This experiment consists in continuous seismic records acquired during an entire summer season (early June-early October) at 40 stations along the banks of the Sévraisse River (French Alps). The seismic array consists in sub arrays of 5 sensors designed to enable sub-wavelength analysis while covering a representative part of the river braided reach. Our ultimate goal is to locate river seismic sources generated by sediment transport and/or fluid flow as well as to evaluate their spatial and temporal changes over various scales.