持続可能なインフラ改修に向けた内包GHG排出の輸入エクスポージャー評価：マドリード地下駐車場の産業連関分析ケーススタディ
Screening the Import Exposure of Embodied GHG Emissions to Support Sustainable Infrastructure Rehabilitation: An Input–Output Case Study of an Underground Car Park in Madrid (原題)
Lounis Djenaoucine, Cristina Cabrerizo Navarro, Jaime Carlos Gálvez, Amparo Moragues, Pedro Luis Calvo Gómez, Gonzalo Fernández Sánchez
🤖 gxceed AI 要約
日本語
マドリードの地下駐車場改修（909万ユーロ）を対象に、621の積算項目をスペイン産業連関表へマッピングし、内包GHG排出と輸入由来分を推計した。基準シナリオで3325 tCO2eq（399 kgCO2eq/m2）、うち36.5%が輸入エクスポージャー。非金属鉱物製品が43%を占め、多地域分析ではDTAが輸入排出を約1.8倍過小評価する可能性を示す。公開統計と予算のみで使える低コスト手法を公共調達者に提供する。
English
Using environmentally extended input–output analysis, this study screens embodied GHG emissions and import exposure for a EUR 9.09M underground car park rehabilitation in Madrid, mapping 621 BOQ items to Spain's 2022 IO tables. The reference footprint is 3325 tCO2eq (399 kgCO2eq/m2), 36.5% import-exposed, with non-metallic minerals at 43%. A multiregional check suggests the domestic technology assumption understates import emissions ~1.8x, offering contracting authorities a low-cost screening tool from public statistics and budget data alone.
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
建設・公共調達のScope 3算定はSSBJやサプライチェーン排出開示の実務課題。積算書と公開統計のみで輸入由来排出をスクリーニングする手法は、日本の自治体・発注者のScope 3把握やグリーン公共調達の高度化に示唆を与える。
In the global GX context
Embodied emissions in construction and public procurement are a growing focus under CSRD/Scope 3 and green public procurement rules. The paper's low-cost, BOQ-based screening of import exposure offers a replicable method for contracting authorities and adds to disclosure scholarship on supply-chain carbon accounting.
👥 読者別の含意
🔬研究者:産業連関分析とDTA仮定の限界、輸入エクスポージャー指標の構築法を学べる。
🏢実務担当者:積算書と公開統計から建設改修のScope 3・輸入由来排出を低コストで概算できる。
🏛政策担当者:グリーン公共調達の入札要件に内包炭素・輸入エクスポージャー指標を組み込む根拠になる。
📄 Abstract（原文）
Extending the service life of existing infrastructure is central to sustainable construction, but the embodied greenhouse gas (GHG) emissions of rehabilitation projects, and the share tied to imported supply chains, are rarely screened reliably because bills of quantities (BOQs) are heterogeneous and product-specific data are incomplete. This study screens both for the EUR 9.09 million rehabilitation of the Montalbán underground car park (Madrid) using environmentally extended input–output analysis. The 621 BOQ items were mapped to Spain’s 2022 input–output tables at basic prices, with final demand split into domestic and imported products; the domestic and total Leontief inverses separate domestic emissions from an import-exposure indicator under the domestic technology assumption (DTA). In the reference scenario, which removes the overlap between construction services and itemized materials, the footprint is 3325 tCO2eq (399 kgCO2eq/m2 of gross area; Monte Carlo 5th–95th percentiles 3058–3967 tCO2eq), of which 36.5% is import-exposed (35.6–36.5% across the four scenarios). Non-metallic mineral products account for 43% and seven components for 48%; a multiregional check suggests that the DTA understates import-related emissions by a factor of about 1.8. Based only on public statistics and the budget, the procedure gives contracting authorities a low-cost tool to target product-level data and sustainable public procurement.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.3390/su182111247first seen 2026-11-06 05:03:07
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