Conservation Subdivision Design

Native planting in CSD
Conservation subdivision design (CSD) entails a broad range of design principles and parameters that collectively enhance environmental quality, the aesthetics and quality-of-life of residents in the subdivision, and the profitability of the development for the developer.

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Green Roofs

A green roof
Green roofs are becoming a critical component in "green" urban infrastructure, and can provide a wide variety of environmental, aesthetic and cost benefits. A green roof can cover any size building and be used on any building type given the building has been designed or retrofitted to structurally support the weight. It generally consists of drought-tolerant vegetation and light-weight growing medium layered over an efficient drainage system and waterproofing membrane.

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LID Atlas

The Low Impact Development (LID) Atlas was created for the National Nonpoint Education for Municipal Officials (NEMO) Network by the Connecticut NEMO Program and the California Center for Water and Land Use (http://lidmap.uconn.edu/). The LID Atlas is an interactive tool that provides examples of LID implementation throughout the country.

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Bioretention Gardens

Example of a bioretention garden
View examples of bioretention gardens in Nebraska.

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Low Impact Development

The key premise of low impact development (LID) is to allow natural systems to manage stormwater when and wherever possible.  LID takes advantage of existing natural features and also designs and constructs systems to imitate natural processes, for example, green roofs, bioretention gardens, and permeable pavement. 

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Permeable Pavers

Example of a permeable paver
Permeable pavers let water pass through the spaces between them which are often filled with small gravel or sand.

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Green Roofs

Green Roof Video Thumbnail
Green roofs help manage stormwater by capturing rainfall.

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Rain Gardens

Rain Garden Design Guide Cover
You can reduce water runoff from your yard by planting a rain garden. A rain garden is a small depression planted to flowers and ornamental grasses. It is designed to temporarily hold and soak in rain water from a roof, driveway or open area. A rain garden is not a pond or wetland. It is dry most of the time and holds water after a rain. Water collected in the rain garden slowly soaks into the soil and disappears in less than 48 hours.

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Common Pollutant Types

Sediment (sand, silt, and clay particles): Bare spots in lawns and gardens, lawn and landscape renovation projects, sloping areas, soil washed from vehicles, roof tops and other hard surfaces like driveways, pond or stream bank erosion, home construction.

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Key Tips for Reducing Pollutants

Lawnmower
Water pollution can come from a variety of sources. Soil, grass clippings, fertilizer, pesticides, paint thinners, and motor oil can pollute water if picked up by stormwater runoff.

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