Author(s): B. J. Dewals; N. Brasseur; S. Erpicum; P. Archambeau; M. Pirotton
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Abstract: This study involves physical modeling of flushing operations in a reservoir, conducted with the aim of getting validation data for assessing the predictive capacity of numerical models. The scale model represents a shallow reservoir controlled by two Creager spillways. The reservoir is 3.8 m wide and 2.8 m long. Several discharges have been tested between 5 and 15 l/s, with a water level ranging between 2.5 and 6 cm above the Creager crest. A non-erodible bottom representing bedrock or consolidated sediments is considered in the model below an erodible layer made of uniform polystyrene cylindrical particles with a characteristic grain size of about 2.5 mm. The model was instrumented with ultrasonic sensors to measure the free surface elevation vs. time. A camera located vertically above the model provides the evolution of the area where the erodible layer has been totally removed.
Year: 2009