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7 Mapping and Risk Communication: Moving to the Future
Pages 89-100

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From page 89...
... A case can be made hazard and risk assessment data in order to maximize to further refine coastal flood insurance rate zones, flood loss reduction." FEMA envisions carrying enabling a more accurate representation of coastal flood out this RiskMap strategy by continuing to focus on hazards. improving and maintaining flood hazard data and maps while "delivering quality products and services to the Coastal A Zone right audience, using the right methods, at the right time," and by increasing local mitigation actions to Two flood insurance rate zones apply to coastal ultimately reduce losses of life and property.
From page 90...
... Retain the breaking wave threshold of 3 feet is measured by state or federal government agencies, in the V zone and formally define the coastal A zone but is not factored into flood maps, even when erosion as areas subject to breaking waves between 1.5 and rates are high compared to the lifetime of buildings. 3 feet.
From page 91...
... They can also help communicate pean Commission published an atlas of flood maps the inundation risks associated with global warming that provides examples of the best mapping techniques and sea level rise. However, although much has been used in 19 European countries, the United States, and written on risk communication in general, little formal Japan. The atlas contains examples of maps designed research has been done in the United States on effective to support risk communication, land use planning, ways to use maps to communicate flood risk to those emergency notification and response, insurance rating, in the floodplain.
From page 92...
... An interactive website enables users to choose animals, and property; orange represents moderate which features to show on the inundation map, including hazard; and yellow represents minor hazard. water depth, FEMA 100-year and 500-year floodplain Flood maps may be used to illustrate the impact boundaries and floodways, and roads.
From page 93...
... . SOURCE: , EXCIMAP Atlas of Flood Maps.
From page 94...
... Combining the appropriate attributes of information on hydrologic risk, such as the nature of FEMA DFIRMs with attributes of NOAA inundation the flows. maps, USACE risk maps, and the innovative mapping The above maps illustrate the wide variety of excit- techniques developed by state and local entities and ing products that offer significant improvements in the other countries would significantly enhance the comability to communicate risk to those in the floodplain.
From page 95...
... The topographic data, digital elevation models, and hydraulic models underlying the map were produced by the USGS office in Raleigh and the North Carolina Floodplain Mapping Program. SOURCE:
From page 96...
... bitmap image FIGURE 7.6  EOS-AIGA map of flood risk around Nimes, France. SOURCE: Météo France, Institut Géographique National.
From page 97...
... . N ­ etherlands enables users to identify ground level rela- The flood module addresses both coastal and riverine tive to mean sea level by entering a postal code. The flooding and can be operated at three different levels of elevation difference provides a sense of potential flood increasing complexity and detail (Table 7.1)
From page 98...
... outside an SFHA does not adequately convey a sense Refining current coastal flood zone definitions to corof flood hazard. Flood risk can be assessed and com- respond more closely to actual flood damage during municated more effectively in terms of the relative coastal flood events could lead to more accurate and elevations of the structures and facilities in the flood consistent insurance ratings and thus to a better sense hazard area.
From page 99...
... FEMA should commission a The variety of map products that can be generated and study on technology and metrics to analyze and comthe availability of web tools to provide personalized municate flood risk. information to floodplain occupants will enable them to make decisions that ultimately will reduce national risk in the floodplain.


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