A Salty Subject

More and more environmental groups are making noise about the devastating impact winter salting has on the environment which is raising awareness and forcing lawmakers to look at alternative solutions.  In Canada alone, the country applies five million tonnes (over 110 billion pounds) of salt during an average winter.  This salt contaminates ground and freshwater, degrades habitat, alters aquatic ecosystems and causes corrodes critical infrastructure such as water pipes.

The massive increase to the salt content of soil located next to roads affects roadside vegetation; often killing the vegetation and impeding its ability to grow back.  Unfortunately, many invasive plants are well-adapted to high levels of salt, leading to a greater potential for invasive species to take over and spread along roadside communities. Researchers in Massachusetts found that road salt use directly aided the spread of invasive phragmites along the Kampoosa Bog in Stockbridge. 

Many wild animals such as moose, deer, cattle, woodchucks, squirrels and mountain goats require essential elements such as sodium in the springtime for bone, muscle and other growth.  Salt deposits exacerbate roadside collisions as the wild salt-seekers are drawn from miles away to lick the mass salt deposits left near highways and roads during the spring.

People living in snowy climates are well away of the devastating effects salt has on their vehicles, perhaps not on what can occur within their own bodies.  Excess salt can contaminate ground and freshwater; water that we drink and use to prepare food.  Not all the salt can be filtered out of the water and can pose health risks to those who require sodium-reduced diets or those with hypertension.

High levels of chloride in water can corrode plumbing and leach harmful metals into drinking water, posing health risks, particularly for people using well water. Corroded water pipes lead to breaks which can cause disruption in service and even flooding.  Not to mention that the elevated chloride levels can also corrode appliances using water such as dishwashers and washing machines.

Sustainable alternatives are being implemented in both Canada and the United States.  Many Canadian municipalities are using a more environmentally friendly de-icing agents such as a mixture of beet juice and salt.  Beet juice works in the same was as road salt, but the beet juice stays on the road longer, so it is not only effective, but requires fewer applications.  In Wisconsin, cheese brine; an industrial byproduct from the dairy industry that is normally dumped as waste, is being combined with salt to create a unique deicer.

More and more people are experimenting with sustainable salt solutions and hopefully in the near future less salt will be used.

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Phragmites: Big Grass - Big Problem

A fairly dry winter with very little snowfall plus near drought like conditions this summer has lead to even more aquatic plants.  Another invasive species is quickly filling in exposed lake beds which are occurring due to historic low water levels.  Phragmites, the Common Reed, is a large perennial grass that can grow up to 20 feet tall, not only blocking shoreline views, but it reduces habitats for a variety of animals and competes with native plants for limited resources including habitat, food, and light.

Phragmites is found on every continent except Antarctica.  This colonial plant is capable of forming large stands or colonies arising from one or a few seeds or plant pieces.  These colonies form along the margins of streams and in marshes and ditches.  They form in brackish water and in mucky moist soil of exposed lakebed and coastal wetlands.  It will grow in damp ground, in standing water up to three feet deep, and even as a floating mat. 

The extensive reed beds can spread at sixteen feet or more per year by horizontal runners, which put down strong, deep roots at regular intervals.  The stems grow from six feet to twenty feet tall, with thick feathery plumes of seeds.  The tallest Phragmites plants are common in areas with hot summers and fertile growing conditions.  Eradication of Phragmites is not likely once it successfully invades an area, but with proper control methods and annual maintenance, native plant populations can be reestablished, wildlife and wetland habitat improved, and recreational opportunities restored.

Phragmites is a very aggressive plant and outcompetes nearby vegetation for limited resources including habitat, food, and light.  It grows so tall and the thick feathery plumes shade out native vegetation and makes coastal shorelines and wetlands unfit for wildlife.  One study has determined that the plants growth have reduced suitable nesting habitat for several species of turtles by affecting nest temperature.

Control of Phragmites is more easily achieved in areas where growing seasons are short and plant growth is less vigorous.  Control methods include spraying herbicides, mowing, discing, bulldozing, crushing, shading, dredging, flooding, draining, burning, and grazing; although a combination of treatments is most effective.  After successful treatment, native plants will once again become established in these areas.

 The Aquarius Systems Swamp Devil can easily chop through the thick Phragmites.  This heavy duty shredder effortlessly plows through the stubborn growth while carving through the subsoil creating an open water channel up to three feet deep and eight feet wide.  An aquatic weed harvester can then follow behind collecting the chopped vegetation for disposal.  The Swamp Devil easily maneuvers in shallow environments such as wetlands and marshy aquatic areas. 

While not specifically designed for Phragmites removal one of Aquarius Systems customers has achieved success in reclaiming a pond from the over abundance of Phragmites.  An EH-220, one of our smaller aquatic weed harvesters, ran for six hours per day for six weeks to clear a 20 acre pond of Phragmites and other aquatic invasive species. 

 

Watch the Swamp Devil in Action

Read more about the EH-220 versus phragmites