Understanding the causes of flood disasters, and ways to mitigate them, is an essential first step toward the integrated management of flood risk in cities. This can help decision makers guide investments out of hazardous zones, save lives and property, as well as ensure that investments take into account both expected and unprecedented disaster events. Careful disaster planning is critical in complex urban environments that are home to large populations as well as multiple infrastructure and service networks. Though risk assessments are of various types, depending on the needs and objectives of the stakeholders involved, all share the objective of enhancing the knowledge and management of risk. To this end, it is also important to consider how assessment results are communicated to stakeholders, as well as to the wider public. In Japan, risk assessments are generally used to inform flood risk management plans and investments, as well as to communicate flood risk information to enhance preparedness and evacuation plans. This Knowledge Note examines the different types of urban flood risk, and the roles of specific sectors and stakeholders in conducting flood risk assessments in Japan. It provides an overview of the various objectives and methodologies used. Examples include risk assessments conducted to inform the design of structural flood management measures and the planning of nonstructural flood evacuation, as well as to raise community awareness and integrate climate change considerations in risk management efforts. These examples showcase how and why various risk assessments are conducted, and how they are used to enhance decisions and actions. The note also considers the effectiveness of risk communication measures in Japan, and analyzes the prevalent methods and technologies used to strengthen flood risk mitigation, preparedness, and evacuation plans in Japanese cities.
Details
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Author
Kryspin-Watson,Jolanta, Takemoto,Shoko, Stanton-Geddes,Zuzana, Endo,Kenya, Takamatsu,Masatsugu
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Document Date
2020/01/18
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Document Type
Report
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Report Number
146195
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Volume No
1
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Total Volume(s)
1
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Country
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Region
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Disclosure Date
2020/02/18
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Disclosure Status
Disclosed
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Doc Name
Knowledge Note 1 : Assessing and Communicating Urban Flood Risk
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Keywords
flood; flood risk; risk assessment; coastal development; raise awareness; disaster and climate risk management; water supply and sewerage service; surface water; flood risk assessment; hazard map; disaster risk management; climate change adaptation measures; storm surge; impact of climate change; climate change impact assessment; geographic characteristic; effect of climate change; risks of climate change; urban flood; changes in land use; risk of flood damage; climate change risk; land use plan; flood risk management; business continuity plan; disaster warning system; below sea level
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Citation
Kryspin-Watson,Jolanta Takemoto,Shoko Stanton-Geddes,Zuzana Endo,Kenya Takamatsu,Masatsugu
Knowledge Note 1 : Assessing and Communicating Urban Flood Risk (English). Learning from Japan’s Experience in Integrated Urban Flood Risk Management Knowledge Notes Washington, D.C. : World Bank Group. http://documents.worldbank.org/curated/en/559101582084849743/Knowledge-Note-1-Assessing-and-Communicating-Urban-Flood-Risk