weirs have widely been used for the flow measurement, flow diversion and its control in the open channels. attempts have been made to study flow over different shapes of normal weirs, side weirs and oblique weirs. this paper is connected with the development of the discharge coefficient measurement. in the present study four different weirs in different height are considered for validation purp...

Weirs, as overflow structures, are extensively used for the measurement of flow, its diversion and control in the open canals. Labyrinth weir due to more effective length than conventional weirs, allows passing more discharge in narrow canals. Determination the design criteria for the practical application of these weirs need more investigation. Weir angle and its position relative to the flow ...

Abstruct.-Behavior and passage rate of smolts of Atlantic salmon Salmo salar and juvenile American shad Alma saplrilssima were compared between a standard (sharp-crested) and a modified surface bypass weir that employs uniform flow velocity increase (1 m.s-'.rnP' of linear distance). W i t h the first 30 rnin after release, significantly more smolts passed the modified weir than the standard we...

Abstract Weirs are hydraulic obstructions constructed across an open-channel flow causing a rise in water which is useful to convert the channels upstream as well using these structures measuring device. There different types, and sharp-crested weir one of them. Local scour downstream most critical problems affecting their safety stability. Many studies conducted prevent facilities from collaps...

The present paper attempts to investigate the prediction of air entrainment rate and aeration efficiency of a free overfall jets issuing from a triangular sharp crested weir by using regression based modelling. The empirical equations, Support vector machine (polynomial and radial basis function) models and the linear regression techniques were applied on the triangular sharp crested weirs rela...

The present paper attempts to investigate the prediction of air entrainment rate and aeration efficiency of a free overfall jets issuing from a triangular sharp crested weir by using regression based modelling. The empirical equations, Support vector machine (polynomial and radial basis function) models and the linear regression techniques were applied on the triangular sharp crested weirs rela...

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 ...