PlatformAction Platform for Source-to-Sea Management (S2S Platform) - hosted by IUCN

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 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.

Important changes to the S2S Platform

Since 1 January 2025, The Action Platform for Source-to-Sea Management (S2S Platform) is hosted by IUCN. These pages are no longer updated. They are a legacy from when SIWI hosted the S2S Platform between 2014 and 2024.

For the most updated information about the S2S Platform:

Website

LinkedIn page

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.

Our Mission

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 Vision

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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Platform Strategy 2021-2025

The strategy focuses the activities of the Platform partners on four strategic areas needed to achieve the Platform’s mission and make progress toward its shared vision.

Download the strategy

Progress Reports for 2022

This report is organized along the lines of the 2021–2025 Strategy and conveys a growing momentum for the Platform, with key advances in the engagement of new partners and the participation in important global forums.

Download the 2022 Progress Report

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Taking action: Source-to-sea case studies from around the world

This selection of case studies shared by partners and friends of the Action Platform for Source-to-Sea Management (S2S Platform) highlight lessons learned during the implementation of source-to-sea management to accelerate source-to-sea action.

EXPLORE

Why Source-to-Sea management

Source-to-sea management recognizes that the linkages from land, to freshwater, the coasts and the ocean,

DISCOVER

What we do

The Source-to-Sea platform supports the adoption and implementation of a source-to-sea approach to management at regional, national, and sub-national levels.

LEARN