Category: water

Study tracks startling salinization trend in U.S. lakes

Road salt, development blamed for spiking chloride levels

Water quality in freshwater lakes near roads where salt is used is rapidly deteriorating. @bberwyn photo.

Staff Report

Lakes from New England to the Midwest are getting saltier from the massive use of chemicals to melt ice on roads, as well as from urban development. Under the current trend,  many North American lakes will surpass EPA-recommended chloride levels in 50 years, spelling trouble for aquatic ecosystems.

The majority of the lakes (284) were located in a North American Lakes Region that includes Connecticut, Maine, Massachusetts, Michigan, Minnesota, New Hampshire, New York, Ontario, Rhode Island, Vermont, and Wisconsin. Continue reading “Study tracks startling salinization trend in U.S. lakes”

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Sunday set: Wien scene

City sights …


A short photographic stroll through a city that consistently ranks near the very top worldwide for quality of life.  Vienna’s coffee houses and parks are definitely part of its charms, but it’s also a European hub science, culture, literature and tech innovation. And there are connections to my old stomping grounds in Colorado. For example, I spent several years following the story of how parasitic whirling disease wiped out most of Colorado’s rainbows, and how biologists were working to restore the popular game fish with a population resistant to the disease. Then last summer, as I was working on a story about a massive fish die-off in the Yellowstone River, my research led me to an Egyptian-born research scientist at the University of Vienna who has been studying various parasitic trout diseases, and linking them with global warming. Turns out that Mansour El-Matbouli also was an instrumental figure in the efforts to breed the strain of rainbow trout that are resistant to whirling disease, and that he had worked closely with aquatic biologists in Colorado that I also had interviewed for my stories in Colorado. We’re facing global environmental challenges, and they require a global and science-based response. It’s a small world.

Coal ash pollution poisoning fish in North Carolina

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Toxic pollution from coal-fired power plants builds up in fresh water fish. @bberwyn photo.

Trump’s proposed Cuts to federal regulations likely to lead to more environmental woes

Staff Report

Coal ash waste is poisoning fish in North Carolina lakes, scientists said this week announcing findings from a new study supported in part by the EPA. The research by scientists from Duke University showed that potentially harmful levels of selenium are building up because of emissions from coal-fired power plants.

“Across the board, we’re seeing elevated selenium levels in fish from lakes affected by coal combustion residual effluents,” said Jessica Brandt, a doctoral student in environmental health at Duke’s Nicholas School of the Environment, who led the study, published this month in the journal Environmental Science & Technology. Continue reading “Coal ash pollution poisoning fish in North Carolina”

Colorado River Delta still benefiting from flood experiment

Colorado River delta
The Colorado River Delta captured in a 2004 image from the International Space Station. Via NASA Earth Observatory.

Monitoring report documents renewed life

Staff Report

In just two years following a man-made flood in the Colorado River Delta, cottonwoods and willows have grown 10 feet tall, rebuilding habitat for other native plants and animals, according to a new monitoring report on the international experiment to re-water the long-arched region.

“This short-term event has had lasting consequences. This really demonstrates that a little bit of water does a lot of environmental good,” said Karl W. Flessa,  professor of geosciences at the University of Arizona. Continue reading “Colorado River Delta still benefiting from flood experiment”

Sunday set: Riverside

Rock my soul

During out last reporting trek we visited a unique wildnerness area in central Austria, in the far eastern reaches of the Alps, to learn how resources managers and citizens perceive wilderness in the heart of a densely populated country. The area is the watershed of the Ybbsteinbach, which flows into the Ybbs, and then into the Danube, which is really a mountain river at heart. Learning how resources managers are trying to recreate a true undisturbed wilderness area here was inspiring, and we have a story coming up, but for now enjoy these autumn riverside scenes and visit our online gallery for more landscape photography. And learn more about our reporting in the Alps here.

Study tracks amphetamine pollution in Baltimore streams

Illegal drugs harming stream aquatic ecosystems

This is the local stream, Meadow Creek, that starts high in the Eagles Nest Wilderness Area and flows through our backyard.
A new study found that amphetamine pollution may be harming stream health. @bberwyn photo.

Staff Report

As if toxic waste from chemical manufacturing and other industrial processes weren’t enough, scientists say some streams are also being fouled by remnants of amphetamines — in some cases at high enough levels to alter the base of aquatic food chain.

A new study, published in the journal Environmental Science & Technology, traced the presence of illicit drugs at six  stream sites around Baltimore, focusing on the Gwynns Falls watershed, which is part of the Baltimore Ecosystem Study Long-Term Ecological Research program. Two rural streams were also sampled in the Oregon Ridge watershed, the closest forested region. Continue reading “Study tracks amphetamine pollution in Baltimore streams”

Colorado River pulse flow released surge of greenhouse gases

New growth in delta could offset CO2 released from riverbed

Colorado River delta
The Colorado River Delta captured in a 2004 image from the International Space Station. Via NASA Earth Observatory.
Our special series on the Upper Colorado River is made possible with support from the Colorado River Water Conservation District. Contact Summit Voice for other sponsorship opportunities and click on the banner to visit the river district online.
Supported by the Colorado River District.

Staff Report

Human management of natural ecosystems always has unintended consequences, and the Colorado River is no exception. After decades of intense dam building and diversions, the mighty river is a mere shadow of it former self, reduced to a trickle in some places and polluted by return flows in others. Along its entire length, ecosystems, including riparian zones and native fish, have suffered, with some of the biggest impacts in the Colorado River delta.

In an effort to restore at least some key reaches of the river, scientists and water managers have teamed up to try mimic some of the Colorado’s natural functions, with controlled releases of water to build up beaches. Those efforts culminated in early 2014 during an eight-week experiment that unleashed a mighty torrent of water from Morelos dam (on the border with Mexico and the USA).

The huge surge (130 million cubic metres) of water raised river levels down to the delta, which has been starved of water for decades. Scientists closely monitored how the release — and potential future releases — affect agricultural crops and natural plant and animal life of the lower delta.

But the pulse flow had another side effect. As the water washed over earth and rocks that had been dried out for many years, it dissolved carbon and sent a surge of greenhouse gases into the atmosphere. Continue reading “Colorado River pulse flow released surge of greenhouse gases”