Abstract
The most common structure for discharge measurement in streams is a weir. Generally, they are used as normal weirs which allow water to pass gradually over their crest, causing submergence due to afflux at upstream. For passing more discharge with low head, the weirs of different planforms were recommended to improve their discharge capability with minimum head and to limit the afflux. The present study has been carried out to investigate the discharge characteristics of trapezoidal planform weirs. The weirs efficiency is found better than the normal weir. A discharge equation has been proposed and found that it is calculating the discharge within ±5% as compared with observed discharge. The weir sensitivity which is discharge variation because of change in per unit head over the crest is also analyzed and found that the sensitivity is more at the low head over the weir and higher length-to-width ratio.
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Gupta, K.K., Kumar, S. (2017). Flow over Sharp-Crested Trapezoidal Planform Weirs. In: Garg, V., Singh, V., Raj, V. (eds) Development of Water Resources in India. Water Science and Technology Library, vol 75. Springer, Cham. https://doi.org/10.1007/978-3-319-55125-8_31
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DOI: https://doi.org/10.1007/978-3-319-55125-8_31
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