Implementation of Carbon Emission Disclosure (CED) in Hydroelectric Power Plants in the Sumatra Region
スマトラ地域の水力発電所における炭素排出開示（CED）の実装 (AI 翻訳)
Rafiqah Humaira, M. Nasution, E. R. Gustarina
🤖 gxceed AI 要約
日本語
本研究は、スマトラ地域の5つの水力発電所におけるライフサイクルアセスメント（LCA）に基づく炭素排出量を算出し、排出開示（CED）の現状評価と統合MRVモデルを提案。排出原単位は33.7～85.3 g CO₂e/kWhで、世界中央値の2倍以上。貯水池からのメタン・CO₂排出が総排出の38～67%を占める。CED指数は平均0.32と低く、統合的開示が不足している。
English
This study calculates life-cycle carbon emissions for five hydropower plants in Sumatra using LCA, with emission intensities ranging from 33.7 to 85.3 g CO₂e/kWh—more than double the global median. Reservoir CH₄ and CO₂ contribute 38–67% of total emissions. The average Carbon Emission Disclosure (CED) index is 0.32 (scale 0-1), far below adequate, and an integrated MRV model is proposed and validated.
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
日本の水力発電事業においても、貯水池からのメタン排出は過小評価される可能性があり、本論文のMRVフレームワークは国内の小水力・ダム式発電所の開示強化に参考となる。SSBJや有報での排出量開示が進む中、検証可能なLCAベースの排出原単位の重要性が示唆される。
In the global GX context
This paper provides critical empirical evidence that tropical reservoir hydropower can have significantly higher GHG intensities than commonly assumed, reinforcing the need for robust MRV frameworks in carbon disclosure. It challenges the notion that all hydropower is automatically low-carbon, which is relevant for ISSB/TCFD-aligned reporting and green bond evaluation globally.
👥 読者別の含意
🔬研究者:Empirical LCA emission factors for tropical hydropower, useful for carbon accounting models and disclosure research.
🏢実務担当者:Highlights the need for verified emission disclosure in hydropower operations, potentially impacting green certification and reporting.
🏛政策担当者:Indicates that existing carbon disclosure frameworks for hydropower may be inadequate; MRV model could inform national GHG inventories and disclosure standards.
📄 Abstract（原文）
Hydroelectric Power Plants (PLTA) are often categorized as clean energy, but scientific literature shows that hydroelectric power plants, especially reservoir based ones in tropical regions have the potential to produce significant greenhouse gas (GHG) emissions through submerged biomass decomposition, infrastructure construction, and long-term operation and maintenance. This study aims to calculate carbon emissions based on Life Cycle Assessment (LCA) at five hydroelectric power plants in the Sumatra region (Singkarak, Maninjau, Koto Panjang, Asahan 1, and Batang Agam), assess the existing condition of Carbon Emission Disclosure (CED) practices, and design an integrated CED implementation model with a Measurement, Reporting, and Verification (MRV) framework. The approach used is quantitative-descriptive with cradle-to-grave system limits according to ISO 14040/14044, using a functional unit of 1 kWh of electricity generated. The results show that the life cycle emission intensity of the five hydropower plants ranges from 33.7 to 85.3 g CO₂e/kWh with a weighted average of 52.4 g CO₂e/kWh more than double the global median of 24 g CO₂e/kWh for hydropower plants. Reservoir emissions (CH₄ and CO₂ decomposition) account for 38–67% of total emissions at reservoir-type hydropower plants, making them a hotspot for underreported emissions. The existing CED assessment showed an average CED Index of 0.32 (scale 0–1), well below the “adequate” threshold (≥0.70), indicating that none of the sampled hydropower plants have an integrated and verified emissions disclosure system. The developed CED-MRV model was successfully validated on 4 out of 5 hydropower plants (80%), exceeding the 70% target, and is recommended as a standard for replication for other hydropower plants in Sumatra.
🔗 Provenance — このレコードを発見したソース
- semanticscholar https://doi.org/10.70610/jcpa.1378first seen 2026-06-16 05:19:38
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