The New South Wales National Parks and Wildlife Services (NPWS) engaged Cardno in May 2019 to carry out Geotechnical Landslide Risk Assessment for a proposed track located in the Murramarang National Park on the NSW South Coast. Cardno used remotely piloted aircraft to assist with a geotechnical risk assessment of hazardous cliffline areas for three proposed upgrades to walking trails in the National Park. The scope of works included summarising coastline geology, completing a geotechnical risk assessment and making recommendations to NPWS regarding the proposed track location.
The project comprised a desktop assessment, remotely piloted aircraft survey and targeted geotechnical mapping based on the results of the aerial survey. The aerial survey was completed using a DJI Inspire multi rotor platform to safely and efficiently capture 3D photogrammetry and point cloud data to develop detailed models of the coastline along the proposed walking track alignments.
This methodology enabled access to areas of coastline and rock platforms that were inaccessible on foot or impossible to see from alternate vantage points.
The images and models derived from the aerial survey were invaluable to providing a comprehensive baseline of the status of the cliff line.