The Biofilter & Wetland demonstration site along a drainage channel shows how surface runoff is filtered before flowing into the main lake. The system helps remove pollutants carried from surrounding human activities, protecting the lake’s water quality. Visitors are introduced to the concept of biofilters and learn how wetlands use natural processes to maintain healthy freshwater ecosystems.

This biofilter is made up of three main layers: a filter media layer, a drainage and geotextile layer, and a submerged zone created by a raised outlet pipe. Native wetland plants play an important role by absorbing excess nutrients, trapping sediments and pollutants, and helping the soil retain moisture.

Beyond improving water quality, the area also supports small habitats for aquatic organisms, insects and birds. It demonstrates how nature-based solutions can support sustainable water management, reduce pollution and enhance urban biodiversity.

Flora that can be seen in Biofilter: