Rekonstrukcja przepływu wielkich wód Wisły w Warszawie w warunkach naturalnych

Geomorphology of the Vistula River Valley in Warsaw has been presented, as well as history of flood protective dikes and channel regulation works. From historical sources we have the description of catastrophic flood of 1635. The level of the flood of 1844 has been preserved in the form of high water mark. Using two dimensional hydrodynamic model CCHE2D the simulation of thousand years recurrence flood has been performed. It has been compared the result of the calculations with historical chronic and high water mark. It has been calculated the pattern of flood water flow over Praga district terrace, showing also the possibility of flood flow directly to Narew river through the relive channels leading by a terrain depressions of today's Zeranski Canal and Bródnowski Canal.