LIDAR DATA PROCESSING FOR DETAILED INUNDATION SIMULATION OF AN URBANIZED AREA

RYOTA TSUBAKI

Graduate School of Science and Technology, Kobe University,

1-1 Rokkodai-cho, Nada-ku, Kobe 657-8501, Japan

ICHIRO FUJITA

Department of Architecture and Civil Engineering, Kobe University,

1-1 Rokkodai-cho, Nada-ku, Kobe 657-8501, Japan

HIROSHI TERAGUCHI

Politecnique School, São Paulo University,

Avenida Professor Luciano Gualberto, Travessa 3, 380 – Butantã – São Paulo, Brazil

(CEP:05508-900)

7th International Conference on Hydroinformatics

HIC 2006, Nice, FRANCE

Abstract:

An automated unstructured grid generation system from raw LiDAR data for inundation

analysis of urbanized and suburban areas is developed. With this system, it becomes

possible to perform detailed inundation prediction easily and quickly after a LiDAR

measurement is carried out, whose accuracy is much higher than the conventional GIS

(Geographic Information System). This system is applicable to regions where there are

no GIS data regarding detailed building arrangements. We applied the developed system

to the measured LiDAR data, simulated the inundation process, and compared the results,

with and without a vegetation model.