Advances in sensing approaches have allowed hydrological and hydrodynamic models to be implemented in a wide range of cases: from complex flash-floods to global models. However, such approaches are new and the limits of their accuracy and employability in different contexts are still not fully known. Therefore, the objective of this study is to test a citizen science sensing approach ability to improve hydrological and hydrodynamic modelling of an urbanized catchment. Results indicate the conditions under which data can be useful for model.@en