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都市の青緑空間へのアクセスの公平性とアクセシビリティ改善に向けた、高密度都市域への自然基盤ソリューション統合のスケール不変フレームワーク

A scale-invariant framework for integrating nature-based solutions into dense urban areas to improve accessibility and equity of access to urban blue and green spaces (原題)

Yangzi Qiu, Daniel Schertzer, Ioulia Tchiguirinskaia

Ecological Indicators📚 査読済 / ジャーナル2026-10-23#生物多様性Origin: EU対象セクター: real_estate
DOI: 10.1016/j.ecolind.2026.115767
原典: https://doi.org/10.1016/j.ecolind.2026.115767

🤖 gxceed AI 要約

日本語

パリを事例に、Universal Multifractal理論に基づくスケール不変フレームワークを構築し、小規模分散型の自然基盤ソリューション（NBS）を既存の都市青緑空間（UB&GS）へ統合する手法を提示した。フラクタル次元とジニ係数を指標とし、NBS統合によりアクセシビリティが向上（フラクタル次元最大+0.07）、空間的公平性も改善（ジニ係数最大-0.27）することを示した。高密度都市域でのNBSの持続可能な展開に定量的な指針を与える。

English

Using Paris as a case study, the authors develop a scale-invariant framework based on Universal Multifractal theory to integrate small-scale Nature-Based Solutions (NBS) into existing urban blue and green spaces across spatial scales. Fractal dimension and the Gini index serve as indicators of accessibility and spatial equity. NBS integration raises fractal dimension by up to 0.07 and lowers the Gini index by up to 0.27, indicating improved accessibility and greater spatial equity, offering quantitative guidance for sustainable NBS deployment in dense urban areas.

Unofficial AI-generated summary based on the public title and abstract. Not an official translation.

📝 gxceed 編集解説 — Why this matters

日本のGX文脈において

都市の生物多様性・適応策はTNFDや生物多様性保全の文脈で日本企業の不動産・都市開発部門にも関連しうるが、開示制度やGX政策との直接の接続は薄い。

In the global GX context

Adds a quantitative, scale-invariant method to the urban nature/biodiversity and adaptation literature relevant to TNFD-aligned nature assessments, though it does not engage disclosure frameworks directly.

👥 読者別の含意

🔬研究者:マルチフラクタル理論を都市緑地の公平性評価へ応用する分析手法として参考になる。

🏢実務担当者:都市開発・不動産の緑地計画において、アクセス公平性を定量評価する指標として活用しうる。

🏛政策担当者:高密度都市でのNBS配置を公平性の観点から最適化する都市計画・緑地政策の参考になる。

📄 Abstract（原文）

Improving accessibility and spatial equity of access to Urban Blue and Green Spaces (UB&GS) could potentially benefit biodiversity and urban sustainability. Nature-Based Solutions (NBS), serving as small-scale decentralised forms of UB&GS, can enhance both environmental quality and human well-being by fostering positive interactions between humans and the natural environment. While there is growing interest in assessing the spatial distribution of UB&GS at multiple scales, existing evaluations commonly examine each spatial scale separately. Consequently, the intrinsic scaling relationships of UB&GS and the potential of NBS integration to improve accessibility and spatial equity of access across scales remain insufficiently explored. To address this gap, this study develops a scale-invariant framework based on Universal Multifractal (UM) theory to support the integration of NBS into existing UB&GS across various spatial scales, using Paris as a case study. Then, the fractal dimension ( D F ) and Gini index are employed as indicators to assess the effectiveness of NBS in enhancing accessibility and spatial equity of access to UB&GS, respectively. The results demonstrate that the developed scale-invariant framework can effectively support the optimal integration of NBS into the current UB&GS. With NBS integration, the D F increases by up to 0.07, while the Gini index decreases by a maximum of 0.27 across the study areas, indicating improved accessibility and enhanced spatial equity of access. Overall, the scale-invariant framework developed in this study provides quantitative recommendations to support the sustainable deployment of NBS in highly urbanised areas.

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