In 2012 the Dutch High-Water Protection Programme (HWPP) was initiated. This programme prioritised dike strengthening projects for the near future with a yearly budget of around 350 million Euros. A safety assessment 2011–2013 indicated the need to strengthen 748 km of dikes. To achieve this, it was recognised that generation and dissemination of state-of-the-art-knowledge was necessary. For this purpose, four Spatial and Technical Research Projects (STRPs) were initiated. The challenge for these STRPs is to generate and disseminate the developed knowledge that is relevant for other dike strengthening projects within the HWPP. This paper examines whether the STRPs have successfully undertaken activities to generate and disseminate new knowledge to relevant stakeholders. We examine how the generation and dissemination of knowledge from the STRPs to the HWPP-projects and water management organisations in the Netherlands took place and might be further facilitated.

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The increasingly active role of stakeholders in the development of innovative nature-based solutions calls for appropriate instruments to support and realise added value from their involvement. In this paper we apply a newly developed instrument “Cooperation for Added Value” (Co-Add) to a study area on the Dutch coast. The instrument draws on participatory game theory and policy analysis to provide a theoretically sound structure for facilitating interactions aimed at identifying shared opportunities and potential coalitions for cooperation. The application in the case study Noard-Fryslân Bûtendyks affirmed that the Co-Add instrument systematically facilitated stakeholders in exploring potentially promising opportunities and gaining insight in the added value of engaging in diverse cooperations. Stakeholders came to understand which solutions were more achievable than others and what was needed to enable implementation in terms of collaboration, including the role of their own organization. Furthermore, social dilemmas in which a particular nature-based solution is attractive to a coalition of stakeholders but is not the most beneficial solution for a particular individual stakeholder, became clear. This represents a practical contribution to the range of participatory instruments that can be applied in societally challenging complex problems that require collaboration for their resolution.@en