Water Science and Engineering 2017, 10(4) 267-274 DOI:   https://doi.org/10.1016/j.wse.2017.12.004  ISSN: 1674-2370 CN: 32-1785/TV

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Keywords

Uniform Cartesian grid system
Flood simulation
Wetting and drying
Shallow water equation
Godunov-type finite volume scheme
Authors
PubMed

An efficient dynamic uniform Cartesian grid system for inundation modeling

Jing-ming Hou a, Run Wang a, Hai-xiao Jing a, *, Xia Zhang a, Qiu-hua Liang b, Yan-yan Di c

a Institute of Water Resources and Hydro-Electric Engineering, Xi'an University of Technology, Xi’an 710048, China;
b School of Civil Engineering and Geosciences, Newcastle University, Newcastle upon Tyne NE1 7RU, UK
c Hydrology Bureau, Yellow River Conservancy Commission, Zhengzhou 450004, China  

Abstract

A dynamic uniform Cartesian grid system was developed in order to reduce the computational time in inundation simulation using a Godunov-type finite volume scheme. The reduction is achieved by excluding redundant dry cells, which cannot be effectively avoided with a conventional Cartesian uniform grid system, as the wet area is unknown before computation. The new grid system expands dynamically with wetting, through addition of new cells according to moving wet-dry fronts. The new grid system is straightforward in implementation. Its application in a field-scale flood simulation shows that the new grid system is able to produce the same results as the conventional grid, but the computational efficiency is fairly improved.

Keywords
Uniform Cartesian grid system
   Flood simulation   Wetting and drying   Shallow water equation   Godunov-type finite volume scheme  
Received 2017-04-23 Revised 2017-09-30 Online: 2017-10-30 
DOI: https://doi.org/10.1016/j.wse.2017.12.004
Fund:

This work was supported by the National Natural Science Foundation of China (Grant No. 19672016), the National Key R&D Program of China (Grant No. 2016YFC0402704), the State Key Program of the National Natural Science Foundation of China (Grant No. 41330858), and the UK Natural Environment Research Council (NERC) (Grant No. NE/K008781/1).

Corresponding Authors: jinghx@xaut.edu.cn (Hai-xiao Jing)
Email: jinghx@xaut.edu.cn
About author:

References:

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