Chap. 4 Assessing Flood Risk: Data, Methods and Analysis

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Chapter Summary


This chapter covers elements involved in assessing the risk posed by flooding. For the purposes of the Flood Green Guide, flood risk involves knowing (1) who can be affected, (2) how they can be affected, and (3) where they can be affected. It is critical for the guide user to understand these issues in selecting and planning for the range of flood management methods in chapter 5.

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The chapter provides a review of flood risk management information needs, tells the guide user where to find the information, and offers a simple process to understand the nature of a watershed. Since a wide range of risk assessment techniques and tools are currently available to the guide user, this chapter focuses on the results that should be produced by any risk assessment and on how these results can be used to select and manage flood management methods.

This chapter closes with a method to define institutional capacities to manage flood risk, a key consideration in deciding which flood management approaches are most appropriate for the local context.


Additional Resources


Associated Programme on Flood Management (APFM). Flood Mapping. Integrated Flood Management Tools Series, no. 20, (Geneva: WMO, 2013).

Disaster Assessment Portal

International Charter: Space and Major Disasters

International Fund for Agriculture (IFAD). Good Practices in Participatory Mapping: A review prepared for the International Fund for Agriculture, 2009.

International Federation of Red Cross and Red Crescent Global Disaster Preparedness Center, PrepareCenter.org.

UNISDR, PreventionWeb.

UNOSAT (via UNITAR)

UN-SPIDER

USAID, NOAA, SERVIR.

USGS, Hazards Data Distribution System (HDDS).
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