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<br /> 426 <br /> 425 <br /> Reference flood elevation <br /> 424 <br />c 423 Flood #1 <br />0 <br />... <br />.. 422 <br />~ <br />> <br />~ <br />... 421 <br />LU <br /> 420 Ground elevation <br /> 419 Flood #2 <br /> 418 <br /> $ Damages <br /> <br /> <br /> <br />FIGURE 4-9 <br /> <br />MULTIPLE FLOOD ELEVATIONS IN <br />CONJUNCTION WITH PERMANENT EVACUATION OF THE <br />FLOOD PLAIN <br /> <br />of ~igure 4-9, in this case, indicates that the ~rid cell would still incur <br />damages if Flood #2 occurred. The DAMCAL program has two options to permit <br />analysis of the preceding flood plain conditions: 1) to permanently evacu- <br />ate all grid cells for designated land use categories that are in the flood <br />plain or 2) to evacuate all grid cells (of the designated land use categories) <br />that incur damages due to the flood event of interest. If the latter option <br />is used for the grid cell shown in Figure 4-9, then the cell land use would <br />be removed in the case of Flood #2. <br /> <br />I <br />~ <br /> <br />, <br /> <br />Flood Plain Regulation. Flood plain regulation is the zoning of the <br /> <br /> <br />flood plain to restruct encroachment by major damageable land uses. In gen- <br /> <br />eral, if a damageable land use is placed within the flood plain, then fill <br /> <br /> <br />or some other means must be used to raise the first floor elevation above <br /> <br />4-24 <br />