Tuesday, December 6, 2011

Toxic sediment

Sediments are most often transported by water (fluvial processes), wind processes) and glaciers. Beach sands and river channel deposits are examples of fluvial transport and deposition, though sediment also often settles out of slow-moving or standing water in lakes and oceans. Desert sand dunes and loess are examples of aeolian transport and deposition. Glacial moraine deposits and till are ice-transported sediments
A grim reminded of the widespread result(s) of sediment is exacerbated with the all-too common warning of resulting and uncontrolled erosion.
A survey on the sources of sediment pollution resulting with the warning for citizens not to harvest vegetables grown on artificial wetlands.

We must take steps to mitigate erosion

Tuesday, October 18, 2011

WASHINGTON, October 13, 2011

A new USDA study shows that farmers using combinations of erosion-control and nutrient-management practices on cultivated cropland are reducing losses of sediment, nitrogen and phosphorous from farm fields and decreasing the movement of these materials to the Great Lakes and their associated waterways.

New USDA Report

Capitol Hill is a scrum of lobbyists fighting over a shrinking budget these days, and farm subsidies are under attack as never before. Some of those subsidies appear likely to die.
But let's talk about one kind of farm subsidy, one that environmentalists are fighting to preserve. Believe it or not, so are the people who run the water systems in American cities. This week, some of these groups wrote a letter to Congress asking lawmakers to keep funding these programs.

We're taking about "conservation" subsidies. Some people call them "green payments," and they add up to about $5 billion each year.

Under these programs, the government pays farmers to do things that are good for the environment, but aren't profitable. The biggest single source of green payments, the Conservation Reserve Program (which costs just under $2 billion each year), pays farmers to take cropland out of production for ten years or more and instead plant native grasses (or sometimes trees) on that land. At its peak a few years ago, 36 million acres were part of the CRP. That's an area the size of the state of New York. It's been declining in recent years. Now it's more like the size of Indiana.

Other programs pay farmers to turn cropland back into wetlands (good for wildlife and water quality), or to introduce farming practices that reduce soil erosion and fertilizer runoff or provide more habitat for wildlife.

Farm Subsidies Birds And Fish Would Choose

Thursday, March 10, 2011

Asbestos contaminated soils: the health risk lurking in your backyard?

Asbestos was widely used in all types of buildings until about 30 years ago. As a result, asbestos contaminated soils are often present on brownfield sites – before, during and after redevelopment. We frequently come across high levels of asbestos contamination in gardens and community recreation areas. During dry weather, asbestos can easily become airborne as a result of any soil disturbance, for example from children playing, gardening and major construction activities. Asbestos contaminated soil can easily be transferred indoors on shoes or carried on vehicle wheels to public highways, causing additional, secondary exposures. Tailored risk assessments and asbestos management procedures, appropriate for the current/planned use of affected ground, are required to avoid increased risks of lung cancer and mesothelioma.
Although statistics show a growing number of people who have never worked with asbestos are suffering with an asbestos-related disease, most documented cases are caused by occupational exposure to the toxic mineral. This is due to the likeliness of repeated exposure, which occurs through standard operations in a variety of industries and jobsites.
Jobsites such as asbestos mines, processing plants and
… read more