Virtualization of debris flow disaster using basic survey data

Yoshinori ISHIZAWA, Minoru KANESHIGE, Takashi ITO, Takahiro YAMAMOTO, Soya HONJYO, Takeharu SATO and Atsushi MORISHITA


Nowadays, hazard maps are commonly made available to the public. However, while public awareness of hazard maps is increasing, few people appropriately understand their meaning. And the fact that the evacuation rate in areas affected by debris flows remains low is seen as a problem. Therefore, the objective of this study was to help residents correctly understand the risk of debris flows and improve their awareness of disaster prevention. To achieve this goal, the 3D model and the virtual space environment were created by using basic survey data. We also studied a method to easily create 3D models of multiple buildings in areas where 3D city models have not been developed. As a result, it became possible to intuitively grasp the risk by comparing the height of the buildings and the height of the debris flow.

Key words

3D hazard map, debris flow disaster, virtual space