Vol. 11, Issue 2 (2022)

Author(s):
Ratna Raju CH and Yogitha P

Abstract:
At the Hydraulics Laboratory, the current study was carried out in a hydraulic flume with a motorized bed slope change equipment, College of Agricultural Engineering, Bapatla. The main objective was to design semi-circular crested weir and determine the flow characteristics of critical depth, location of critical depth for different co-efficient of discharges for critical flow conditions. Two weirs with three different discharges (12 l/s, 14 l/s, and 6 l/s) and three depths(18.5 cm, 14 cm and 7.8 cm) were used in the experiment. The results indicate that the distance of critical section from the crest will not be constant for lower discharges and also observed that the distance of critical section from the crest has been reduced with increase in discharge for both the crest heights. The co-efficient of discharge was found to be higher with higher discharges for both the models and the co-efficient of discharge was found to higher for smaller diameter semi-circular weirs.