Flood Inundation Assessment in the Low-Lying River Basin Considering Extreme Rainfall Impacts and Topographic Vulnerability

Thanh Thu Nguyen; Nakatsugawa, Makoto; Yamada, Tomohito J.; Hoshino, Tsuyoshi

Flood Inundation Assessment in the Low-Lying River Basin Considering Extreme Rainfall Impacts and Topographic Vulnerability

Thanh Thu Nguyen; Nakatsugawa, Makoto; Yamada, Tomohito J. et al.

Water, 2021, 13(7), 896

Permalink : https://hdl.handle.net/2115/81532

このアイテムのアクセス数:392件（2026-08-08 04:26 集計）

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論文情報

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アクセス権	open access
URI	https://hdl.handle.net/2115/81532
タイトル	Flood Inundation Assessment in the Low-Lying River Basin Considering Extreme Rainfall Impacts and Topographic Vulnerability
著者	Thanh Thu Nguyen ; Nakatsugawa, Makoto ; Yamada, Tomohito J. ; Hoshino, Tsuyoshi
著者名 Thanh Thu Nguyen
著者名 Nakatsugawa, Makoto
e-Rad_Researcher 10554959 著者名 Yamada, Tomohito J.
e-Rad_Researcher 40750625 著者名 Hoshino, Tsuyoshi
言語	英語
キーワード	river discharge
	flood inundation
	Ishikari River basin
	Chitose River basin
	d4PDF
	RRI model
	climate change
	backwater phenomenon
	hydrological modelling
	hydraulic modelling
発行日	2021-04
出版者	MDPI
収録物名	Water
巻(号)	13(7)
ページ	896
抄録	This study aims to evaluate the change in flood inundation in the Chitose River basin (CRB), a tributary of the Ishikari River, considering the extreme rainfall impacts and topographic vulnerability. The changing impacts were assessed using a large-ensemble rainfall dataset with a high resolution of 5 km (d4PDF) as input data for the rainfall-runoff-inundation (RRI) model. Additionally, the prediction of time differences between the peak discharge in the Chitose River and peak water levels at the confluence point intersecting the Ishikari River were improved compared to the previous study. Results indicate that due to climatic changes, extreme river floods are expected to increase by 21-24% in the Ishikari River basin (IRB), while flood inundation is expected to be severe and higher in the CRB, with increases of 24.5, 46.5, and 13.8% for the inundation area, inundation volume, and peak inundation depth, respectively. Flood inundation is likely to occur in the CRB downstream area with a frequency of 90-100%. Additionally, the inundation duration is expected to increase by 5-10 h here. Moreover, the short time difference (0-10 h) is predicted to increase significantly in the CRB. This study provides useful information for policymakers to mitigate flood damage in vulnerable areas.
資源タイプ	学術雑誌論文
出版タイプ	Version of Record
関連情報 (isIdenticalTo)	出版社版DOI https://doi.org/10.3390/w13070896