EN
The article presents the reconstruction of dynamics and development of a landslide in Wiąg. The study area is located in lower Vistula valley, near Świecie. Research conducted since 2007 shows that the landslide in Wiąg had developed in stages. Aerial photography from the last 50 years have been used in order to define the dynamics of the landscape. The first phase of development was a shallow landslide in the eastern part. In 1979, during one of the biggest floods in XXth century the most important episode took place. A landslide with the area of 22000m² arose. In next few years the landslide hasn't shown any significant activity. In 2010, during the flood, it revived. There has been conducted an analysis of geological structure and water levels, that enabled to define the main factors causing the rise of the landslide. One of the most important factors is the loss stability of the slope caused by increased pore pressure during the rapid decrease of flood wave.