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The riverbed regradation is the direct consequence of various physico-geographic and socio-economic factors influence. In the first group one must distinguish the characteristics of the upper hydrographic basin from that situated downstream of Cluj-Napoca. The operation of the Someşul Mic hydropower system is decisive for the evolution of the riverbeds dynamics. The relationships hp=f(T) and hp5=f(T) show similarities, but also differentiation in their multiannual tendencies. In case of all three stations there were identified periods with high dynamics, but also periods of significant stability. Based on variation trends, eight distinguished periods were established at the first two stations and seven at Salatiu. By comparing the linear trends, they indicate different evolutions at all three stations and the polynomial trends show some similarities between Apahida and Salatiu stations.