Local Flood Risk Management Strategy 2014-2020 (original) (raw)
Related papers
Urban Flood Risk Management: Impact of Combined Strategies
2021
The sprawling of urban areas combined with the intensification of extreme storm events increases the frequency of floods. The Milan metropolitan area, Italy, is a glaring example of this condition, where floods occur on average two times a year and a new approach for urban water management is required. In recent years sustainable urban drainage systems (SuDs) have been spreading in many cities for local stormwater runoff reduction, in order to reduce the risk of overloading receiving water bodies and sewerage systems. These natural-based techniques also present advantages in terms of water quality improvement and in some cases also provide benefits at the ecological level. For an optimal river basin management, it is necessary to adopt holistic approaches including river restoration measures and SuDs for the hydraulic risk mitigation and the water and environmental quality enhancement. Previous research analysed the impact of re-naturalization measures on a stretch of the Seveso riv...
Five feet high and rising : cities and flooding in the 21st century
2011
Urban flooding is an increasingly important issue. Disaster statistics appear to show flood events are becoming more frequent, with medium-scale events increasing fastest. The impact of flooding is driven by a combination of natural and human-induced factors. As recent flood events in Pakistan, Brazil, Sri Lanka and Australia show, floods can occur in widespread locations and can sometimes overwhelm even the best prepared countries and cities. There are known and tested measures for urban flood risk management, typically classified as structural or engineered measures, and non-structural, management techniques. A combination of measures to form an integrated management approach is most likely to be successful in reducing flood risk. In the short term and for developing countries in particular, the factors affecting exposure and vulnerability are increasing at
Local Flood Risk Management Strategy
2014
Contents The Directive requires a strategic assessment to be carried out for all plans and programmes which are "subject to preparation and/or adoption by an authority at national level, regional or local level." The West Sussex Local Flood Risk Management Strategy therefore qualifies and requires this assessment. The SEA seeks to identify and evaluate the likely environmental impacts that a plan or policy may have but in the early stages of development and prior to the adoption and implementation of the plan or programme, allowing time for alternative measures to be identifies and assessed. The SEA Regulations identify environmental receptors that must be initially considered for all SEAs. These include: • Population and human health • Biodiversity, flora and fauna;
Urban flood mitigation: sustainable options
The Sustainable City VI, 2010
Cities have started to anticipate the effects of global warming dealing with flood management. Indeed, it seems that this last decade, flood risk has increased and cities are facing on the one hand more frequent hazards, and on the other hand different types of flooding: fluvial, coastal, estuarial and pluvial. Most cities have to manage at least two of these flooding types. At the same time, flood risk management practices have changed step-by-step. Indeed, despite efforts made to maintain the flood defense assets well, we often observe failures leading to finally increase flood risk in protected areas during major flood events. Moreover, flood forecasting models, although they benefit from continuous improvements, remain partly inaccurate due to uncertainties populated all along data calculation processes. This means cities cannot continue to manage flood risk only by the use of flood defenses: sustainable options have to be designed to better mitigate the effects of flooding in urban area and in a long term strategy. Several European cities have suffered recent flooding events. It was the case for example in 2007 in United Kingdom. During this period, major events came from extreme rainfall and it appears that pluvial flood risk has become one of the most frequent events. In this context, flood risk can appear on every territory: cities have to develop some methods to take into account this new deal, options to achieve urban flood resilience. Some solutions that cities are using or will be able to set up in the near future will be described.
Re-Thinking Urban Flood Management—Time for a Regime Shift
Urban flooding is of growing concern due to increasing densification of urban areas, changes in land use, and climate change. The traditional engineering approach to flooding is designing single-purpose drainage systems, dams, and levees. These methods, however, are known to increase the long-term flood risk and harm the riverine ecosystems in urban as well as rural areas. In the present paper, we depart from resilience theory and suggest a concept to improve urban flood resilience. We identify areas where contemporary challenges call for improved collaborative urban flood management. The concept emphasizes resiliency and achieved synergy between increased capacity to handle stormwater runoff and improved experiential and functional quality of the urban environments. We identify research needs as well as experiments for improved sustainable and resilient stormwater management namely, flexibility of stormwater systems, energy use reduction, efficient land use, priority of transport and socioeconomic nexus, climate change impact, securing critical infrastructure, and resolving questions regarding responsibilities.
Managing flooding: from a problem to an opportunity
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
The paper argues that the concept and practice of sustainability have proved too difficult to achieve within traditional water management, and there is a lack of political will to move towards truly sustainable water services. Instead, compromised concepts, including resistance, resilience, ecosystem services, natural capital and adaptation are defining approaches; each of which may contribute partially to sustainability. Pressures due to the changing climate, ecological degradation, human demands, urbanization and deteriorating assets are challenging sustainability and compelling changes to water management. Water is now seen less as a problem to be managed than as an opportunity, as wherever situated, water brings many opportunities to contribute to anthropogenic needs. New ideas are helping to frame the way in which water management is being approached: (i) waste is no longer waste, but a potential resource within a circular economy; (ii) the interconnectedness of infrastructure ...
Research for Policy and Practice, 2012
Achieving urban flood resilience at local, regional and national levels requires a transformative change in planning, design and implementation of urban water systems. Flood risk, wastewater and stormwater management should be re-envisaged and transformed to: ensure satisfactory service delivery under flood, normal and drought conditions, and enhance and extend the useful lives of ageing grey assets by supplementing them with multi-functional Blue-Green infrastructure. The aim of the multidisciplinary Urban Flood Resilience (UFR) research project, which launched in 2016 and comprises academics from nine UK institutions, is to investigate how transformative change may be possible through a whole systems approach. UFR research outputs to date are summarised under three themes. Theme 1 investigates how Blue-Green and Grey (BG þ G) systems can be co-optimised to offer maximum flood risk reduction, continuous service delivery and multiple co-benefits. Theme 2 investigates the resource capacity of urban stormwater and evaluates the potential for interoperability. Theme 3 focuses on the interfaces between planners, developers, engineers and beneficiary communities and investigates citizens' interactions with BG þ G infrastructure. Focussing on retrofit and new build case studies, UFR research demonstrates how urban flood resilience may be achieved through changes in planning practice and policy to enable widespread uptake of BG þ G infrastructure.
Drivers of changing urban flood risk: A framework for action
2019
This study focuses on drivers for changing urban flood risk. We suggest a framework for guiding climate change adaptation action concerning flood risk and manageability in cities. The identified key drivers of changing flood hazard and vulnerability are used to provide an overview of each driver's impact on flood risk and manageability at the city level. We find that identified drivers for urban flood risk can be grouped in three different priority areas with different time horizon. The first group has high impact but is manageable at city level. Typical drivers in this group are related to the physical environment such as decreasing permeability and unresponsive engineering. The second group of drivers is represented by public awareness and individual willingness to participate and urbanization and urban sprawl. These drivers may be important and are manageable for the cities and they involve both short-term and long-term measures. The third group of drivers is related to policy and long-term changes. This group is represented by economic growth and increasing values at risk, climate change, and increasing complexity of society. They have all high impact but low manageability. Managing these drivers needs to be done in a longer time perspective, e.g., by developing long-term policies and exchange of ideas.