The simulations of the impact of MAR on local hydrological systems will be amended by observations about the environmental status harvested with the help of a citizens’ science portal. The portal will allow members of the general public to get an active participatory role in the project and contribute to the achievement of general objectives. The activities will include for example collecting observations about the natural fluctuations of groundwater levels in urban wells, spatial and temporal assessment of stream flows and their water quality, rainfall data etc. The project consortium will design several specific activities where local communities can engage and contribute to the planning of a MAR project. This will be used for refining the assessment of the general criteria for MAR implementation such as water demand in the study area, available water sources (quantity and quality), local hydrogeological characteristics etc. The assignments will be introduced to the wide audience through online tutorials as well as flyers, brochures and during field trips and meetings with community leaders. The local knowledge of vulnerable groups (such as tribal minorities, subsidence farmers etc.) will be embedded in the conceptualisation of the tasks and given increased attention.