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Flood Management Tool Series, Technical Document, 21. Effectiveness of flood management measures
It is not enough to assert—to an elected official, a regulator, a donor organization or the taxpayer—that one’s organization is doing an effective job of flood management. One also has to be able to provide a credible answer to the question: “How do you know?” 2 There is a multiplicity of flood management activities that can be pursued by a plethora of government jurisdictions, government agencies, NGOs, private and volunteer groups— independently, in cooperation, in competition. These activities may include: constructing flood prevention infrastructure; rebuilding houses, buildings and infras ...
Flood Management Tool Series, Technical Document, 20. Flood Mapping
Flood Maps are tools to visualize flood information for decision makers and the general public. These maps form the basis for developing flood risk scenarios based on land use, various environmental and climate conditions and including social and economic conditions. Flood maps in their various formats and scales are the basis for the planning and implementation of development alternatives. In addition to the general objective of a flood map, special uses require specific information including maps that depict exposure to floods of various recurrence periods, flood risks, vulnerability and res ...
Flood Management Tool Series, Technical Document, 19. Flood Forecasting and Early Warning
Flood forecasting and early warning is carried out to reduce risks in flood prone areas. This tool is tailored for use when decision‐makers need to establish an effective overview of the flood situation, provide timely and accurate early warnings and flood forecasting services to a variety of users. Many countries have already integrated flood forecasting and early warning measures into their local and national emergency planning systems. This tool provides a concise overview of concepts and approaches in flood forecasting and early warning that help flood managers and practitioners to develop ...
Flood Management Tool Series, Technical Document, 18. Transboundary Flood Management
As floods do not recognize borders, transboundary flood risk management is imperative in shared river basins, involving both Governments – as borders are involved – and their people – as risk is involved. However, transboundary flood management is not easy to implement, as joint monitoring, forecasting and early warning, coordinated risk assessment and joint planning of measures, and appropriate legal and institutional frameworks are all necessary. The tool on transboundary aspects of flood management focuses on common problems, objectives and approaches of flood management in transboundary ba ...
Flood Management Tool Series, Technical Document, 17. Coastal and Delta Flood Management
Coastal flood hazards are diverse (storm surges, tsunamis, tropical storms, seiches etc.) and are highly unpredictable. A profound understanding of these hazards, their mechanisms and potential impacts is therefore indispensable in order to derive an appropriate risk management response.
Such response should be selected from the widest range of measures and policies possible, taking due account of the inherent uncertainties both with respect to the probability of hazard and evolving socioeconomic developments.
This Tool paper aims at providing practical guidance to flood ...
Flood Management Tool Series, Technical Document, 08. Risk Sharing in Flood Management
Flood managers have traditionally focused on structural interventions that, in the majority of cases have succeeded only in shifting impacts downstream or upstream. Meanwhile, however, the analytical tools for flood risk assessment and risk management practices offer a far greater variety of options. The Tool introduces the topic based on a judicious combination of measures that address risk reduction, risk retention and risk transfer through a strategic mix of structural and non-structural measures for flood preparedness, response and recovery. Risk reduction options also include the question ...
Flood Management Tool Series, Technical Document, 03. Applying Environmental Assessment for Flood Management
This tool provides flood management practitioners a generic approach for integrating environmental considerations into the decision-making processes in basin flood management on project as well as strategic levels. As such, it provides generic approaches for conducting Strategic Environmental Assessments (SEA) at the basin flood management planning stage and Environmental Impact Assessments (EIA) at the project design and implementation stage.
Flood Management Tool Series, Technical Document, 02. Conducting Flood Loss Assessments
This tool sets out to provide for the operational level a lead-in on available concepts and methods to assess flood losses for three major purposes: the activation and facilitation of local and external help, the formulation of recovery plans, and long-term development planning and policy reform in the realm of flood management. The second edition of the Tool incorporates recent developments in flood loss assessment and techniques across the world, such as examples of practiced assessment case studies from Czech Republic, Japan, Madagascar and Nepal.
Flood Management Tool Series, Technical Document, 16. Management of Flash Floods
This tool provides an overview of approaches and practical actions to reduce disaster risks associated with flash floods. Flood forecasting and warning are expected to play an important role in flash flood management though there are scientific and technical limits to provide accurate and timely warnings. Spatial planning and flood proofing can also reduce risk of exposure. These require flood hazard mapping to assess the risk of flash floods and an appropriate legal framework to integrate (flash) flood management planning and spatial planning. Participatory approach can identify areas at risk ...
Flood Management Tool Series, Technical Document, 15. Flood Proofing
This tool aims to provide various options of flood proofing measures, not exclusively limited to structural measures or building protections, with a target of practitioners responsible for flood management. The tool covers two aspects of flood management: flood resistance and flood resilience. The flood resistance keeps out flood water to prevent flood damages, while flood resilience minimizes the impacts of floods once flooding occurs.
Flood Management Tool Series, Technical Document, 14. Urban Flood Management in a Changing Climate
The main thrust of this tool is to examine major aspects of urban flood management through in the context of climate change. This document deals with the “management” process and less about the technical, structural, and capital-intensive strategies usually pursued in coping with urban floods. It also explores the vital interaction and necessary overlap of urban flood management with land use management, urban planning, socio-economic development, and public awareness and participation. All of these issues lie at the core of planning for and carrying out strategies for climate change adaptatio ...
Flood Management Tool Series, Technical Document, 13. Conservation and Restoration of Rivers and Floodplains
The tool aims at assisting practitioners mainly through reviewing and describing options for conservation and restoration of rivers and floodplains that can potentially assist flood management practitioners in addressing various flood management objectives, and providing an overview of current practices that could help flood management practitioners in identifying and establishing the values of ecosystem services generated under different conservation, restoration and flood management scenarios.
Flood Management Tool Series, Technical Document, 12. Management of Sediment-Related Risks
Sediment-related disasters, which are caused by debris flows, slope failures and landslides, have different characteristics from water-related disasters. That is, disasters sites, timing of occurence, and hazard levels are difficult to predict accurately. This Tool explains practical approaches of identifying debris flows and landslides areas and introduces good practices of mitigation measures to minimize human loss. For example, disaster prevention maps containing hazard areas, sage refuges and evacuation routes are as essential and effective means as flood hazard maps.
Flood Management Tool Series, Technical Document, 11. Flood Emergency Planning
This tool provides basic information on preparation and implementation of flood emergency management, which breaks down into three stages: preparedness, response, and recovery. By reducing exposure to flooding at each stage, flood emergency management contributes to flood risk reduction, which is an important objective of Integrated Flood Management. To this end, flood hazard maps help users understand hazard information through the process of planning, preparing and responding to flood. Emergency exercises (e.g. role playing drill) also strengthen stakeholders’ capacity to smoothly conduct em ...
Flood Management Tool Series, Technical Document, 10. IFM as an Adaptation Tool for Climate Change: Case Studies
This Tool introduces strategies for climate change adaption and implementation of the strategies in the context of flood management. Nine case studies are extracted from the following countries and a regional organization, namely US, UK, France, Germany, Netherlands, Japan, China, South Korea, and EU. The adaptation strategies are described especially from the point of flood risk assessment. Based on the projected impacts of climate change, each country formulates their own adaption measures and designates responsible agencies for their implementation.
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