Study on The Hydraulics During The Construction of A Closure In A Tidal Channel at Meghna Estuary

Anmol Haque-|||-Department of Civil and Environmental Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, United States===|===Md. Ataur Rahman-|||-Department of Water Resources Engineering, Bangladesh University of Engineering and Technology, Dhaka-1000, Bangladesh
2024-08-27
Item Value
Serial 14
Article Conference Acronym
Manuscript Number
Article Volume Volume 05
Article Issue Issue 02
Article DOI doi.org/10.70279/bmj-v5-i2-1016
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Article Slug study-on-the-hydraulics-during-the-construction-of-a-closure-in-a-tidal-channel-at-meghna-estuary
Article Keyword Meghna estuary, Land reclamation, Tidal closure, Hydrodynamic model.
Article Entry Time 11:02:46
Article Page Views 35
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Article References

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Abstract

The study was conducted to assess the hydrodynamic changes during construction of a closure in a 4 km wide tidal channel between Subornachar and Swarnadip island located in the Meghna Estuary. Two construction methods have been considered - vertical and horizontal closing method. A 2D hydrodynamic model, MIKE-21FM, has been set up for the simulations of critical hydrodynamics at different construction stages of these two closing methods. For the horizontal closing method, seven construction stages were considered and for the vertical closing method five construction stages were considered. Model simulation shows that the maximum flow velocities during the construction of the closure simulated during neap flood tide vary from 1.43 m/s to 4.76 m/s at different stages of horizontal closing. For the vertical closing method, the simulated maximum flow velocities vary from 2.76 m/s to 3.88 m/s during neap flood tide. For such a wide channel having a width of 4 km, the vertical closing method of closure construction prevails more feasible as it has lower flow velocities during final construction stage as compared to horizontal closing method.