Dissimilarity Mesh Size Assessment for Two Dimensional Flood Routing Model

W. H. Azad, Lariyah Mohd Sidek, H. Basri, A. J. Hassan

Research output: Chapter in Book/Report/Conference proceedingChapter


2 Dimensional (2D) flow modeling is widely used for flood plain analysis and is considered to be a viable tool for evaluating flood propagation. The accuracy of open channel hydraulics and flood plain model is dependent on the refinement of model mesh or grid to represent ground model topography using high-resolution Light Detection and Ranging (LiDAR). This paper examines the sensitivity of unstructured mesh size of two dimensional (2D) shallow water models. The accuracy of simulated overland flood propagation was carried out using the Delaunay refinement method. The study was performed by connecting to the 2D hydrodynamic modeling platform InfoWorks Integrated Catchment Modelling (ICM) using two different methodologies. The first method is based on the generation Baseline of mesh model from the Digital Terrain Model (DTM), whereas the second method is based on the different mesh size. The results of flood propagation were analyzed using dissimilarity mesh resolutions in term of surge degree and run time. It can be concluded that the spatial resolution of the hydrodynamic model discretization influences model skill in simulating water surface elevation, flood depth, and agreement between inundation maps. However, further study is necessary to understand the entire performance of the two suggested methods.

Original languageEnglish
Title of host publicationWater Resources Development and Management
Number of pages11
Publication statusPublished - 01 Jan 2020

Publication series

NameWater Resources Development and Management
ISSN (Print)1614-810X
ISSN (Electronic)2198-316X

All Science Journal Classification (ASJC) codes

  • Management, Monitoring, Policy and Law
  • Water Science and Technology
  • Environmental Engineering
  • Renewable Energy, Sustainability and the Environment

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    Azad, W. H., Mohd Sidek, L., Basri, H., & Hassan, A. J. (2020). Dissimilarity Mesh Size Assessment for Two Dimensional Flood Routing Model. In Water Resources Development and Management (pp. 245-255). (Water Resources Development and Management). Springer. https://doi.org/10.1007/978-981-15-1971-0_25