scholarly journals Review article: A review and critical analysis of the efforts towards urban flood risk management in the Lagos region of Nigeria

2016 ◽  
Vol 16 (2) ◽  
pp. 349-369 ◽  
Author(s):  
U. C. Nkwunonwo ◽  
M. Whitworth ◽  
B. Baily
Keyword(s):  
Risk Management ◽  
Flood Risk ◽  
Risk Mitigation ◽  
Flood Hazard ◽  
Flood Management ◽  
Flood Damage ◽  
Flood Risk Management ◽  
Management Policy ◽  
Urban Flooding ◽  
Urban Flood

Abstract. Urban flooding has been and will continue to be a significant problem for many cities across the developed and developing world. Crucial to the amelioration of the effects of these floods is the need to formulate a sound flood management policy, which is driven by knowledge of the frequency and magnitude of impacts of these floods. Within the area of flood research, attempts are being made to gain a better understanding of the causes, impacts, and pattern of urban flooding. According to the United Nations office for disaster reduction (UNISDR), flood risk is conceptualized on the basis of three integral components which are frequently adopted during flood damage estimation. These components are: probability of flood hazard, the level of exposure, and vulnerabilities of elements at risk. Reducing the severity of each of these components is the objective of flood risk management under the UNISDR guideline and idea of “living with floods”. On the basis of this framework, the present research reviews flood risk within the Lagos area of Nigeria over the period 1968–2012. During this period, floods have caused harm to millions of people physically, emotionally, and economically. Arguably over this period the efforts of stakeholders to address the challenges appear to have been limited by, amongst other things, a lack of reliable data, a lack of awareness amongst the population affected, and a lack of knowledge of flood risk mitigation. It is the aim of this research to assess the current understanding of flood risk and management in Lagos and to offer recommendations towards future guidance.

scholarly journals SWOT PRINCIPLE IN FLOOD RISK MANAGEMENT

2021 ◽  
Vol XXVIII (2) ◽  
pp. 125-137
Author(s):  
Vasile Grama ◽  
◽  
Agostino Avanzi ◽  
Livia Nistor-Lopatenco ◽  
◽  
...  
Keyword(s):  
Risk Management ◽  
Flood Risk ◽  
Development Trend ◽  
Flood Management ◽  
Legal Framework ◽  
Flood Damage ◽  
Flood Risk Management ◽  
Management Policy ◽  
Global Statistics ◽  
Analysis Models

An analysis of global statistics shows a substantial increase in flood damage over the past few decades. With the recent transition to a more risk-based approach in European flood management policy, flood analysis models have become an important part of flood risk management. In many cases, flood damages are extensive to the environment, to the economy and also socially. According to the priority development trend "Infrastructure and Environment", Ungheni district of Republic of Moldova (RM) aims for an efficient infrastructure, based on environmental protection, whose development, operation and maintenance will be done using of a database, protocols, existing guides and accessible to the level of each local public administration. In the last decade, projects have been implemented in Moldova to study the phenomenon of floods in order to develop structural and non-structural measures to protect localities. This article aims is to systematize the existing knowledge and characteristics of the methods available to give operational recommendations and principles that can support authorities, local entities, and the stakeholders involved in decision-making with regard to flood risk management in their compliance with the Floods Directive (2007/60/EC), national and local legal framework.

We are all tributaries: combining art and science to transform human relationship with rivers.

2021 ◽  
Author(s):  
Nicole Archer
Keyword(s):  
Risk Management ◽  
Flood Risk ◽  
Flood Management ◽  
Flood Risk Management ◽  
Management Policy ◽  
Art Practice ◽  
Policy Makers ◽  
Scientific Methods ◽  
Creative Practice ◽  
Transformative Process

