C297-2023

Background

The incorporation of artificial grass into outdoor spaces carries with it notable
implications for drainage systems, ushering in a set of distinctions when compared to
the drainage characteristics inherent in natural grass landscapes. This demarcation is
multifaceted, encompassing factors ranging from water absorption to surface runoff
dynamics. Delving into these distinctions provides valuable insights for property owners and the city seeking to make informed decisions about the integration of artificial turf. Artificial grass typically has a more impermeable surface compared to natural grass.

Rainwater is more likely to run off the surface rather than being absorbed into the ground. The installation of artificial grass often involves a compacted sub-base, which can further reduce water absorption into the soil. This can potentially contribute to increased surface runoff. Proper installation of artificial grass includes incorporating drainage systems such as perforated pipes or a permeable base to allow water to drain away. However, the effectiveness of these drainage systems can vary based on installation quality.

Natural grass has a more permeable surface, allowing rainwater to be absorbed into the soil. The grass roots and soil structure help with water retention and gradual release. Natural grass can help reduce surface runoff by absorbing and slowing down the movement of water. This is beneficial for preventing soil erosion and promoting
groundwater recharge

Source: City of Toronto

Item Description

Proposed by

Regional Councillor Palleschi