Climate change and unsustainable water management practices are driving the world beyond water scarcity. Many areas in arid and semi-arid regions such as the Middle East, Central Asia, and Southern Africa are moving into an era of “water bankruptcy”. Shared aquifers and river systems are under growing pressure from reduced rainfall, accelerated glacier melt, and upstream interventions, intensifying competition for already limited resources. Moreover, many inland terminal lakes, such as the Aral Sea, Lake Chad and Lake Urmia, are drying up, further exacerbating the environmental and socio-economic impacts of the water crisis. In addition, gaps in data availability and technical capacity hinder effective water governance, making transboundary cooperation even more critical for regional stability and sustainability. To address these challenges, a holistic approach is required - one that integrates the Water-Energy-Food-Ecosystem (WEFE) Nexus to foster benefit-sharing between riparian states. By recognising the interdependencies among water resources, energy production, and food security in relation to environmental needs, WEFE Nexus studies offer valuable strategies for optimising resource allocation, reducing competition, and encouraging cooperative solutions across borders.
Furthermore, ongoing digitalisation, AI and real-time monitoring, and advances in data-driven decision-making, including Digital Twin technologies, offer opportunities to bridge data gaps and improve water management. As water demand grows across urban, industrial, and environmental sectors, innovative solutions are needed to enhance efficiency, minimize losses, and build climate resilience. Alongside technological solutions, human capacity building plays a central role in addressing these complex challenges.