Tag: geology

Mapping Underground Rivers

  • DNR hydrologist Jeff Green consults a high-resolution topographic map to figure out which sinkhole is ahead of him. The trees and grass that grow up around the sinkhole form a buffer, allowing water to soak into the soil and filtering any pollutants before it reaches the aquifer.(Photo courtesy of Stephanie Hemphill)

Spring in the north is a time of melting snow and running water. It’s the best time of year for people who study underground water flows. Those underground rivers are important, especially where surface water easily drains into bedrock. It can quickly carry pollution long distances. Hydrologists try to map these underground rivers to help protect fragile ecosystems. As Stephanie Hemphill reports, the first step in making these maps is a process called dye tracing.

Transcript

Spring in the north is a time of melting snow and running water. It’s the best time of year for people who study underground water flows. Those underground rivers are important, especially where surface water easily drains into bedrock. It can quickly carry pollution long distances. Hydrologists try to map these underground rivers to help protect fragile ecosystems. As Stephanie Hemphill reports, the first step in making these maps is a process called dye tracing.

When the snow is melting in the woods and fields, Jeff Green wants to know where it’s going.

“We’re going to hike back to two springs.”

Green is a hydrologist with the Minnesota Department of Natural Resources, and an expert in the limestone geology of Southeast Minnesota.

Green climbs a fence and splashes through a stream that’s flooding a pasture. The stream is bordered by a natural wall of limestone.

Melting snow seeps into the limestone. It runs down vertical cracks to bigger horizontal openings that look like miniature caves. Jeff Green calls these “conduits,” and some are three inches wide.

“You can imagine a pipe that big — water would move very fast, like we’re seeing. So these conduits are what we’re dye tracing.”

Green has traipsed out to this pasture to put what he calls a “bug” in a spring. The ‘bug’ is a small mesh bag about the size of a cellphone, packed with charcoal. The charcoal will capture a dye that he’ll pour into melting snow in a sinkhole a few miles away. He’ll do this in several different spots.

By tracing the paths of different colors of dye, he’ll learn the sources of the water that feeds each spring. That will help him make what he calls a springshed map.

We slog across a corn field that’s dotted with small groves of trees. They’re growing around miniature canyons, about 20 feet deep. Here, you can see how this honeycombed water highway works, and this is where Jeff Green will pour the first dye.

“This is a place where there was a conduit, an opening in the limestone.”

Green climbs down carefully into the crevasse.

“Listen! … All right!”

He’s found some running water.

“Water’s running right here. I don’t know where it’s going but it’s going someplace. So I’m going to try pouring dye here.”

He pours a cup or so of a bright red fluorescent dye into the snow.

Green marks the spot with a GPS unit. This is a place where surface water and groundwater meet.

“That snow-melt is surface water, it’s going into this sinkhole and it’s becoming groundwater as you’re listening to it.”

That means what happens here on the land directly affects the quality of the groundwater.

“In this case, it’s pretty good, you’ve got conservation tillage, lots of corn stalks left to keep the soil from eroding, and then you’ve got grass, permanent cover, around the sinkholes. So this is actually really good.”

There are wonderful trout streams around here. The map Green is making will help protect those streams by pinpointing the source of the water that feeds them.

In a day or two, Green will check the “bugs” he put in the springs, and find out exactly where the dye from this sinkhole went.

He usually finds water traveling one-to-three miles underground before it surfaces.

When the springshed map is finished, he’ll share it with local governments, farmers, and people who want to protect the water in this landscape.

For The Environment Report, I’m Stephanie Hemphill.

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Capturing Carbon Dioxide From Coal Plants

  • This is an artist's concept of how the FutureGen coal-burning power plant would look. The FutureGen power plant would confine the carbon dioxide that it generates and store it deep underground. (Photo courtesy of the Department of Energy)

We’re hearing more and more these days about global warming and how human activity is believed to be changing the climate. A lot of the blame has gone to pollution from coal-burning plants that produce electricity. Now, the U-S wants to build a plant that would capture and store the pollution… if it can find the right site. The GLRC’s Julie Grant reports:

Transcript

We’re hearing more and more these days about global warming and how
human activity is believed to be changing the climate. A lot of the blame
has gone to pollution from coal-burning plants that produce electricity.
Now, the U.S wants to build a plant that would capture and store the
pollution…if it can find the right site. The GLRC’s Julie Grant reports:


The U.S Department of Energy is chipping in 750-million dollars to the
build what’s called the FutureGen coal-burning power plant, and a
consortium of power companies is contributing an additional 250-
million. That’s a billion dollars of investment.


