What is Sustainable Site Development?

Here is an article on Sustainable Development:
From Tom Barrett, Green Water Infrastructure.

Sustainable Site Development

Sustainable site development has the goal of preserving or restoring a site’s natural ecosystem. The most widely recognized definition of sustainable development is development that “meets the needs of the present without compromising the ability of future generations to meet their own needs.”^[1]

Sustainability Starts with the Soil

Soil is the soul of project

Soil is the soul of a project. Today, when a construction project begins, first  the vegetation is removed. Clear-cutting the trees. Removing any obstructions so the construction equipment can freely traverse the site. If the timber cannot be sold off as lumber (and usually the timber cannot be sold as lumber) the wood is burned onsite or chipped into mulch.

After clearing out the construction traffic obstructions, the topsoil is scraped off. Removing most if not all the rich soil and micro organisms. The soil’s fertility, permeability, and ability to sustain life has been irrevocably transformed into a barren desert. The remaining hard-panned, encrusted soil resembles a track of land with the texture of a poorly compacted piece of asphalt.

When the construction project is complete, new topsoil has to be trucked in for any chance for plant survival. And forget about any wildlife. They have abandoned the site, gone for the hills, literally moved to higher, less inhabited, ground.

Protecting and preserving the soil through minimal site development practices is the starting point for sustainable site development. Restoring an existing site’s soil to a native, natural condition is imperative and the benefits are extraordinary.

Developing Water Resources

Water is the life-blood of the environment

Water is the life-blood in the environment.  Water in the environment is the connecting force that ties the environment together. In a natural, forested environment, seventy to ninety percent of the rain fall stays on site. Less than one percent runs off the site.

In nature’s hydrologic (water) cycle, in a naturally, forested area, forty to fifty percent of the rain fall is returned to the atmosphere as water vapor by evaporation and transpiration. Twenty to thirty percent of the rain fall enters streams and waterways after being cleansed by the soil through the soil interflow. The soil interflow is the lateral movement of water through the upper levels of the soil. The remaining ten to forty percent of the water percolates down through the soil in the aquifer.

Today, we rapidly collect the rain water and pipe it into our streams and waterways. This rapidly collected rain water carries debris and pollution from our roofs, parking lots, and roadways. Additionally, in many communities throughout the nation, storm water is combined with waste water and treated  as waste water. When communities combine storm water systems with waste water systems the result often is the overflow of raw sewage into the local streams and waterways. Storm water is the single largest source of non-point source water pollution. There has to be a better way!

The result from a low impact site is a dramatic reduction in storm water runoff, resulting a dramatic reduction or elimination of non-point source pollution.

Local pollutants stay local. Stream sedimentation is almost completely avoided. The local aquifer is replenished.

Trees are the spirit in the woods

Plant Trees

Simply, plant trees. Trees are the spirit in the world. The environmental benefits of trees are without limit and almost unappreciated. The lack of nature in our environment is creating a “nature deficit disorder.” Richard Louv in his book, Last Child in the Woods,  says,”Unlike telivision, nature does not steal time, it amplifies it.” Powerful experience with nature can have a positive influence on attention deficit disorder, reduce depression, reduce stress, and improve creativity. The need to plant trees is largely unrecognized in our communities and the need has never been greater.

The EPA reports that tree planting sequesters carbon and enhance the quality of soil, water, air and wildlife. If every family planted just one tree, the amount of CO² in the atmosphere would be reduced by one billion pounds annually. One tree will absorb about ten pounds of air pollutants, including four pounds of ozone.  Trees planted around a home can reduce air conditioning usage by 30%.  Over a fifty-year lifetime, a tree generates $31,250 worth of oxygen, provides $62,000 worth of air pollution control, recycles $37,500 worth of water, and controls $31,250 worth of soil erosion.^[2]

(Source: http://www.coloradotrees.org/benefits.htm#2)

On a larger scale, one acre of new forest will sequester about five thousand pounds of carbon annually. Each year a tree will assimilate thirteen pounds of CO².

Trees reach their most productive stage of carbon storage at about ten years.

The benefits of trees go far beyond carbon sequestration and energy savings. Trees restore the natural balance of nature. People are more satisfied; communities are more productive; biodiversity increases.

Tools for Sustainable Site Development

Since the turn of the last century, little has been done to improve our gray infrastructure. In 2009, the American Society of Civil Engineers (ASCE) graded our drinking water and waste water infrastructures a “D” minus, the lowest grades in any infrastructure category. The next lowest grade is “F” ­ failure. Technology has improved dramatically.  Thinking has not. Though we might not always hear about it, sustainable development (and all the interrelated issues associated with it) is an urgent issue.

Green roofs, rainwater harvesting, condensate recovery, permeable paving, rain gardens, bioswales, and daylighting streams are effective tools for changing our world; enhancing our environment. Political will has been slow-paced at best. Much has been written about this.  Little has been done.

For example, there are:

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The more I learn about plants, trees, and their importance, the more amazed I am.  This article, explained alot for me, especially about the importance of trees.  If you also liked it, please share it with people you know, so others can benefit from it too.

One more thing.  Plant some trees around your home, your community, and give some thought into which trees.  Don’t just plant ornamentals.  How about edible ones, or ones that will attract hummingbirds, other birds, bees, etc.