Low-impact development (lid)

Definition

Low-impact development (LID) is an approach to land use and site design that aims to manage stormwater runoff through environmentally sensitive practices. This concept emphasizes the use of natural systems and processes to mimic the pre-development hydrology of a site, thereby reducing flooding and improving water quality. By integrating features like green roofs, rain gardens, and permeable pavements, LID promotes sustainable urban planning and minimizes negative impacts on watersheds.

5 Must Know Facts For Your Next Test

1. LID techniques are designed to manage rainwater where it falls, promoting infiltration and evapotranspiration instead of directing it to traditional drainage systems.
2. The implementation of LID can significantly reduce the volume of runoff, which helps in decreasing erosion and sedimentation in nearby water bodies.
3. Using native plants in LID practices can enhance biodiversity, as they provide habitats for local wildlife while requiring less maintenance and water.
4. LID practices can also improve urban aesthetics by incorporating green spaces into built environments, enhancing property values and community well-being.
5. Incorporating LID can lead to long-term cost savings by reducing the need for extensive stormwater infrastructure and minimizing flood damage.

Review Questions

• How does low-impact development (LID) differ from traditional stormwater management techniques?
  • Low-impact development (LID) focuses on managing stormwater at its source through environmentally friendly practices rather than relying on conventional methods like large drainage systems. While traditional techniques often channel runoff away from sites, LID encourages natural infiltration and evaporation, aiming to replicate pre-development conditions. This approach not only helps reduce flooding but also improves water quality by minimizing pollutants entering waterways.
• What role does vegetation play in low-impact development, and how can it enhance the effectiveness of LID practices?
  • Vegetation plays a crucial role in low-impact development by promoting water absorption, slowing down runoff, and filtering pollutants. Planting native species in rain gardens or green roofs enhances biodiversity and creates habitats for wildlife. Additionally, healthy vegetation helps stabilize soils, reduces erosion, and contributes to the overall aesthetics of urban areas. By integrating plants into LID designs, communities can improve both ecological health and urban livability.
• Evaluate the potential long-term environmental and economic benefits of implementing low-impact development strategies in urban planning.
  • Implementing low-impact development strategies can provide substantial long-term environmental benefits, including improved water quality, reduced flooding risks, and enhanced biodiversity. Economically, LID can decrease costs associated with stormwater management infrastructure maintenance and repairs while potentially raising property values through attractive green spaces. Additionally, LID promotes resilience against climate change impacts by effectively managing extreme weather events. Collectively, these factors underscore the importance of integrating LID into urban planning for sustainable community development.

Related terms

Stormwater Management: The process of controlling the quantity and quality of runoff from a site to reduce flooding and pollution.

Permeable Pavement: A paving surface that allows water to pass through, facilitating groundwater recharge and reducing surface runoff.

Green Infrastructure: An approach to managing stormwater that uses natural processes, such as vegetation and soil, to enhance water quality and provide other environmental benefits.