My thesis is the result of a European research conducted since 2009 about the implementation of flood resilience. This research is multidisciplinary; it involves hard sciences and human sciences researchers. This experience was a first step to develop my PhD subject. Indeed, the interaction between hard and human sciences is a key to a better understanding of how the issue of floods could be appropriate by non technical specialists. This research has to take into account the special context of the landuse in flooding areas in the Greater Paris, between a strong regulation and the real estate pressure. Behind the technical aspects of flood risk, the risk integration by the stakeholders is a relevant aspect of the landuse. We will search if the flood risk is considered as a main issue in the execution of an urban project and in this way observe the integration of the risk throughout the project.