Characterization of flood inundation in Sanjo City, Japan on July 13, 2004
On July 13, 2004, a heavy rainfall hit the Niigata area, resulting in a levee breach in the Ikarashi River. The inundation in the Sanjo City claimed 15 victims and caused huge property damage. The present work conducted analysis on peak discharge and water level variation at the place where the levee was breached. It also carried out flood inundation simulation in order to gain a better understanding of the consequences of the levee failure. It is found that the peak discharge on July 13, 2004 exceeded the full capacity of the river Ikarashi by approximately 20%. Besides, the outflow hydrograph from the breach was estimated for performing inundation simulation. Flood inundation simulation shows that the water spread out through the Sanjo City generally in two directions, and the maximum inundation depth was above 2m.
Key wordsflood levee breach 1-D river simulation 2-D inundation simulation Ikarashi river Sanjo city
Unable to display preview. Download preview PDF.
- TAMAI Nobuyuki. A flash report on the flood disaster caused by a heavy rainfall in the Hokuriku region in July 2004, Journal of the Japan Society of Civil Engineering, 2004, 89(10): 7–10. (in Japanese)Google Scholar
- JSCE. Investigation report on the Hokuriku flood disaster, 2005, 3. (in Japanese)Google Scholar
- HUANG Guangwei. IZUMIYA Takashi. TAMAI Nobuyuki. Investigation of flood in Ikarashi River due to the heavy rainfall in Niigata and Fukushima region on July 13, 2004, River Engineering, JSCE, 2005, 11: 127–132. (in Japanese)Google Scholar
- INOUE Kazuya. Flood inundation simulation model, Disaster Prevention Research Institute Annuals, Kyoto University, 2005, 48(A): 1–13. (in Japanese)Google Scholar
- Cunge, J.A. Holly Jr. F.M. Verwey A. Practical aspects of computational river hydraulics, 1976, Pitman London.Google Scholar