Applicability of the double-grid model for flood inundation in small rivers

Takeshi Sakai, Ichiro Kimura

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

The objective of this study is to validate the double-grid model in small-scale river during flood event. Recent advances in surveying technology have made it easier to obtain more accurate topographic data. However, the number of grid cells used in the calculation is limited because of heavy computational burden. Double grid model employs two scaled compu tational grids (a fine grid for strong topography and roughness data and a coarse grid for solv ing the governing equations). In this study, the double-grid model proposed by Volp et al. (2013) was applied to flood inundation phenomena in a real small-scale river. The results showed that the double-grid model is capable to simulate the inundation phenomena in small scale rivers with sufficient accuracy and reasonable CPU time. In addition, simulations of the double-grid model are carried out with different ratios of the number of coarse grids and fine grids and results were discussed focusing on the CPU time and computational accuracy.

Original languageEnglish
Title of host publicationProceedings of the 12th International Conference on Fluvial Hydraulics, River Flow 2024
EditorsIacopo Carnacina, Mawada Abdellatif, Manolia Andredaki, James Cooper, Darren Lumbroso, Virginia Ruiz-Villanueva
PublisherCRC Press/Balkema
Pages529-533
Number of pages5
ISBN (Print)9781032757216
DOIs
StatePublished - 2025
Event12th International Conference on Fluvial Hydraulics, River Flow 2024 - Liverpool, United Kingdom
Duration: 2024/09/022024/09/06

Publication series

NameRiver Flow - Proceedings of the 12th International Conference on Fluvial Hydraulics, River Flow 2024

Conference

Conference12th International Conference on Fluvial Hydraulics, River Flow 2024
Country/TerritoryUnited Kingdom
CityLiverpool
Period2024/09/022024/09/06

ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes
  • Geotechnical Engineering and Engineering Geology

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