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<br />TERMINOLOGY AND SYMBOLS
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<br />FIA - Federal Insurance Administration, U.S. Department of Housing and Urban Development.
<br />
<br />1970 FIA Data - Elevation versus frequency and depth versus damage data presented in "Flood
<br />Hazard Factors, Depth-Damage Curves, Elevation-Frequency Curves, Standard Rate Tables",
<br />Federal Insurance Administr~tion, September 1970.
<br />
<br />1974 FIA Data - Depth versus frequency and depth versus damage data presented in Sections 7.1
<br />and 7.2 of an unpublished report entitled "Flood Insurance Rate Calculation Computer
<br />Program" prepared by D. J. MacFadyen for the Federal Insurance Administration, 3 April 1974.
<br />The depth-frequency data are shown in Figure A-l, Appendix A, and were used in all analyses in
<br />this study.
<br />
<br />Huntington District Data - Depth versus damage data presented in an unpublished report by the
<br />Huntington District, Corps of Engineers entitled "Technical Report on Representative Flood
<br />Damage to Residential Properties", 1977.
<br />
<br />1970 FlA Data Modified - Depth versus damage data identical to 1970 FIA Data above 0.1 feet,
<br />modified slightly below 0.1 feet to approximate Huntington District Data. These modified data
<br />are tabulated in Table A-l, Appendix A, and were used in most analyses in this study.
<br />
<br />1SNB - One story, no basement structure. The depth-damage relationship for this structure is
<br />tabluated in Table A-l, Appendix A.
<br />
<br />2SNB - Two or more stories, no basement structure. See Table A-l, Appendix A for the depth-
<br />damage relationship.
<br />
<br />1SWB - One story, with basement structure. See Table A-1, Appendix A for the depth-damage
<br />relationship.
<br />
<br />2SWB - Two or more stories, with basement structure. The depth-damage relationship for this
<br />structure can be found in Table A-l, Appendix A.
<br />
<br />VC/VS - Ratio of value of contents (VC) to value of structure (VS). For most analyses in this study
<br />a ratio of 0.35 was used.
<br />
<br />FHF - Flood hazard factor. The distance in feet between the elevation of the 100 year event and
<br />the 10 year event. Each frequency relationship is identified by a flood hazard factor ranging from
<br />1.0 to 20.0 feet. See Figure A-l, Appendix A. A low FHF is characteristic of a wide, flat flood
<br />plain; a high FHF is characteristic of a narrow, steep flood plain.
<br />
<br />Skew M - The depth-frequency curves presented in the 1974 FIA Data and shown in Figure A-l,
<br />Appendix A. These curves approximate the median curves presented in the 1970 FIA Data,
<br />hence the use of the letter M in this study.
<br />
<br />Exceedance Interval - The average'time interval, in years, in which a flood of a given size is
<br />exceeded as an annual maximum. For example, 10 years, 20 years, etc.
<br />
<br />Frequency - The exceedance frequency. The probability that a flood event will exceed a
<br />specified magnitude in a given time period; usually one year, expressed as a percentage. For
<br />example, 100 percent for the annual event, SO percent for the 2 year event, 1 percent for the 100
<br />year event.
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