Monday, November 26, 2007

Something to consider

Concrete, asphault and flooding seem to be keeping pace with each other as Boone gets covered by more and more pavement. A nursing home was forced to relocate because the evacuation had become an accepted measure of the severity of the flooding, perhaps a Stage Three (significant) event; 'have they moved them out of the home?'. Flooding of the mall parking was Stage One (common).

I doubt they will move the mall.

Permeable Pavement
Pavement system that allows water to seep through the surface, permitting natural filtration

Just as drinking water can be filtered to remove impurities, the soil particles filters rainwater percolating through soil on its way to surface waters and to groundwater aquifers, This important step in the natural process of water purification is bypassed when rainwater falls on impermeable pavement surfaces or roofs and is carried directly through storm drainage systems into waterways. Since engineered curb and gutter storm drainage systems are costly to design and build, use of permeable pavement systems can also result in a reduction of construction costs for developers or municipalities. Pervious pavements are also denoted as porous or open-graded pavement.

Pollution carried in rainwater runoff is another concern, especially in urban areas. Storm water flowing across streets and sidewalks picks up contaminants associated with air pollution particles, spilled oil, detergents, solvents, de-icing salts during freezing conditions , dead leaves, pesticides, fertilizer, and bacteria from pet waste. Natural filtration of water through soil is the simplest way to control these pollutants, and is a direct advantage of permeable pavement.

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