What happens to stormwater runoff when rainwater harvesting is implemented?

When rainwater harvesting is implemented, stormwater runoff is reduced. This practice involves collecting and storing rainwater from surfaces such as rooftops for later use, decreasing the volume of water that would otherwise flow directly into stormwater systems or natural waterways.

By capturing rainwater, less runoff is generated, which can help mitigate flooding, reduce erosion, and lower the risk of water quality issues associated with high volumes of stormwater. Additionally, by decreasing the amount of unfiltered water that enters drainage systems, rainwater harvesting can contribute to a more sustainable management of water resources, helping to recharge groundwater supplies and maintain local water levels.

This reduction in stormwater runoff can significantly alleviate the pressure on existing drainage systems, which can lead to better water management practices in urban areas, reducing potential surface runoff problems and improving overall water quality.