文章基本信息

标题：Flood-induced ground effects and flood-water dynamics for hydro-geomorphic hazard assessment: the 21–22 October 2019 extreme flood along the lower Orba River (Alessandria, NW Italy)
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作者：Andrea Mandarino ; Fabio Luino ; Francesco Faccini 等
期刊名称：Journal of Maps
印刷版ISSN：1744-5647
出版年度：2021
卷号：17
期号：3
页码：136-151
DOI：10.1080/17445647.2020.1866702
语种：English
出版社：Journal of Maps
摘要：The knowledge of flood-induced ground effects and flood-water dynamics is a crucial issue for hydro-geomorphic hazards assessment and mapping, and thus for river management and land use planning. This paper and the related 1:15,000 map illustrate the lower Orba River (NW Italy) and its adjacent floodplain geomorphic response to the 21–22 October 2019 extreme flood. This was estimated to be a 500-years flood and caused severe damage to cultivated fields, structures, and infrastructures. The research is based on extensive post-flood field surveys, ante- and post-flood GNSS surveys, and aerial photographs interpretation. Intense in-channel sediment mobilization, bank retreats, and channelization structures collapses were surveyed. Furthermore, alluvial gullies, overbank deposits, crevasse splays, and surficial-erosion evidences were mapped over the floodplain, along with the flooded area (17.65 km2) and the flood-water features. A specific legend developed for flood-related and anthropogenic elements mapping in a typical lowland agricultural landscape with regulated rivers is proposed.
关键词：Floods;geomorphic effectiveness;geomorphological mapping;alluvial gully;Orba River;north-western Italy