<div> <p>What is your relationship with river? This was the central question posed by a series of creative practice workshops with scientists and local authorities who worked with complex flood risk management issues. Many of the flood mitigating solutions offered to managers are based on scientific methods to control and reduce river flooding. Scientific methods not only provide a sense of control towards river dynamics, but also develop a sense of security for people to feel safe from water. Because of climate change, flood events are increasing globally and some countries, like Scotland, are seeking to expand the possibilities of coping with extreme weather through broader, more holistic ways to mitigate flooding.</p> </div><div> <p>The aim of this study was to bridge rational knowledge often associated with scientific methods and the tacit knowledge that might emerge through participative art. The creative potential of art and participation in art practice was employed in collaboration with scientists and policy makers to inform future solutions towards flood mitigation.</p> </div><div> <p>The research used the theoretical premises described in what Irwin (2013) describes as a/r/tography: “drawing upon the professional practices of educators, artists, and researchers, it entangles and performs what Deleuze and Guattari (1987) refer to as a rhizome, an assemblage of objects, ideas, and structures that move in dynamic motion performing waves of intensities that create new understandings.” (p.199). Unlike the outcome and target driven aims of scientific methodology, these “waves of intensities” are crucial to understanding the form of intersubjective work which is crucial for art and creativity in art practice, because this is where affective transformation of meaning and understanding happens, through sensing, feeling and perceiving.</p> </div><div> <p>In the case of these creative practice workshops, the transformation that was explored was a shift from anthropocentric thinking about water to non-anthropocentric thought, achieved through sensing, feeling and perceiving. The creative practice workshops at the Scotland flood management conference 2020 were part of a larger process, where the intent was to initiate a transformative process that would work towards developing different ways of thinking in terms of Flood Risk Management. The process began with an artistic engagement with the river and the development of underwater film of rivers. This was followed by two participatory workshops. The next step consisted of an artistic response to the creative process undertaken by the participants. The last step was an engagement with water management policy makers. This will be further discussed in terms of a transformative process between artist and scientist.</p> </div>

scholarly journals Flood fatality hazard and flood damage hazard: combining multiple hazard characteristics into meaningful maps for spatial planning

2015 ◽  
Vol 15 (6) ◽  
pp. 1297-1309 ◽  
Author(s):  
K. M. de Bruijn ◽  
F. Klijn ◽  
B. van de Pas ◽  
C. T. J. Slager
Keyword(s):  
Risk Management ◽  
Flood Risk ◽  
Spatial Planning ◽  
Flood Hazard ◽  
Flood Damage ◽  
Flood Risk Management ◽  
Mitigation Measures ◽  
Accurate Information ◽  
Hazard Maps ◽  
The Past

Abstract. For comprehensive flood risk management, accurate information on flood hazards is crucial. While in the past an estimate of potential flood consequences in large areas was often sufficient to make decisions on flood protection, there is currently an increasing demand to have detailed hazard maps available to be able to consider other risk-reducing measures as well. Hazard maps are a prerequisite for spatial planning, but can also support emergency management, the design of flood mitigation measures, and the setting of insurance policies. The increase in flood risks due to population growth and economic development in hazardous areas in the past shows that sensible spatial planning is crucial to prevent risks increasing further. Assigning the least hazardous locations for development or adapting developments to the actual hazard requires comprehensive flood hazard maps. Since flood hazard is a multi-dimensional phenomenon, many different maps could be relevant. Having large numbers of maps to take into account does not, however, make planning easier. To support flood risk management planning we therefore introduce a new approach in which all relevant flood hazard parameters can be combined into two comprehensive maps of flood damage hazard and flood fatality hazard.

scholarly journals Assessing urban strategies for reducing the impacts of extreme weather on infrastructure networks

2016 ◽  
Vol 3 (5) ◽  
pp. 160023 ◽  
Author(s):  
Maria Pregnolato ◽  
Alistair Ford ◽  
Craig Robson ◽  
Vassilis Glenis ◽  
Stuart Barr ◽  
...  
Keyword(s):  
Risk Management ◽  
Flood Risk ◽  
Flood Management ◽  
Flood Risk Management ◽  
Transport Network ◽  
Transport Infrastructure ◽  
Urban Flood ◽  
Infrastructure Networks ◽  
Form Part ◽  
Critical Locations

