Explain how replacing asphalt with gravel or other permeable material can improve water quality.

Answer 1

Replacing asphalt with gravel or other permeable material can improve water quality because it allows rainwater to soak into the ground instead of flowing along the pavement and into storm drains, carrying pollutants with it. The permeable material allows the water to filter through the ground, which helps to recharge groundwater supplies and prevent flash flooding. It also allows for natural filtration, where soil microbes and plants can remove pollutants from the water before it enters groundwater or streams. This reduces the amount of pollutants that reach bodies of water, improving their quality and protecting aquatic habitats. Additionally, it reduces the amount of stormwater runoff, which can overwhelm wastewater treatment systems and cause sewage backups and other environmental problems. Overall, the use of permeable materials for pavement can promote sustainable water management and reduce the environmental impact of urban development.