Numerical Simulations of Flood and Inundation in Jobaru River Basin Using Laser Profiler Data

Laser Profiler (LP) data from aerial laser surveys have
been increasingly used as topographical inputs to numerical
simulations of flooding and inundation in river basins. LP data has
great potential for reproducing topography, but its effective usage has
not yet been fully established. In this study, flooding and inundation
are simulated numerically using LP data for the Jobaru River basin of
Japan’s Saga Plain. The analysis shows that the topography is
reproduced satisfactorily in the computational domain with urban and
agricultural areas requiring different grid sizes. A 2-D numerical
simulation shows that flood flow behavior changes as grid size is
varied.

• Hiroto Nakashima
• Toshihiro Morita
• Koichiro Ohgushi

• LP data
• numerical simulation
• topological analysis
• mesh size.

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