Forest monitoring & research
Scientific excellence | Advanced monitoring for sustainable forest management
City Forests employs cutting-edge monitoring and research programmes to ensure our 25,000+ hectare forest estate delivers optimal environmental, economic, and social outcomes. Our comprehensive approach combines traditional forestry science with innovative technology and collaborative research partnerships.
These programmes ensure that our sustainable forest management delivers measurable benefits for the environment, economy, and community while maintaining our position as leaders in forestry innovation and environmental stewardship.
Advanced Growth & Yield Monitoring Programme
Comprehensive Forest Inventory
Our annual forest measurement and monitoring programme demonstrates scientific rigor and precision.
Sample Plot Network
Each year, 400–500 sample plots are inventoried in near-harvest forest stands, with approximately 50 additional plots assessed in mid-rotation stands. Permanent sample plots are remeasured according to established schedules, providing approximately 70% inventory coverage of forest areas older than 20 years, representing 90% of radiata stands measured.
Technology Integration
Mapping is maintained through regular GIS updates using satellite imagery and orthophotography, supplemented by small-scale aerial photography for detailed site analysis. GPS surveys provide precise boundary and infrastructure mapping, while UAV drone footage incorporating lidar enables comprehensive harvest area documentation. Physical yield reconciliation is undertaken for large recently completed harvest units.
Predictive Accuracy Excellence
Since 2001, our harvest volume predictions have been within 3% of actual results, demonstrating the scientific rigor and accuracy of our forest management systems.
Advanced Planning & Modelling Systems
Integrated Forest Planning Technology
Comprehensive estate planning and valuation is supported by Forest Estate Modelling software, alongside proprietary financial models that integrate economic and operational factors. Carbon modelling systems track sequestration and emissions trading obligations, while 90-year planning cycles ensure sustainable production across three rotations. Annual plan revisions incorporate the latest inventory and market data.
Sustainable Yield Calculations
Our planning systems test for long-term sustainable production levels across multiple rotations, age-class distribution optimisation for consistent annual harvest capacity, environmental constraint integration protecting reserves and sensitive areas, and economic optimisation balancing returns with sustainability objectives.
Forest Health & Biosecurity Monitoring
Professional Health Assessments: Annual forest health surveys conducted by SPS Biosecurity Ltd ensure early detection and management.
Current Health Status (2025 Survey Results)
Animal pest damage has been identified in some areas, with ongoing monitoring and management in place. No major health issues have been detected across the estate, and preventive management programmes are maintaining forest resilience. Integrated pest management approaches continue to minimise chemical inputs.
Monitoring Protocols
Forest health is managed through systematic site assessment across all blocks, with species-specific health indicators tracked for major plantation species. Early warning systems are in place for emerging pest and disease threats, supported by rapid response capability for health emergencies.
Clear-Fell Coup Size Monitoring
FSC® Compliance & Environmental Protection: Monitoring clear-fell coup sizes demonstrates our commitment to FSC® principles.
Recent Monitoring Results
Average coup sizes are tracked and reported annually, with environmental impact assessments conducted to evaluate harvesting patterns. Coup sizing is planned to minimise biodiversity impact, while landscape-level planning maintains forest connectivity and supports overall ecosystem health.
