scholarly journals Homeowners’ perceptions of property-level flood risk adaptation (PLFRA) measures: the case of the summer 2007 flood event in England

2015 ◽  
Vol 5 (3) ◽  
pp. 251-265 ◽  
Author(s):  
R. Joseph ◽  
D. Proverbs ◽  
J. Lamond
Keyword(s):  
Flood Risk ◽  
Flood Event

scholarly journals Successful Small-Scale Household Relocation after a Millennial Flood Event in Simbach, Germany 2016

Water ◽  
2020 ◽  
Vol 12 (1) ◽  
pp. 156 ◽  
Author(s):  
Barbara Mayr ◽  
Thomas Thaler ◽  
Johannes Hübl
Keyword(s):  
Risk Management ◽  
Flood Risk ◽  
Planning Process ◽  
Flood Risk Management ◽  
Flood Event ◽  
Small Scale ◽  
Successful Implementation ◽  
Adaptive Planning ◽  
Extreme Flood ◽  
Household Relocation

International and national laws promote stakeholder collaboration and the inclusion of the community in flood risk management (FRM). Currently, relocation as a mitigation strategy against river floods in Central Europe is rarely applied. FRM needs sufficient preparation and engagement for successful implementation of household relocation. This case study deals with the extreme flood event in June 2016 at the Simbach torrent in Bavaria (Germany). The focus lies on the planning process of structural flood defense measures and the small-scale relocation of 11 households. The adaptive planning process started right after the damaging event and was executed in collaboration with authorities and stakeholders of various levels and disciplines while at the same time including the local citizens. Residents were informed early, and personal communication, as well as trust in actors, enhanced the acceptance of decisions. Although technical knowledge was shared and concerns discussed, resident participation in the planning process was restricted. However, the given pre-conditions were found beneficial. In addition, a compensation payment contributed to a successful process. Thus, the study illustrates a positive image of the implementation of the alleviation scheme. Furthermore, preliminary planning activities and precautionary behavior (e.g., natural hazard insurance) were noted as significant factors to enable effective integrated flood risk management (IFRM).

scholarly journals Coupled modelling of subsurface water flux for an integrated flood risk management

2009 ◽  
Vol 9 (4) ◽  
pp. 1277-1290 ◽  
Author(s):  
T. Sommer ◽  
C. Karpf ◽  
N. Ettrich ◽  
D. Haase ◽  
T. Weichel ◽  
...  
Keyword(s):  
Flood Risk ◽  
Data Exchange ◽  
Subsurface Water ◽  
Flood Event ◽  
Causal Process ◽  
Water Fluxes ◽  
Sewerage System ◽  
Flood Water ◽  
Coupled Modelling ◽  
Groundwater Levels

Abstract. Flood events cause significant damage not only on the surface but also underground. Infiltration of surface water into soil, flooding through the urban sewer system and, in consequence, rising groundwater are the main causes of subsurface damage. The modelling of flooding events is an important part of flood risk assessment. The processes of subsurface discharge of infiltrated water necessitate coupled modelling tools of both, surface and subsurface water fluxes. Therefore, codes for surface flooding, for discharge in the sewerage system and for groundwater flow were coupled with each other. A coupling software was used to amalgamate the individual programs in terms of mapping between the different model geometries, time synchronization and data exchange. The coupling of the models was realized on two scales in the Saxon capital of Dresden (Germany). As a result of the coupled modelling it could be shown that surface flooding dominates processes of any flood event. Compared to flood simulations without coupled modelling no substantial changes of the surface inundation area could be determined. Regarding sewerage, the comparison between the influx of groundwater into sewerage and the loading due to infiltration by flood water showed infiltration of surface flood water to be the main reason for sewerage overloading. Concurrent rainfalls can intensify the problem. The infiltration of the sewerage system by rising groundwater contributes only marginally to the loading of the sewerage and the distribution of water by sewerage has only local impacts on groundwater rise. However, the localization of risk areas due to rising groundwater requires the consideration of all components of the subsurface water fluxes. The coupled modelling has shown that high groundwater levels are the result of a multi-causal process that occurs before and during the flood event.

High-Resolution Simulation of Hydraulic Structures in a Typhoon Induced Urban Flood Event

2020 ◽  
Author(s):  
Yunsong Cui ◽  
Qiuhua Liang ◽  
Gang Wang ◽  
Jian Zeng ◽  
Jinchun Hu
Keyword(s):  
High Resolution ◽  
Flood Risk ◽  
Flood Event ◽  
Hydraulic Structures ◽  
Urban Flood ◽  
Flood Modelling ◽  
Flood Model ◽  
Fully Coupled ◽  
Urban Flood Modelling ◽  
Urban Flood Risk

<p>Due to climate change and rapid urbanization, urban flooding has become one of the major natural hazards threatening the safety of people and their properties and affecting the overall sustainability of cities across the globe, especially developing countries such as China. Flood modelling has now provided an indispensable tool to support urban flood risk assessment and management, and inform the planning of cities that are more resilient to flooding.</p><p>Hydraulic structures, e.g. regulation gates and pumping stations, play an important role in urban flood risk management. However, direct simulation of these hydraulic structures is not a current practice in 2D urban flood modelling. This work presents and applies a robust numerical approach to directly simulate the effects of hydraulic structures in a 2D high-resolution urban flood model. An additional computational module is developed and fully coupled to a GPU-accelerated finite volume shock-capturing urban flood model to directly simulate the highly transient flood waves through hydraulic structures. The improved flood model is applied to  reproduce a flood event induced by Typhoon “Lekima” in 2019 in Yuhuan, Zhejiang Province, China. At 3m resolution, the model is able to simulate the complete process of the flood event in nearly 3.5 times faster than real time, demonstrating the efficiency and robustness of the new fully coupled model for high-resolution food modelling in cities. Further simulations are performed to systemically investigate the effect of hydraulic structures and different operational regulations on flood dynamics and associated risks, demonstrating the importance of directly considering hydraulic structures and their operations in 2D high-resolution urban flood modelling.</p><p></p>

The economic impacts of Climate Change to flood risk across the Central Asia Regional Economic Cooperation (CAREC)

2021 ◽  
Author(s):  
Iain Willis ◽  
Alex Shao ◽  
Sarah Optiz-Stapleton
Keyword(s):  
Climate Change ◽  
Central Asia ◽  
Flood Risk ◽  
Regional Climate ◽  
Flood Event ◽  
Quantile Mapping ◽  
Autonomous Region ◽  
Change Factors ◽  
Time Horizons ◽  
Intensity Duration Frequency

<p>This case study documents the application of multi-RCM derived Intensity-Duration-Frequency (IDF) curves to assess the changing nature of probabilistic flood risk in the CAREC region at future time horizons.</p><p>In this study, multi-model precipitation extremes under RCP4.5 and RCP8.5 at future climate horizons (e.g. 2040s and 2070s) are used to derive alternative views of flood risk and damage potential across the eleven countries (Afghanistan, Azerbaijan, China (Inner Mongolia Autonomous Region; Xinjiang Uyghur Autonomous Region), Georgia, Kazakhstan, Kyrgyz Republic, Mongolia, Pakistan, Tajikistan, Turkmenistan and Uzbekistan) within the Central Asia Regional Economic Cooperation (CAREC).</p><p>Multiple regional climate model (RCM) daily precipitation data from the Coordinated Regional Climate Downscaling Experiment (CORDEX) are first bias corrected through non-parametric quantile mapping. Quantile mapping is an approach used to reduce systematic biases in RCM precipitation, particularly extremes, by adjusting the historical modeled precipitation distributions against observations and carrying the transformation forward to adjust future projections. The bias-corrected projections are used to derive sub-country level Intensity-Duration-Frequency (IDF) curves before being combined with a 10,000 year stochastic simulation of river and surface water flood event set to derive change factors in baseline hydrology for river gauges and gridded precipitation points across Central Asia. These change factors have been used to create a series of alternative stochastic flood event sets for the various time horizons and emission scenarios, which in turn, are then analysed against the GED4ALL economic exposure data and a detailed taxonomy of fragility curves to assess the economic impact of climate change in all CAREC countries. The study captures the complex and non-linear relationship between climate change and flood risk across a diverse continent. In turn, focus is given to how these findings may affect key global planning horizons with regard to disaster risk financing and sustainable development. </p>

scholarly journals Adaptation to flood risk: Results of international paired flood event studies

2017 ◽  
Vol 5 (10) ◽  
pp. 953-965 ◽  
Author(s):  
Heidi Kreibich ◽  
Giuliano Di Baldassarre ◽  
Sergiy Vorogushyn ◽  
Jeroen C. J. H. Aerts ◽  
Heiko Apel ◽  
...  
Keyword(s):  
Flood Risk ◽  
Event Studies ◽  
Flood Event

scholarly journals The role of household adaptation measures in reducing vulnerability to flooding: a coupled agent-based and flood modelling approach

