Rain Barrels and Rain Runoff

  • One city is asking people to use rain barrels like this one to prevent rain runoff that can overload drains and creeks. (Photo courtesy of the Huron River Watershed Council)

As cities cover more and more surface with pavement and buildings,
it’s taking a toll on the environment. Heavy rains flood off the
impervious surfaces and overload drains and creeks. Some cities are
trying new methods to control the problem. As Tracy Samilton
reports, Ann Arbor, Michigan is asking its residents to play a role by
catching their home’s rainwater in rain barrels:

Transcript

As cities cover more and more surface with pavement and buildings,
it’s taking a toll on the environment. Heavy rains flood off the
impervious surfaces and overload drains and creeks. Some cities are
trying new methods to control the problem. As Tracy Samilton
reports, Ann Arbor, Michigan is asking its residents to play a role by
catching their home’s rainwater in rain barrels:



Miller’s Creek in Ann Arbor is not a pretty creek. Part of it runs
alongside a congested four-lane road in one of the most developed
areas of the city. Since there’s almost no place left for rain to seep
slowly in the ground, it pours off the road and parking lots and
rooftops right into the creek:


“What you can see is all the roots that are exposed and very high
banks…”


Laura Rubin is head of the Huron River Watershed Council. Miller’s
Creek is part of the watershed. She says rain storms carry pollutants
and sediment into the creek, and sweep away animal and plant
species that might otherwise live here:


“This is not a healthy creek we call this impaired when they get flows
they’re so strong that they’re tearing away the banks.”


Rubin would like Miller’s Creek to be vibrant with life again one day.
But a lot of changes will have to happen first. She says nearby
businesses will have to build wetlands to retain their storm water.
The city will have to repave the roads to allow more drainage. And in
such a heavily populated area, residents will have to do something
too. Rubin says the first step is teaching people that a single point
source of pollution like a big factory is no longer the biggest threat to
water in their neighborhood:


“Now the main source of pollution is non-point pollution and that’s
us.”


Rubin says rain barrels could play a significant role in healing Miller’s
Creek. Rain barrels are just like they sound: big barrels that collect
water from a home’s rain gutters, to be dispersed later onto lawns or
gardens. One rain barrel can retain up to thirty percent of storm
water falling on a house. Under a dark grey sky that bodes rain,
Dave Aikins shows off his:


“It’s a big, uh, green trash can-like object…aesthetically, uh, I’m not
prepared to defend it.”


Aikins owns a medium-size house in downtown Ann Arbor. Now, with
a rain barrel installed on one side, he’ll catch half the rain that falls on
the house. He uses it to water his garden, but says someday he
might rig it so he can use the water for his laundry machine. A
neighbor kiddy-corner from him has installed one too, and they’ve
had neighborly arguments about proper installation and usage. He
likes how the rain barrel makes him feel.


“Living in an urban area, there’s no direct impact on you whether it
rains or not and this puts you back connected to natural environment,
so you start to care about whether you get your rain today.”

Aikins and other city residents have more than environmental
reasons to install rain barrels. The city water department is using a
carrot and stick approach to encourage their adoption. Installing a
rain barrel gets you a modest discount on the City of Ann Arbor’s new
storm water rates. Tom McMurtry is head of the new program:


“Under the old system, we charged one flat rate for every single
household whether you were an 800-square foot home in the city or a
5,000 square-foot mega-mansion.”


Now, the city will charge four different rates depending on the amount
of impervious pavement and size of the roof on the house. The
highest rate is three times more than the former flat rate, to better
reflect a big home’s impact on the city’s drains and creeks.
McMurtrie says about (blank) people have installed a rain barrel and
applied for the credit. He’d like to see at least 3,000 rain barrels
installed throughout the city. He doesn’t know how long it will take
to accomplish that:


“But every little bit helps.”


It’s an experiment in progress to see if having lots of rain barrels
around Miller’s Creek will help restore it. According to Laura Rubin
of the Huron River Watershed Council, it took about fifty years to
damage the creek this badly. It could take another fifty to bring it
back to health.


For the Environment Report, I’m Tracy Samilton.

