This video (in Arabic with French subtitles) illustrates how to initiate a local participatory approach to groundwater. In Limaoua, in the governorate of Gabès in Tunisia, the participatory approach was based on a design theory known as the C-K (concept/knowledge) theory. This theory allows the identification of innovative solutions to the problem of groundwater degradation and overexploitation. Interviews and several workshops were held with some 30 stakeholders in the area (farmers, administration, users' associations, researchers, etc.). They initiated dialogue between the users and the administration, and made it possible to reach an agreement on a common concern, to identify groundwater governance principles, to identify solutions to be implemented and to build social capital between the participants.