コンゴ盆地の洪水と人々の関係に関する複雑な実態を解明(Study reveals nuanced relationship between people and flooding in Congo Basin)

2026-08-25 イェール大学

コンゴ盆地のLac Télé Community Reserveで、人々と季節的な洪水との複雑な関係を民族誌的に調査した研究。Yale大学を中心とする研究チームは、6村で1年間のフィールドワークを行い、約200件のインタビューとフォーカスグループを実施した。その結果、洪水の時期・規模・頻度は村ごとに大きく異なり、住民も水の状態や季節を独自に認識していることが分かった。住民は洪水に適応した生活・資源利用を築いてきたが、近年は洪水期の早期化・長期化・浸水範囲の拡大により、生活、生計、文化、幸福が影響を受けている。特に2000年頃以前には村域まで達する大規模洪水は稀だったとの証言が得られた。研究は、水文学・氾濫原生態学だけでなく環境人類学を統合した「水文化的モザイク」として地域を捉えることが、気候・保全政策に重要だと指摘する。

コンゴ盆地の洪水と人々の関係に関する複雑な実態を解明(Study reveals nuanced relationship between people and flooding in Congo Basin)
A woman and her children traverse a flooded forest channel on their way to clear brush in their agricultural fields. Photo by Katherine Meier

<関連情報>

コンゴ盆地における人間と洪水との微細な関係:ラック・テレ共同体保護区からの民族誌的視点 Fine-scale human–flood relationships in the Congo Basin: ethnographic perspectives from the Lac Télé Community Reserve

Katherine Meier;Milena Beekmann;Tiriel Lokoka Ngoma;Célie-Léoda Moungouya-Moukassa;Bola Madzoke
Philosophical Transactions of the Royal Society B  Published:20 Aug 2026
DOI:https://doi.org/10.1098/rstb.2024.0491

Abstract

The Likouala-aux-Herbes river and surrounding swamp forests of the northern Republic of Congo are described in scientific literature as a wetland forest system characterized by a bimodal flood pulse and widespread seasonal flooding. Recent climatic and hydrological modelling of the Congo Basin and Cuvette Centrale peatlands, moreover, positions the Likouala region as a rain-fed or ombrotrophic peatland. However, human populations experience and adapt to flooding at a more localized scale. This study presents ethnographic data on flooding and seasonality from six villages within the Lac Télé Community Reserve (LTCR), a protected area in the Likouala swamp forest biome and the country’s only Community Reserve. Our findings reveal how spatio-temporally variable flooding produces village-specific cultures, livelihood cycles, adaptations and vulnerabilities—an interconnected gradient of biocultural relationships. Across villages, flood dynamics have changed drastically over the last decades. Climate change, economic transitions and erosion of local knowledge systems are straining long-standing adaptive frameworks within and between LTCR communities. We emphasize the importance of ethnographic data in understanding fine-scale human–environment interactions and suggest that biocultural analysis at this scale—what we term the ‘hydrocultural patch’—is essential for effective landscape governance and policy development in the context of accelerating climate change. A French translation of this abstract is available in the supplementary material.

1206農村環境
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