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Ten Threats: Bacteria Hits the Beaches

  • Lake Michigan dunes with a power plant in the background. (Photo courtesy of EPA)

If you swim or play on the beaches around the Great Lakes, you’ve
probably heard about ‘beach closings.’ At best, the situation is an inconvenience.
At worst, it’s a serious health risk for some people. That’s because the
beaches are closed due to dangerous levels of bacteria in the water.
Beach closures are not all that new, but Shawn Allee reports… the
science behind them could change dramatically in the next few years:

Transcript

We’re continuing our series, Ten Threats to the Great Lakes. Our field guide through the series is Lester Graham. He says anyone who visits Great Lakes beach is familiar with one of the Ten Threats.


If you swim or play on the beaches around the Great Lakes, you’ve
probably heard about ‘beach closings.’ At best, the situation is an inconvenience.
At worst, it’s a serious health risk for some people. That’s because the
beaches are closed due to dangerous levels of bacteria in the water.
Beach closures are not all that new, but Shawn Allee reports… the
science behind them could change dramatically in the next few years:


(Sound of dog and beach)


During the summer, dogs and their owners usually play together in the
water along this Lake Michigan beach, but today, several dog owners
scowl from the sand while their dogs splash around.


“It’s e coli day … it’s a hardship.”


This beachgoer’s upset, and like she said, e coli’s to blame.


Park officials tested the water the previous day and found high levels of
the bacterium. Missing a little fun on the beach doesn’t sound like a big
deal, but there’s more at stake than recreation.


Cameron Davis is with the Alliance for the Great Lakes, a regional
advocacy group.


“Beaches are most peoples biggest, tightest connection to the Great
Lakes, so when beaches close, they really impact our quality of life in the
region.”


And ultimately, health is at stake too. For a long time, scientists tested
beach water for e coli because it’s associated with human feces. That is,
if e coli’s in the water, there’s a good chance sewage is there too, and
sewage can carry dangerous organisms – stuff that can cause hepatitis,
gastric diseases, and rashes.


Sewage can get into the Great Lakes after heavy rains. That’s because
some sewers and drains can’t keep up with the flow, and waste heads to
the lakes.


For a long time, scientists thought human feces was the only source of e
coli in Great Lakes water, but a puzzling phenomenon has them looking
for other causes, too. Experts say cities have been dumping less sewage
into the Great Lakes in recent years, but we’re seeing more e coli and
more beach closings.


Paul Bertram is a scientist with the U.S. Environmental Protection
Agency. He says, we’re closing more beaches because we’re testing
them more often.


“But I don’t think it’s because the Great Lakes are getting more polluted,
and more filled with pathogens, I think we’re just looking for it more.”


If we’re finding more e coli because we’re testing more often, we still
have a problem. We still need to know where the e coli’s coming from.
Bertram says there might be another culprit besides sewage.


“There is some evidence that it may in fact be coming from birds, flocks
of seagulls, things like that.”


But some researchers doubt sewage and bird droppings can account for
high e coli levels.


(Sound of research team)


A few researchers are sorting vials of water in a lab at the Lake Michigan
Ecological Research Station in Indiana.


Richard Whitman leads this research team. He says, in the past,
scientists could predict beach closings by looking out for certain events.
For example, they would take note of sewer overflows after heavy rains.
Whitman says researchers can’t rely on those triggers anymore.


“A large number, maybe even a majority of closures remain unexplained.
Today, we have closures and there’s no rainfall, may not even be
gulls, and we don’t know why the bacteria levels are high.”


Whitman has a hunch that e coli can grow in the wild, and doesn’t
always need human feces to thrive.


“This is my theory. E coli was here before we were. It has an ecology of
its own that we need understand and recognize.”


The idea’s pretty controversial. It runs against the prevailing theory that
e coli only grows in waste from warm-blooded animals, such as human
beings and gulls, but the idea’s also a kind of political bombshell.


If he’s right, it would mean our tests for e coli aren’t very accurate – they
don’t tell us whether there’s sewage around. After all, if e coli is nearly
everywhere, how can we assume it’s a sign of sewage?


“As a pollution indicator, you don’t want it to multiply. If it’s got an
ecology of its own, multiplying on its own, doing its own thing, then it’s
not a very good indicator.”


Whitman wants us to try other kinds of tests to find sewage. One idea is
to look for caffeine in the water. Caffeine’s definitely in sewage but it’s
not found naturally in the Great Lakes, but until we change our water
tests, Whitman will continue his work. He says we still need to know
how much e coli’s in nature and how much is there because of us.


Environmentalists want the government to keep a close watch on the new
science. They say we can’t let questions about the relationship between
e coli and sewage stop our effort to keep sewage and other waste out of
the Great Lakes.


For the GLRC, I’m Shawn Allee.

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