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The hydrological model and formula for determining the hypothetical flood wave volume in non-gauged basins

Gądek W., Bodziony M.

Meteorology Hydrology and Water Management. Research and Operational Applications

2015

Vol. 3, Iss. 1

3--9

Determination of theoretical flood waves, commonly known as hypothetical waves, is still a difficult problem to be solved. Most frequently hydrological modelling is used for this purpose. However, there are no methods for verifying the obtained calculation results. The assumption applied, that daily precipitation with a defined height difference probability triggers off a theoretical wave with the same probability of excess, was verified in four upland basins whose river mouths are located within Kraków metropolitan area. It was proved that in order to meet the assumption made, it is necessary for the precipitation duration, with defined height difference probability, to last 48 hours, because for daily precipitation the volume of calculated theoretical flood wave is too small. During the calculations, the hydrological model was used, as was the formula for flood wave volume determination for the area of Upper Vistula River, as developed by the main author of the publication. The relative error of the reduced volumes in relation to the volumes calculated with the Kraków method for theoretical flood waves, was lower than 30% in any case. Therefore, it can be acknowledged that the suggested method may be used for determining theoretical flood waves in any cross-section for the non-gauged catchment with a surface not exceeding 400 km2.

Zastosowanie modelu geomorfologicznego do wyznaczania wezbrań hipotetycznych w zlewniach niekontrolowanych

Gądek W., Banach W., Fiołka I.

Czasopismo Techniczne. Środowisko

2012

R. 109, z. 1-Ś

59--67

W artykule przedstawiono porównanie wyników symulacji obliczeniowych metody wyznaczania wezbrań hipotetycznych w zlewniach niekontrolowanych opracowanej w Zakładzie Hydrologii Politechniki Krakowskiej z wynikami uzyskanymi dla danych rzeczywistych w przekrojach wodowskazowych z zastosowaniem metody opracowanej w Instytucie Inżynierii i Gospodarki Wodnej Politechniki Krakowskiej. Analizy dokonano dla trzech zlewni kontrolowanych: Prądnika, Żabniczanki oraz Żylicy.

This paper presents comparison of hypothetical flood wave simulation method for ungauged catchments developed at Division of Hydrology, Cracow University of Technology, with results calculated for measured data in gauged cross-sections using method developed at Institute of Water Engineering and Water Management, Cracow University of Technology. Three gauged catchments were analysed: Prądnik, Żabniczanka and Żylica.