Where the waters meet: Connecting global limits and river basin management

Human activity and climate change are exerting increasing pressure on water resources, disrupting the predictability of the water cycle and altering the availability and quality of freshwater. Researchers at IIASA have developed a new framework to guide water management and planning at the river basin level, based on the Global Water Planetary Boundary.

This framework identifies limits for key Earth system components that maintain a stable and safe environment for human life, with freshwater being one of these crucial components. The Global Water Planetary Boundary framework highlights the impacts of human activity on the global water cycle but lacks actionable strategies for implementation at the river basin level.

To address this gap, the IIASA researchers created a basin-scale Safe Operating Space (SOS) framework for water resources, focusing on key water functions crucial for both people and the Earth system. This new approach can help prevent local water overuse from escalating into broader problems with cascading effects at regional and global scales.

The framework is adaptable to any river basin worldwide and can evaluate the basin's management appropriateness under various conditions, including climate change and different management decisions, while considering local stakeholder needs and values. By involving local communities in planning, the framework ensures their needs and priorities are reflected in water sharing and management decisions.

The framework provides a structured, integrated, and adaptable decision-support tool for river basin authorities, water managers, policymakers, and environmental agencies to evaluate trade-offs, design resilient long-term adaptation plans, and balance socioeconomic development with ecological limits and legislative requirements.