ANALYSIS OF MODELING RESULTS FOR RIVER BANK PROTECTION OF THE MOST VULNERABLE PART OF TAZUMUDDIN UPAZILA UNDER BHOLA DISTRICT

  • Md. Abdul Aziz MIST
  • Rubayat Alam Institute of Water Modeling
  • Upal Mahamud Institute of Water Modeling
  • Zahirul Haque Khan Institute of Water Modeling
Keywords: Embankment, bank line shifting, erosion deposition process, char movement

Abstract

Bhola is the largest Island of Bangladesh situated in the south central region (latitude approximately from 430000N to
525000N and longitude 555000E to 590000E) of Bangladesh in the highly dynamic Meghna Estuary. In recent years
the erosion along eastern shoreline of Bhola Island has become a serious issue. Attempts are taken to establish the
base line condition to simulate the natural phenomena. Baseline condition for Tazumuddin Upazilla (under Bhola
district) has been developed based on hydrodynamic and morphological modelling and historical data of bank line
shifting, thalweg line shifting, bathymetric data, char movement etc. To calibrate and validate the model water levels
and discharge are successfully calibrated. From modeling result, erosion/deposition pattern at and outside the
protective works, new vulnerable areas due to revetment have been identified. Hydrodynamic (HD) simulations during
ebb tide the maximum depth integrated near bank velocity is found within the range of 1.5-3.0 m/s along the riverbank
of Tazumuddin and 1.0-1.5 m/s along the riverbank of Lalmohan. Morphological simulation shows the channel is
further extended towards the south-east part. Further computational simulation showed that channel in front of
Tazumuddin become deeper and it is extended more towards the south-east direction. From bathymetry survey data in
May, 05 it is found that there is a tendency to deepen the channel in front of Tazumuddin where protective work was
suggested and the deep channel is further extended towards south-east direction like simulation result. So it can be
concluded that simulation result and real condition near Tazumuddin follows the same trend of channel development.

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Published
2019-11-01
How to Cite
Md. Abdul Aziz, Rubayat Alam, Upal Mahamud, & Zahirul Haque Khan. (2019). ANALYSIS OF MODELING RESULTS FOR RIVER BANK PROTECTION OF THE MOST VULNERABLE PART OF TAZUMUDDIN UPAZILA UNDER BHOLA DISTRICT. MIST INTERNATIONAL JOURNAL OF SCIENCE AND TECHNOLOGY, 1(1). https://doi.org/10.47981/j.mijst.01(01)2009.12(%p)