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Farms In The USA Affected Due To Rise In Ocean And Salinity Levels

Farming the land may not be the best option. Another choice is to give in to nature and turn fields into wetlands.

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ocean, water, farms
Dr. Jessica Ball of USGS, a geologist and volcanologist who does research at the US Geological Survey, is updating Hawaiian Volcano Observatory scientists on the ground during a helicopter overflight of the ocean entry of the fissure 8 lava flow where a laze (lava haze) plume is visible over the active parts of the flow margin near Kapoho, Hawaii, June 8, 2018. VOA

The fields grow shoulder-high with weeds out the window of Bob Fitzgerald’s Ford pickup. The drive through Fitzgerald’s neighborhood in Princess Anne, Maryland, is a tour of dying forests and abandoned cropland.

“A few years ago, all of this was a good farm,” he said. “And it’s gone, as a farm.”

The land along the shores of the Chesapeake Bay has been sinking for centuries. But climate change is adding a second whammy. As the sea level rises, salt water is seeping into the water table, deeper and deeper inland. The ground is becoming too salty for crops to grow.

Maryland’s Eastern Shore is home to some of the oldest farms in America. Fitzgerald’s dates back to 1666. He’s seen big changes in his lifetime.

“You just can’t believe how it’s taking things over in the last 15 or 20 years,” Fitzgerald said. “I can show you land around here that people raised tomatoes on when I was a little boy. And now it’s gone.”

Around the world, scientists warn that coastal farms are under threat from rising seas and encroaching salt water. A World Bank report estimates rice yields in coastal areas of Bangladesh may fall by more than 15 percent by 2050. Another report found that hundreds of millions of people will likely be displaced by rising waters.

Kate Tully aims to help keep Eastern Shore farmers in business as the seas rise.

The University of Maryland agroecologist had seen the “ghost forests” of dying pine trees killed by the increasingly salty soil. When she started looking at maps, she said, “I realized that a lot of the land that was upslope wasn’t just forests, it was farms. And so I started poking around and talking to people and asking if this was an issue on farms.”

It was. But “a lot of people hadn’t really been talking about it” outside their own communities, she said.

With a new $1.1 million research grant from the U.S. Department of Agriculture, Tully and her colleagues are aiming to give farmers options.

water, farm
Farmer Joe Layton Jr., of Vienna, stands in a field of recently planted soybean crop Wednesday, June 11, 2003. In front soybeans begin to sprout up but because of the wet weather, many seeds rotted in the soil and did not sprout. VOA

Test plots scattered around the Eastern Shore are trying out different crops.

“One thing that I’m very pleasantly surprised about is how well the sorghum does,” Tully said. The grain crop may be a good choice to feed the roughly 600 million chickens raised in the region each year. It’s a hardy crop that can handle salt, drought and heavy rains.

Tully’s group is also testing barley to supply the growing microbrew industry; the oilseed canola; switchgrass, a possible biofuel crop; and salt-tolerant soybeans.

Just being able to grow a crop isn’t enough, though. It also has to be profitable. An economist on the team will be running the numbers.

“I never want to recommend something that would make farmers go out of business,” Tully said.

But farming the land may not be the best option. Another choice is to give in to nature and turn fields into wetlands.

Farms in countryside
Farm in countryside, Pixabay

Wetlands attract waterfowl. Waterfowl attract hunters.

“There’s money in duck hunting,” Tully said. Hunting clubs will pay farmers for exclusive access to wetlands on their property. “It can be a lucrative pathway.”

Also Read:  Whale Art To Raise Awareness About Ocean Pollution

Tully and her colleagues are just getting started. It will be a few years before they have recommendations for what will sustain communities that have been farming this land for centuries.

“There’s a lot of history there. And as these seas rise, some of that history is going underwater,” Tully said. “And I find that to be a pretty moving, pretty motivating reason to try to figure out what we can do for these farmers.” (VOA)

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New Technology That Can Clean Water Twice As of Now

more than one in 10 people in the world lack basic drinking water access, and by 2025, half of the world's population will be living in water-stressed areas.

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water
Novel technology cleans water using bacteria

Researchers, led by one of Indian-origin, have developed a new technology that can clean water twice as fast as commercially available ultrafiltration membranes, an advance that brings hope for countries like India where clean drinking water is a big issue.

According to a team from the Washington University in St. Louis, more than one in 10 people in the world lack basic drinking water access, and by 2025, half of the world’s population will be living in water-stressed areas.

The team led by Srikanth Singamaneni, Professor at the varsity, developed an ultrafiltration membrane using graphene oxide and bacterial nanocellulose that they found to be highly efficient, long-lasting and environment-friendly.

The membrane technology purifies water while preventing biofouling, or build up of bacteria and other harmful micro-organisms that reduce the flow of water.

Water
The membrane technology purifies water while preventing biofouling. VOA

For the study, published in the journal Environmental Science and Technology, they used bacteria to build such filtering membranes.

The Gluconacetobacter hansenii bacteria is a sugary substance that forms cellulose nanofibres when in water.

The team then incorporated graphene oxide (GO) flakes into the bacterial nanocellulose while it was growing, essentially trapping GO in the membrane to make it stable and durable.

They exposed the membrane to E. coli bacteria, then shone light on the membrane’s surface.

After being irradiated with light for just three minutes, the E. coli bacteria died. The team determined that the membrane quickly heated to above the 70 degrees Celsius required to deteriorate the cell walls of E. coli bacteria.

While the bacteria are killed, the researchers had a pristine membrane with a high quality of nanocellulose fibres that was able to filter water twice as fast as commercially available ultrafiltration membranes under a high operating pressure.

When they did the same experiment on a membrane made from bacterial nanocellulose without the reduced GO, the E. coli bacteria stayed alive.

The new technology is capable of identifying and quantifying different kinds of cyanobacteria, or blue-green algae, as a threat to shut down water systems when it suddenly proliferates. Pixabay

While the researchers acknowledge that implementing this process in conventional reverse osmosis systems is taxing, they propose a spiral-wound module system, similar to a roll of towels.
Also Read: India Gets Assistance of Rs 3,420 Crore From Japan
It could be equipped with LEDs or a type of nanogenerator that harnesses mechanical energy from the fluid flow to produce light and heat, which would reduce the overall cost.

If the technique were to be scaled up to a large size, it could benefit many developing countries where clean water is scarce, the researchers noted. (IANS)