Rain gardens are designed to capture stormwater runoff, holding it until the water soaks into the ground. The water may come from any impervious surface including roofs, streets, sidewalks, or even lawns. Normally this water (along with sediments and pollutants) would be directed into storm drains, ultimately being discharged into natural waterways. When water is diverted to a rain garden, however, the specially mixed soil acts like a sponge, holding water during rain storms, then allowing the water to permeate into the surrounding soil quickly. Plants in a rain garden must withstand both wet and dry conditions, as well as periodic inflow of pollutants. Many types of plants might be used including trees, shrubs, and flowering perennials Various plants native to Maryland and the mid-Atlantic region are ideal for rain gardens.
Rain gardens are one example of "low impact development" (LID), a cutting-edge environmental approach to urban development, which Montgomery County has been using in recent years. LID recognizes the significant negative impact of towns and housing developments on plants, animals, and waterways. LID methods reduce the damaging effect of human habitation on natural habitats. Other examples of low impact design include recycling, rain barrels, permeable paving, low-water use lawns, and native gardens.
This
project was made possible through the generous support of the following organizations:
Design:
Low Impact Development Center, Inc.
Ann English, ASLA, RLA LEED AP Landscape Architect
Labor, Excavation and Hardscape:
J&G landscape Design, Inc.
Plants:
Montgomery County Dept. of Environmental Protection, RainScapes Program
Silver Spring Garden Club, in Honor of Alice Fransen
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