Low impact development (lid)

Definition

Low impact development (LID) is an approach to land use planning and design that seeks to manage stormwater runoff in a way that mimics natural hydrological processes. This method emphasizes the use of green infrastructure and sustainable practices to reduce water pollution, protect water quality, and enhance the ecological health of urban environments. By integrating LID strategies, communities can mitigate the adverse effects of urbanization on water resources while promoting a more resilient ecosystem.

5 Must Know Facts For Your Next Test

1. LID practices include techniques such as rain gardens, bioswales, green roofs, and permeable pavements that help absorb rainwater and reduce surface runoff.
2. Implementing LID can significantly decrease the volume of stormwater runoff, which helps to prevent flooding and protect water quality by reducing pollutants entering waterways.
3. LID is often integrated into zoning regulations and site planning to encourage sustainable development practices in urban areas.
4. One of the key benefits of LID is its ability to restore natural hydrology, promoting groundwater recharge and maintaining the ecological balance within urban settings.
5. LID approaches can also enhance aesthetic value and biodiversity in urban landscapes by incorporating native vegetation and green spaces.

Review Questions

• How does low impact development (LID) differ from traditional stormwater management practices?
  • Low impact development (LID) differs from traditional stormwater management by focusing on decentralized techniques that mimic natural processes rather than relying on centralized systems like detention ponds or pipes. While traditional methods often direct runoff away from developed areas, LID aims to retain and manage rainwater on-site using green infrastructure such as bioswales or permeable pavements. This shift not only reduces runoff but also enhances local ecosystems and promotes sustainable land use.
• Evaluate the effectiveness of low impact development in reducing water pollution compared to conventional methods.
  • The effectiveness of low impact development (LID) in reducing water pollution is generally superior to conventional methods. LID techniques focus on filtration and absorption, allowing pollutants to be naturally treated before entering water bodies. In contrast, conventional methods often channel pollutants directly into storm drains without treatment. Studies show that LID can significantly lower levels of nutrients, sediments, and other contaminants in runoff, leading to healthier aquatic ecosystems.
• Assess the long-term benefits of implementing low impact development strategies in urban planning and community resilience.
  • Implementing low impact development strategies in urban planning has numerous long-term benefits that enhance community resilience. By restoring natural hydrology, LID reduces flood risks and protects local water resources. It also improves biodiversity by creating green spaces that support wildlife habitats. Furthermore, LID can increase property values and improve public health through cleaner air and water. Ultimately, these strategies foster a sustainable environment that can better adapt to climate change impacts.

Related terms

Green Infrastructure: A network of natural and semi-natural features, green spaces, and engineered systems that provide environmental, social, and economic benefits while managing stormwater.

Stormwater Management: The process of controlling and managing the quantity and quality of stormwater runoff to prevent flooding and pollution.

Permeable Pavement: A type of pavement designed to allow water to infiltrate through its surface, reducing runoff and promoting groundwater recharge.