Sediment transport is a fundamental geomorphological process which shapes the landscape and governs the temporal evolution of landforms. It turns out that the SAR interferometry technique is an effective tool to evaluate the surface deformation, and thus, could be employed to study the sediment transport in rivers. In this work, we investigate the sediment transport using this technique on the Remparts river located in the Réunion island, which is an ideal natural laboratory for the study of sediment transport and related issues due to its tropical volcanic nature. We show that the topography of the Remparts valley is satisfactory for the SAR imaging. By measuring the displacement from the InSAR interferogram in different time periods, we demonstrate that the sediment transport in the Remparts river is significantly driven by extreme climate events.