Work

Performance evaluation of high discharge estuarine hydrodynamic model

Year: 2025

Type: article

Abstract: The complexity of physical processes in an estuary provides challenges to develop a functional and reliable model. There is a lack of systematic method in calibrating and validating the model in reducing the time of processing the model which can take a longer time of analysis. This study presents a systematic calibration and validation approach for the TELEMAC-2D hydrodynamic model of a tropical estuary with high river discharge. Key parameters, including tidal prior current speed, time steps, friction coefficient, iteration, velocity diffusivity, and Courant number, were optimized. Model sensitivity analysis was conducted, and the bottom friction was calibrated using the Nikuradse law. The model achieved strong agreement with observation data (R 2 = 0.95, RMSE = 0.17, Ks = 0.32), demonstrating its reliability for simulating tropical estuarine hydrodynamics. This study emphasizes Courant number optimization, enhancing model stability, accuracy, and efficiency for reliable estuarine simulations and informed coastal management.

Source: Ain Shams Engineering Journal

DOI: 10.1016/j.asej.2025.103322

Authors: Shahirah Hayati Mohd Salleh, Wan Hanna Melini Wan Mohtar, Khairul Nizam Abdul Maulud, Nuryazmeen Farhan Haron, Nuraziemah Abd Rashid, Nor Aslinda Awang

Institutions: National University of Malaysia, Universiti Teknologi MARA System, Universiti Teknologi MARA, National Water Research Institute of Malaysia

Language: English

Topic: Aquatic and Environmental Studies

Subfield: Earth-Surface Processes

Field: Earth and Planetary Sciences

Domain: Physical Sciences

SDG: Clean water and sanitation

Open Access status: gold

Estimated APC paid: $1,200