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<br />given land use to be protected 5.3 feet. while others may only need the <br />basements flood proofed or no protection. The reason for the difference <br />in flood proofing depths is because of varying ground topography as illus- <br />trated in Fig. 5, Example Cross Section. <br /> <br />The construction of the elevation-damage functions for this alternative <br />can be performed only after flow and rating curve data are available <br />for each index location of interest. From the rating curve, the elevation of <br />the water surface at the index location which corresponds to the desired <br />protection level is determined and inputted into the computer program. <br />The corresponding elevation of the protection event is then computed for <br />each grid cell by use of the reference flood. since the water surface <br />elevation at the cell changes consiste~tly with the change in water surface <br />elevation at the index location. The designated grid cells are corres- <br />pondingly flood proofed to protect against the specified flood event. <br /> <br />'-- <br /> <br />-- <br />---- <br /> <br />A <br />. I i <br />---,-1-- <br />I'L :l. <br />- --.- <br />I I It <br />-r.J - <br />I I i <br />- .- ,- r i <br /> <br />'8 <br /> <br />I , <br />_1_'- <br />-t.1- <br /> <br />-'" _I _ ___ <br />I <br />-'-,-. <br /> <br />~ <br /> <br /> <br /> <br />A <br /> <br /> <br />"B <br /> <br />~ <br /> <br />Denotes Depth of Flood Proofing Required <br /> <br />1 <br />4 <br /> <br />Indicates Low Density Housing Land Use <br />Indicates Water Bodies Land Use <br /> <br />Fig. 5--Example Cross Section (From A to B) <br /> <br />12 <br />