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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />- <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />4.5 100- Year Floodplain Map Delineation <br /> <br />After HEC-RAS was used to compute the surface water elevations for the 100-year peak flow, <br />the results were exported back into ArcView. The post-processing features of the HEC-GeoRAS <br />ArcView extension were used to read the HEC-RAS results, generate a water surface TIN, and <br />delineate the floodplain. These delineations were then superimposed over aerial images of the <br />study area <br /> <br />22 <br />