気候変動による地表水不足による国境を越えた紛争

Ruijie Jiang¹, Hui Lu^2,3,4, Deliang Chen^1,5

¹Department of Earth System Science, Institute for Global Change Studies, Tsinghua University, Beijing, China.

Nature communications

|September 1, 2025

まとめ

国境を越えた河川の流域は水不足の紛争に直面しています積極的な協力が将来のリスクを大幅に減らすことができると示しています.

科学分野:

環境科学
気候変動への適応
水資源管理

背景:

国境を越えた河川流域は,需要の増加と気候変動により,水不足による紛争にますます脆弱になっています.
TRBにおける水不足と紛争の関係を理解することは効果的な緩和戦略の開発に不可欠です

研究の目的:

水不足による紛争のリスクのあるTRBを予測するための新しい枠組みを導入する.
今後数十年で世界規模で水不足がもたらす影響を評価する.

主な方法:

月間水不足によって定義される水依存性に基づく予測枠組みを開発した.
2005年から2014年の過去のデータを用いて枠組みを検証した.

主要な成果:

この枠組みは,水不足による紛争を経験しているTRBの80%以上をうまく説明しています.
予測によると干渉なしでは 2041年から2050年までに世界のTRBの40%近くが水不足の紛争に直面する可能性があります
アフリカ,アジア,中東,北米で紛争が起こりうる地域が特定されています.

結論:

流域内での協力を促進するには,緊急の投資と利害関係者の関与が必要です.
積極的な措置,特に盆地内での協力により,脆弱なTRBの割合を10%未満に減らすことができます.

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