@WorldChanging - From Nuisance to Asset: The Greening of Alleyways
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by Jen Biederman on 01/31/2009
WorldChanging.com Articles: Tools, Models and Ideas for Building a Better Future.
Picture for yourself a concrete-laden alley, with rainwater pooling in its eroded depressions. Tall buildings border the alley, making it a dark and potentially dangerous place. Constructed for cars, trucks and trash, the space is covered in filth. Few people find reason to walk here, save to toss their trash or take out their dogs.
Most major cities harbor hundreds of miles' worth of alleyways like this. Although originally intended to create easy access to garages and to keep garbage bins and dumpsters hidden from view, many alleys in urban spaces have become more of a hindrance than a utility.
But a movement to redesign alleyways into useful spaces is quickly changing them from nuisance to asset. Green Alley projects are taking off across the United States and Canada as a way to reclaim these spaces as filtration and collection centers for rainwater, open spaces and corridors for community members to walk and play, and green space for creating natural habitat or starting local composting efforts.
In Los Angeles, the Back Alley LA project plans to use "community-based landscape design and environmental engineering to transform nuisance alleys into lush green ribbons linking the city's diverse neighbors together in a network of public spaces."While connecting neighbors with open spaces may have been the project's initial inspiration for greening its alleys, Back Alley LA has found numerous benefits for greening alleys:
- Create recreational opportunities. Alleys are a vital land resource in many park-poor neighborhoods, where obesity is a major health problem. Transforming alleys into walkable, bikeable, playable spaces can supplement scarce park resources by using existing underused infrastructure.
- Encourage neighborhood walkability and connectivity. Active, green alleys can provide connections between parks, schools and neighborhood centers. Converted alleys will encourage people to walk rather than drive when making trips to stores, parks, and other nearby destinations.
- Improve water quality and supply. Simple infrastructure changes such as using permeable pavement or adding bioswales in alley will reduce urban runoff, recharge groundwater and improve water quality in streams, rivers, and coastal waters.
- Green the urban matrix. Planting drought-tolerant, California friendly plants in combination with permeable pavement will create shade, retain rainwater, reduce the heat-island effect and provide habitat for native species.
- Reduce Crime. Many residents perceive alleys as unsafe. Improving lighting and making alleys attractive will help address safety concerns and encourage their use.