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Managing stormwater can be tougher when water can’t drain naturally. “Green infrastructure” approaches are a solution to drainage issues caused by “impervious surfaces”.

“Impervious surfaces” are surfaces like concrete or pavement (most sidewalks and roads) that don't allow water to soak into the ground. Most impervious surfaces are created by humans and are an unnatural part of most ecosystems. Think about where you notice often flooding or pooling of water.

“Green infrastructure” is an approach to water management that protects, restores, or mimics the natural water cycle. Green infrastructure is effective, economical, and enhances community safety and quality of life. Some examples are planting trees, restoring wetlands, or using permeable asphalt to reduce the need for costly stormwater facilities like pumps, storage tanks or even water treatment plants.

More Info:

Infrastructure Fact Sheet (English)

Infrastructure Fact Sheet (Spanish)