Articles | Volume 24, issue 7
https://doi.org/10.5194/nhess-24-2315-2024
https://doi.org/10.5194/nhess-24-2315-2024
Research article
 | 
09 Jul 2024
Research article |  | 09 Jul 2024

An improved dynamic bidirectional coupled hydrologic–hydrodynamic model for efficient flood inundation prediction

Yanxia Shen, Zhenduo Zhu, Qi Zhou, and Chunbo Jiang

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Short summary
We present an improved Multigrid Dynamical Bidirectional Coupled hydrologic–hydrodynamic Model (IM-DBCM) with two major improvements: (1) automated non-uniform mesh generation based on the D-infinity algorithm was implemented to identify flood-prone areas where high-resolution inundation conditions are needed, and (2) ghost cells and bilinear interpolation were implemented to improve numerical accuracy in interpolating variables between the coarse and fine grids. The improved model was reliable.
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