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Climatic changes can cause unpredictability in flood regimes that traditional flood risk management (FRM) approaches may struggle with. Therefore, flood resilience is seen as a supplementation to these approaches, putting a larger emphasis on flood acceptance and minimising consequences. An (emergent) group contributing towards flood resilience is civil society. This paper examines how civil society contributions can be furthered and guided in the Netherlands as well as exploring potential limitations in doing so. To achieve this, England is used as a good practice example due to a more developed and defined role for civil society being present here. Data were collected on both actual (England and the Netherlands) and potential (The Netherlands) civil society contributions. These were compared to identify potential avenues for Dutch civil society contributions to flood resilience that can be further investigated. The research shows that the most promising avenues are improving advocacy from citizens, improving local flood awareness and developing relationships between FRM authorities and existing citizen groups that can be harnessed and mobilised to support flood resilience. Additionally, the research also provides insights into potential limitations for transferring resilience approaches from one context to another beyond the cases discussed in this publication. [ABSTRACT FROM AUTHOR]

With more intense rainfall and sea level rises predicted, an increasing number of people across the UK are vulnerable to flood events. The government has pledged more funding for flood infrastructure planning, design and management. However, schemes tend to focus on technical solutions, with the social impact, including needs and concerns of the local community, seen as secondary. Based on a detailed examination of three case studies in England, this paper identifies the mechanisms through which current processes restrict industry professionals from considering and incorporating the social perspective, often despite seemingly effective community engagement. The paper argues for an approach that incorporates social concerns alongside technical ones. Rather than 'community engagement', it is argued that 'co-production', in which lay communities work alongside technical experts in the design of flood risk alleviation schemes, would enable a final outcome that is both more socially acceptable and more technically successful. [ABSTRACT FROM AUTHOR]

Non-stationary methods of flood frequency analysis are widespread in research but rarely implemented by practitioners. One reason may be that research papers on non-stationary statistical models tend to focus on model fitting rather than extracting the sort of results needed by designers and decision makers. It can be difficult to extract useful results from non-stationary models that include stochastic covariates for which the value in any future year is unknown. We explore the motivation for including such covariates, whether on their own or in addition to a covariate based on time. We set out a method for expressing the results of non-stationary models as an integrated flow estimate, which removes the dependence on the covariates. This can be defined either for a particular year or over a longer period of time. The methods are illustrated by application to a set of 375 river gauges across England and Wales. We find annual rainfall to be a useful covariate at many gauges, sometimes in conjunction with a time-based covariate. For estimating flood frequency in future conditions, we advocate exploring hybrid approaches that combine the best attributes of non-stationary statistical models and simulation models that can represent changes in climate and river catchments. [ABSTRACT FROM AUTHOR]

Coastal communities and their environments are facing unprecedented changes, with climate change driving rising global mean sea level, exacerbating extreme sea level events, and increasing hazards. Whilst adaptations to change have been central to coastal life for millennia, climate change brings a speed and intensity of change not previously experienced. Researchers are noting that adaptations are needed that are large scale and systemic with significant changes to lives and livelihoods – Transformational Adaptations – yet there is little evidence of this in practice, and there remains an operationalisation gap between ambitions and actions. This paper uses a qualitative case study method to assess how existing policy may enable and inhibit local stakeholder involvement in transformational adaptation in English coastal flood and erosion risk management. Through twenty interviews with coastal management stakeholders, the capacity for local coastal management stakeholders to initiate transformational adaptation and the perceived involvement of residents are analysed. The results indicate that transformational adaptation remains a distant aspiration in the English coastal management system, with local stakeholders possessing limited capacity to initiate it. The perceived role for residents in adaptation processes is often focused on their being recipients of adaptation interventions, and there are a range of barriers to their further involvement. The paper concludes that despite the theoretical interest in transformational adaptation, there is limited evidence its implementation in English coastal flood and erosion risk management, and there are multiple priority areas for policy development to support capacity for engaged transformational adaptation practices in coastal management contexts. • There are few examples of transformational adaptation in the English coastal flood and erosion risk management. • The perceived role for residents in adaptation processes is often focused on their being recipients of interventions. • There are a range of barriers for local stakeholders to develop and enact coastal adaptation policy or practice. • There are multiple priorities for policy development to support capacity for engaged transformational adaptation practices. [ABSTRACT FROM AUTHOR]

This paper focuses upon the new landscape of strategic coastal planning and implementation in England and Wales resulting from the development of shoreline management plans (SMPs) by flood and coastal erosion risk management (FCRM) authorities; the issues raised will be very familiar elsewhere in the world. The real test is how to implement the many measures and management decisions within these SMPs. In many cases, those decisions were difficult to reach; sometimes the result was an uneasy agreement to maintain defences indefinitely, if the funding is available; elsewhere, bold decisions were taken to withdraw maintenance using the 'no active intervention' SMP policy option. This policy is often paraphrased as 'do nothing', but in reality it is usually far from being a passive exercise. Depending on the circumstances and rationale for not intervening, it may entail a lot of work and have many implications. What is the nature of current intervention? Are there existing FCRM assets in place, and if so, will they be dismantled or left to disintegrate? Either way, potential impacts upon public health and safety, the natural environment, coastal processes, amenity and local communities and businesses need attention, and the exercise needs careful planning and engagement. There may be other options to consider, such as the 'localisation' or transfer of assets, and management of them, to third parties - but what are the liabilities associated with this and is it sustainable? A well-planned decommissioning of assets that is written into a SMP in advance is more likely to address these implications successfully, whereas a withdrawal from maintenance in the teeth of local opposition despite an original intention to defend may become complicated. The FCRM community needs to be prepared for these decisions and their consequences in advance. Additionally, is 'no active intervention' compliant with European law? The Environment Agency and the Department for Environment, Food and Rural Affairs are working with local authorities and other partners on a number of initiatives that will clarify issues, review experience and provide simple, practical guidance to risk management authorities faced with implementing a 'no active intervention' option. This paper will highlight the results and products of some of these initiatives and reflect more widely on the 'deliverability' of SMPs as they stand. 'Doing nothing' at the coast is clearly less relaxing than it sounds. [ABSTRACT FROM AUTHOR]

Globally, flood frequency has increased over the last three decades. Natural Flood Management (NFM) is considered a progressive holistic flood management approach, using "natural" hydrological processes to slow and store water, delivering multiple benefits including water quality, biodiversity and amenity improvements. Although there are existing evaluations of NFM, they remain insufficient for drawing conclusions as to its effectiveness at catchment scales. However, without this evidence base and because of the domination of the natural sciences in the framing and research agenda, catchment‐wide interventions have not been implemented. In acknowledging the importance of understanding and data gaps (and attempts to fill them), this paper argues that there is an opportunity to deliver NFM more widely by capitalising on widespread interest in different land and water management sectors, supported by interdisciplinary policy‐relevant research. This paper illustrates how multi‐stakeholder collaborative partnership is suited to the dynamic complexity of NFM delivery. It is proposed that, through championing NFM delivery at catchment scales and the work of established catchment partnerships in England and Wales, there is the opportunity to more widely deliver NFM as an integrated component of flood risk management. [ABSTRACT FROM AUTHOR]

