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<br />causing failure. <br /> <br /> <br />Floods may, unless confined. be diverted around <br /> <br /> <br />the obstruction caused by a debris fence. <br /> <br />Effectiveness <br />Reduce, <br /> <br />homes <br />yards. <br />Not effective against other hazards. <br />Useful only for debris flow events. <br />Ko examples of use in the U.S. were found. <br /> <br />but not eliminate, <br />and debris deposition <br /> <br />impact damages to <br />in streets and <br /> <br />Public Acceptance <br />Acceptance is likely to be good. because costs <br />are low and the fences are inobtrusive. <br />Costs can be paid by developers or communities. <br /> <br />.Required Mainten'lnce <br />periodic inspection and repair. <br />Cleaning of fences after floods. <br /> <br />Loca 1 Dikes <br /> <br />Susceptibility <br />Dikes are subject to overtopping, scour, and <br />impact force damages if improperly designed. <br />Sediment deposition upstream (due to blockage <br />and slowing of flow) may seriously reduce <br />effective dike height. <br />Safe design requires that <br />freeboard, adequate armoring of <br />toe, and resistance to impacts <br />local dikes on fan. <br /> <br />substantial <br />dike face and <br />be built into <br /> <br />81 <br />