Brief: Macro-Financial Stability in a Changing Water System: Evolving Policy and Mandates
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International Water Management Institute
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Human activity is destabilizing the water cycle, turning hydrological disruption into a systemic macro‑financial risk: not only through scarcity, but through persistent spatial and temporal mismatches between water availability and economic activity that erode growth, fiscal capacity, and trade stability. Macro‑financial frameworks underestimate these risks by overlooking green-water systems, storage dynamics, and interconnections; as ecohydrological buffers degrade, economies enter a “long emergency” in which weakening natural systems quietly undermine debt sustainability, inflation control, and investor confidence, while amplifying inequality and eroding resilience.
This brief argues that the structural reshaping of the water cycle now demands a re‑specification of macro‑fiscal diagnostics, debt‑sustainability assessments, and international financial instruments (including the International Monetary Fund’s Resilience and Sustainability Facility) around hydrological integrity itself, treating eco-hydrological systems as core productive and protective capital rather than a peripheral environmental concern. Placing water‑cycle stability at the core of macro‑financial governance and aligning finance with the regenerative limits of water systems is essential for resilient and inclusive growth. This brief is the first of two examining the water cycle and finance. The second brief focuses on redirecting investment toward the water cycle.
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hydrological cycle, water scarcity, water availability, infrastructure, economic analysis, financing