With the colder months approaching and autumn in full effect, cities across North America brace for increased rainfall. This pattern has become increasingly pronounced in recent years due to climate change. According to the National Oceanic and Atmospheric Administration (NOAA), precipitation patterns are shifting, with more intense rainfall events occurring more frequently. These extreme weather events can overwhelm traditional stormwater infrastructure, leading to flooding, erosion, and pollution. To mitigate these challenges, businesses, architects, and property managers are turning to green infrastructure solutions in order to maximize efficiency in stormwater management.
The Role of Green Infrastructure for Stormwater Management
Green roofs, also known as living roofs, are a valuable tool for stormwater management. Over the last decade, these building features have gained widespread attention for their ability to reduce stormwater runoff and improve water quality. A study conducted by the American Society of Landscape Architects (ASLA) found that green roofs can reduce stormwater runoff by up to 55% compared to traditional roofs. These vegetated surfaces reduce stormwater runoff by:
- Intercepting rainfall: The plants on a green roof capture rainwater, allowing it to evaporate or infiltrate slowly into the underlying soil.
- Reducing peak flow rates: Green roofs help to slow down the rate at which rainwater enters the stormwater system, reducing the risk of flooding and erosion.
- Improving water quality: Plants on green roofs filter pollutants from rainwater, improving the quality of water that enters local waterways.
- Permeable pavements: These surfaces allow rainwater to infiltrate into the ground, reducing runoff and helping to recharge groundwater supplies.
- Bioswales: These vegetated channels capture and filter stormwater runoff before it enters the sewer system.
- Rain gardens: These shallow depressions can collect rainwater and allow it to infiltrate slowly into the soil, providing a habitat for wildlife and improving water quality.
Urban Heat Island Mitigation
Green infrastructure offers numerous other benefits for businesses, including:
- Reduced stormwater costs: By reducing the amount of stormwater runoff, green infrastructure can help to lower costs associated with stormwater management fees and infrastructure maintenance.
- Improved property values: It is a well-known fact that properties with green infrastructure have higher property values.
- Reduced urban heat island effect: Green infrastructure can help to mitigate the urban heat island effect by providing shade and cooling our cities through evapotranspiration.
- Enhanced biodiversity: Green infrastructure can support a diverse range of plant and animal species, contributing to urban biodiversity.
