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<br /> <br /> <br /> <br />FAN <br />APEX <br /> <br />CHANNELIZED <br />ZONE <br /> <br />I <br />I <br />I <br />I <br />I <br />/ <br />I/FIOW Path <br /> <br />~ <br /> <br />-- <br /> <br />-- <br /> <br />- <br /> <br />-- <br /> <br />- - <br /> <br />- <br /> <br />Figure 3-1. Hydraulic zones on a typical fan. <br /> <br />Watarshed Slope <br />and Vegetation <br /> <br />Rainfall <br />Intensity <br /> <br />Entrance Angle <br /> <br />/ <br />,-:" <br /> <br />" <br /> <br />". <br /> <br />i......: <br />'" <br /> <br />'. -. .~. <br /> <br />BRAIDED <br />ZONE <br /> <br />SHEET FLOW <br />ZONE <br /> <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />/ <br /> <br />Source: FEMA. <br /> <br />Fan Entrenchment, Bias <br /> <br />Figure 3-2. Factors affecting flood hazards on alluvial fans. <br />