Global Water Partnership (GWP) guidelines for effective shared watercourse management. Synthesises international experience in transboundary water governance, drawing on case studies from river basin organisations worldwide. Covers: IWRM principles in the transboundary context, institutional models for shared watercourse management (advisory committees, authorities, commissions), legal and regulatory frameworks, benefit-sharing approaches (moving beyond volumetric allocation to optimising basin-wide benefits), stakeholder engagement and public participation mechanisms, data and information management systems, financing transboundary cooperation, conflict prevention and resolution mechanisms, and climate change adaptation in shared basins. Provides practical tools including institutional assessment frameworks, stakeholder analysis matrices, and benefit-sharing evaluation criteria.