As the Sendai framework recognises, understanding the nature and severity of risk is an important prerequisite to sensible risk reducing measures. The UK has been in the forefront of assessing the scale of flood risk at a national level to inform investment and policy directions but the scale of this risk, as modelled, has reduced since 2014. This paper compares the most recent modelled version of national flood risk, in the form of the Environment Agency's State of the Nation report, with loss figures quantified in terms of insurance claims data for the period 1998 to 2018. Depending on assumptions, the results show that the modelled results are between 2.06 and over 9.0 times the comparable flood losses measured in terms of the compensation paid to flood victims by insurance companies. The reasons for these differences remain unclear but several possibilities are reviewed. Many of these reasons appear implausible, but the divergence between the two sets of results should encourage the users of this data to consider carefully their assessments of the true scale of flood risk that the country faces, and perhaps promote similar comparisons in other countries. [ABSTRACT FROM AUTHOR]

In academic and professional circles, 'resilience thinking' has emerged as the dominant paradigm in flood risk management, which emphasizes the need to plan and design cities that can absorb water and replicate natural processes more closely. In this paper, we explore how planners in England are expected to respond to the resilience agenda against the realities in practice, zoning in on the delivery of sustainable (urban) drainage systems (SuDS). Our exploration highlights that, while SuDS are being implemented, they are largely characterized by a 'bog standard' design. We found that there are three main institutional factors that are constraining the implementation of SuDS: the lack of legislative backing, the power afforded to private commercial interests in the neoliberalized planning process, compounded by the severe lack of resources in local authorities. What is missing at the moment is SuDS process and design that is flexible, integrated, collaborative and innovative. There are clear implications that, without the necessary institutional support, resilience thinking will remain largely aspirational, and professionals will struggle to gain traction and translate the larger flood resilience policy agenda into England's future climate-resilient places. This article is part of the theme issue 'Urban flood resilience'. [ABSTRACT FROM AUTHOR]

Not only has the frequency and severity of flooding increased under climate change, but which communities are at-risk and how those risks are distributed within communities has changed too. This realisation points to an important interplay between exposure (risk) and social vulnerability. Who is vulnerable? Answering this question is far from straightforward as different vulnerability indicators identify different groups across different scales. This paper addresses this issue. Using the empirical case of England, the spatial distribution of flood risk at different administrative scales is analysed in relation to the Environment Agency (EA) allocation of flood funding between 2015 and 2021. We find that Upper-tier Local Authority Districts with higher levels of both flood risk and social vulnerability received more funding in the period considered. Yet, that is not the scale at which flood scheme funding decisions are made. Flood schemes are decided at the local level, but funding data for smaller administrative scales is not available. Different understandings of vulnerability, the Modifiable Areal Unit Problem (MAUP), and issues around data transparency and availability in flood risk management, need to be urgently addressed. • This study critically analyses four indexes for quantifying flood vulnerability in England. • We find that vulnerability is interpreted differently depending on the indicators and spatial scales used. • The EA cannot fully monitor the relationship between vulnerability and funding without making LSOA data available. • Where LSOA data is unavailable, vulnerability indexes that are consistent across different areal units are more 'useful'. [ABSTRACT FROM AUTHOR]

Here, we investigate whether England's 152 local flood risk management strategies (LFRMSs) satisfy minimal legislative criteria and address the growing surface water flood (SWF) risk caused by climate change. A systematic audit was used to assess the alignment of the LFRMSs with national climate change legislation and other relevant national strategies. An objective method to identify inclusion of a range of factors that good strategies should include was applied. LFRMSs are mostly meeting their minimum statutory requirements. However, there is a widespread issue across most LFRMSs regarding inadequate consideration of increasing SWF risk from climate changes, which highlights the need for enhanced LFRMSs by improved planning and climate change adaptation plans. There is some evidence of good practice within the LFRMS portfolio, which is discussed in the context of the ongoing LFRMS update process. Beyond England, there are implications for developing FRM processes at a local level that can be objectively assessed against national requirements. Communities in England face inadequately managed SWF risk in the future because of the range in plan quality across the LFRMSs. This research contributes to the ongoing examination of the full suite of 152 LFRMSs and, therefore, builds towards a complete assessment of the SWF management approach in England. This will help inform local climate change adaptation strategies that cater to the escalating threat of SWF due to climate change. [ABSTRACT FROM AUTHOR]

This paper examines the parallel discourses of 'lost' local flood expertise and the growing use of commercial consultancies to outsource aspects of flood risk work. We critically examine the various claims and counter-claims about lost, local and external expertise in flood management, focusing on the aftermath of the 2007 floods in East Yorkshire, England. Drawing on interviews with consultants, drainage engineers and others, we caution against claims that privilege 'local' floods knowledge as 'good' and expert knowledge as somehow suspect. This paper urges carefulness in interpreting claims about local knowledge, arguing that it is important always to think instead of hybrid knowledge formations. We conclude by arguing that experiments in the co-production of flood risk knowledge need to be seen as part of a spectrum of ways for producing shared knowledge. [ABSTRACT FROM AUTHOR]

Flooding is one of the UK's biggest risks, and changes to our climate with predictions of warmer, wetter and stormier winters will increase the risk further. The Environment Agency's National Flood and Coastal Erosion Risk Management Strategy for England (2020) sets out ambitions to create climate resilience places and infrastructure for today's and tomorrow's climate. It works to the vision of 'a nation ready for, and resilient to, flooding and coastal change — today, tomorrow and to the year 2100'. Among many objectives set out, the strategy commits risk management authorities to mainstream the use and take-up of property flood resilience (PFR) — that is, those measures that aim to reduce the amount of water entering a property, and those adaptations that can be made to reduce damage if it does enter. The PFR sector has evolved over the last decade with varying success, limited uptake and perceptions of 'failure' through poor workmanship and an absence of guidance. In 2021 a new Code of Practice (CoP) was published, providing guidance on six standards: hazard assessment, property survey, options development, construction, commissioning and handover, and operation and maintenance. This paper explores the objective of the Code, its benefits and limitation, highlighting that while the Code remains voluntary, growing awareness and application by risk management authorities such as the Environment Agency (EA) and lead local flood authorities will help drive up standards. Consistent delivery to acceptable standards will meet homeowner and insurer needs, thereby building a body of evidence of successful delivery and outcomes. [ABSTRACT FROM AUTHOR]

This paper examines the impact of flood risk on the value of English residential properties. We find that a location within a flood zone significantly lowers property values even if we control for the proximity to a watercourse, the history of flooding and neighbourhoods effects. Although the flood risk discount is more compelling for waterfront properties, it is still highly significant for dwellings further from the water. The markdown arises around 2004-2005, which coincides with the publication of detailed flood maps by the UK Environment Agency and with a more risk-based pricing of flood insurance policies. As expected, the effect of flood risk on house prices is stronger in the months following major flood events but, interestingly, it almost disappears in a hot market when buyers have arguably less negotiating power. [ABSTRACT FROM AUTHOR]

