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April 3, 2026Physics of Fluids

A discharge-based velocity profile model for unsteady open-channel flow

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Authors

SSSarjati SahooKKKishanjit Kumar Khatua

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Overview

Model predicts velocity distributions in unsteady open-channel flow, suggesting improved accuracy and applications in hydraulic design.

Key Points

  • The study aims to develop a model that accurately predicts velocity profiles in unsteady open-channel flow based on discharge rates.
  • Developed a discharge-based velocity profile model incorporating a correction factor for flow unsteadiness.
  • Created separate formulations for the rising and falling limbs of the hydrograph.
  • Calibrated and validated the model using laboratory experiments and literature datasets.
  • Predictions from the steady-flow equations resulted in mean absolute percentage errors exceeding 300%.
  • The proposed model improved prediction accuracy with MAPE values mostly below 15%.
  • The model showed strong agreement with observed velocities, especially in mid-depth and near-surface regions.

Cite This Study

Sahoo et al. (2026) studied this question.

synapsesocial.com/papers/69cf5db15a333a821460b8a8https://doi.org/10.1063/5.0316641
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