Critical infrastructure networks, including transport, are crucial to the social and economic function of urban areas but are at increasing risk from natural hazards. Minimizing disruption to these networks should form part of a strategy to increase urban resilience. A framework for assessing the disruption from flood events to transport systems is presented that couples a high-resolution urban flood model with transport modelling and network analytics to assess the impacts of extreme rainfall events, and to quantify the resilience value of different adaptation options. A case study in Newcastle upon Tyne in the UK shows that both green roof infrastructure and traditional engineering interventions such as culverts or flood walls can reduce transport disruption from flooding. The magnitude of these benefits depends on the flood event and adaptation strategy, but for the scenarios considered here 3–22% improvements in city-wide travel times are achieved. The network metric of betweenness centrality, weighted by travel time, is shown to provide a rapid approach to identify and prioritize the most critical locations for flood risk management intervention. Protecting just the top ranked critical location from flooding provides an 11% reduction in person delays. A city-wide deployment of green roofs achieves a 26% reduction, and although key routes still flood, the benefits of this strategy are more evenly distributed across the transport network as flood depths are reduced across the model domain. Both options should form part of an urban flood risk management strategy, but this method can be used to optimize investment and target limited resources at critical locations, enabling green infrastructure strategies to be gradually implemented over the longer term to provide city-wide benefits. This framework provides a means of prioritizing limited financial resources to improve resilience. This is particularly important as flood management investments must typically exceed a far higher benefit–cost threshold than transport infrastructure investments. By capturing the value to the transport network from flood management interventions, it is possible to create new business models that provide benefits to, and enhance the resilience of, both transport and flood risk management infrastructures. Further work will develop the framework to consider other hazards and infrastructure networks.

scholarly journals Municipality’s financial potencial and policy of flood risk management in Poland

2018 ◽  
Vol 44 ◽  
pp. 00037 ◽  
Author(s):  
Grzegorz Dumieński ◽  
Marcin Krzyżanowski ◽  
Andrzej Tiukało
Keyword(s):  
Risk Management ◽  
Flood Risk ◽  
Flood Hazard ◽  
Financial Burden ◽  
Flood Risk Management ◽  
Protection System ◽  
Flood Protection ◽  
Management Policy ◽  
Financial Condition ◽  
Flood Protection System

For Polish municipalities – basic units of local government (LGU), flood constitutes a significant source of material losses resulting both from flood damages and from the costs of restoring the regular functioning of the municipalities after the disaster is gone. Authors stated a thesis that the municipality, despite its constitutional obligations connected with providing the safety for its citizens, is not capable to bear the financial burden shaping the flood protection system in the basin. It is, however, due to support the flood protection system by strengthening its adaptive potential and adaptive capacity for efficient limitation of adverse consequences of flood. To justify this thesis, the financial condition of the municipalities threatened with flood was compared to the size of potential flood losses for floods of the medium probability of occurrence (p = 1%). Authors have shown that the municipality’s structure, more than its budget size decides about its financial potential. Especially the municipality’s own revenue is an evidence for the determined financial potential, at the same time, it can be a source of the undertaken actions in order to increase the level of the municipality’s adaptability in the context of flood hazard. Conducted analyses allow to shape the flood risk management policy, both at the municipal level and on a national scale.

scholarly journals River science and flood risk management policy in England

2021 ◽  
pp. 030913332110363
Author(s):  
Malcolm Newson ◽  
John Lewin ◽  
Paul Raven
Keyword(s):  
Climate Change ◽  
Risk Management ◽  
Adaptive Management ◽  
Flood Risk ◽  
Natural Capital ◽  
Flood Management ◽  
Flood Risk Management ◽  
Management Policy ◽  
Catchment Scale ◽  
Risk Management Policy

We review the role of science in shaping river flood risk management policy in England, highlighting the relatively recent influence of fluvial geomorphology, river ecology, climate change and ecosystem services in evidence-based decision-making. These disciplines, together with an historical perspective, catchment-scale delivery, integrated land and water management planning, and adaptive management are crucial in managing future flood risk. A central tenet of previous land drainage policy was a professional (and public) mindset about flood ‘prevention’ solutions for river flooding. As a direct consequence, more than 8,500 km of rivers were ‘improved’ by mechanical dredging during the 1930s to 1980s; habitats were destroyed, but flooding continued. A more enlightened, long-term approach has since evolved in response to environmental imperatives and lessons learnt from several major floods during the last two ‘flood-rich’ decades. River science, local knowledge and land management incentives allow more natural processes to be restored in river catchments. The natural capital and ecosystem service benefits of river systems are now better understood and quantified, whereas the importance of sediment transport is fully recognised, with sources and sinks treated more holistically than in the past. Evaluating the outcomes of innovative runoff and river management techniques from both physical and socioeconomic perspectives will determine the success of a catchment-based approach. We highlight some of the uncertainties, nuances and assumptions associated with recent initiatives such as Natural Flood Management, Citizen Science and Flood Action Groups. Further integration between policy, strategic planning and local delivery is needed to anticipate and respond to climate and catchment land use changes. River science will play a crucial part in identifying the most effective way of improving flood management and in a way that helps to deliver the recovery of nature. It will inform adaptive management to cope with climate change.