It’s exciting to Craig Stevens. He’s a spokesman with the Department of
Energy.


“FutureGen could revolutionize the way we use coal in this country and
around the world.”


We get most of our electricity from power plants that burn coal and belch
out greenhouse gases, such as carbon dioxide. But Stevens says
FutureGen would be a cleaner coal-plant…


“And that’s important because today, we in the U.S have a 250 year
supply of coal reserves. It is our most abundant fossil fuel. These
electric plants actually burn coal to produce electricity for millions of
Americans. One of the things we want to do is to use this coal in an
environmentally sensitive manner.”


The hope is that FutureGen will capture the carbon dioxide it generates
to store it deep underground. Scientists plan to purify and liquefy the
CO2, so it’s a water-like substance. Then they want to inject it into the
earth. They plan to dig wells 9000 feet deep for CO2 storage. They also
want to use the space left behind from old coal mines, oil and gas wells.


Geologist Neeraj Gupta is with Battelle Memorial Institute in Columbus.
He’s been researching what’s known as carbon sequestration since
1996…


“And that time this was just the beginning of an idea that you can take
carbon dioxide emissions from large industrial sources, you know, such
as power plants, and you can purify that, to make like a pure CO2s
stream. And, just like you produce oil and gas from the deep geologic
formations, you can take that CO2 and inject it back into the ground into
those same or similar deep geologic formations.”


Gupta says in the same way fossil fuels are trapped deep in the earth,
carbon dioxide could be trapped underground for millions of years, but
there are a lot of uncertainties.


Dr. Rattan Lal is director of the Carbon Management and Sequestration
Center at Ohio State University.


“Uncertainties are… is there going to be leakage? Either at the place
where it’s being injected or several miles away where there might be a
geological fracture in the rock strata.”


Lal says areas that have the right kind of rock layers and are not prone to
earthquakes, would be the best places to experiment with a project like
FutureGen.


Mark Shanahan is director of Ohio’s Air Quality Development
Authority. He thinks his state might be the perfect place because it has
the right kind of geology. At the deepest levels, the rocks aren’t entirely
solid. They’re porous, like a sponge, but with microscopic holes.
Scientists expect those tiny holes to absorb the CO2…


“The second thing is that that porous geology has to be beneath another
formation that is not porous, so the non-porous formation serves as a cap
on top of your CO2. So, once you put it into the porous formation, it
can’t go up.”


So the CO2 is trapped underground… hopefully permanently. Other
states, besides Ohio, think they also have good places for the plant.


The Department of Energy is currently reviewing proposals and plans to
pick a site by late next year. The agency wants to have FutureGen up
and running by 2012.


For the GLRC, I’m Julie Grant.

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Fossils Connect Gap in Evolution

A team of scientists has found fossils that connect a six-million year gap in the chain of human evolution. The GLRC’s Tana Weingartner reports:

Transcript

A team of scientists has found fossils that connect a six-million year gap
in the chain of human evolution. The GLRC’s Tana Weingartner reports:


Scientists found fossils of the species Australopithecus Anamensis in
Ethiopia. The fossils are just over four million years old. Researchers
say the fossils are a clear link between two previously known species of
ape-man.


Dr. William Hart is a team member and a Professor of Geology at Miami
University in Ohio.


“It really shows us evidence of the way early humans evolved in terms of
characteristics of their teeth, as eating habits changed. How other aspects
of their anatomy evolved through time. This is the first time we’ve had
that kind of a snapshot really.”


Similar fossils were first found in Kenya in the 1990’s, but Hart says this
find is special because the fossils are sandwiched between fossils from
the other two species.


The findings were reported in the journal Nature


For the GLRC, I’m Tana Weingartner.

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Building for Disasters

  • People rarely build a house with tornadoes in mind. Some think that developers and homeowners should be more aware of potential natural disasters. (Photo courtesy of the NOAA)

There’s a whole category of disasters people think will probably never happen to them. Major floods, landslides, and earthquakes happen sometimes decades or centuries apart. So, people don’t think about them or they ignore the risks. And, some experts say, that’s why we build or buy houses
in places that really aren’t safe. The Great Lakes Radio Consortium’s
Melissa Ingells reports:

Transcript

There’s a whole category of disasters people think will probably never happen to them. Major floods, landslides, and earthquakes happen sometimes decades or centuries apart. So, people don’t think about them or they ignore the risks. And, some experts say, that’s why we build or buy houses in places that really aren’t safe. The Great Lakes Radio Consortium’s Melissa Ingells reports:


Disasters happen. It’s only a matter of when. The problem is, we prepare for things like tornadoes that happen every year, but we aren’t prepared for a major flood that might only happen once a century. Donald Hyndman is with the Department of Geology at the University of Montana. He’s an expert on disasters.


