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Exploring key characteristics of performance indicators for green infrastructure assessment
Bardia Roghani1, Mahdi Bahrami2, Frédéric Cherqui3
1Norwegian University of Life Sciences, Institute of Civil and Environmental Engineering, Water and Environmental Engineering, Ås, Norway; Norwegian University of Science and Technology (NTNU), Department of Civil and Environmental Engineering, Water and wastewater engineering (VA) group, Postbox 7491, Trondheim, Norway.
The Science of the Total Environment
|February 28, 2025
Summary
Green infrastructures (GIs) offer significant benefits. This study evaluated 41 performance indicators (PIs), finding 18 ready for use and recommending international standards for 23 others to improve GI project outcomes.
Area of Science:
- Environmental Science
- Urban Planning
- Sustainability Studies
Background:
- Green infrastructures (GIs) are increasingly vital for their economic, societal, and environmental benefits.
- Performance indicators (PIs) are essential for evaluating GI effectiveness, guiding decisions, and optimizing resource allocation.
Purpose of the Study:
- To evaluate 41 recommended PIs for green infrastructures.
- To assess the interpretability, scope, and measurability of these PIs.
- To identify gaps in current GI assessment guidelines and advocate for improvements.
Main Methods:
- Reviewed 41 PIs from common GI assessment guidelines.
- Assessed the availability of interpretative standards for PI values.
- Defined metrics for scope of application and measurability to gauge usefulness and resource needs.
Main Results:
- Identified a need for international standards for 23 PIs; 18 PIs are currently ready for use.
- 85% of PIs have an intermediate or broad scope, applicable across diverse GI types and scales.
- Over half of PIs require moderate to substantial resources for data collection, varying by calculation method.
Conclusions:
- Recommends integrating PIs with clear interpretative standards into existing GI assessment guidelines.
- Advocates for developing international standards for PIs lacking them.
- Improved GI asset management and optimized resource allocation are expected outcomes.
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