Upstream Discharge Distribution in Compound-Channel Flumes

Performance of lateral velocity distribution models for compound channel sections

Hydraulic engineering studies related to floods usually require the lateral distribution of flow velocity across the compound channel section, constituted by the main channel and the floodplain. 2D-Horizontal numerical models (such as the public domain software RMA2 of USACE) are now broadly accepted as an appropriate theoretical model to solve this problem. However, as in the majority of appli...

head-discharge relationship of flumes: energy loss versus boundary layer

long-throated flumes are measurement structures often used in water and wastewater systems to determine the flow discharge. the head-discharge relationship of long-throated flumes is traditionally determined following the critical flow theory and the boundary layer concept. after a review of the traditional approach and an analysis of the approximate assumptions of the boundary layer approach, ...

Across-channel distribution of the mean and tidal flows in the Khuran Channel, Persian Gulf, Iran

The Khuran Channel, Southern Iran (26°45’N), is a topographically complex channel which is open at both ends. Owning to its particular geometry, this narrow channel is subjected to strong tidal currents.Across-channel distribution of the mean and tidal flows were obtained over a semidiurnal tidal cycle in the Khuran Channel where the highest tidal velocity in the third day of the seco...

Discharge, discharge variability, and the bedrock channel profile

Sluicing Flumes for Gauging Sediment-Laden Rivers

The sluicing flume that was designed is less capable of silting up and losing its calibration than its counterparts of standard sharp-crested compound weir design. The laboratory work described here led to a refinement in the design in the form of a short flume set into the lowest section of a compound Crump weir gauging installation. Critical flow occurs near the exit of this flume, and it is ...