“People just do not understand the scale of events, they also don’t understand that if in their lifetime there hasn’t been a really major event, that there won’t be a really major event.”


So Hyndman has co-written a new textbook on disasters. He says there’s a lot of pressure to build houses in places that are hazardous. Maybe it’s just a great view, so people build there despite warnings. Or, they think they can stop the ground from moving with retaining walls, or think they can stop floods using levees. Donald Hyndman says that even well built projects just can’t stand the power of nature.


“There is increasing pressure to build in the same lowlands, the same flood plain areas, and the developers say, well, the Army Corps of Engineers has built a major levee or dyke here, that protects people on these floodplains. The problem is, levees break and they always break.”


Donald Hyndman’s co-author is his son, David Hyndman, a geologist from Michigan State University. David Hyndman, says even when a place is a known area for disasters, demand for housing means buildings go up all over again in the same spot.


“There’s always development pressure, and the developers even fairly soon after large floods like some that occurred in California, they keep pushing and the public has forgotten what has occurred and then often the development will be allowed, which causes a disaster afterwards.”


Donald and David Hyndman both say developers don’t help the situation when they build in dangerous areas.


But folks in the housing business say there are plenty of laws to warn potential homeowners, before a house is even built. Lynn Egbert is the CEO of the Michigan Association of Homebuilders. He says that people often ignore the regulations because they want to live where they want to live.


“Consumer desire – consumer interest and desire is the primary reason, even though there are state regulations and federal regulations to put people on notice and protect against the risk for insurance, to locate where they want to locate, which is a property right.”


Egbert says that real estate people and lenders are supposed to let property owners know of the risks. Sometimes that happens. Sometimes people don’t know to ask. And sometimes people think that despite the risks, a disaster just won’t happen to them. Donald Hyndman says we don’t respect how powerful the earth really is.


“Basically, some people feel that they can control nature, or improve on nature, and I’ve actually heard some politicians say we can improve on nature. We can not only not affect the results, those results are typically – they typically backfire. So we really cannot control nature.”


The Hyndmans are hoping their new textbook will help build awareness of all kinds of disasters—but especially the ones that could happen right in our own backyard.


For the GLRC, I’m Melissa Ingells.

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Radioactive Dump Site Close to the Great Lakes?

  • In the United States, low-level nuclear waste is stored in landfills. An Ontario town is proposing to put Canada's low-level nuclear waste in an underground chamber a mile from Lake Huron. (Photo courtesy of the NRC)

In Canada, just across Lake Huron from
Michigan, a small town is offering to be the home of
Canada’s first permanent dump site for radioactive
material. The proposed site is a mile from Lake
Huron. The Great Lakes Radio Consortium’s Mary Ann
Colihan reports on the town’s work to
get the site and the concerns about putting it close
to one of the Great Lakes:

Transcript

In Canada, just across Lake Huron from Michigan, a small town is offering to be the home of Canada’s first permanent dump site for radioactive material. The proposed site is a mile from Lake Huron. The Great Lakes Radio Consortium’s Mary Ann Colihan reports on the town’s work to get the site and the concerns about putting it close to one of the Great Lakes:


Right now, Canada has nowhere to permanently store its low-level and intermediate-level nuclear waste. This waste is not spent nuclear fuel from power plants. It’s contaminated material that’s been exposed to radioactive substances. It could be anything from the protective clothing workers wear at nuclear power plants to parts from reactors, anything that’s been exposed to radioactivity.


The Ontario town of Kincardine – located about 250 miles north of Detroit – has proposed that it be the site of a nuclear waste dump.


So why would a beach town want a nuclear dump?


Kincardine is also a company town. It’s home to the Bruce Nuclear Power Plant. Eighty-percent of the folks who live there work in the nuclear industry. Larry Kraemer is the former mayor. He explains why the permanent dump is essential for the local economy.


“The Bruce nuclear power plant, which is the biggest nuclear power development in North America as well as the largest local employer and one of the largest Canadian investment in any industry that there is.”


Because Kincardine knows the nuclear industry, the residents aren’t afraid to take on these jobs.


But no one ever asked the question if burying nuclear waste a mile from Lake Huron was the best location in Ontario to put the waste site. Frank King is the Director of Nuclear Waste Management and Engineering Technology for Ontario Power Generation, also known as OPG. He says Kincardine does not have to be the best site for the dump.


“It’s not an issue of whether it’s the best. Nobody has to say it’s best. It just has to be shown that it’s safe; that it’s a good site. There is no requirement to show that it’s the best site.”


