Ocena odpływu wezbraniowego ze zlewni Potoku Służewieckiego w Warszawie

Hydrological regime of urban catchment is a subject of serious changes in comparison to natural catchment. Increase of storm runoff and growth of flood risk, rise the concern. Influence of land use change on storm runoff and isochrons method for assignment of hydrograph in urban catchment have been studied. Desing storm hyetograph, calculated according to Bogdanowicz method has been (1998), on calculated from maximum rainfall data and synthetic scaling method (Bogdanowicz, Stachy, 1998). Measurements in Służewiecki Stream in Warsaw have been used from years 1993, 2002, 2012. In the period 1993-2012 we observe growth of runoff coefficient, which is a consequence of increasing impervious areas. Calculated hydrographs in 3 hours duration and 8 hours duration are higher than presented by Banasik, Hejduk, Barszcz (2007), but precisely comparison is not possible, because rainfall frequency is different (10 year and 1 year).