Within the BlueHealth project, funded under the Horizon 2020 European Union research framework, a number of targeted experimental design interventions were used to test the effect and impact of planning and design on encouraging people to use various blue spaces. Complex interventions were implemented and evaluations before and after each were made using a set of tools which triangulate with each other—a site assessment tool, a behaviour observation tool, a questionnaire survey (including an economic evaluation) and qualitative interviews. The theoretical basis for the research is that of affordances, and the projects each involved modest changes to the landscape using the approach of “urban acupuncture” where a small intervention can potentially have an effect out of all proportion to the investment. This paper is a protocol paper and describes the research strategy and methodology in detail for one of the intervention sites, located in Plymouth in the UK. The aim is to present the methodology as a whole so as to act as (a) a reference framework for the results of all the projects which will be reported separately in a series of research articles once all the results are in and analysed and (b) a useful reference for other researchers wishing to carry out such complex projects and where a comprehensive presentation of the strategy and methodology is unavailable. We offer this protocol for reference, for critique and for inspiration to those following us.

Urban blue infrastructure is an important component of the urban landscape for ecological, economic, social, and cultural reasons. However, there is a clear research gap in relation to preferences and patterns of use in the context of different blue spaces, considering the citywide context and different cultural and geographical settings. Additionally, when compared to green spaces, the location and morphology of urban blue elements are usually geographically predefined, and it is much less possible to ensure their equitable distribution with respect to population. To fill this gap, we decided to explore the effect of distance from residential areas, the role of water, the level of facilities, and the character of blue spaces in attracting visitors of different demographic characteristics in a sample of different European cities. We used a public participatory geographic information system approach (PPGIS) to collect data about residents’ favourite blue spaces in each city and categorize the most popular of these according to whether they were close to or distant from respondents’ homes. We also categorized the types of blue spaces and the level of facilities present. The results show that certain key blue spaces, such as the seaside or beaches, attract more distant visitors and that the pattern of the blue spaces within the city also affects visitation. There are many differences among the studied cities due to the morphology determined by geography. The usage of blue spaces is very site-specific and should be studied in more detail at the city and place levels, focusing on the different roles of everyday and destination places.

Within the BlueHealth project, funded under the Horizon 2020 European Union research framework, a number of targeted experimental design interventions created in virtual reality (VR) were used to test the effect and impact of planning and design on encouraging people to use various blue spaces. A set of designs in three different coastal landscape types—a cliff/steep slope; a sandy beach and an area of reed beds—located in Tallinn, Estonia, were used as the sites for nine different intervention designs. The designs were based on a combination of the site features and inspirations from solutions found in different locations internationally. Using 3D modelling and a Virtual Reality system, a set of nine videos, one to depict each intervention, was created and shown to a quota sample of 252 Estonian residents. Respondents were asked a set of questions associated with each option. The results were analysed statistically and qualitatively. The results uncovered key preferences for designs and revealed differences among age groups and the levels of personal interconnection with nature. However, there were problems associated with the interpretation and understanding of some of the options by some of the people due to the degree of realism of the VR representations, which may have affected the results. The project shows that VR could be a useful tool for testing design ideas as part of public participation approaches but that care is needed in ensuring that viewers understand what they are assessing.