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The earth dams breach erosion is analyzed using width and failure time given by parametric models. The obtained dam breach parameters after parametric models are used for prediction breach outflow hydrograph. The one-dimensional unsteady flow model in reservoir was applied for prediction breach outflow hydrograph. The outflow hydrographs for dam breach obtained using Froehlich and Von Thun Gillette...
Turbulence intensity of the stream has a great effect on process of local bed erosions of a river. Quantative qualification of this effect is not settled yet. Author performed laboratory experiments on two models of dam in various scales. The final aim of the experiments is recognition of mechanism forming of local bed scours what bases on measurement of local flow velocity below hydraulic jump. This...
Paper presented analysis results of investigations of model on formation of scour in time. Investigations were conducted on model taired constructions with the over of water under the closure, bottom of water basins and washing-out area. Model were made in scale 1 : 30. In inwestigations were used as eroded material - sand (d50=1,1 mm). For modelling hydraulic parameters of flow on model were used...
W pracy przedstawiono efekty modernizacji zbiornika wodnego na rzece Gnidzie w Leźnicy Wielkiej. Dokonano oceny stanu technicznego zbiornika przed jego renowacją. Scharakteryzowano przeprowadzone prace modernizacyjne budowli upustowej oraz lewostronnej grobli bocznej Zalewu Leźnickiego. Wykonana renowacja ułatwiła prawidłową eksploatację i kontrolę przepływu wód na obiekcie oraz poprawiła walory krajobrazowe...
In northern Iraq, countless non-abuse stream valleys can be used to store water for a variety of purposes; domestic, supplementary irrigation, and recharging groundwater. Bandawaya is one of the stream valleys, which form the first perspective has excellent quality. The location of the suggested dam has been evaluated by hydrological and geotechnical studies. Geotechnical studies included measurement...
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