Abstract
Storm-surge modelling in the northern Bay of Bengal still remains a challenge due to the complex tidal nature and poor observational coverage. In this study, using satellite information, a coupled modelling system was developed which comprises Delft3D-Flow and simulated wave nearshore to simulate the storm surge associated with cyclone Mora 2017. In this study, followed by a hydrodynamic model development, a wind-pressure parametric Holland model was parameterised and validated using the Ascat MetOp B Level 2 wind speed. The significant wave height (SWH) was validated using CryoSat-2 and AltiKa-derived sea surface altimetry. The coupled model provides a realistic interpretation of storm surge. The tide-surge interaction in surge generation is largely dominated by shallow bathymetry and tide phase. The computed peak storm-surge height was 3-3·5 m along the landfall location - that is, Chittagong-Cox's Bazar coast and the maximum SWH of 4·2-5·3 m, formed surrounding the eye of the cyclone. The predicted surge height exhibits a reasonable match with the observed measurement and the obtained coefficient of determination is 0·87-0·91. Therefore, the developed storm-surge model with satellite-derived information is envisaged to support storm-surge modelling in data-scarce regions.
| Original language | English |
|---|---|
| Pages (from-to) | 73-94 |
| Number of pages | 22 |
| Journal | Proceedings of the Institution of Civil Engineers: Maritime Engineering |
| Volume | 172 |
| Issue number | 3 |
| DOIs | |
| State | Published - Sep 1 2019 |
| Externally published | Yes |
Funding
This research was supported by funds for obtaining a master of science in civil engineering provided by the Department of Civil Engineering, Chittagong University of Engineering and Technology (CUET), Bangladesh. The authors express their gratitude to BWDB, the Bangladesh Navy and INCOIS for providing bathymetric, meteorological and validation data during the study.