The Green Area Ratio: Nature-Based Solutions Regulation in Washington DC
グリーンエリア比：ワシントンDCにおける自然基盤ソリューション規制 (AI 翻訳)
Melissa Keeley, Andrea Herrera Krug, Nils Berglund, Connor Wolosewicz, Ali Sorrels
🤖 gxceed AI 要約
日本語
本研究は、ワシントンDCのグリーンエリア比（GAR）という性能ベースのゾーニング規制を、2015年から2025年までの1329物件の承認データを用いて実証評価した。約184ヘクタールの自然基盤ソリューション（NBS）が承認され、植栽や樹木が中心で、BMPの選択はゾーニング地区や敷地特性に影響された。GARは雨水管理要件とは異なる影響を与え、そのシンプルさと柔軟性が他都市へのモデルとなることを示唆する。
English
This study empirically evaluates Washington DC's Green Area Ratio (GAR), a performance-based zoning regulation for nature-based solutions (NBS), using approval records from 1,329 properties (2015-2025). Approximately 184 hectares of NBS were approved, mainly landscaping and tree planting, with BMP selection varying by zoning district and parcel characteristics. GAR influenced BMP selection differently than stormwater requirements, suggesting its simplicity and flexibility make it a versatile model for other cities.
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
日本では、生物多様性やグリーンインフラの推進が進む中、性能ベースのゾーニング規制は参考になる。ただし、日本の規制は国主導で異なるため、自治体レベルでの適用可能性が焦点となる。
In the global GX context
This paper contributes to global discourse on nature-based solutions and performance-based regulation, offering empirical evidence on how such policies can be implemented and adapted. It provides a model for cities worldwide seeking to integrate NBS into urban planning, aligning with international biodiversity and climate goals.
👥 読者別の含意
🔬研究者:Provides empirical evidence on the effectiveness and implementation of performance-based zoning for NBS, useful for urban sustainability research.
🏢実務担当者:Offers insights for urban planners and sustainability teams on designing flexible NBS regulations, applicable to corporate green infrastructure projects.
🏛政策担当者:Demonstrates a successful regulatory model for promoting NBS, relevant for policymakers developing urban sustainability policies.
📄 Abstract（原文）
Nature-Based Solutions (NBS) have emerged as a key strategy to address complex and intensifying urban sustainability challenges, yet empirical assessments of regulatory frameworks that operationalize these strategies remain limited. This study addresses that gap through an empirical evaluation of the Green Area Ratio (GAR), a hybrid performance-based zoning regulation for sustainable landscapes in Washington, DC, using more than a decade of regulatory implementation data. Regulatory plan approval records from 1329 private properties subject to GAR between 2015 and 2025 were analyzed to examine trends in landscaping Best Management Practice (BMP) selection, relationships with parcel characteristics, and interactions with stormwater management requirements. Over this period, approximately 184 ha of multifunctional NBS were approved through GAR plans primarily consisting of landscaping areas, plantings, and tree planting and preservation, often combined through BMP stacking and amplified by a native plant bonus. BMP selection varied significantly according to zoning district, lot area, and GAR Score Requirement. Importantly, GAR requirements influenced BMP selection differently than stormwater requirements. The findings suggest that simplicity, flexibility, and adaptability of the GAR make the regulation a versatile policy instrument for DC and a useful model for cities seeking to expand NBS through performance-based zoning regulation.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.3390/su18168179first seen 2026-08-12 04:52:25
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