The paper presents an analysis of the morphological degradation process of the riverbed and the riparian zone determined by the transit of a flood with very high flows. The studies and researches were carried out between 2016 and 2022 in the Moldova river basin, especially on the Moldova, Voronet and Suha rivers. The research carried out on the Voronet River after the disaster flood in June 2016 highlighted the complex action of water on the riverbed and the constructions in the riverbed and the riparian area. An important morphological degradation took place on a sector located on the middle course of the Voronet River. The riverbed in this sector has been partially calibrated, because the riparian area is occupied by houses (right bank) and a road (left bank). The flood was produced by the precipitations that registered in two days a value of 71.6 l/ m2. The runoff from the river basin generated a flow in the final section of the Voronet River of 118.12 m3/s (calculation probability 1%). The flood presented a complex action on the riverbed represented by deep erosion of the riverbed, clogging by sectors and transport of natural and biological material with large volumes. The flood affected the human environment by degrading the county road on a length of about 1600 m, breaking bridges and footbridges, excessive degradation of shore defence works (about 2600 m), degradation of houses, outbuildings and others.