Flood Hazard Assessment of Residential Areas Outside the Protected Area of the Red River Dike System in Hanoi, Vietnam

JARQ : Japan Agricultural Research Quarterly
ISSN 00213551
書誌レコードID(総合目録DB) AA0068709X

Hanoi, the capital city of Vietnam, is highly vulnerable to flooding from the Red River. A flood disaster in 1971 devastated the river basin and claimed the lives of 100,000 people. The Red River dike system was built to protect Hanoi from flooding of the Red River; however, thousands of households are outside the protected area inside the dike system and are highly vulnerable to flooding. Hanoi’s flood protection measures are classified according to the water level of the Red River at Long Bien station: warning levels 1, 2, and 3 correspond to water levels of 9.5 m, 10.5 m, and 11.5 m, respectively. However, risk-reduction strategies for residential areas based on a flood hazard assessment are still inadequate. This study modeled floods and mapped them using a two-dimensional depth-averaged hydrodynamic model to show the inundation depth levels for the entire area in high resolution. Residential areas were found to be highly vulnerable to flooding at all warning levels. Outside the area protected by the dike system, 40.17% (15.94 km2), 54.08% (21.44 km2), and 79.75% (31.60 km2) of the study area were inundated at warning levels 1, 2, and 3, respectively, and these areas contain a small number of households. These results can be used to develop flood prevention and mitigation plans for Hanoi.

作成者 Sai Hong ANH Toshinori TABATA Kazuaki HIRAMATSU Masayoshi HARADA
著者キーワード flood risk management inundation depth level two-dimensional hydrodynamic model
公開者 Japan International Research Center for Agricultural Sciences
受付日 2020-01-20
受理日 2020-05-26
国立情報学研究所メタデータ主題語彙集(資源タイプ) Article
開始ページ 147
終了ページ 160
DOI 10.6090/jarq.55.147
言語 eng