OPG already stores low and intermediate-level waste from all twenty Ontario reactors at the Bruce Power plant in Kincardine. But above ground storage is getting tight. OPG began looking at its options and with Kincardine’s “bring it on” attitude it seemed like a good place to start.


OPG paid for members of the Kincardine city council to visit nuclear waste storage sites around the world. Councillors came back especially impressed with how the Swedes do it. They bury their nuclear waste in solid granite.


But the stone below Kincardine is not granite. It’s limestone – and no place in the world uses limestone to contain nuclear waste. William Fyfe is Professor Emeritus of Earth Sciences at the University of Western Ontario. He has spent decades studying geology and nuclear waste around the globe.


“Limestone can be much more porous than granite. It has no ability to absorb nasty elements, like you get with some clay minerals and things, to absorb all the dirty chemical species like uranium, for example.”


He does not like the idea of a man-made cavern full of nuclear waste near the Great Lakes.


“Just because you made the waste doesn’t mean you should put it in your backyard. There may be a better place.”


Local environmentalists agree. Given OPG’s record, they don’t trust that the waste dump will be safe. Jennifer Heisz is a founder of the public interest group, Woman’s Legacy, which is focused on the impact of the Bruce nuclear plant on Lake Huron. She says when she requested environmental records from Ontario, she found evidence that the regulators haven’t done a good job of stopping pollution at the plant.


“I received approximately 10 or 15 reports regarding leaking waste sites and the levels coming from the plant were very high – sometimes at 45 times the provincial level for chromium. Vanadium was also one of the chemicals that was contaminating the groundwater and it’s found to be mutagenic to animals.”


Heisz says if OPG is polluting at its existing dump sites, what’s to keep the agency from doing a poor job of storing nuclear waste underground? Ontario regulators say they plan to conduct an environmental assessment. Heisz and her environmental group are raising money for an independent review of deep nuclear storage. The geologist, Professor Fyfe, thinks Kincardine should hold an open house to get the opinions of experts.


“Before we start putting stuff away, let’s invite the bosses of the Swedish group to come and take a look. They are using hundreds of scientists, technicians, and engineers which we are not doing in Canada.”


Few outside the Kincardine area are aware of their nuclear waste dump plans… and fewer still know the site is planned for so close to Lake Huron.


For the Great Lakes Radio Consortium, I’m Mary Ann Colihan.

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A “Pollution Free” Coal-Burning Power Plant?

  • States are competing to have FutureGen, a power plant that claims to be pollution-free, built in their state. (Photo courtesy of U.S. Department of Energy)

Coal-burning power plants from Great Lakes states are often blamed for much of the pollution that hits the East Coast. But now, the federal government is proposing a massive research project that they say could eventually perfect a way to burn high-sulfur coal without sparking pollution. The Great Lakes Radio Consortium’s Bill Cohen has this report:

Transcript

Coal-burning power plants from Great Lakes states are often blamed for much of the pollution that hits the East Coast. But now, the federal government is proposing a massive research project that they say could eventually perfect a way to burn high-sulfur coal without sparking pollution. The Great Lakes Radio Consortium’s Bill Cohen has this report:


The feds are proposing a massive one-billion-dollar plant that’s billed as the world’s first non-polluting, coal-burning power plant. About twenty states say they’ll compete for it. Ohio is one of them. Mark Shanahan of the Ohio Air Quality Development Authority says the plant will first turn coal into gas. And then either recycle or safely store the by-products.


“And when it turns to gas, it’s able to pull out the pollutants much more efficiently and economically. It will pull off hydrogen for fuel cells and it will also test the ability to put carbon dioxide into very deep geology to basically bind it up forever deep in the earth.”


The U.S. Energy Department will pay for most of the plant, but it will be several years before it’s actually online.


For the Great Lakes Radio Consortium, I’m Bill Cohen in Columbus.

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Officials Overlook Illegal Dumping

  • Junk cars dumped on the banks of the Illinois River. (Photo by Romy Myszka)

Americans generate 14-billion tons of waste each year. Most of that trash winds up in landfills, some of it is recycled. But some of it slips through the cracks, winding up in illegal trash dumps throughout the country. Environmental officials are cleaning up a 7-acre pile of waste that was overlooked for so long that it caught fire a few years ago – and kept burning. The Great Lakes Radio Consortium’s Brad Linder reports:

Transcript

Americans generate 14-billion tons of waste each year. Most of that trash winds up
in landfills,
some of it is recycled. But some of it slips through the cracks, winding up in
illegal trash dumps
throughout the country. Environmental officials are cleaning up a 7-acre pile of
waste that was
overlooked for so long that it caught fire a few years ago — and kept burning. The
Great Lakes
Radio Consortium’s Brad Linder reports:


Tucked away in a non-residential section of South Philadelphia, just around the
corner from the
Philadelphia Airport, lies a heap of construction debris. The material was dumped
here years ago
by a demolition contractor, and left to rot…


Occasionally sparking up into flame, the densely packed wood, metal, carpet, and
other debris has
been smoldering below the surface for the past few years.