Abstract: Following extensive surface water flooding (SWF) in England in summer 2007, progress has been made in improving the management and prediction of this type of flooding. A rainfall threshold‐based extreme rainfall alert (ERA) service was launched in 2009 and superseded in 2011 by the surface water flood risk assessment (SWFRA). Through survey responses from local authorities (LAs) and the outcome of workshops with a range of flood professionals, this paper examines the understanding, benefits, limitations and ways to improve the current SWF warning service. The current SWFRA alerts are perceived as useful by district and county LAs, although their understanding of them is limited. The majority of LAs take action upon receipt of SWFRA alerts, and their reactiveness to alerts appears to have increased over the years and as SWFRA superseded ERA. This is a positive development towards increased resilience to SWF. The main drawback of the current service is its broad spatial resolution. Alternatives for providing localised SWF forecast and warnings were analysed, and a two‐tier national‐local approach, with pre‐simulated scenario‐based local SWF forecasting and warning systems, was deemed most appropriate by flood professionals given current monetary, human and technological resources. [ABSTRACT FROM AUTHOR]

Natural flood management (NFM) involves measures to restore and protect natural hydrology and geomorphology to minimise flood risk. NFM is promoted as part of the nation's flood resilience response. Government agencies have created national maps of opportunities for specific NFM measure to target available grant aid and encourage landowners and managers to deliver effective NFM measures where most needed. Mapping opportunities within a regulatory framework ensures that measures are targeted towards areas with a presumption of suitability thus minimising the burden of the application process. The viability of NFM depends on the responsible authority and community at risk accepting the proposed measures as both effective and appropriate. Top-down initiatives can fail to meet their targets when landowners and managers feel left out of the decision making and their experiential local knowledge is at odds with the spatial prioritisation derived from national datasets. This interdisciplinary paper assesses the applicability of a technical-based national mapping approach with local stakeholders for identifying opportunities for woodland and runoff management measures to reduce flood risk within the lowland catchments of the West Thames River Basin, in southern England. Farmer surveys supported the technical map in terms of targeting areas of deep clay and silt soils over mudstone as high priority for improved land and soil management to reduce rapid runoff. However, while incentives correctly target the problem areas, farmers desired greater flexibility in choice of NFM measures to reflect local soil knowledge and the sustainability of management practices within farm systems. It is argued that a more integrated and co-designed mapping approach would enhance NFM uptake and thus achieve a greater reduction in downstream flood risk. • This paper assesses the relevance of national maps to identify opportunities for NFM in lowland agricultural catchments. • Farmers' experiential knowledge confirm the map correctly target areas with soils prone to degradation and surface runoff. • The farmers favoured soil-based NFM measures that support continued agricultural use such as cover crops and minimal tillage. • Farmers were resistant to woodland creation incentives and would prefer more support for soil and land management practices. • Our study highlights the need for co-development of NFM incentives to aid delivery of national policy [ABSTRACT FROM AUTHOR]

Flood maps play an increasingly prominent role in government strategies for fl ood-risk management. Maps are instruments not just for defi ning and communicating fl ood risks, but also for regulating them and for rationalizing the inevitable limits and failures of those controls. Drawing on policy document analysis, offi cial statistics, and 66 key-informant interviews, this paper explores the institutional confl icts over the use of the Environment Agency (EA) Flood Map to support decision making by English local planning authorities (LPAs), whose local political mandate, statutory obligations, and professionalized planning culture put them at odds with the narrower bureaucratic imperative of the Agency to restrict developments at risk of fl ooding. The paper shows how the Flood Map was designed to standardize and script the planning process and ensure that LPA decisions were aligned with EA views about avoiding development in zones at risk of fl ooding without actually banning such development outright. But technologies are also shaped by their users, and so the paper documents how planners accommodated and resisted this technology of indirect rule. Their concerns about sterilizing areas depicted as being at risk of fl ooding and about the diffi culties of actually using the Flood Map for speedy and defensible development-control decisions were crucial in its eventual replacement by a new decision-support technology, Strategic Flood Risk Assessments, which then led to the descripting of the Flood Map to infl uence a new set of users: the public. The paper closes with some wider refl ections on the signifi cance of the case for risk-based governance. [ABSTRACT FROM AUTHOR]

National implementation of the Floods Directive required the member states to each designate a 'competent authority'. This raises the question of what are the necessary competencies of the designated authority and what are the necessary powers required to deliver the directive. A fundamental problem in water governance is the 'vertical-horizontal problem' of integration but rules necessarily fragment and water management is highly coupled with many other policy areas. This paper reviews how the emphasis on vertical and horizontal integration in flood risk management has evolved over time and argues that vertical integration has been promoted at increasing cost to horizontal integration. [ABSTRACT FROM AUTHOR]

Published sources claim that 'one in six' properties are at overall flood risk in England and Wales. However, an attempt to replicate that proportion using publicly available data proved difficult, estimating one in five properties in England and one in four properties in Wales at overall flood risk, and even higher risk estimates for non-residential properties alone, especially in Wales. For comparative purposes, a primary analysis was conducted which found that the estimated fluvial and tidal flood risk for properties (residential and non-residential) is one in twelve in England and one in nine in Wales. Discussions include the importance of the unit of analysis (people/properties) and also of property type (households/businesses). This paper reveals several discrepancies in published data and proportions at risk, and will emphasise that if 'good evidence' is needed to inform policy, then we need to be very specific about what kinds of risk, and to whom, we are reporting. [ABSTRACT FROM AUTHOR]

It is widely recognised that coastal flood events can arise from combinations of extreme waves and sea levels. For flood risk analysis and the design of coastal structures it is therefore necessary to assess the joint probability of the occurrence of these variables. Traditional methods have involved the application of joint probability contours, defined in terms of extremes of sea conditions that can, if applied without correction factors, lead to the underestimation of flood risk and under-design of coastal structures. This paper describes the application of a robust multivariate statistical model to analyse extreme offshore waves, wind and sea levels around the coast of England. The approach described here is risk based in that it seeks to define extremes of response variables directly, rather than the joint extremes of sea conditions. The output of the statistical model comprises a Monte Carlo simulation of extreme events. These distributions of extreme events have been transformed from offshore to nearshore using a statistical emulator of a wave transformation model. The resulting nearshore extreme sea condition distributions have the potential to be applied for a range of purposes. The application is demonstrated using two structures located on the south coast of England. [ABSTRACT FROM AUTHOR]

The purpose of the paper is to investigate how local level flood policies consider Natural Flood Management (NFM) as a risk reduction mechanism in England. Methods used include a review of European and English national legislative and other flood management policy instruments as well as a case study of Cumbria County's local flood management policies. The legislative and other policy instruments at both European and English national level demonstrated increasing level of NFM consideration for local flood risk management. In Cumbrian context, flood management policies are mostly aligned to the traditional structural defence-based approach; however, emergence and importance of non-structural measures including NFM are clearly evident, are visibly influenced by the European and national policies. The numbers of potential NFM actions in local flood policies are nonetheless insignificant compared to the NFM potentials, but these can be worked in as a starting point for wider scale consideration and implementation. [ABSTRACT FROM AUTHOR]