2020 ◽  
Vol 24 (11) ◽  
pp. 5329-5354
Author(s):  
Yared Abayneh Abebe ◽  
Amineh Ghorbani ◽  
Igor Nikolic ◽  
Natasa Manojlovic ◽  
Angelika Gruhn ◽  
...  
Keyword(s):  
Risk Management ◽  
Flood Risk ◽  
Policy Design ◽  
Economic Incentives ◽  
Flood Risk Management ◽  
Flood Event ◽  
Adaptation Measures ◽  
Agent Based ◽  
Modelling Approach

Abstract. Flood adaptation measures implemented at the household level play an important role in reducing communities' vulnerability. The aim of this study is to enhance the current modelling practices of human–flood interaction to draw new insights for flood risk management (FRM) policy design. The paper presents a coupled agent-based and flood model for the case of Hamburg, Germany, to explore how individual adaptation behaviour is influenced by flood event scenarios, economic incentives and shared and individual strategies. Simulation results show that a unique trajectory of adaptation measures and flood damages emerges from different flood event series. Another finding is that providing subsidies increases the number of coping households in the long run. Households' social network also has a strong influence on their coping behaviour. The paper also highlights the role of simple measures such as adapted furnishings, which do not incur any monetary cost, in reducing households' vulnerability and preventing millions of euros of contents damages. Generally, we demonstrate that coupled agent-based and flood models can potentially be used as decision support tools to examine the role of household adaptation measures in flood risk management. Although the findings of the paper are case-specific, the improved modelling approach shows the potential to be applied in testing policy levers and strategies considering heterogeneous individual behaviours.

scholarly journals ENVIRONMENTAL LOSS EVALUATION APPROACH FOR COASTAL FLOOD RISK ANALYSIS

2020 ◽  
pp. 14
Author(s):  
Dilani R. Dassanayake ◽  
Hocine Oumeraci
Keyword(s):  
Risk Analysis ◽  
Flood Risk ◽  
Flood Event ◽  
New Approach ◽  
Coastal Flood ◽  
Evaluation Approach ◽  
Flood Risk Analysis ◽  
Coastal Flood Risk ◽  
Environmental Loss ◽  
Potential Losses

Flood risk is generally defined as the combination of the probability of a flood event and the potential losses. Flood losses might be divided in two categories, namely tangible and intangible. Tangible losses are evaluated in monetary values and hence commonly incorporated in flood risk analysis. Intangible losses, especially environmental losses, are mostly not incorporated in flood risk analysis due to the lack of appropriate and generally accepted evaluation methods. This research focuses on the development of a new approach to evaluate environmental losses due to coastal floods.Recorded Presentation from the vICCE (YouTube Link): https://youtu.be/xyiwlw3jkYo

scholarly journals Incorporating Uncertainty of the System Behavior in Flood Risk Assessment—Sava River Case Study

Water ◽  
2020 ◽  
Vol 12 (10) ◽  
pp. 2676
Author(s):  
Toni Kekez ◽  
Snježana Knezić ◽  
Roko Andričević
Keyword(s):  
Flood Risk ◽  
Flood Event ◽  
Sources Of Uncertainty ◽  
Emergency Managers ◽  
Time Period ◽  
Safe Area ◽  
Sava River ◽  
Different Sources

This paper proposes a framework for evaluation of the sources of uncertainty that can disrupt the flood emergency response process. During the flood response, flood emergency managers usually choose between several decision options under limited available lead-time, but they are often compelled with different sources of uncertainty. These sources can significantly affect the quality of decisions related to adequate response and rapid recovery of the affected system. The proposed framework considers efficient identification, integration, and quantification of system uncertainties related to the flood risk. Uncertainty analysis is performed from a decision-maker’s perspective and focused on the time period near and during the flood event. The major scope of proposed framework is to recognize and characterize sources of uncertainty which can potentially appear within the behavior of the observed system. Using a Bayesian network approach, a model is developed capable for quantification of different sources uncertainty in respect to their particular type. The proposed approach is validated on the Sava River case study, in the area of the city of Slavonski Brod, following the destructive 2014 flood event. The results indicate that, despite improvements of structural measures, the weir failure can still cause flooding of the approximately 1 km2 of otherwise safe area, resulting in the increased flood risk.

scholarly journals Flood risk in past and future: A case study for the Pawtuxet River's record‐breaking March 2010 flood event

2020 ◽  
Vol 13 (4) ◽  
Author(s):  
Soroush Kouhi ◽  
M. Reza Hashemi ◽  
Rozita Kian ◽  
Malcolm Spaulding ◽  
Matthew Lewis ◽  
...  
Keyword(s):  
Flood Risk ◽  
Flood Event
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