Down the street is a police impoundment lot, and the Water Department’s waste
treatment site.
And directly across from the dump is a series of community gardens.


Edward Burnabiel’s been tending vegetables here for two decades.


“We raise everything, tomatoes, peppers, eggplants, scunions, onions, celery, squash…”


Burnabiel spends six days a week in his garden. He jokes that it would be seven if
his wife didn’t
drag him to church on Sundays.


A few years ago, he and his fellow gardeners noticed something unusual at the trash
pile across
the street. Every now and again, smoke would billow up from the site — and combine
with the
stench from the nearby sewer plant.


“The smell was awful when it started burning. It would stink, even to go by. It’s
bad enough we
have to smell the poop down there, but then we got to smell that too!”


The gardeners complained to the city. But the trash has been around for well over a
decade.


Kathleen McGinty is Secretary of the Pennsylvania Department of Environmental
Protection.
She says the contractor responsible for the mess has long-since disappeared. That
contractor,
Harold Emerson, also skipped out on a 5-million dollar fine for illegal dumping.


“About thirteen years ago, Mr. Emerson was contracted to take some houses down in
Philadelphia. As part of the deal, for a one year window of time, the agreement was
that he could
temporarily store some of that construction debris here. What Mr. Emerson
conveniently forgot
was the temporary part. And he just took off without ever having done that.”


Today, the trash pile is sometimes referred to as the “Emerson Dump.”
Environmentalists
worried that the burning trash could be a health risk. Construction debris can
include hazardous
chemicals like arsenic. But city Managing Director Phil Goldsmith says tests showed
the fumes
weren’t dangerous. Still, he says cleanup was long overdue.


“Fourteen years for something like this to be sitting around is far too long. And
it’s become a
nuisance. It’s been a place where our fire department has had to come to put out
fires. We should
not have allowed this to happen in the first place. And once it happened, we should
not have
allowed to have it continue here for so long.”


The Emerson Dump is hardly unique. There are illegal dumps all across the country.
But most
are hidden in forests or other out-of-the-way areas, and don’t have the high profile
that comes
with a flaming pile of trash in an urban setting.


Allen Hershkowitz is with the environmental group, the Natural Resources Defense
Council. He
says illegal dumping is often overlooked for more serious environmental concerns,
such as air
and water pollution, or global warming. But he says it’s still a problem
authorities must deal
with.


“In the next 10 years, this country will have to manage about 140-billion tons of
waste of
different types. More than 2/3rds are managed in ecologically inferiors ways,
landfills, surface
impoundments, or incinerators. When you illegally dump waste, you make it that much
harder
for that material to wind up being recycled or properly disposed of.”


Hershkowitz says illegal dumping is directly related to the cost of proper waste
disposal.
Dumping was most prevalent in the late 70s and early 80s, when strict environmental
regulations
led many landfills to close, driving up the costs of waste hauling. Illegal dumping
still occurs,
Hershkowitz says, but less frequently.


Pennsylvania officials are still hunting for demolition contractor Harold Emerson to
force him to
pay his 5-million dollar fine.


But in the meantime, state and city taxpayers are funding a 3-million dollar cleanup
effort. The
fire’s been extinguished, but cleanup efforts are expected to continue through the
end of the year.


For the Great Lakes Radio Consortium, I’m Brad Linder.

The Fate of Slant Drilling

Far below the bottom of the Great Lakes, valuable pockets of oil and
gas sit waiting to be tapped. But laws prohibit offshore drilling. So
for the last twenty years, oil companies have been using another method
to get to the deposits; it’s called directional or slant-drilling. Up
until this point, there hasn’t been much opposition. But now a number
of bills are pending that could change oil and gas development beneath
the lakes. The Great Lakes Radio Consortium’s Wendy Nelson reports:

Student Looks Into Ravines

Many college students approach research papers with dread. But for one
student, a research assignment turned into a geological puzzle…and as he
uncovered answers, he learned a harder lesson: there are some things
people would rather keep quiet. The Great Lakes Radio Consortium’s
Wendy Nelson has the story: