Guidance Note for the Implementation of Source-to-Sea Management in Transboundary Basins

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The Guidance Note for the Implementation of Source-to-Sea Management in Transboundary Basins addresses a pressing global need: the integrated management of land, freshwater, coastal and marine ecosystems – particularly where these cross-national boundaries.

This publication offers a clear, practical roadmap for applying source-to-sea thinking in transboundary contexts. It provides tools and recommendations to foster stronger cooperation between upstream and downstream actors, improve ecosystem resilience, and align natural resource management across sectors and borders. By emphasizing the vital connections between land, rivers, lakes, aquifers, coasts and the ocean, it paves the way for more holistic and sustainable governance frameworks – promoting sustainable development, stability and peace.

Designed for government officials, river basin authorities, regional seas commissions and technical practitioners, this guidance is especially valuable for those managing shared waters and interconnected ecosystems such as deltas, estuaries and marine areas.

The Guidance Note was developed within the framework of the Water Convention, under the leadership of Estonia, Panama and Slovenia. The process was supported by a lead author, the Water Convention Secretariat, and a drafting group, reflecting a collaborative effort. It stands as both a call to action and a practical tool for those committed to transforming how we manage our most critical natural systems.