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<p> Urban Green Infrastructure (UGI) is increasingly recognized as vital for sustainable urban development due to the ecosystem services it provides. Using 2023 data, this study employed I-Tree Canopy 7.1 to evaluate traditional gardens in Qazvin Province (~2,500 ha) in terms of their ecosystem services and economic value. The results indicate substantial air pollution reduction, with ozone being the most removed pollutant (151.45 tons annually) and carbon monoxide the least (2.79 tons annually). The gardens also contribute significantly to carbon sequestration and storage, with 30.96 kilotons of CO₂ sequestered annually (valued at $1,440,054) and 777.51 kilotons stored in total (valued at $36,165,161). In water management, the vegetation helps control surface runoff, preventing 3.2 thousand gallons per square mile each year (valued at $29). While the economic value of runoff reduction is modest, it represents a key ecosystem service; broader benefits such as flood mitigation and water quality improvement are not fully captured by the model. These findings demonstrate the measurable benefits of UGI and offer guidance for optimizing urban green spaces to enhance environmental performance.</p>

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Investigating the benefits of green infrastructure using i-Tree canopy software: A case study of the 2500-year gardens of Qazvin

  • 期刊论文

  • 发表日期：

    2026年2月6日

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  • Mina Rahmani,
  • Mohammad Mehdi Zarrabi,
  • Javad Imani Shamloo,
  • Sama Abdollahi Milani

摘要

Urban Green Infrastructure (UGI) is increasingly recognized as vital for sustainable urban development due to the ecosystem services it provides. Using 2023 data, this study employed I-Tree Canopy 7.1 to evaluate traditional gardens in Qazvin Province (~2,500 ha) in terms of their ecosystem services and economic value. The results indicate substantial air pollution reduction, with ozone being the most removed pollutant (151.45 tons annually) and carbon monoxide the least (2.79 tons annually). The gardens also contribute significantly to carbon sequestration and storage, with 30.96 kilotons of CO₂ sequestered annually (valued at $1,440,054) and 777.51 kilotons stored in total (valued at $36,165,161). In water management, the vegetation helps control surface runoff, preventing 3.2 thousand gallons per square mile each year (valued at $29). While the economic value of runoff reduction is modest, it represents a key ecosystem service; broader benefits such as flood mitigation and water quality improvement are not fully captured by the model. These findings demonstrate the measurable benefits of UGI and offer guidance for optimizing urban green spaces to enhance environmental performance.