The new flood risk policy discussion in England has started to redefine national policy regarding flood and coastal risk management. The key issue in the new policy agenda is to encourage the responsibilities of local authorities in flood risk management, which involve defining local strategies to manage local risks. This downscaling process in flood risk management has a series of consequences in the development of new governance structures and institutions as well as new working relations and intervention strategies. Nevertheless, the main problem is the gap between the downscaling of responsibility and the transfer of resources; in particular the question concerning funding and social capacity. In this way, the focus of policy discussion refers to two main aspects: (a) the equitable sharing of risk-burdens between public authorities, private companies and individuals and (b) how to encourage government agencies and nongovernment agents to take over responsibility for certain tasks from central government. The aim of this paper is to discuss the new funding regime for English flood risk management policy under the new policy paradigm. [ABSTRACT FROM AUTHOR]

• We develop a framework for analysing the role of Science Policy Interfaces in Flood Risk Governance. • We apply this framework to England, France and the Netherlands using policy analysis and stakeholder interviews. • SPIs help diversify FRM; increase their connectivity, facilitate decentralisation of FRM and foster inter-country learning. • SPIs can steer FRG, either along existing pathways, or towards new and potentially transformative change. • SPIs are an underexposed factor explaining dynamics in flood risk governance which merits more systematic empirical study. In the face of increasing threats from flooding, there are growing calls to strengthen and improve arrangements of flood risk governance (FRG). This endeavour requires an appreciation of the multitude of factors stabilising and driving governance dynamics. So-called catalyst flood events, policy champions and advocacy coalitions have tended to dominate this study to date, whilst the potential role played by Science Policy Interfaces (SPIs) has been somewhat neglected and often approached in a reductionist and fragmented way. This paper addresses this gap by drawing from in-depth policy analysis and stakeholder interviews conducted within England, France and the Netherlands under the auspices of the EU-FP7 STAR-FLOOD project. The analysis reveals four prominent ways in which SPIs shape FRG, by i) facilitating the diversification of Flood Risk Management (FRM) strategies; ii) increasing their connectivity, iii) facilitating a decentralisation of FRM and iv) fostering inter-country learning. It identifies different roles of specific interfaces (structures) and interfacing mechanisms (processes) in shaping governance dynamics. This way, the analysis reveals various 'entry points' through which SPIs can steer FRG, either along existing pathways, or towards new and potentially transformative change. The study shows that SPIs are a hitherto underexposed factor explaining dynamics in flood risk governance which merits additional systematic empirical study. [ABSTRACT FROM AUTHOR]

Between 2004 and 2008 the city of Worcester, UK experienced a number of pluvial flood events. The causes of this kind of flooding are the topic of ongoing research. This paper describes a study that aimed to investigate the urban development of Worcester over time in relation to the location of recorded pluvial flood incidents. A novel rapid mapping method has been developed to derive urban development over five time periods between 1886 and 1995 from scanned Ordnance Survey historical maps. The technique compared well with manual digitisation results with k-hat values ranging from 0.67 to 0.87 for the land use maps created for different time periods. The technique performed least well for the oldest map series, due to misclassification of the abundant symbols and annotation. The method will be particularly beneficial for investigation of town/city development in time over large areas. The resulting map of urban development in Worcester (scale 1:20,000) shows that almost half of the recorded pluvial flood incidents occurred in areas developed between 1956 and 1975, which contradicts local belief that an outdated (Victorian) drainage system causes most of the problems. The quality of the post World War II developments is more likely to be a source for concern. [ABSTRACT FROM AUTHOR]

A UK Cabinet Office review after the 2007 floods highlighted different types of knowledge needed for effective flood risk management, along with knowledge gaps. This paper explores key, emerging aspects of this expanded knowledge base, namely relationships between expert and local/lay knowledges, the changing nature of local knowledge of community flood risk, and how attempts are being made to incorporate local knowledge into science, policy and practice. Sustainable flood knowledge, as an aspiration, integrates expert, local and political knowledge to build community flood resilience. The research involved stakeholder interviews undertaken before and after the 2007 floods, Severn catchment, UK and examination of policy documentation. The paper focuses on scale issues in relation to knowledge types suggesting that local knowledge can be 'expert' in large-scale mapping of flood processes. It reflects on how local flood knowledges can be captured, shared, harnessed and used, and assimilated into governance structures for flood resilience planning. The paper recognises progress in integrating local knowledges in flood science and governance, but also highlights challenges. It concludes that the 2007 UK flood experience is generating new understandings of the value of local knowledges, and how these might be successfully used in flood risk management practice. [ABSTRACT FROM AUTHOR]

This paper explores the environmental inequalities of living in the floodplains of England and Wales and the differences in flood awareness of those 'at risk'. An area comparison is made between an etic, objective flood risk exposure, and an emic, subjective perception of that risk by social class. In all areas except the Midlands, the working classes were more likely to reside in the floodplains; the greatest exposure inequality is seen in the North East and Anglian regions. Flood awareness in the Anglian regions was much lower than average, but there were no significant class differences. In the Thames region, despite equal flood risk exposure between classes, the most deprived displayed the least awareness of flood risk. In the North East, inequalities in the distribution of flood risk exposure accompanied inequalities in perception, resulting in the least aware and most deprived experiencing the greatest flood risk. [ABSTRACT FROM AUTHOR]

Abstract The last ten years have witnessed increasing levels of concern and public debate about the risks associated with environmental hazards such as flooding in the UK and the likelihood that these will increase in frequency due to anthropogenic climate change. In this paper, we argue that attempts to mitigate this process through a focus on individualised risk communication and behavioural change are unlikely to be successful, given the epistemic conflicts surrounding climate change knowledges in public discourse. In response, we argue for an alternative framework for developing environmental knowledges, using social learning to promote both epistemic re-alignment and a re-scaling of environmental governance that promotes enablement. We use insights from research on flooding in South West England to highlight the ways in which traditional policy approaches such as behavioural change have come to be so overbearing in public debate on environmental hazards management. In contrast, we demonstrate the potential for a re-scaling of environmental governance to reconfigure climate change knowledge and build new spaces for enablement to reduce hazard vulnerability at the place-based community scale. We argue that this has major epistemological and practical implications for the ways that researchers and policy makers work with publics to reduce hazard risk under a changing climate. [ABSTRACT FROM AUTHOR]

There is unequivocal evidence that global sea levels are rising. It is therefore inevitable there will be socioeconomic impacts as a result of this. To aid mitigation, and the implementation of adaptation measures, it is vital the magnitude of the potential impact is quantified. Current approaches in the UK make simplifying assumptions regarding the relationship between present-day and future economic damage relating to coastal flood risk. The analysis undertaken here supports studies of an improved impact of sea level rise by providing national-scale estimates of changes in wave overtopping rates and flood defence overflow rates, as a result of different amounts of sea level rise. The analysis involves the application of components of an existing risk-based coastal flood risk analysis method. A subset of almost 600 flood defence assets around the country has been analysed for sea level rise rates up to 1 m. The resulting analysis shows that, on average, the wave overtopping rate increases by up to 150 times above present-day rates for lower return periods and by up to five times for higher return periods. This differential arises as a result of non-linearities in overtopping rates with increasing extreme sea levels. [ABSTRACT FROM AUTHOR]

Floods have become the most prevalent and catastrophic natural hazard that plagues cities worldwide. As an inherent characteristic of an urban system that reflects the degree of effect of flooding and the capacity to cope with it, urban flood vulnerability is of great significance when analyzing and managing flood disasters. To produce a better profile of the current status and the development trend of urban flood vulnerability research, this study conducted a bibliometric analysis using CiteSpace software based on 1134 articles sourced from the Web of Science Core Collection database. The results showed that the annual publication number exhibited an ascending trajectory, which was characterized by three stages: the sprouting stage, the stable development stage and the rapid development stage. The United States, China and England were the most productive countries. Among the top co-cited journals were Natural Hazards, Natural Hazards and Earth System Science, Global Environmental Change and the Journal of Hydrology. In addition, the focus of this research can be succinctly summarized as vulnerability assessments and mapping, the impact of climate change and urbanization on urban flood vulnerability and the integration of urban flood vulnerability with flood risk and urban resilience. This study presents a comprehensive analysis of the current status and development trends of research related to urban flood vulnerability, and it contributes an understanding of the key areas of focus in this field as well as insights into potential prospects for future investigation for researchers and practitioners. [ABSTRACT FROM AUTHOR]

Reanalysis datasets are increasingly used to drive flood models, especially for continental and global analysis and in areas of data scarcity. However, the consequence of this for risk estimation has not been fully explored. We investigate the implications of four reanalysis products (ERA-5, CFSR, MERRA-2 and JRA-55) on simulations of historic flood events in five basins in England. These results are compared to a benchmark national gauge-based product (CEH-GEAR1hr). The benchmark demonstrated better accuracy than reanalysis products when compared with observations of water depth and flood extent. All reanalysis products predicted fewer buildings would be inundated by the events than the national dataset. JRA-55 was the worst by a significant margin, underestimating by 40 % compared with 14 %–18 % for the other reanalysis products. CFSR estimated building inundation the most accurately, while ERA-5 demonstrated the lowest error in terms of river stage (29.4 %) and floodplain depth (28.6 %). Accuracy varied geographically, and no product performed best across all basins. Global reanalysis products provide a useful resource for flood modelling where no other data are available, but they should be used with caution due to the underestimation of impacts shown here. Until a more systematic international strategy for the collection of rainfall and flood impact data ensures more complete global coverage for validation, multiple reanalysis products should be used concurrently to capture the range of uncertainties. [ABSTRACT FROM AUTHOR]

Medieval city walls, bridges, and harbours stood at the interface between the worlds of man and nature. Wind, ice, rainwater, scour, tidal flows, littoral drift, erosion, silting, micro-organisms, and the growth of vegetation compromised the integrity of structural fabrics and choked up ditches, rivers, and harbour basins. These 'slow disasters' of incremental degradation were periodically punctuated by 'fast disasters' such as devastating floods or violent gales. To keep their public works from falling into ruin, civic authorities had to devise regular maintenance regimes and tackle intermittent large-scale repairs. Infrastructure sustainability became a particularly acute problem during the late middle ages. Climate change accelerated the intensity and frequency of environmental stressors, while urban populations declined in the wake of the Black Death. Economic disruptions were driving up the costs of building materials and labour while the customary sources of infrastructure incomes were shrinking. The growing mismatch in scale between rising infrastructure costs and falling resources was not just another wobble that could be corrected by a renewed mobilisation of traditional recovery mechanisms. [ABSTRACT FROM AUTHOR]

Coastal flood maps covering the whole European continent have become available in recent years. However, their ability to complement or replace high‐resolution local flood maps was not investigated so far. In this paper we compare pan‐European estimates of extreme sea levels and coastal flood extents at given return periods with observations and high‐resolution reference maps. The analysis is done for two pan‐European assessments and one global study. We find that whereas the models have good accuracy in estimating storm surge heights, large disparities exist between the large‐scale flood maps and four local maps of flood extents from England, the Netherlands, Poland, and France. Moreover, the accuracy of the underlying digital elevation model and assumptions about flood protection existing in a given area influence significantly the results. In addition, the first pan‐European projection of temporal trends in the size of flood zones is presented, with and without assuming flood protection levels. [ABSTRACT FROM AUTHOR]

The PlaceMarker Survey is an operational tool to support the delivery of the core aims of England's Environment Agency (EA) in helping to increase resilience to climate change, manage flood risk, and create a better place for people and wildlife. It was developed in response to a recognised need by the EA's National Environmental Assessment and Sustainability (NEAS) team for a broad-based survey undertaken in the field to get to know the site and prior to more specialist surveys. The key aim of the survey is to capture in a systematic and consistent way the character and condition of a place where river-related projects such as flood risk management and river restoration schemes are proposed to inform discussions around the design and planning of a project and provide the baseline for future place-based monitoring. The tool comprises: a Study Area Survey and one or more River Surveys, which provide measurements to generate metrics and information to support assessments of Habitat and Biodiversity, Landscape, Amenity, and Heritage. Data are stored, analysed, retrieved, shared, and displayed through a web-based information system. It is intended that a PlaceMarker Survey will be conducted on at least three occasions in the lifetime of a project or asset: pre-inception of a project to understand the broad environmental baseline and assist in the design of a scheme; immediately post-project to confirm the "as-built condition"; and post-recovery from the works to monitor the environmental response to interventions at the site. Tracking the assessments over time informs evaluations of environmental enhancements and supports decision-making around adaptive management. [ABSTRACT FROM AUTHOR]

There has been a noticeable shift in the way in which flood risks are managed in England. This is being driven in part by European developments but also by changes in governance across diverse domains of public policy. A key characteristic is a move to transfer responsibility for the management of flood risk away from the central government and towards the local level. This paper aims to describe and evaluate the potential implications of this shift by focusing on three connected policy areas: flood defence, spatial planning, and emergency management. We draw on an analysis of policy documentation and expert interviews to map out current changes in governance. We then outline a number of potential scenarios for how these changes may play out in the future, emphasising that differences in resource availability and local motivation could result in new patterns of vulnerability and inequality. [ABSTRACT FROM AUTHOR]

This paper challenges three assumptions common in the literature on expertise: that expertise is linearly derived from scientific knowledge; that experts always align with the established institutional order; and that expertise is a property acquired by individuals. We criticize these ideas by juxtaposing three distinct expert practices involved with flood risk management in England. Virtual engineering is associated with commercial consultancy and relies on standardized software packages to assess local flood inundation. Mathematical experimentation refers to academic scientists creating new digital renderings of the physical dynamics of flooding. Participatory modeling denotes research projects that aim to transform the relationships between experts and local communities. Focusing on different modes of modeling we contribute an analysis of how particular models articulate with specific politics of knowledge as experts form relationships with flood risk management actors. Our empirical study also shows how models can contribute to re-distribution of expertise in local flood risk management. [ABSTRACT FROM PUBLISHER]

Around the world coastal communities face an unprecedented challenge in responding to sea level rise and associated changes. For many responding through incremental adaptation may be appropriate (although not without limits). This may include progressively raising defences, nourishing beaches, and other conventional management measures. Such actions are well supported by existing governance structures and investment vehicles. For others however, continuing to provide protection from flooding may not be technically feasible or financially viable. For these communities, transformational adaptation will be needed (including realignment or relocation). Implementing transformational change, however, is difficult and requires a clarity of long-term planning and a means of supporting communities to take early action in making this transition. This paper explores the scale of the transformational challenge in England through to 2100. The combined influences of relative Sea Level Rise and the local lowering of the foreshore platform due to increased wave-driven surface erosion are considered. The realism of published shoreline policies (set out within England's Shoreline Management Plans) are assessed based on projected changes in flood risk and benefit-cost considerations. The assessment suggests 1,600–1,900 km (∼30%) of England's shoreline currently designated as a 'Hold-the-Line' policy is likely to see increasing pressure to realign (assuming a rise in Global Mean Surface Temperature of between 2 and 4 °C by 2100) with implications for ∼120,000–160,000 residential and non-residential properties by the 2050s. It is likely that a proportion of these properties will require relocation. It is not possible to say how many this will be. This will be a matter for government and the associated policy and funding priorities that will influence local outcomes. • Progress has been to embed 'incremental' adaptation in coastal plans, but a significant gap remains delivering 'transformational' change. • By the 2050s, a Hold-the-Line policy is likely to become increasingly difficult along 1,600–1,900 km of England's shoreline. • Consequently, ∼120-160,000 properties are likely to experience increased uncertainty as to their continued protection from coastal floodiing. • For some communities, climate change will have a profound, not marginal, impact and they will need support to implement transformational change. [ABSTRACT FROM AUTHOR]

This article addresses a major theme in fluvial geomorphology on which Professor Ken Gregory contributed much pioneering research, that of quantitative relations of morphological change to discharge variations. It examines the morphodynamics and processes of adjustment of river channels to flow characteristics on event to decadal timescales, using field and remote sensing data collected over a 40‐year period for a very active meandering reach of the River Bollin, northwest England. The free meandering and rapid rates of changes provide insight into response timescales and processes. Morphological variations and rates of change are analysed in relation to peak flow parameters. The results show that the sinuosity has continuously increased since a resetting of the planform by multiple cutoffs in 2001, this autogenic trend underlying the effects of flow events. Width of the channel has varied by 50% between map dates, corresponding to discharge characteristics of each 6‐year period and integrating the impacts of individual events. A trend of decrease in intensity of erosion and deposition and of narrowing for the period 2001–2019 is apparent and may be an indication of the recovery and adjustment time to the major morphological changes in 2001. Other possible influences include decline in sediment supply but no obvious external cause is identified. A feedback effect of lower process rates producing less sediment from banks which decreases rates of channel movement may be occurring. A major contributor to the process rate decline and narrowing could be an increase in riparian vegetation cover. Complex sequences of change between peak flow events emerge, unrelated to discharge magnitude or numbers of peak events, and a process of basal bank sedimentation followed by upper bank deposition is evident. Channel capacity varies by up to 30% year to year, which has major implications for variability of flood risk and floodplain inundation. [ABSTRACT FROM AUTHOR]

Land use changes, landscape modifications and changing climate have resulted in local to regional flood risk increases in recent decades. As an alternative to traditional engineering approaches, there has been a movement towards catchment‐based flood risk management, a subset of which is natural flood management (NFM). NFM aims to enhance flood resilience through the slowing and storing of runoff and flow, based on the restoration and augmentation of hydrological and morphological catchment features. However, despite research highlighting their potential benefits, there is a limited quantity of robust and science‐based empirical evidence on how these structures function in the landscape and their efficacy in reducing flood hazards. To address this knowledge gap and contribute to the growing NFM evidence base, this study evaluates the efficacy of offline water storage ponds for flow attenuation. Two contrasting pond sites in the Tone and Parrett catchment headwaters (SW‐England) were monitored from April 2018 to December 2020 for channel flow, pond volume, and rainfall. Field‐scale, high resolution (1.61 cm spatial support) digital elevation models from Structure‐from‐Motion and manual surveys were collected to quantify pond dynamics and connectivity. A comprehensive, storm definition methodology was developed for event separation, to enable quantification of the impact of pond behaviour on stream flow, across storm hydrographs. Results show that where offline ponds function as designed, with direct pond filling from the channel, peak flow attenuation can reach 7% (maximum event AEP of 83%). Smaller events, where pond filling occurs directly from rainfall or runoff display only a maximum of 3% peak flow reduction (event AEP from 83% –>99%). The ability of ponds to attenuate flow is heavily reliant on sufficient structural conditions for ponds to fill directly from the channel and to drain slowly following event peaks. This study provides an empirical database for future NFM applications, including key criteria for future design and for use as observational data in modelling applications, by upscaling the efficacy of ponds to reduce flood impacts at larger scales. [ABSTRACT FROM AUTHOR]

Over the last two decades, several data sets have been developed to assess flood risk at the global scale. In recent years, some of these data sets have become detailed enough to be informative at national scales. The use of these data sets nationally could have enormous benefits in areas lacking existing flood risk information and allow better flood management decisions and disaster response. In this study, we evaluate the usefulness of global data for assessing flood risk in five countries: Colombia, England, Ethiopia, India, and Malaysia. National flood risk assessments are carried out for each of the five countries using six data sets of global flood hazard, seven data sets of global population, and three different methods for calculating vulnerability. We also conduct interviews with key water experts in each country to explore what capacity there is to use these global data sets nationally. We find that the data sets differ substantially at the national level, and this is reflected in the national flood risk estimates. While some global data sets could be of significant value for national flood risk management, others are either not detailed enough, or too outdated to be relevant at this scale. For the relevant global data sets to be used most effectively for national flood risk management, a country needs a functioning, institutional framework with capability to support their use and implementation. Plain Language Summary: To adequately manage flood risk, it is important to understand where flood risk is greatest. This is done by carrying out a flood risk assessment, which combines flood hazard maps with data for exposure (who or what is flooded) and vulnerability (how affected exposure is by flooding). At the national level, flood risk assessments have typically been limited to countries with the necessary data and expertise to develop such assessments. In recent years, several flood risk data sets have been developed with global coverage, which means national flood risk can now be assessed in any country. We investigate how useful global data sets are for assessing national flood risk in five countries: Colombia, England, Ethiopia, India, and Malaysia. We find that there is significant disagreement between national flood risk estimates, suggesting not all global data sets are up to the task. Beyond that, we show that the usefulness of global flood risk data for national flood risk management is also determined by the national context in which they would be used. Key Points: Sixteen different global data sets are used to calculate national flood risk in Colombia, England, Ethiopia, India, and MalaysiaFlood risk estimates differ substantially at the national level and some data sets are not appropriate for use at the national scaleThe capability of regional and local governance in interpreting and using global data is addressed [ABSTRACT FROM AUTHOR]

Gregory's pioneering work on progressive river channel change, driven in England by both natural and anthropogenic forces, helped to guide major concepts and roles for fluvial geomorphology. It opened the door to a steep rise of applied fluvial geomorphology and a bigger role in public policy and river basin management. The channel change paradigm spans the millennia; by the late 20th century, the extent of Anthropocene harm to rivers justified both a radical label as 'damage' and a professional focus to prescribe remedies. Imitating engineering, then dominant in river management, Gregory favoured the term 'design'. The damage principally impacted river habitat and increasing collaboration with freshwater ecologists in the restitution of damage became part of the international move to 'river science'. European legislation strengthened the legal status of physical habitat in overall river quality. In the 21st century fluvial geomorphology has both strengthened and diversified further within 'river science', but also gaining social, behavioural, even political, insights through 'citizen science' and the 'co‐design' of river corridor projects with communities. The professional challenges of the climate and biodiversity emergencies return us to Gregory's question, 'how applied should we become?' The increasingly public profiles of, for example, flood risk policy require river scientists to participate in recommending and co‐designing options such as rehabilitation, restoration and rewilding. The separate and joint contributions of these options are discussed through the geomorphological prism. Progressive and episodic channel changes will increase as the drivers and remedies interact; we must play a role in scenario setting and adaptive management, promoting workable collaboration between natural and social sciences, especially in the contested field of design. [ABSTRACT FROM AUTHOR]

The estimation of return periods for floods likely to have significant societal impact is challenging unless suitably long records exist. Relatively few sites across the UK provide a continuous record of river level or discharge over 50 years, whilst records extending back to the nineteenth century are rare. This represents a significant problem in providing robust and reliable estimates of flood risk, as relatively short records often fail to include an adequate sample of large floods. The inclusion of historical flood levels/magnitudes prior to instrumental river flow recording presents a valuable opportunity to extend this dataset. This paper examines the value of using historical data (both documentary and epigraphic) to augment existing gauged records for the River Trent in Central England, as part of a multi-method approach to assessing flood risk. Single station and pooled methods are compared with flood risk estimates based on an augmented historical series (1795-2008) using the generalised logistic and generalised Pareto distributions. The value of using an even longer, but less reliable, extended historical series (1320-2008) is also examined. It is recommended that modelling flood risk for return periods >100 years should incorporate historical data, where available, and that a multi-method approach increases confidence in flood risk estimates. [ABSTRACT FROM AUTHOR]

Abstract: London is expected to experience more frequent periods of intense rainfall and tidal surges, leading to an increase in the risk of flooding. Damp and flooded dwellings can support microbial growth, including mould, bacteria, and protozoa, as well as persistence of flood-borne microorganisms. The amount of time flooded dwellings remain damp will depend on the duration and height of the flood, the contents of the flood water, the drying conditions, and the building construction, leading to particular properties and property types being prone to lingering damp and human pathogen growth or persistence. The impact of flooding on buildings can be simulated using Heat Air and Moisture (HAM) models of varying complexity in order to understand how water can be absorbed and dry out of the building structure. This paper describes the simulation of the drying of building archetypes representative of the English building stock using the EnergyPlus based tool ‘UCL-HAMT’ in order to determine the drying rates of different abandoned structures flooded to different heights and during different seasons. The results are mapped out using GIS in order to estimate the spatial risk across London in terms of comparative flood vulnerability, as well as for specific flood events. Areas of South and East London were found to be particularly vulnerable to long-term microbial exposure following major flood events. [Copyright &y& Elsevier]

This paper discusses computer simulation modelling in the context of environmental risk management. Approaching computer simulation as practice, performed in networks of heterogeneous elements, we examine the modelling undertaken by engineering consultants commissioned to provide knowledge about local flood risk to the Environment Agency of England and Wales (EA), the public body responsible for flood risk management. We propose that this simulation modelling is best understood as a form of engineering, work geared to solving the problems of clients. It is also a 'virtual' activity, articulating risks and possibilities in the digital space of the computer. We find that this 'virtual engineering' is shaped by the demands and protocols of the EA, first, by the establishment of long-term contractual agreements for delivering knowledge and second, by an EA requirement to use particular software packages. Fashioned between long-term contracts and black-boxed software virtual engineering becomes stabilised as 'the' way in which knowledge about flood risk in actual localities is generated and, consequently, becomes 'hard-wired' into flood risk management in England. [ABSTRACT FROM AUTHOR]

• Willowed log jams (∼dams) have been installed frequently to reduce flood risk. • Few studies have assessed pre- and post- installation changes to watercourse flows. • Discharge data shows an average 27.3% reduction on peaks, following installation. • River-reach (0–130 m) wildlife camera photos and levels confirm attenuation. • Willowed log jams re-naturalise flows, locally alleviating floods and droughts. Nature Based Solutions (NBS), including Natural Flood Management (NFM) schemes are becoming an important component of many governmental and organisation responses to increases in flood and aridity risk. NFM structures may take multiple forms to slow, store, disconnect and filter distributed overland flow pathways within a catchment that coalesce to generate a flood-wave downstream and runoff rather than infiltrate groundwaters. To date few studies have conducted observations pre- and post-installation monitoring at river reach-scales, despite widespread and frequent installation, to investigate the efficacy of willowed engineered log jams (WELJs) interventions used in abating flood-flows, through backing-up flood-pulses with consequent reductions in downstream discharges. This paper examines the efficiency, before and after installation of five 1 m high WELJs incorporating 1,000 Bay willow (Salix pentandra) saplings supporting the dead horizontal timber, across a total of 130 linear metres spanning the floodplain of a decommissioned reservoir. One rain gauge, two fixed point time-lapse wildlife cameras and three water level stations were installed: upstream-of, within, and downstream-of all WELJs. The findings demonstrate a substantial reduction is achieved for most events, with an average of 27.3% reduction in peak discharge being achieved post-installation. The time to peak is little impacted, however there is demonstrable evidence of a longer and higher recessional limb to the events. These findings quantify for the first time the role that WELJs can play in a move towards re-naturalisation of water level regimes, with lower peak water flows achieved, and waters released from the river-reach more slowly. Furthermore, baseflow during dry periods is also elevated by 27.1%, offering greater resilience to dry periods and droughts. Consequently, over the river-reach scale (0–130 m), WELJs play an important role in alleviating flood and drought risk through suppressing flood peaks and increasing baseflow during low flows; steps towards improved hydro-morphological quality overall. [ABSTRACT FROM AUTHOR]

