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1
Typowy hydrogram przepływu dla potrzeb wyznaczania wezbrań hipotetycznych
100%
Gadek W.
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nr 4[52]
2
Assessment of limnigraph data usefulness for determining the hypothetical flood waves with the Cracow method
100%
Gadek W.
Journal of Water and Land Development
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2014
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nr 21
3
The hydrological model and formula for determining the hypothetical flood wave volume in non-gauged basins
63%
Gadek W. , Bodziony M.
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nr 1
EN
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.
4
Content available Determining hypothetical floods in the Odra basin by means of the Cracow method and the volume formula
63%
Gadek W. , Tokarczyk T.
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2015
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nr IV/4
5
Content available The evaluation of the design flood hydrographs determined with the Hydroproject method in the gauged catchments
63%
Gadek W. , Srodula A.
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nr IV/3
EN
In Poland there are several methods used for determination of the design flood hydrographs. Among the others, the method developed by Hydroprojekt is used. According to the authors’ knowledge, this method has not been published yet. The method assumes that the design flood hydrographs are to be determined based on the real registered floods in a given gauged cross-section. The method uses the random number generator from the range of (-0.1, 0.2) independently for time instants of the hydrograph rising and falling limbs. This enables that the hydrographs have different time courses at different peak discharges. The study analyses the results received from this method in comparison to the Cracow method, assuming that the model hydrograph is the rainfall hydrograph, unimodal with the biggest registered discharge. The Cracow Method is chosen as the most objective one because of the calculation procedures which enable to determine the average time course based on 8 biggest flood hydrographs, and this method enables to determine the design flood hydrograph volume during its construction based on the linear correlation. The comparative analyses were conducted for the reduced volume, i.e., flood volume at the discharges bigger than the peak discharge with given exceedance probability, Q50%. The comparison of rising times for the hydrographs determined with both methods was done as well. The comparisons were done for 11 gauged cross-sections located in the area of the Upper Vistula catchment and they included the rivers of different nature: mountainous, sub-mountainous, upland and lowland. The analyses were unsuccessful for the Hydroprojekt method. Similar to other methods where the base for the design flood hydrograph determination is one flood hydrograph, both the flood volume and the rising time in most cases are different from the average conditions determined with the Cracow method. When using a model hydrograph with the highest recorded peak discharge, the Hydroprojekt method does not perform well and rather should not be used.
6
Estimation of parametric flood hydrograph determined by means of Strupczewski method in the Vistula and Odra catchments
51%
Gadek W. , Tokarczyk T. , Srodula A.
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nr 31
7
The use of bioretention cell to decreasing outflow from parking lot
51%
Walega A. , Cebulska M. , Gadek W.
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2018
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nr 36
8
Methods of estimating the elements of water balance in a forested catchment basin
38%
Osuch B. , Gadek W. , Homa A. , Cebulska M. , Szczepanek R. , Hebda-Malocha A.
Journal of Water and Land Development
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2009
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nr 13a
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