The source-to-sea approach recognizes that what we do on land and in rivers, lakes and aquifers can have impacts further downstream, along coasts and in the ocean. By taking these linkages into account, the approach applies a holistic view of the source-to-sea system, which will result in greater benefits for the entire system.

The Action Platform for Source-to-Sea Management (S2S Platform) is a multi-stakeholder initiative to exchange and generate knowledge, and support joint action for improved management of land, water, coastal and marine linkages. The S2S Platform strengthens partnerships between sectors and expands the understanding of source-to-sea challenges and of the solutions that will lead to sustainable development. It builds commitment so that policies and finance stimulate source-to-sea action on the ground.

The S2S Platform is open to organizations committed to holistic management of land, freshwater, coasts and the ocean. The Platform Secretariat is hosted and coordinated by Stockholm International Water Institute (SIWI).

Our vision

We envision a world in which land, fresh­water, coastal and marine resources are managed holistically, balancing benefits for the environment, communities and economy from source to sea.

Our mission

We want to enable sustainable development across the land-freshwater-marine continuum through supporting the adoption and implementation of a source-to-sea approach to management at regional, national, and sub-national levels.

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Source2Sea Platform

This is S2S Platform

The Action Platform for Source-to-Sea Management is a network of organizations committed to promoting, implementing, and building expertise on source-to-sea management.

About the Platform


The S2S platform is funded by:

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Government of Sweden
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Government of the Netherlands