Author(s): Hubert Chanson

Linked Author(s): Hubert Chanson

Keywords: Hydraulic jumps; Positive surges; Turbulent shear stress; Sediment processes; Bedscour; Suspension; Decelerating surges

Abstract: In an open channel, a sudden rise in water level induces a positive surge. Once fullydeveloped, the surge becomes a hydraulic jump in translation. Herein unsteady turbulent shear stresses were measured during the translation of a fully-developed positive surge. New investigations were conducted in a large rectangular channel (12 m long, 0.5 m wide) and measurements were performed using acoustic Doppler velocimetry with a high temporal and spatial resolution (200 Hz sampling rate). Horizontal and adverse bed slope configurations were tested. In the latter, the surge decelerated until it became a stationary hydraulic jump.

DOI:

Year: 2009