The fens of eastern England rely on flood defences for their existence, and planning for flood risk has always had a high priority. A new focus was given with the issue of Planning Policy Guidance 25, and this paper presents experience from a Strategic Flood Risk Assessment of South Holland District, in Lincolnshire. The assessment pioneered the examination of fenland flood risk in terms of risk zones related to flood hazard and standard of protection. Methods for evaluating the risk zones are described; they consider flooding from embanked rivers which are subject to tide locking, internal drainage systems, tide level and wave action. The methods would be appropriate for many lowland areas of the UK where conventional flood analysis cannot be used. [ABSTRACT FROM AUTHOR]

The chronology provides a record of flash flood events in Britain based on data collated mainly between 1700 and 2020. The primary purpose of the chronology is to improve the risk assessment of flash floods of given magnitude. It is divided into 18 regions of the country and contains descriptions of nearly 8000 events. It extends a previous chronology covering northern and southwest England which is provided as an online resource in (http://ceg-fepsys.ncl.ac.uk/outputs/). Flash floods have had a variety of previous definitions but are here defined in terms of the speed of onset which can apply to both river floods and surface water floods. The chronology for the first time provides a comprehensive list of surface water floods and their recorded impact on cities, towns and villages. It also draws attention to the prevalence of very rapid rates of rise in river level either as 'walls of water', or at a rate likely to endanger life as a result of intense rainfall. Nearly 300 such events have been identified mainly in upland areas of northern England, Wales and Scotland. Practical and theoretical issues with respect to flood risk assessment and warning are discussed. The chronology is available to download and is hosted on https://www.jbatrust.org/how-we-help/publications-resources/rivers-and-coasts/uk-chronology-of-flash-floods-1/ [ABSTRACT FROM AUTHOR]

There has been a move towards a more integrated approach to flood risk management, which includes a stronger focus on property level measures. However, in England the uptake of these measures remains low. Flood experience has been found to influence preparedness (i.e., the uptake of measures), but even experience does not always result in an increase in preparedness. We investigate the variations in the relationship between experience and preparedness for the regions of England as defined by the Environment Agency. Analysis of survey data collected by the Environment Agency among the at risk population between 1997 and 2004 was undertaken to determine the differences between the seven regions. We find that in the South West, Southern and Anglian regions increases in preparedness with increasing experience are higher compared to other regions. In the Thames, Midlands and North West regions the preparedness increases less with increasing experience. We explore the influence of other factors influencing flood mitigation behaviour that have been previously found in the literature and find that the differences between regions are correlated with the severity of experienced flooding and whether English is the first language of the respondents. [ABSTRACT FROM AUTHOR]

Concern is growing that climate change may amplify global flood risk but short hydrological data series hamper hazard assessment. Lake sediment reconstructions are capturing a fuller picture of rare, high-magnitude events but the UK has produced few lake palaeoflood records. We report the longest lake-derived flood reconstruction for the UK to date, a 1500-year record from Brotherswater, northwest England. Its catchment is well-suited physiographically to palaeoflood research, but its homogeneous, dark brown sediment matrix precludes visual identification of flood layers. Instead, an outlier detection routine applied to high-resolution particle size measurements showed a >90% match, in stratigraphic sequence, to measured high river flows. Our late-Holocene palaeoflood reconstruction reveals nine multi-decadal periods of more frequent flooding (510–630 CE, 890–960, 990–1080, 1470–1560, 1590–1620, 1650–1710, 1740–1770, 1830–1890 and 1920–2012), and these show a significant association with negative winter North Atlantic Oscillation (wNAO) phasing and some synchrony with solar minima. These flood-rich episodes also overlap with local and regional land-use intensification, which we propose has amplified the flood signal by creating a more efficient catchment sediment conveyor and more rapid hillslope-channel hydrological connectivity. Disentangling anthropogenic and climatic drivers is a challenge but anthropogenic landscape transformation should evidently not be underestimated in palaeoflood reconstructions. Our paper also demonstrates that flood histories can be extracted from the numerous lakes worldwide containing organic-rich, visually homogeneous sediments. This transformative evidence base should lead to more reliable assessments of flood frequency and risks to ecosystems and infrastructure. • We report a 1500-year record of flood frequency from northwest England. • Frequent flooding has occurred in multi-decadal episodes. • Palaeoflood deposits were successfully identified within a visually homogeneous sediment matrix. • Negative NAO appears to drive frequent winter flooding in northwest England. • Anthropogenic landscape modification has amplified the sedimentary flood hazard. [ABSTRACT FROM AUTHOR]

Contemporary water management practices worldwide are informed by two leading paradigms: integrated water resources management and adaptive management. While previous scholarship has already studied the two paradigms, as well as their central principles, in isolation, there are few attempts only to theorise their interaction and to explore empirically their parallel implementation and coexistence. This article contributes to this emerging literature. Its ambition is to review and complement current frameworks conceptualising the impact of integrated water resources management on adaptive capacity. To this end, the article analyses the involvement of non-state actors in UK water and flood risk management, specifically in England and Wales. This is an exciting case to study: for many decades, environmental management in England and Wales had a reputation for being a technocratic exercise. In the past 15 years, however, environmental authorities undertook major efforts to lay the foundations for enhanced collaboration and stakeholder participation, amongst others encouraged by two European Union initiatives reflecting integrated and adaptive management principles: the Water Framework Directive and the Floods Directive. The empirical evidence suggests a spurious link only between the two paradigms. This contradicts conventional wisdom which, so I argue, tends to oversimplify a complex relationship. I introduce three theory-informed arguments-relating to conceptual diversity, path dependency, and the nature of the dependent variable-to address these shortcomings and to contribute to theory building. [ABSTRACT FROM AUTHOR]

Flooding is a major threat to the local communities in the UK, and the risks are increasing due to climate change. Encouraging homeowners to prepare for the consequences of catastrophic flooding is imperative. This study aims to examine the ways in which individuals' risk perceptions and socio-cultural characteristics co-determine the preparedness for flood hazards. It is based on a social survey about household arrangements that can reduce the economic losses arising from flooding and enhance community resilience. A total of 485 responses were solicited from homeowners in England and Wales. Results confirm that the intention to act is socially motivated. This indicates the need for addressing the role of social networks and engagement with local community in enhancing community resilience to flooding. On the other hand, the effect of risk-related considerations is complicated. Perceived severity of flood damage is associated with intended actions, whereas risk characteristics are not. This implies that although providing relevant risk information to the public is crucial, appealing to the feelings of fears and uncertainties is less likely to be effective in driving actions for managing flood risks than has been usually assumed. The findings have practical implications for policy-making and climate risk communication. [ABSTRACT FROM AUTHOR]

English floodplains are platforms for flood risk vulnerability; they are varied in form and in the timing of their development, both naturally and in terms of human occupation. An understanding of floodplain generation is one of the diverse research areas that can contribute towards effective flood mitigation efforts. The performance of remedial measures like catchment sediment management, flood embanking and channel dredging need to be evaluated with regard to active fluvial process systems so that they may be applied appropriately, particularly given uncertain future environmental changes. [ABSTRACT FROM AUTHOR]