Attitudes of political-administrative decision makers towards the implementation of nature-based solutions in water management – a case study on a hypothetical constructed wetland in the Tárcoles River basin

Nature-based solutions (NBS) are actions that help communities address social-ecological challenges such as flooding and polluted groundwater. Nevertheless, research shows that in practice, NBS confront several barriers in planning and implementation, many of which are related to the different attitudes of political and administrative actors. There is knowledge missing on their viewpoints on NBS. We used Q-methodology to explore the attitudes towards the implementation of a constructed wetland as NBS, interviewing decision-makers from the Tárcoles River Basin Commission in Costa Rica, the administrative body in charge of the integrated management of the river. We determined three recognizable viewpoints: 'the nature lover', 'the cost concerned', and 'the participation seeker'. Although all members of the commission shared a common vision, it was clear that their priorities differed. Regarding the ways of implementing NBS, interviewees agreed that the country urges a paradigm shift in policy design towards ecosystem-based approaches and emphasized the need for more cooperation among bodies of administration in river basin decision-making. We reflect on the lessons learned to improve planning and implementation of NBS, such as the importance of increasing knowledge and awareness of NBS, the support from all governance levels as well as the cooperation of researchers and policy-makers, and the consideration of NBS financing by private companies.