Perforated Weir for Effective Operation â€“ A Study
Keywords:Perforated weir, Coefficient of discharge, Head of water.
The excess water during monsoon season in the river is retained using low dams and it overflows through weirs. Maintaining the water depth at the required level and increasing the discharge from the weir are the current problems facing now a days. To overcome these problems, a novel sharp crested perforated weir has been developed in this work with different shapes of perforations viz. circle, rectangle, square and triangle having same area of perforation. A total of 24 models were made with single, double, triple opening for each shape, under two different sets of area of openings. The models were examined in a hydraulic tilting flume by keeping the discharge as constant. The variation in head obtained from these perforated weirs for different shapes were compared with a control weir which is a sharp crested rectangular weir. The expected theoretical discharge from these perforated weirs is compared with the actual discharge obtained. The values of coefficient of discharge for different perforated weirs were obtained by minimizing the error and the effective perforated weir is arrived by analyzing the values. This solution can be applied in solving practical problems.
 Kumar S and Ahmad Z, â€œDischarge Characteristics of Sharp Crested Weir of Curved plan-formâ€, Research Journal of Engineering Sciences, 2012, Vol.1(4), pp. 16-20.
 Emad Abdul Gabbar and Adman Abdul Wahab, â€œOverflow Characteristics of Cylindrical Shape Crest Weirs Over Horizontal Bedâ€, Tikrit Journal of Engineering Sciences, 2011, vol. 18(4), pp. 29-39.
 Bagheri S , â€œFlow over rectangular sharp- crested weirsâ€, Irrigation Science, 2010, Vol. 28, pp. 173-179.
 Johnson M.C, â€œDischarge co-efficient analysis for flat-topped and sharp-crested weirsâ€, Irrigation Science, 1999, Vol. 19, pp. 133-137.
 Anderson R.M and Tullis B.P, â€œPiano Key weir hydraulics and labyrinth weir comparisonâ€, Journal of Irrigation and Drainage Engineering, Vol. 139(3), pp. 246-253.
 Khode B.V, â€œEvaluation and analysis of crest coefficient for labyrinth weirâ€, World Applied Sciences Journal, 2010, Vol. 11(7), pp. 835-839.
View Full Article:
How to Cite
LicenseAuthors who publish with this journal agree to the following terms:
- Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under aÂ Creative Commons Attribution Licensethat allows others to share the work with an acknowledgement of the work''s authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal''s published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (SeeÂ The Effect of Open Access).