofit its solution into the old PFAS plant, so there was no need to build new factories.

The company is developing soluble sachets for detergent pods, ice-cream scoops, and even paper packing for cosmetics. And there’s plenty of seaweed to experiment with, Paslier points out. “You don’t realize it’s already available massively at scale,” he says. “It’s in our toothpaste, it’s in our beer, it’s in our reduced-fat products—so there’s an existing infrastructure that we can work with without having to build any additional processes.”

[tidalpunk]

"The Swimmer" Short animation thing I made a while ago.

I am noticing that a lot of my work has water in it in some form.

[tidalpunk]

WHAT IS A RAIN GARDEN?

A rain garden is a shallow planted depression designed to hold water until it soaks into the soil. A key feature of eco-friendly landscape design, rain gardens—also known as bio-infiltration basins—are gaining credibility and converts as an important solution to stormwater runoff and pollution. Here we’ll show you how to make a rain garden fit handsomely into a landscape and still fulfill all of its environmental functions.

Refer to the list of links below to guide you through calculating garden depth, garden size, placement, and plant selection.

University of Nebraska NebGuide 1 – Rain Garden Design for Homeowners

University of Nebraska NebGuide 2 – Plant Selection for Rain Gardens in Nebraska

University of Nebraska NebGuide 3 – Installing Rain Gardens in Your Yard

Backyard Farmer Video – Rain Gardens and Rain Barrels

Minnesota’s Rain Garden Workbook for Homeowners

[tidalpunk]

Okay, this is pretty incredible. A 3D artist, consulting scholars and archaeologists, worked for a year and a half in Blender to create a reconstruction of pre-Columbian Tenochtitlán, complete with the surrounding landscape. It’s staggeringly beautiful, and—at least to me���gives a wonderful impression of the city as a place where people worked and lived and worshiped

[tidalpunk]

Pašman, Otok Pašman, Croatia - August 2023

[tidalpunk]

beaded sardine earrings ✨ made with vintage & salvaged beads hand stitched on felt 🐟 these have sold but i have more beadwork & sardines available in my shop ❤️

etsy

[tidalpunk]

Chel snakehead (also known as Channa amphibious)

​A rare fish species thought to be extinct for 85 tears was just rediscovered in India. The last sighting of the Chel snakehead (also known as Channa amphibious) was recorded from specimens collected between 1918 and 1933 in the Himalayan region of India, leading scientists to believe the species had died out. “Commonly known as the Chel Snakehead, this large and vibrant species is distinguished by chrome-yellow to orange stripes, a bright neon patch beneath the eye, and the highest number of lateral-line scales among all snakeheads of the Gachua group,” says Thackeray Wildlife Foundation.

[tidalpunk]

"In a degraded and semi-arid farming area in India, simple science-driven changes to the landscape have colored the horizon, and a village’s fortunes, with green.

In the Latur district in the central western state of Maharashtra, 40 years of erratic rainfall, groundwater depletion, soil erosion, and crop failures have impoverished the local people.

In the village of Matephal, the International Crops Research Institute for the Semi-Arid Tropics (ICRISAT) launched a project in 2023 that aimed at addressing these challenges through integrated landscape management and climate-smart farming practices. [Note: Meaning they've achieved this much in just two years!]

Multiple forms of data collection allowed ICRISAT to target precise strategies for each challenge facing the 2,000 or so people in Matephal.

Key interventions focused on three critical areas: water conservation, land enhancement with crop diversification, and soil health improvement. Rainwater harvesting structures recharged groundwater around 1,200 acres, raising water tables by 12 feet and securing reliable irrigation. Farm ponds provided supplemental irrigation, while embanking across 320 acres reduced soil erosion.

Farmers diversified their crops, converting 120 or so acres of previously fallow land into productive farmland with legumes, millets, and vegetables. Horticulture-linked markets for fruits and flowers improved income stability.

Weather monitoring equipment was also installed that actively informed sustainable irrigation practices.

“It is a prime example of how data-driven approaches can address complex agricultural challenges, ensuring interventions are precise and impactful. Matephal village is a model for other semi-arid regions in India and beyond,” said Dr. Stanford Blade, Director General-Interim at ICRISAT.

Farmers actively participated in planning and decision-making, fostering long-term commitment.

“This ICRISAT project improved yields, diversified crops, and boosted incomes. It also spared women from walking over a kilometer for drinking water, now available in the village for people and animals,” said Mr. Govind Hinge of Matephal village.

Looking ahead, ICRISAT writes it wants to use Matephal as a case study to scale these methods across India’s vast and drier average. As Matephal’s fields flourish, the village is a testament to the power of collaboration and science in transforming lives and landscapes."

-Article via Good News Network, March 3, 2025. Video via International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), February 26, 2025

[tidalpunk]

Shell. Chair. Shair if you will.