Laserfiche WebLink
<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />Flood Velocities <br /> <br />- SUltlARy - <br /> <br />Maximum flow velocities characteristic of a 100-year flood event are <br />tabulated at various cross sections on the profile sheets. Average channel <br />and f100dway velocities are tabulated in Table VII for each cross section. <br /> <br />This report has identified the probable flooding areas which would result <br />from a 100-year runoff event along Big Dry Creek between 168th Avenue and <br />Interstate 25, all in Adams County. <br /> <br />The 100-year flow velocities <br />wou1 d range between 5 and 9 <br />velocities reaching 10 fps. <br />range between 0 and 4 fps. <br /> <br />in the channel of the Study Reach generally <br />feet per second (fps) with maximum channel <br />Velocities in the overbank would typically <br /> <br />The floodplain limits are based on hydrologic information developed for <br />future basin conditions and existing floodplain and channel conditions as <br />shown on the maps. Floods of greater magnitude can and will occur in which <br />the limits of flooding will exceed those shown in this report. <br /> <br />Velocities in excess of 8 fps can cause severe erosion of stream banks, and <br />are capable of transporting large rocks and debris. Velocities in this <br />range can a1 so erode roadway embankments or fi 11 around bridge abutments, <br />causing possible bridge failure. Lower velocities of approximately 2 fps <br />or less will deposit debris and silt. <br /> <br />Presently there are few areas where flooding would result in extensive <br />flood damages. Regulation of future floodplain construction activities <br />will serve to minimize increases in the flood damage potential. <br />Improvements to the channel or crossing structures will serve to reduce the <br />potential for flood damage. <br /> <br />16 <br />