This project shows our innovative wetlands and waterways services as we implemented aerial drone spraying with on-water treatment methods to manage widespread aquatic weeds across Penrith Lakes. This resulted in controls of infestations whilst improving waterway health and accessibility across the site.

Skill sets used:

• Aquatic Weed Treatment
• Broadscale Herbicide Spraying
• Drone Technology Aerial Spraying

Project Outcomes:

Our team conducts targeted treatment of aquatic weeds, including Salvinia molesta, Ludwigia longifolia, and Alternanthera philoxeroides, by integrating aerial and on-water control methods. For primary works, we engaged specialist contractors to operate drone aerial spraying, enabling precise and efficient application over extensive or difficult-to-access areas. Follow-up and maintenance treatments were carried out using chemical spray boat, which is equipped with a three-boom spray set-up, allowing for spray widths between 4 and 10 meters per pass. This method is particularly effective for managing Salvinia molesta infestations in open water and targeting aquatic weeds that are inaccessible from the embankment or via road and foot access.

Follow-up with chemical spray boat	Maintenance phase

Before	After