Can sediments play a role in river flood risk mapping? Learning from selected European examples

IF 3.8 Q2 ENVIRONMENTAL SCIENCES Geoenvironmental Disasters Pub Date : 2023-09-28 DOI:10.1186/s40677-023-00250-9
Michael Nones, Yiwei Guo
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引用次数: 1

Abstract

Abstract Background Climate change and increasing anthropogenic pressure are two of the major drivers of increasing extreme events like droughts and floods. To deal with the increasing number of flooding events hitting Europe in the last few decades, around twenty years ago the European Commission started to develop ad-hoc legislation to reduce flood risk by mapping flood hazard and risk areas, such as the Directive 2007/60/EC on the Assessment and Management of Flood Risk. This Directive looks to identify regions where flood management strategies should be prioritized. Despite this holistic approach, flaws connected to the consideration of sediment transport and morphological changes in rivers exist, leading to potential underestimations of the impact of floods affecting active watercourses or areas subjected to frequent morphological changes. Results By discussing six examples related to European lowland and mountain watercourses affected by significant floods in the last 20 years, the present mini-review aims to provide additional evidence on the need for a rethinking of flood risk mapping, moving from a “clear water” perspective to a more integrated approach, where the interactions between all the fluvial components (water, sediment, biota, and humans) are adequately considered. Conclusions The examples reported here show the importance of considering sediment and wood in flood risk management, suggesting the need for integrating flood-related studies with other disciplines like geomorphology and ecohydrology.
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沉积物能否在河流洪水风险制图中发挥作用?从选定的欧洲例子中学习
气候变化和人为压力的增加是干旱和洪水等极端事件增加的两个主要驱动因素。在过去的几十年里,为了应对越来越多的洪水事件袭击欧洲,大约20年前,欧盟委员会开始制定特别立法,通过绘制洪水危害和风险区域来减少洪水风险,例如关于洪水风险评估和管理的2007/60/EC指令。该指令旨在确定应优先考虑洪水管理战略的地区。尽管采用了这种整体方法,但由于考虑了河流的泥沙运输和形态变化,存在缺陷,导致洪水对活跃水道或频繁形态变化地区的影响可能被低估。通过讨论过去20年受重大洪水影响的6个与欧洲低地和山地水道相关的例子,本综述旨在为重新思考洪水风险制图的必要性提供额外的证据,从“清水”的角度转向更综合的方法,其中充分考虑了所有河流成分(水、沉积物、生物群和人类)之间的相互作用。本文所报道的例子表明,考虑沉积物和木材在洪水风险管理中的重要性,表明需要将洪水相关研究与地貌学和生态水文学等其他学科相结合。
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来源期刊
Geoenvironmental Disasters
Geoenvironmental Disasters Social Sciences-Geography, Planning and Development
CiteScore
8.90
自引率
6.20%
发文量
22
期刊介绍: Geoenvironmental Disasters is an international journal with a focus on multi-disciplinary applied and fundamental research and the effects and impacts on infrastructure, society and the environment of geoenvironmental disasters triggered by various types of geo-hazards (e.g. earthquakes, volcanic activity, landslides, tsunamis, intensive erosion and hydro-meteorological events). The integrated study of Geoenvironmental Disasters is an emerging and composite field of research interfacing with areas traditionally within civil engineering, earth sciences, atmospheric sciences and the life sciences. It centers on the interactions within and between the Earth''s ground, air and water environments, all of which are affected by climate, geological, morphological and anthropological processes; and biological and ecological cycles. Disasters are dynamic forces which can change the Earth pervasively, rapidly, or abruptly, and which can generate lasting effects on the natural and built environments. The journal publishes research papers, case studies and quick reports of recent geoenvironmental disasters, review papers and technical reports of various geoenvironmental disaster-related case studies. The focus on case studies and quick reports of recent geoenvironmental disasters helps to advance the practical understanding of geoenvironmental disasters and to inform future research priorities; they are a major component of the journal. The journal aims for the rapid publication of research papers at a high scientific level. The journal welcomes proposals for special issues reflecting the trends in geoenvironmental disaster reduction and monothematic issues. Researchers and practitioners are encouraged to submit original, unpublished contributions.
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