scholarly journals Flood fatality hazard and flood damage hazard: combining multiple hazard characteristics into meaningful maps for spatial planning

2015 ◽  
Vol 3 (1) ◽  
pp. 123-159
Author(s):  
K. M. de Bruijn ◽  
F. Klijn ◽  
B. van de Pas ◽  
C. T. J. Slager
Keyword(s):  
Risk Management ◽  
Flood Risk ◽  
Spatial Planning ◽  
Flood Hazard ◽  
Flood Damage ◽  
Flood Risk Management ◽  
Mitigation Measures ◽  
Accurate Information ◽  
Hazard Maps ◽  
The Past

Abstract. For comprehensive flood risk management, accurate information on flood hazards is crucial. While in the past an estimate of potential flood consequences in large areas was often sufficient to make decisions on flood protection, there currently is an increasing demand to have detailed hazard maps available to be able to consider other risk reducing measures as well. Hazard maps are a prerequisite for spatial planning, but can also support emergency management, the design of flood mitigation measures, and the setting of insurance policies. The increase in flood risks due to population growth and economic development in hazardous areas in the past shows that sensible spatial planning is crucial to prevent risks increasing further. Assigning the least hazardous locations for development or adapting developments to the actual hazard requires comprehensive flood hazard maps. Since flood hazard is a multi-dimensional phenomenon, many different maps could be relevant. Having large numbers of maps to take into account does, however, not make planning easier. To support flood risk management planning we therefore introduce a new approach in which all relevant flood hazard parameters can be combined into two comprehensive maps of flood damage hazard respectively flood fatality hazard.

Application of scenario technique in flood risk management

2007 ◽  
Vol 56 (4) ◽  
pp. 87-95 ◽  
Author(s):  
A. Winterscheid
Keyword(s):  
Risk Management ◽  
Flood Risk ◽  
Flood Control ◽  
Flood Damage ◽  
Flood Risk Management ◽  
Policy Framework ◽  
Limited Perspective ◽  
Integrated Flood Risk Management ◽  
Scenario Technique ◽  
Management Cycle

It is now commonly accepted that the management of flood risks has to be fulfilled within an integrated framework. About two decades ago flood risk was managed from a limited perspective predominantly by means of structural measures aimed at flood control. In contrast integrated flood risk management incorporates the complete management cycle consisting of the phases prevention, protection and preparedness. In theory it is a well described concept. In the stage of implementation, however, there is often a lack of support although a consistent policy framework exists. Consequently, the degree of implementation must be rated as inadequate in many cases. In particular this refers to the elements which focus on preparedness and prevention. The study to which this paper refers emphasises the means and potentials of scenario technique to foster the implementation of potentially appropriate measures and new societal arrangements when applied in the framework of integrated flood risk management. A literature review is carried out to reveal the state-of-the-art and the specific problem framework within which scenario technique is generally being applied. Subsequently, it is demonstrated that scenario technique is transferable to a policy making process in flood risk management that is integrated, sustainable and interactive. The study concludes with a recommendation for three applications in which the implementation of measures of flood damage prevention and preparedness is supported by scenario technique.

scholarly journals The added value of system robustness analysis for flood risk management illustrated by a case on the IJssel River

2015 ◽  
Vol 15 (2) ◽  
pp. 213-223 ◽  
Author(s):  
M. J. P. Mens ◽  
F. Klijn
Keyword(s):  
Risk Management ◽  
Flood Risk ◽  
Robustness Analysis ◽  
Decision Criterion ◽  
Flood Damage ◽  
Flood Risk Management ◽  
Added Value ◽  
Common Basis ◽  
System Robustness ◽  
System Configurations

Abstract. Decision makers in fluvial flood risk management increasingly acknowledge that they have to prepare for extreme events. Flood risk is the most common basis on which to compare flood risk-reducing strategies. To take uncertainties into account the criteria of robustness and flexibility are advocated as well. This paper discusses the added value of robustness as an additional decision criterion compared to single-value flood risk only. We do so by quantifying flood risk and system robustness for alternative system configurations of the IJssel River valley in the Netherlands. We found that robustness analysis has added value in three respects: (1) it does not require assumptions on current and future flood probabilities, since flood consequences are shown as a function of discharge; (2) it shows the sensitivity of the system to varying discharges; and (3) it supports a discussion on the acceptability of flood damage. We conclude that robustness analysis is a valuable addition to flood risk analysis in support of long-term decision-making on flood risk management.

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